CN104747309A - Engine position management system and management method - Google Patents
Engine position management system and management method Download PDFInfo
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- CN104747309A CN104747309A CN201310732772.XA CN201310732772A CN104747309A CN 104747309 A CN104747309 A CN 104747309A CN 201310732772 A CN201310732772 A CN 201310732772A CN 104747309 A CN104747309 A CN 104747309A
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- 238000007726 management method Methods 0.000 title claims abstract description 32
- 230000001360 synchronised effect Effects 0.000 claims abstract description 138
- 238000003745 diagnosis Methods 0.000 claims abstract description 15
- 206010055001 Hypodontia Diseases 0.000 claims description 90
- 206010002583 anodontia Diseases 0.000 claims description 90
- 230000005213 hypodontia Effects 0.000 claims description 90
- 201000006680 tooth agenesis Diseases 0.000 claims description 90
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- 238000012795 verification Methods 0.000 claims description 22
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Abstract
The invention discloses an engine position management system. The engine position management system comprises a crankshaft signal panel, a crankshaft position sensor, a camshaft signal panel, a camshaft position sensor and an eTPU control unit, wherein the crankshaft signal panel comprises multiple convex teeth and tooth gaps; the tooth gaps have a large tooth gap for positioning; and the camshaft signal panel comprises three convex teeth with different central angles and tooth gaps. The eTPU control unit comprises a crankshaft signal processing module, a crankshaft fault diagnosis module, a camshaft signal processing module, a camshaft fault diagnosis module and a limp return and synchronous logic processing module. The engine position management system can use crankshaft signals and camshaft signals for realizing quick cylinder judgment and synchronization of an engine when the camshaft position sensor and the camshaft position sensor are normal, and can use another sensor for realizing the cylinder judgment synchronization and providing the angle information with limited precision to realize the limb return of the engine when one sensor is broken down. The invention further provides a management method of the engine position management system.
Description
Technical field
The present invention relates to motor, particularly relate to a kind of engine location management system; The invention still further relates to a kind of management method of engine location management system.
Background technique
The present age, motor was in order to improve its Economy, stability and improve its emission performance, adopted advanced electronic control unit to become inexorable trend.The control stress point of motor is the mechanical location accurately finding motor fast, and electric control system controls precision depends on accuracy and the precision of engine running position to a great extent.At present in the industry mainly through while collecting crankshaft signal and camshaft signal, and the Main Means measured as engine location that two signal combination are got up.Crankshaft signal is read by crankshaft sensor, and camshaft signal is read by camshaft-signal sensor.Crankshaft sensor comprises the circular metal rotating disk being arranged on engine crankshaft tail end, and the magnetoelectric be fixedly mounted near rotating disk or hall sensor.CMPS Camshaft Position Sensor comprises the circular metal rotating disk being arranged on engine cam shaft end and the magnetoelectricity fixedly mounted in its vicinity or Hall transducer and forms.Crankshaft sensor rotating disk edge is dispersed with some metal protuberances uniformly, defines the hypodontia part on rotating disk after removing wherein particular protrusion.
When bent axle or camshaft-signal sensor break down, if fault effectively can not be identified or can not adopt an effective measure after identifying fault, motor will lose position information and uncontrollable, gently then cause roadside breakdown, heavy then damage motor and even cause traffic accident.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of engine location management system, can realize sentencing cylinder and synchronous fast to motor, can provide high-precision Angle ambiguity information after synchronous; The fault type of each sensor accurately can be judged when position sensor failure; Another sensor can be utilized in a certain sensor fault situation to realize sentencing cylinder synchronous and provide the angle information of finite accuracy simultaneously, realize the limp-home of motor.For this reason, the present invention also provides a kind of management method of engine location management system.
For solving the problems of the technologies described above, engine location management system provided by the invention comprises:
Crankshaft signal dish, on the bent axle being arranged on motor and with described crank rotation, the excircle of described crankshaft signal dish is formed with multiple first double wedge, form the first tooth between two adjacent described first double wedges to lack, described first tooth lack comprise first canine tooth lack and multiple first little tooth lack, the central angle of each described first double wedge is identical, the central angle that each described first little tooth lacks is all identical with the central angle of each described first double wedge, and the central angle that described first canine tooth lacks is 5 times of the central angle of 1 described first double wedge.
Crankshaft position sensor, for detecting at described crankshaft signal dish with lacking described first double wedge and described first tooth during described crank rotation and form crankshaft signal, described crankshaft signal is used to indicate crank angle information and the crank position information of described motor.
Camshaft signal disk, on the camshaft being arranged on described motor and with described cam axle, the excircle of described camshaft signal disk is formed with 3 the second double wedges, form the second tooth between two adjacent described second double wedges to lack, the central angle of each described second double wedge is different, and the central angle that each described second tooth lacks is also different.
CMPS Camshaft Position Sensor, for detecting at described camshaft signal disk with lacking described second double wedge and described second tooth during described crank rotation and form camshaft signal; Described camshaft signal is used to indicate the operation cycle position information of described motor.
Enhancement mode Time Processing Unit (eTPU) control unit, described eTPU control unit comprises crankshaft signal puocessing module, crankshaft fault diagnostic module, camshaft signal puocessing module, camshaft fault diagnosis module, limp-home and synchronous logic puocessing module.
Described crankshaft signal puocessing module connects described crankshaft position sensor and receives described crankshaft signal, and described crankshaft signal puocessing module is used for processing described crankshaft signal and identifies the position information that each described first double wedge and each described first tooth lack, when described crankshaft position sensor is normal, described crankshaft signal after process is made up of low and high level, the position information of each described first double wedge corresponds to the high level pulse of described crankshaft signal, the position information that each described first tooth lacks corresponds to the low level pulse of described crankshaft signal, the each described low level pulse of described crankshaft signal and the described high level pulse of its rear adjacent form a tooth rim phase, the described low level pulse corresponding to position information making described first canine tooth lack is the first low level pulse, the tooth rim phase corresponding to described first low level pulse was the first tooth rim phase, the tooth rim phase corresponding to previous described low level pulse of described first low level pulse was the second tooth rim phase, the tooth rim phase corresponding to a rear described low level pulse of described first low level pulse was the 3rd tooth rim phase, the described first tooth rim phase be multiplied by one be less than the hypodontia checkout coefficient of 1 after be greater than described second tooth rim phase and described 3rd tooth rim phase respectively.
Described camshaft signal puocessing module connects described CMPS Camshaft Position Sensor and receives described camshaft signal, described camshaft signal puocessing module is used for processing described camshaft signal, when described CMPS Camshaft Position Sensor is normal, described camshaft signal after process is made up of low and high level, the position information of each described second double wedge corresponds to the high level pulse of described camshaft signal, and the position information that each described second tooth lacks corresponds to the low level pulse of described camshaft signal.
The input end of described crankshaft fault diagnostic module is connected with described crankshaft signal puocessing module, for judging that whether described crankshaft position sensor is normal, when described crankshaft position sensor is normal, described crankshaft signal is input in described limp-home and synchronous logic puocessing module by the output terminal of described crankshaft fault diagnostic module; When described crankshaft position sensor has a fault, described crankshaft signal is not input in described limp-home and synchronous logic puocessing module.
The input end of described camshaft fault diagnosis module is connected with described camshaft signal puocessing module, for judging that whether described CMPS Camshaft Position Sensor is normal, when described CMPS Camshaft Position Sensor is normal, described camshaft signal is input in described limp-home and synchronous logic puocessing module by the output terminal of described camshaft fault diagnosis module; When described CMPS Camshaft Position Sensor has a fault, described camshaft signal is not input in described limp-home and synchronous logic puocessing module.
Described limp-home and synchronous logic puocessing module are used for carrying out synchronous to described motor and sentencing cylinder:
When described crankshaft position sensor and described CMPS Camshaft Position Sensor are all normal, described limp-home and synchronous logic puocessing module are carried out Fast synchronization according to described crankshaft signal and described camshaft signal and are sentenced cylinder, crankshaft rotating two described in a work cycle of described motor is enclosed, described camshaft revolves and turns around, determine the synchronous of described motor and position information by the level of described camshaft signal corresponding to described first low level pulse in described crankshaft signal and described first low level pulse position, realize the synchronous of described motor and sentence cylinder.
When described crankshaft position sensor has fault, described CMPS Camshaft Position Sensor normal, described limp-home is carried out synchronous with synchronous logic puocessing module according to described camshaft signal and is sentenced cylinder, export the synchronous and position information required for described engine control, realize only there is being the limp-home function under described camshaft signal state.
When normal, the described CMPS Camshaft Position Sensor of described crankshaft position sensor has fault, described limp-home and synchronous logic puocessing module according to described crankshaft signal and carry out examination spray realize synchronous and sentence cylinder, export the synchronous and position information required for described engine control, realize only there is being the limp-home function under described crankshaft signal state.
When described crankshaft position sensor has fault and described CMPS Camshaft Position Sensor to have a fault, described limp-home and synchronous logic puocessing module forbid carrying out sentencing cylinder working, and remove after described motor is shut down and forbid.
Further improvement is, the number of described first double wedge on described crankshaft signal dish is 58, the number that described first little tooth lacks is 57, and the central angle that each described first double wedge and each described first little tooth lack is all 3 degree, and the central angle that described first canine tooth lacks is 15 degree; In described crankshaft signal, described first little tooth lacks the angle of the tooth rim phase of the described high level pulse composition of corresponding low level pulse and its rear adjacent and corresponds to 6 degree, and described eTPU control unit provides precision to be the crank angle control information of 0.06 degree after carrying out frequency multiplication to described crankshaft signal.
Further improvement is, described crankshaft signal puocessing module comprises the process of described crankshaft signal and identification:
The high-frequency noise that enable passage noise filtering function filters out described crankshaft signal is configured by eTPU passage.
Detect the change edge of described crankshaft signal after the power-up, the laggard line time filtering in first edge of described crankshaft signal detected, time filtering is do not read the described crankshaft signal in a period of time, detect the next hopping edge of described crankshaft signal after time set by transit time filtering again, then carry out tooth filtering.
Tooth filtering continues to detect described crankshaft signal, described first little tooth lacks the tooth rim phase corresponding tooth signal that the corresponding low level pulse high level pulse described first double wedge corresponding to adjacent with it forms, described tooth filtering is used for the described tooth target signal filter of some, after the described tooth signal capturing the quantity set by described tooth filtering, carry out hypodontia searching, described hypodontia is found and is used for determining described first low level pulse.
Further improvement is, described hypodontia checkout coefficient is 0.5.
Further improvement is, the fault of described crankshaft position sensor comprises without crankshaft signal fault and crankshaft signal abnormal failure; Described without crankshaft signal fault correspond to described crankshaft position sensor do not detect described crankshaft signal; Described crankshaft signal abnormal failure correspond to described crankshaft position sensor detect described crankshaft signal and described in exist in the described crankshaft signal that detects and set each described first double wedge or each described first tooth lack not corresponding pulse.
Further improvement is, the fault of described CMPS Camshaft Position Sensor comprises without camshaft signal fault and camshaft signal abnormal failure; Described without camshaft signal fault correspond to described CMPS Camshaft Position Sensor do not detect described camshaft signal; Described camshaft signal abnormal failure correspond to described CMPS Camshaft Position Sensor detect described camshaft signal and described in there is the situation deviating from set identification window in the hopping edge of described camshaft signal detected.
Further improvement is, normal at described crankshaft position sensor, when described CMPS Camshaft Position Sensor has a fault, described limp-home is carried out synchronous with synchronous logic puocessing module according to described crankshaft signal and is sentenced cylinder, described in a work cycle of described motor, crankshaft rotating two is enclosed, described first low level pulse in described crankshaft signal occurs twice, carry out first time at a described first low level pulse place of described crankshaft signal and try spray, if in the periodicity of the described crankshaft signal of setting, the rotating speed of described motor reaches setting value after described first time examination spray, the examination spray of described first time to sentence cylinder result correct, if after the examination spray of described first time in the periodicity of the described crankshaft signal of setting the rotating speed of described motor do not reach setting value, the cylinder result of sentencing of described first time examination spray is overturn and obtains correct sentencing cylinder result.
Further improvement is, when normal, the described CMPS Camshaft Position Sensor of described crankshaft position sensor has fault, described limp-home and synchronous logic puocessing module are carried out synchronous according to described crankshaft signal and are sentenced in cylinder, when after described first time examination spray, in the periodicity of 4 described crankshaft signals, the rotating speed of described motor reaches 400rpm described first time examination spray to sentence cylinder result correct; When the rotating speed of described motor does not reach 400rpm in the periodicity of 4 described crankshaft signals after the examination spray of described first time, the cylinder result of sentencing of described first time examination spray is overturn and obtains correct sentencing cylinder result.
Further improvement is, when described crankshaft signal is normal, described eTPU control unit adopts described crankshaft signal as clock source, provides angle clock information; When described engine start or when crankshaft signal breaks down described in described engine operation process, need to cut off described crankshaft signal as clock source, switch to and use described camshaft signal as clock source, angle clock information is provided.
For solving the problems of the technologies described above, the management method of engine location management system provided by the invention adopts following steps to determine the position of described motor:
The crank rotation of described motor also drives described crankshaft signal dish to rotate, and described crankshaft position sensor lacks described first double wedge and described first tooth and detects and form described crankshaft signal.
The cam axle of described motor also drives described camshaft signal disk to rotate, and the speed of described cam axle is the half of the speed of described crank rotation.
Described crankshaft signal puocessing module processes described crankshaft signal and identifies.
Described camshaft signal puocessing module processes described camshaft signal.
Described crankshaft fault diagnostic module judges that whether described crankshaft position sensor is normal, is input to by described crankshaft signal in described limp-home and synchronous logic puocessing module when described crankshaft position sensor is normal; When described crankshaft position sensor has fault, described crankshaft signal is not input in described limp-home and synchronous logic puocessing module.
Described camshaft fault diagnosis module judges that whether described CMPS Camshaft Position Sensor is normal, is input to by described camshaft signal in described limp-home and synchronous logic puocessing module when described CMPS Camshaft Position Sensor is normal; When described CMPS Camshaft Position Sensor has fault, described camshaft signal is not input in described limp-home and synchronous logic puocessing module.
Described limp-home is carried out synchronous with synchronous logic puocessing module to described motor and is sentenced cylinder:
When described crankshaft position sensor and described CMPS Camshaft Position Sensor are all normal, described limp-home and synchronous logic puocessing module are carried out Fast synchronization according to described crankshaft signal and described camshaft signal and are sentenced cylinder, described in a work cycle of described motor, crankshaft rotating two is enclosed, described camshaft revolves and turns around, the synchronous of described motor is realized by described first low level pulse found in described crankshaft signal, undertaken sentencing cylinder by the level reading described camshaft signal corresponding to described first low level pulse place in described crankshaft signal thus determine the synchronous of described motor and position information, realize the synchronous of described motor and sentence cylinder.
When described crankshaft position sensor has fault, described CMPS Camshaft Position Sensor normal, described limp-home is carried out synchronous with synchronous logic puocessing module according to described camshaft signal and is sentenced cylinder, export the synchronous and position information required for described engine control, realize only there is being the limp-home function under described camshaft signal state.
When normal, the described CMPS Camshaft Position Sensor of described crankshaft position sensor has fault, described limp-home and synchronous logic puocessing module according to described crankshaft signal and carry out examination spray realize synchronous and sentence cylinder, export the synchronous and position information required for described engine control, realize only there is being the limp-home function under described crankshaft signal state.
When described crankshaft position sensor has fault and described CMPS Camshaft Position Sensor to have a fault, described limp-home and synchronous logic puocessing module forbid carrying out sentencing cylinder working, and remove after described motor is shut down and forbid.
Further improvement is, described crankshaft signal puocessing module comprises the process of described crankshaft signal and identification:
The high-frequency noise that enable passage noise filtering function filters out described crankshaft signal is configured by eTPU passage.
Detect the change edge of described crankshaft signal after the power-up, the laggard line time filtering in first edge of described crankshaft signal detected, time filtering is do not read the described crankshaft signal in a period of time, detect the next hopping edge of described crankshaft signal after time set by transit time filtering again, then carry out tooth filtering.
Tooth filtering continues to detect described crankshaft signal, described first little tooth lacks the tooth rim phase corresponding tooth signal that the corresponding low level pulse high level pulse described first double wedge corresponding to adjacent with it forms, described tooth filtering is used for the described tooth target signal filter of some, after the described tooth signal capturing the quantity set by described tooth filtering, carry out hypodontia searching, described hypodontia is found and is used for determining described first low level pulse.
In the described hypodontia searching stage, window filtering will be carried out to each described tooth signal before finding described first canine tooth to lack corresponding described first low level pulse, namely all edges of each described tooth signal all should appear in window, and then ABa verification is carried out to each edge of each described tooth signal, if having passed verification is now that described first canine tooth lacks corresponding described first low level pulse; Described ABa is verified as: B corresponds to the tooth rim phase size corresponding to current described tooth signal, A corresponds to the tooth rim phase size corresponding to previous described tooth signal, a corresponds to the tooth rim phase size corresponding to a rear described tooth signal, judge that B is multiplied by a hypodontia checkout coefficient being less than 1 and whether is greater than A, judge that B is multiplied by a hypodontia checkout coefficient being less than 1 and whether is greater than a, if B is multiplied by a hypodontia checkout coefficient being less than 1 be greater than A and B respectively, then ABa verification is passed through; If B is multiplied by a hypodontia checkout coefficient being less than 1 be less than A or B, then ABa verification is not passed through.
Further improvement is, normal at described crankshaft position sensor, when described CMPS Camshaft Position Sensor has a fault, described limp-home is carried out synchronous with synchronous logic puocessing module according to described crankshaft signal and is sentenced cylinder, described in a work cycle of described motor, crankshaft rotating two is enclosed, described first low level pulse in described crankshaft signal occurs twice, carry out first time at a described first low level pulse place of described crankshaft signal and try spray, if in the periodicity of the described crankshaft signal of setting, the rotating speed of described motor reaches setting value after described first time examination spray, the examination spray of described first time to sentence cylinder result correct, if after the examination spray of described first time in the periodicity of the described crankshaft signal of setting the rotating speed of described motor do not reach setting value, the cylinder result of sentencing of described first time examination spray is overturn and obtains correct sentencing cylinder result.
The present invention can realize sentencing cylinder and synchronous fast to motor, can provide high-precision Angle ambiguity information after synchronous; The fault type of each sensor accurately can be judged when position sensor failure; Another sensor can be utilized in a certain sensor fault situation to realize sentencing cylinder synchronous and provide the angle information of finite accuracy simultaneously, realize the limp-home of motor.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 is the structural representation of embodiment of the present invention engine location management system;
Fig. 2 is the Cleaning Principle figure of the crankshaft signal of the embodiment of the present invention;
Fig. 3 is the logic diagram of the engine synchronization of the embodiment of the present invention;
Fig. 4 is the schematic diagram 1 of the sync state saltus step of the embodiment of the present invention;
Fig. 5 is the schematic diagram 2 of the sync state saltus step of the embodiment of the present invention;
Fig. 6 is the schematic diagram without crankshaft signal fault of the embodiment of the present invention;
Fig. 7 is the schematic diagram without camshaft signal fault of the embodiment of the present invention;
Fig. 8 is the schematic diagram of the crankshaft signal abnormal failure of the embodiment of the present invention;
Fig. 9 is the schematic diagram without camshaft signal abnormal failure of the embodiment of the present invention;
Figure 10 is the engine synchronization flow chart of the embodiment of the present invention;
Figure 11 is embodiment of the present invention Troubleshooting Flowchart;
Figure 12 is that the camshaft signal that only adopts of the embodiment of the present invention carries out the synchronous schematic diagram with sentencing cylinder.
Embodiment
As shown in Figure 1, be the structural representation of embodiment of the present invention engine location management system; Embodiment of the present invention engine location management system comprises:
Crankshaft signal dish 1, on the bent axle being arranged on motor and with described crank rotation, the excircle of described crankshaft signal dish 1 is formed with multiple first double wedge 1a, form the first tooth between two adjacent described first double wedge 1a to lack, described first tooth lacks and comprises first canine tooth and lack 1c and multiple first little tooth lacks 1b, the central angle of each described first double wedge 1a is identical, the central angle that each described first little tooth lacks 1b is all identical with the central angle of each described first double wedge 1a, and the central angle that described first canine tooth lacks 1c is 5 times of the central angle of 1 described first double wedge 1a.Be preferably, the number of the described first double wedge 1a on described crankshaft signal dish 1 is 58, the number that described first little tooth lacks 1b is 57, and the central angle that each described first double wedge 1a and each described first little tooth lack 1b is all 3 degree, and the central angle that described first canine tooth lacks 1c is 15 degree.Lack by described first canine tooth of described crankshaft signal dish 1 top dead center (Top Dead Center, the TDC) position that 1c defines the cylinder of described motor, as shown in the dotted line 1d in Fig. 1, position corresponds to TDC.TDC corresponds to the compression point position of cylinder, a work cycle of motor comprises four strokes, described bent axle can rotate 2 circles, four strokes are respectively air inlet, compression, acting and exhaust, piston wherein in compression and exhaust stroke in cylinder all can reach top dead center, therefore the piston in cylinder can reach top dead center twice, be once be vented, once for compressing.The setting that each described first double wedge 1a and each described first little tooth lack 1b can realize the accurate location of the angle of swing of bent axle.
Crankshaft position sensor 2, for detecting at described crankshaft signal dish 1 with lacking described first double wedge 1a and described first tooth during described crank rotation and form crankshaft signal signal1, described crankshaft signal signal1 is used to indicate crank angle information and the crank position information of described motor.Form a set of crankshaft sensor 3 by described crankshaft signal dish 1 and described crankshaft position sensor 2, wherein said crankshaft position sensor 2 can be magnetoelectric or hall sensor.
Camshaft signal disk 4, on the camshaft being arranged on described motor and with described cam axle, the excircle of described camshaft signal disk 4 is formed with 3 the second double wedge 4a, form the second tooth between two adjacent described second double wedge 4a and lack 4b, the central angle of each described second double wedge 4a is different, and the central angle that each described second tooth lacks 4b is also different.Generally connected by chain or belt between described camshaft and described bent axle, velocity ratio is fixed as 2:1, crankshaft rotating two described in a work cycle of described motor is enclosed, described camshaft revolves and turns around, and the circulation of described like this camshaft is identical with the cycle of the work cycle of whole described motor.Position as shown in the dotted line 4c in Fig. 1, this position lacks 4b respectively through described second double wedge 4a and described second tooth, lack 4b position can determine that the described first canine tooth TDC lacked corresponding to 1c of described crankshaft signal dish 1 is the top dead center corresponding to exhaust or compression completely so lack described second double wedge 4a corresponding to 1c position, described dotted line 4c or described second tooth by described first canine tooth of described crankshaft signal dish 1, namely realize sentencing cylinder, also can determine the position of motor completely; When motor has multiple cylinder, the phase place between adjacent cylinder is fixed, and be staggered between namely adjacent cylinder a fixing angle, so all the position of cylinder can accurately obtain.
CMPS Camshaft Position Sensor 5, for detecting at described camshaft signal disk 4 with lacking 4b to described second double wedge 4a and described second tooth during described crank rotation and form camshaft signal signal2; Described camshaft signal signal2 is used to indicate the operation cycle position information of described motor.Form a set of camshaft-signal sensor 6 by described camshaft signal disk 4 and described CMPS Camshaft Position Sensor 5, wherein said CMPS Camshaft Position Sensor 4 can be magnetoelectric or hall sensor.
ETPU control unit 7, described eTPU control unit 7 comprises crankshaft signal puocessing module 8, crankshaft fault diagnostic module 9, camshaft signal puocessing module 10, camshaft fault diagnosis module 11, limp-home and synchronous logic puocessing module 12.
Described crankshaft signal puocessing module 8 connects described crankshaft position sensor 2 and receives described crankshaft signal signal1, is read by eTPU [0] passage.Described crankshaft signal puocessing module 8 is for identifying to described crankshaft signal signal1 process the position information that each described first double wedge 1a and each described first tooth lack.As shown in Figure 3, when described crankshaft position sensor 2 is normal, described crankshaft signal signal1 after process is made up of low and high level, the position information of each described first double wedge 1a corresponds to the high level pulse of described crankshaft signal signal1, and the position information that each described first tooth lacks corresponds to the low level pulse of described crankshaft signal signal1; As can be seen from the diagram of the described crankshaft signal signal1 of Fig. 3, cylinder 1Cylinder1 and cylinder 2Cylinder2 corresponds to two continuous print that namely two different cycles of crankshaft signal also correspond respectively to bent axle and rotates circle, 58 high level pulses are had in described crankshaft signal signal1 corresponding to crankshaft rotating one week, be low level pulse between high level pulse, have the less low level pulse of 57 pulse widths and the larger low level pulse of a width.The each described low level pulse of described crankshaft signal signal1 and the described high level pulse of its rear adjacent form a tooth rim phase, the described low level pulse corresponding to position information making described first canine tooth lack 1c is the first low level pulse, the tooth rim phase corresponding to described first low level pulse was the first tooth rim phase, the tooth rim phase corresponding to previous described low level pulse of described first low level pulse was the second tooth rim phase, the tooth rim phase corresponding to a rear described low level pulse of described first low level pulse was the 3rd tooth rim phase, the described first tooth rim phase be multiplied by one be less than the hypodontia checkout coefficient of 1 after be greater than described second tooth rim phase and described 3rd tooth rim phase respectively.In described crankshaft signal signal1, described first little tooth lacks the angle of the tooth rim phase of the described high level pulse composition of low level pulse corresponding to 1b and its rear adjacent and corresponds to 6 degree, and described eTPU control unit 7 provides precision to be the crank angle control information of 0.06 degree after carrying out frequency multiplication to described crankshaft signal signal1.
Being preferably, as shown in Figure 2, is the Cleaning Principle figure of the crankshaft signal of the embodiment of the present invention; The processing and identification process one of whole described crankshaft signal signal1 co-exists in 6 kinds of process respectively in embodiments of the present invention: noise filtering process, time filtering process, tooth filtering process, windows detecting process, hypodontia check processing, the credible check processing of rotating speed, be respectively:
As shown in the step 102 in Fig. 2, configure by eTPU passage the high-frequency noise that enable passage noise filtering function filters out described crankshaft signal signal1, also namely the configuration of eTPU passage is realized by the configuration of register, and high-frequency noise noise can be removed.Because engine operating environments is very complicated, in vehicle circuitry, there are starting electrical machinery, generator, various solenoid valve, relay circuit element; They constantly produce complicated high-frequency electromagnetic interference in the course of the work.Undesired signal is different from actual signal, by arranging channel register, can be configured the channel filtering parameter of the input channel ETPU [0] of described crankshaft signal signal1, make the signal period be less than the signal of designated period edge can not identify by passage, so just achieve the eliminating to high-frequency interferencing signal, complete channel noise filtering.
As shown in the step 103 in Fig. 2, because when engine start, starting electrical machinery drags in the process of engine running, particularly moment of just having powered on of starter motor, disturb particularly serious, now speed of crankshaft is relatively low, and now described crankshaft signal signal1 is relatively weak; Described crankshaft signal signal1 when wanting filtering just to start, is identified to prevent error signal.Specific implementation is, detect the change edge of described crankshaft signal signal1 after the power-up, the filtering stage corresponding to Blank time in the laggard line time filtering in first edge of described crankshaft signal signal1 and Fig. 2 detected, also namely start to enter timing mode, the time of timing is determined by upper-position unit parameters, do not accept any crankshaft signal edge when timing reaches front eTPU [0], namely the time is filtered into and does not read the described crankshaft signal signal1 in a period of time.Detect the next hopping edge of described crankshaft signal signal1 after time set by transit time filtering again, then carry out tooth filtering, tooth filtering corresponds to the Blank Tooth stage in Fig. 2.
Step 104 tooth filtering process: after time filtering completes, this process can be entered; Filtering is carried out to the crankshaft signal of initial start stage.After entering this process, eTPU module acceptable to new bent axle edge, but takes software not carry out any process, until reach the tooth filtering number of setting.
Tooth filtering continues to detect described crankshaft signal signal1, described first little tooth lacks the tooth rim phase corresponding tooth signal that low level pulse corresponding to a 1b high level pulse described first double wedge 1a corresponding to adjacent with it forms, described tooth filtering is used for the described tooth target signal filter of some, hypodontia searching is carried out after the described tooth signal capturing the quantity set by described tooth filtering, described hypodontia is found and is used for determining described first low level pulse, and hypodontia finds the stage corresponding to the step 104 and 105 in Fig. 2.Namely tooth filtering carries out filtering with to the crankshaft signal of initial start stage.After entering this process, eTPU module is receptible to new described crankshaft signal signal1 edge, but acquisition software does not carry out any process, until reach the tooth filtering number of setting, is carrying out follow-up step afterwards.
As shown in the step 104 in Fig. 2, in the hypodontia searching stage in the embodiment of the present invention, window filtering will be carried out to each described tooth signal before finding described first canine tooth to lack corresponding described first low level pulse, namely all edges of each described tooth signal all should appear in window, and then carry out ABa verification to each edge of each described tooth signal.After transit time filtering, tooth filtering, the calculating that the described crankshaft signal signal1 collected carries out the tooth rim phase can be received, and then obtain rotary speed information and position information.Due to motor have rotator inertia therefore rotational velocity can not suddenly change, so on known when a tooth rim phase, the edge of next tooth should appear in certain scope; Around this principle design a kind of scheme of window filtering, after eTPU [0] receives the edge of effective described crankshaft signal signal1, according to the time clock TCR1 of eTPU module, calculate the time apart from last edge, and then obtain current tooth rim phase T_period; Calculate the window excursion of next tooth rim phase again according to the maximum variance ratio of rotating speed, just can obtain the window of next edge appearance according to this scope:
The open angle of window: last time window end time+tooth rim Qi – window excursion;
The closing angle of window: last time window end time+tooth rim phase+window excursion.
By setting window excursion, the edge outside window can be automatically ignored; In order to prevent window filtering from causing dropout, an edge can be inserted at close place.
As shown in the step 103 in Fig. 2, it is crank position label that described first canine tooth lacks, then can be learnt the position of described bent axle by described first low level pulse read in described crankshaft signal signal1, described first low level pulse in described crankshaft signal signal1 is that motor sentences cylinder and synchronous prerequisite; Described ABa is verified as: B corresponds to the tooth rim phase size corresponding to current described tooth signal and the T in Fig. 2
b, A corresponds to the tooth rim phase size corresponding to previous described tooth signal and the T in Fig. 2
a, a corresponds to the tooth rim phase size corresponding to a rear described tooth signal and the T in Fig. 2
a, judge that B is multiplied by a hypodontia checkout coefficient being less than 1 and whether is greater than A, judge that B is multiplied by a hypodontia checkout coefficient being less than 1 and whether is greater than a, if B is multiplied by a hypodontia checkout coefficient being less than 1 be greater than A and B respectively, then ABa verification is passed through; If B is multiplied by a hypodontia checkout coefficient being less than 1 be less than A or B, then ABa verification is not passed through.Use T
a, T
band T
athe described ABa represented verifies the formula passed through and is:
T
B×Gap_Ratio>T
A；
T
B×Gap_Ratio>T
a。
In above-mentioned formula, Gap_Ratio represents hypodontia checkout coefficient.If have passed described ABa to verify, the described low level pulse corresponding to this tooth signal lacks described first low level pulse corresponding to 1c for described first canine tooth.In the embodiment of the present invention, the central angle lacking 1b due to each described first double wedge 1a and each described first little tooth is all 3 degree, the central angle that described first canine tooth lacks 1c is 15 degree, therefore under normal circumstances, the first tooth rim phase corresponding to described first low level pulse lacks 3 times of the tooth rim phase corresponding to 1b for an a described first double wedge 1a and described first little tooth, within the scope of the normal acceleration of engine running, the described first tooth rim phase is bound to exceed 2 times of the orthodont cycle outside the described first tooth rim phase, therefore hypodontia checkout coefficient is set to 0.5 in the embodiment of the present invention.
As shown in the step 106 in Fig. 2, after described first low level pulse finding described first canine tooth to lack corresponding to 1c, described crankshaft signal signal1 enters normal operating phase, now except carrying out except window filtering to the tooth signal of each described crankshaft signal signal1, also the verification of rotating speed credibility to be carried out to each tooth signal; The verification of rotating speed credibility needs first to set the speed range that may occur; As minimum speed and the maximum speed of motor, if the instantaneous speed of crankshaft that the current tooth rim phase captured according to described crankshaft signal signal1 calculates has exceeded this scope, then think irrational crankshaft signal, now the transient speed of motor is not upgraded.
Described camshaft signal puocessing module 10 connects described CMPS Camshaft Position Sensor 5 and receives described camshaft signal signal2, is read by eTPU [1] passage.Described camshaft signal puocessing module 10 is for described camshaft signal signal2 process, when described CMPS Camshaft Position Sensor 5 is normal, described camshaft signal signal2 after process is made up of low and high level, the position information of each described second double wedge 4a corresponds to the high level pulse of described camshaft signal signal2, and each described second tooth lacks the low level pulse of position information corresponding to described camshaft signal signal2 of 4b.As can be seen from the diagram of the described camshaft signal signal2 of Fig. 3, described camshaft signal signal2 is made up of the different high level pulse of pulse width and low level pulse, and camshaft often rotates the pulse signal that can produce 3 dutycycles for a week and not wait.
The input end of described crankshaft fault diagnostic module 9 is connected with described crankshaft signal puocessing module 8, whether normal for judging described crankshaft position sensor 2, when described crankshaft position sensor 2 is normal, described crankshaft signal signal1 is input in described limp-home and synchronous logic puocessing module 12 by the output terminal of described crankshaft fault diagnostic module 9; When described crankshaft position sensor 2 has a fault, described crankshaft signal signal1 is not input in described limp-home and synchronous logic puocessing module 12.The fault of described crankshaft position sensor 2 comprises without crankshaft signal fault and crankshaft signal signal1 abnormal failure.
As shown in Figure 6, be the schematic diagram without crankshaft signal fault of the embodiment of the present invention; Described without crankshaft signal fault correspond to described crankshaft position sensor 2 do not detect described crankshaft signal signal1; The described camshaft signal signal2 of hypothesis in Fig. 6 is correct, and signal signal1a corresponds to described crankshaft signal signal1 plotted curve under normal circumstances i.e. curve ideally; Signal signal1b is corresponding to the curve detected, signal signal1b does not detect any pulse signal, therefore the situation corresponding to Fig. 6 is described without crankshaft signal fault.Judgement without crankshaft signal fault realizes: if described camshaft signal signal2 has received 6 edges, comprises 3 rising edges and 3 trailing edges; Now also do not accept any trailing edge of described crankshaft signal signal1, then now can judge to there occurs without crankshaft signal fault.
Described crankshaft signal signal1 abnormal failure correspond to described crankshaft position sensor 2 detect described crankshaft signal signal1 and described in exist in the described crankshaft signal signal1 that detects and set each described first double wedge 1a or each described first tooth lack not corresponding pulse.As shown in Figure 8, be the schematic diagram of crankshaft signal abnormal failure of the embodiment of the present invention; The described camshaft signal signal2 of hypothesis in Fig. 8 is correct, and signal signal1a corresponds to described crankshaft signal signal1 plotted curve under normal circumstances i.e. curve ideally; Signal signal1c corresponds to plotted curve during described crankshaft signal exception, and described crankshaft signal is abnormal comprises two kinds of situations:
The first is hypodontia exception: as shown in square frame 14 region, hypodontia should be there is under normal circumstances in this square frame 14 region, should be there is the first canine tooth that namely two hypodontias be formed with scarce two teeth in described crankshaft signal dish 1 and lack 1c in this square frame 14 region in embodiments of the present invention, but actual is many double wedge positive level pulses in square frame 14, makes square frame 14 region cannot be verified by ABa.The judgement of the situation of hypodontia exception carries out the counting of tooth signal to described crankshaft signal signal1 and carries out hypodontia searching, namely if when the counting of tooth signal reaches that 120 described crankshaft rotating 2 circles are above, still do not find described first canine tooth verified by ABa to lack described first low level pulse corresponding to 1c, then judge that this exception is as hypodontia exception.
The second is that the number of teeth is abnormal: if when the hypodontia of bent axle is normal when the first canine tooth being formed with scarce two teeth in described crankshaft signal dish 1 lacks 1c and read in described crankshaft signal described first canine tooth lack the first low level pulse corresponding to 1c time, if described crankshaft signal signal1 introduces clutter, the tooth of identification can be caused number more than orthodont situation; Or as shown in square frame 13 region, the abnormal disappearance of the tooth due to described crankshaft signal dish 1 can cause the number of teeth of described crankshaft signal signal1 to reduce.Namely the verification of this two classes fault hypodontia all normally can both be found by hypodontia, but actual described crankshaft signal signal1 has been abnormal.The judgement of number of teeth exception is, after described first low level pulse finding described first canine tooth to lack corresponding to 1c, high level pulse after this first low level pulse is counted, count value does AB verification again after reaching 58, AB be verified as described ABa verify in B be multiplied by a hypodontia checkout coefficient being less than 1 and whether be greater than A, also i.e. formula T
b× Gap_Ratio>T
awhether set up, if set up, like this just there is not the number of teeth abnormal in verification succeeds; If be false, then total number of teeth of described crankshaft signal signal1 is not 60-2 that is 58.
The input end of described camshaft fault diagnosis module 11 is connected with described camshaft signal puocessing module 10, whether normal for judging described CMPS Camshaft Position Sensor 5, when described CMPS Camshaft Position Sensor 5 is normal, described camshaft signal signal2 is input in described limp-home and synchronous logic puocessing module 12 by the output terminal of described camshaft fault diagnosis module 11; When described CMPS Camshaft Position Sensor 5 has a fault, described camshaft signal signal2 is not input in described limp-home and synchronous logic puocessing module 12.
The fault of described CMPS Camshaft Position Sensor 5 comprises without camshaft signal fault and camshaft signal abnormal failure.
As shown in Figure 7, be the schematic diagram without camshaft signal fault of the embodiment of the present invention; Described without camshaft signal fault correspond to described CMPS Camshaft Position Sensor 5 do not detect described camshaft signal signal2; The described crankshaft signal signal1 of hypothesis in Fig. 7 is correct, and signal signal2a corresponds to described camshaft signal signal2 plotted curve under normal circumstances i.e. curve ideally; Signal signal2b, corresponding to the curve detected, can find out, signal signal2b does not detect any pulse signal, therefore the situation corresponding to Fig. 7 is described without crankshaft signal fault.Judgement without camshaft signal fault realizes: if described crankshaft signal signal1 has received two work cycle namely correspond to crankshaft rotating 4 circle, now also do not accept any effective edge edge of described camshaft signal signal2, then now can judge to there occurs without crankshaft signal fault.
As shown in Figure 9, be the schematic diagram without camshaft signal abnormal failure of the embodiment of the present invention; Described camshaft signal abnormal failure correspond to described CMPS Camshaft Position Sensor 5 detect described camshaft signal signal2 and described in there is the situation deviating from set identification window in the hopping edge of described camshaft signal signal2 detected.The described crankshaft signal signal1 of hypothesis in Fig. 9 is correct, and signal signal2a corresponds to described camshaft signal signal2 plotted curve under normal circumstances i.e. curve ideally; Signal signal2c is corresponding to the curve detected, at each edge of signal signal2a and rising edge or trailing edge, all be set with an actual edge detected and depart from scope relative to desirable edge, this is departed from scope and is accurately located by described crankshaft signal signal1, as the region 15 in Fig. 9 illustrates the window that depart from scope of edge relative to desirable edge of actual detection, the scope departing from ideal edge as actual edge is the tooth rim phase of crankshaft signal signal1 as described in ± 5.The judgement of described camshaft signal abnormal failure: after described crankshaft signal signal1 completes and synchronously namely finds hypodontia and described first canine tooth to lack, now engine location is determined; Ideal curve and the signal signal2a of corresponding described camshaft signal signal2 are known, according to the angle information accurately that described crankshaft signal signal1 provides, set up the window that depart from scope of the actual edge detected relative to desirable edge in each edge of signal signal2a; If in the passage of described camshaft signal signal2 and eTPU [1] passage, all described camshaft signal signal2 edges can be read then think that described camshaft signal signal2 is normal opening up in window; If capture the hopping edge of described camshaft signal signal2, but some hopping edge in window does not capture, as marked edge corresponding to 16 just beyond the window ranges of correspondence, other is as marked edge corresponding to 17 then all in the window ranges of correspondence, at this moment think that described camshaft signal signal2 is wrong, namely occurred without camshaft signal abnormal failure.
Described limp-home and synchronous logic puocessing module 12 are for carrying out described motor synchronous and sentencing cylinder:
When described crankshaft position sensor 2 and described CMPS Camshaft Position Sensor 5 are all normal, described limp-home and synchronous logic puocessing module 12 are carried out Fast synchronization according to described crankshaft signal signal1 and described camshaft signal signal2 and are sentenced cylinder, described in a work cycle of described motor, crankshaft rotating two is enclosed, described camshaft revolves and turns around, the synchronous of described motor and position information is determined by the level of described first low level pulse in described crankshaft signal signal1 and described camshaft signal signal2 corresponding to described first low level pulse position, realize the synchronous of described motor and sentence cylinder.As shown in Figure 10, be the embodiment of the present invention motor Fast synchronization and sentence the synchronous flow chart of cylinder; As shown in Figure 3, be the logic diagram of engine synchronization of the embodiment of the present invention; The Fast synchronization of the motor of the embodiment of the present invention with the process sentencing cylinder is:
Engine synchronization comprises 3 states, and 0 represents outage state, and now bent axle and camshaft-signal sensor all do not export any signal; According to the above description, in engine starting process, first after the time filtering in the crankshaft signal detection of step 901 and the process of described crankshaft signal signal1 and identification and tooth filtering, the effective described crankshaft signal signal1 edge recognized, now think that but motor has started to rotate not yet identified and confirm the position of motor, sync state is updated to 1; Motor continues to run, bent axle is rotated further, the stage can be found through step 902 hypodontia cognitive phase and described hypodontia, after hypodontia i.e. first canine tooth of bent axle lacks, described crankshaft signal signal1 can form described first low level pulse, tractor crankshaft logical foundation ABa verification can recognize hypodontia information i.e. the first low level pulse, and now the crank position of motor is determined.Owing to having two hypodontia information in a cycle of engine, need to determine specifically which hypodontia could realize the location success of real meaning; Step 903 for this reason, at hypodontia place by reading the level state of the described camshaft signal signal2 of the correspondence of now camshaft, region 18 is the window of the level state reading described camshaft signal signal2.The described camshaft signal signal2 level state at two hypodontia places corresponding due to 3 finger cam axles is different, so now can directly draw position information accurately according to reading the high or low of described camshaft signal signal2 level state, now sync state is updated to 2, motor is in synchronize fully state, so far completes step 904.Now can provide accurate tooth information and circulation tooth information, current engine cylinder number also can be determined simultaneously; Angle clock upgrades the angle clock timing factor, i.e. content in step 905 after activating also the edge of each tooth again.
Fig. 3 is synchronous logic schematic diagram, in Fig. 3 in start-up point, the initial position of sync state=1, the initial position place of sync state=2 all mark with arrow.Because crankshaft signal recognition process needs time filtering and tooth filtering operation; if therefore last time engine stop position from edentulous site very close to; first hypodontia i.e. described first hypodontia of first bent axle circulation may be have passed through after completing these filtering operations; now engine synchronization needs next hypodontia just can complete, and is this situation as shown in Figure 5.If resting position has enough numbers of teeth from hypodontia, this synchronization scenario can complete in the circulation of bent axle sentences cylinder and synchronous, is this situation as shown in Figure 4, all represents 3 states that is 0,1,2 with status curve in Fig. 4 and Fig. 5.To sum up, in the engine synchronization process of the embodiment of the present invention, complete synchronously whole in a cycle of engine i.e. two bent axle circulations under normal circumstances at bent axle and camshaft signal and sentence cylinder working.
When described crankshaft position sensor 2 has fault, described CMPS Camshaft Position Sensor 5 normal, described limp-home is carried out synchronous with synchronous logic puocessing module 12 according to described camshaft signal signal2 and is sentenced cylinder, export the synchronous and position information required for described engine control, realize only there is being the limp-home function under described camshaft signal signal2 state.Only carry out synchronously as follows with the process sentencing cylinder according to described camshaft signal signal2:
When occurring without crankshaft signal fault, crank channel is without any signal, determine to need completing of described camshaft signal signal2 synchronous to realize engine location, after recognizing the described camshaft signal signal2 of camshaft, start the time calculated between two hopping edges of described camshaft signal signal2, and utilize the time between each hopping edge to complete the synchronizing process only adopting described camshaft signal signal2: as shown in figure 12, only adopting camshaft signal to carry out synchronously and sentencing the schematic diagram of cylinder of the embodiment of the present invention, crankshaft signal signal1a is ideal curve, TDC1 and TDC2 corresponds to the top dead center in two circulations of bent axle, BTDC(Before TDC) 1 and before BTDC2 corresponds respectively to TDC1 and TDC2, ATDC(After TDC) 1 and after ATDC2 corresponds respectively to TDC1 and TDC2.Camshaft signal signal2 can be divided into 6 sections of regions by rising edge and trailing edge, number consecutively is Seg0, Seg1, Seg2, Seg3, Seg4, Seg5 from left to right, and corresponding central angle is respectively 90 ° of CA, 66 ° of CA, 24 ° of CA, 90 ° of CA, 66 ° of CA, 24 ° of CA, wherein minimum low level section is Seg2, minimum high level section is Seg5, their two times are all greater than at the section width of these two sections of both sides, therefore this cycle of two periods can be multiplied by 2 and the chip period of both sides compare, if 2 of a chip period times are still less than two adjacent chip period of front and back, they are exactly comparatively minor cycle fragment Seg2 and Seg5, and then it is different according to their level states of two, this two fragments can be distinguished again, so only rely on camshaft signal signal2 just can complete position judgment work, namely engine location is determined by camshaft signal signal2.
Achieving after camshaft signal signal2 determines engine location, camshaft signal signal2 is also needed to provide position information just accurately can control motor; When motor is located successfully, the fragment position of each camshaft signal signal2 is known, and now each fragment angular duration is also known, and the ratio accounting for whole cam cycle 360 degree according to physics profile of tooth can draw, angle as shown in figure 12; Can determine to show camshaft has turned over how many angles when arriving at each camshaft signal signal2 edge, and then extrapolate bent axle rotating disk and turn over how many angles; Also the rotating speed of motor can be calculated according to above information.When using eTPU unit as engine control, all control position information is provided by angle clock TCR2.And the source of default situations lower angle clock is crank channel eTPU [0] the i.e. passage of described crankshaft signal signal1, angle clock adds up the timing factor and TRR exists in TRR register, this value obtains divided by 100 in each crank teeth cycle, i.e. the angle precision of 0.06 degree.When there is no crankshaft signal, angle clock source TCRCLK is needed to be switched on cam shaft passage and eTPU [1], but the edge due to camshaft signal signal2 is not fixed width, so need when the calculating angle clock timing factor ratio considering each segment width.Concrete way is, after each edge is caught, obtains the endurance of this section of fragment, calculates for 6 crank angle degrees endurance, i.e. the time in a crank teeth cycle by the angular duration of this fragment; Carry out virtual tooth interruption, then just can to obtain the value of angle clock count factor TRR divided by 100 according to this time, thus realize using camshaft signal signal2 to provide the TCR2 of the angle clock needed for a control position.
When normal, the described CMPS Camshaft Position Sensor 5 of described crankshaft position sensor 2 has fault, described limp-home and synchronous logic puocessing module 12 according to described crankshaft signal signal1 and carry out examination spray realize synchronous and sentence cylinder, export the synchronous and position information required for described engine control, realize only there is being the limp-home function under described crankshaft signal signal1 state.When normal, the described CMPS Camshaft Position Sensor 5 of described crankshaft position sensor 2 has fault, described limp-home and synchronous logic puocessing module 12 are carried out synchronous according to described crankshaft signal signal1 and to sentence the process of cylinder as follows:
Camshaft signal signal2 synchronously sentences in cylinder process whole the effect serving the hypodontia distinguishing described crankshaft signal signal1, if so there occurs the fault of camshaft signal inefficacy, in start-up course, hypodontia can not normally be distinguished; The way of now employing examination spray is come synchronous: first, when the hypodontia finding described crankshaft signal signal1, and complete synchronous according to described camshaft signal signal2 place level state determination edentulous site, note, now due to the incredible words of described camshaft signal signal2, the judgement of hypodontia may be lost efficacy; If confirm camshaft signal fault after crank rotation two encloses, now by examination spray flag set.After examination spray flag set, enter examination spray to detect, carry out first time at a described first low level pulse place of described crankshaft signal signal1 and try spray, if in the periodicity of the described crankshaft signal signal1 of setting, the rotating speed of described motor reaches setting value after described first time examination spray, the examination spray of described first time to sentence cylinder result correct, be preferably, described limp-home is carried out synchronous with synchronous logic puocessing module 12 according to described crankshaft signal signal1 and is sentenced in cylinder, when after the examination spray of described first time, in the periodicity of 4 described crankshaft signal signal1, the rotating speed of described motor reaches 400rpm described first time examination spray to sentence cylinder result correct, if in the periodicity of the described crankshaft signal signal1 of setting, the rotating speed of described motor does not reach setting value after described first time examination spray, then prove that now motor is still in the dragging stage, also prove that examination spray is wrong, the i.e. phase 360 degree of real phase place and judgement, at this moment the angle clock of examination spray is needed to increase by 360 degree, the cylinder result of sentencing of described first time examination spray is overturn and obtains correct sentencing cylinder result, now cylinder number also changes correct cylinder number into, at this moment needs to carry out second time and tries spray.If after described second time examination spray in the periodicity of the described crankshaft signal signal1 of setting the rotating speed of described motor reach setting value, described second time examination spray to sentence cylinder result correct.Cause motor to flood cylinder phenomenon to prevent repeatedly trying spray, if rotating speed does not reach predetermined after second time examination spray, still do not reach desired speed simultaneously after phase place being adjusted and then forbid examination spray, motor is shut down.
When described crankshaft position sensor 2 has fault and described CMPS Camshaft Position Sensor 5 to have a fault, described limp-home and synchronous logic puocessing module 12 forbid carrying out sentencing cylinder working, and remove after described motor is shut down and forbid.
The management method of embodiment of the present invention engine location management system adopts following steps to determine the position of described motor:
The crank rotation of described motor also drives described crankshaft signal dish 1 to rotate, and described crankshaft position sensor 2 lacks described first double wedge 1a and described first tooth and detects and form described crankshaft signal signal1.
The cam axle of described motor also drives described camshaft signal disk 4 to rotate, and the speed of described cam axle is the half of the speed of described crank rotation.
Described crankshaft signal puocessing module 8 is to described crankshaft signal signal1 process and identify.
Described camshaft signal puocessing module 10 is to described camshaft signal signal2 process.
Described crankshaft fault diagnostic module 9 judges that whether described crankshaft position sensor 2 is normal, is input in described limp-home and synchronous logic puocessing module 12 when described crankshaft position sensor 2 is normal by described crankshaft signal signal1; When described crankshaft position sensor 2 has fault, described crankshaft signal signal1 is not input in described limp-home and synchronous logic puocessing module 12.
Described camshaft fault diagnosis module 11 judges that whether described CMPS Camshaft Position Sensor 5 is normal, is input in described limp-home and synchronous logic puocessing module 12 when described CMPS Camshaft Position Sensor 5 is normal by described camshaft signal signal2; When described CMPS Camshaft Position Sensor 5 has fault, described camshaft signal signal2 is not input in described limp-home and synchronous logic puocessing module 12.
Described limp-home is carried out synchronous with synchronous logic puocessing module 12 to described motor and is sentenced cylinder:
When described crankshaft position sensor 2 and described CMPS Camshaft Position Sensor 5 are all normal, described limp-home and synchronous logic puocessing module 12 are carried out Fast synchronization according to described crankshaft signal signal1 and described camshaft signal signal2 and are sentenced cylinder, described in a work cycle of described motor, crankshaft rotating two is enclosed, described camshaft revolves and turns around, the synchronous of described motor is realized by described first low level pulse found in described crankshaft signal signal1, undertaken sentencing cylinder by the level reading described camshaft signal signal2 corresponding to described first low level pulse place in described crankshaft signal signal1 thus determine the synchronous of described motor and position information, realize the synchronous of described motor and sentence cylinder.As shown in Figure 10, be the embodiment of the present invention motor Fast synchronization and sentence the synchronous flow chart of cylinder; As shown in Figure 3, be the logic diagram of engine synchronization of the embodiment of the present invention; The Fast synchronization of the motor of the embodiment of the present invention with the process sentencing cylinder is:
Engine synchronization comprises 3 states, and 0 represents outage state, and now bent axle and camshaft-signal sensor all do not export any signal; According to the above description, in engine starting process, first after the time filtering in the crankshaft signal detection of step 901 and the process of described crankshaft signal signal1 and identification and tooth filtering, the effective described crankshaft signal signal1 edge recognized, now think that but motor has started to rotate not yet identified and confirm the position of motor, sync state is updated to 1; Motor continues to run, bent axle is rotated further, the stage can be found through step 902 hypodontia cognitive phase and described hypodontia, after hypodontia i.e. first canine tooth of bent axle lacks, described crankshaft signal signal1 can form described first low level pulse, tractor crankshaft logical foundation ABa verification can recognize hypodontia information i.e. the first low level pulse, and now the crank position of motor is determined.Owing to having two hypodontia information in a cycle of engine, need to determine specifically which hypodontia could realize the location success of real meaning; Step 903 for this reason, at hypodontia place by reading the level state of the described camshaft signal signal2 of the correspondence of now camshaft, region 18 is the window of the level state reading described camshaft signal signal2.The described camshaft signal signal2 level state at two hypodontia places corresponding due to 3 finger cam axles is different, so now can directly draw position information accurately according to reading the high or low of described camshaft signal signal2 level state, now sync state is updated to 2, motor is in synchronize fully state, so far completes step 904.Now can provide accurate tooth information and circulation tooth information, current engine cylinder number also can be determined simultaneously; Angle clock upgrades the angle clock timing factor, i.e. content in step 905 after activating also the edge of each tooth again.
When described crankshaft position sensor 2 has fault, described CMPS Camshaft Position Sensor 5 normal, described limp-home is carried out synchronous with synchronous logic puocessing module 12 according to described camshaft signal signal2 and is sentenced cylinder, export the synchronous and position information required for described engine control, realize only there is being the limp-home function under described camshaft signal signal2 state.
When normal, the described CMPS Camshaft Position Sensor 5 of described crankshaft position sensor 2 has fault, described limp-home and synchronous logic puocessing module 12 according to described crankshaft signal signal1 and carry out examination spray realize synchronous and sentence cylinder, export the synchronous and position information required for described engine control, realize only there is being the limp-home function under described crankshaft signal signal1 state.
When described crankshaft position sensor 2 has fault and described CMPS Camshaft Position Sensor 5 to have a fault, described limp-home and synchronous logic puocessing module 12 forbid carrying out sentencing cylinder working, and remove after described motor is shut down and forbid.
As shown in figure 11, be embodiment of the present invention Troubleshooting Flowchart; Embodiment of the present invention fault diagnosis flow scheme comprises:
The initialization of step 1001 March axis channel, namely enters the state preparing to accept crankshaft signal signal1 after crank channel eTPU [0] initialization completes; Step 1002 carries out cam shaft passage initialization, namely enters the state preparing to accept camshaft signal signal2 after cam shaft passage eTPU [1] initialization completes; According to configuration, crank channel eTPU [0] is ready to accept the decline hopping edge from crankshaft-signal sensor; Cam shaft passage eTPU [1] is ready to accept the rising from camshaft signal sensor and decline hopping edge; Two passages have and independently accept interrupt processing.
Judgement without crankshaft fault realizes: if received 6 edges of camshaft signal sensor at cam shaft passage eTPU [1], comprise 3 rising edges and 3 trailing edges; Now in the effective Edge check of the bent axle of step 1003, the receive path of crankshaft-signal sensor and crank channel eTPU [0] also do not receive the trailing edge of any crankshaft signal signal1, then now can judge to there occurs without crankshaft signal fault, by perform step 1016 without the set of crankshaft signal fault.As shown in Figure 6, be the schematic diagram without crankshaft signal fault of the embodiment of the present invention.
Without the judgement of camshaft fault, in the camshaft signal level and edge identification step of step 7, if crankshaft signal signal1 receives two work cycle, through step 1007, cam shaft passage eTPU [1] does not also get the edge of any effective camshaft signal signal2, now can judge to there occurs without camshaft signal fault, after the judgement that the camshaft edge of step 1008 occurs, execution step 1025 be carried out set to the diagnostic trouble code without camshaft signal fault.As shown in Figure 7, be the schematic diagram without camshaft signal fault of the embodiment of the present invention.
Crankshaft signal fault judges: crankshaft signal signal1 has two kinds of error situations, and hypodontia is abnormal and the number of teeth is abnormal.As shown in Figure 8, when the hypodontia place of bent axle is not 3 times of tooth rim phases tooth rim phase, this mistake corresponds to the mistake in region corresponding to square frame 14, in this region in described first low level pulse many high level pulses corresponding to described first double wedge, the ABa checking treatment in crankshaft signal recognition process cannot normally complete; In this case, perform step 1004, start to record hypodontia confirmed before the number of teeth, if counting reaches 120 teeth, i.e. two bent axle work cycle, now then think the condition reaching step 1005, perform step 1017, the set of bent axle hypodontia fault.If when bent axle hypodontia is normal, carry out step 1006, namely hypodontia has confirmed, completes synchronous after recognizing hypodontia.The tooth of identification can be caused number more than orthodont situation if crankshaft signal signal1 introduces clutter, or the crankshaft signal signal1 number of teeth can be caused to reduce due to the abnormal disappearance of signal panel physics tooth, this two classes fault hypodontia verification i.e. ABa verification all normally still actual signal be extremely, step 1011 is to identify above exception, the tooth number of specific practice corresponding to first high level pulse after bent axle hypodontia namely after described first low level pulse is 1, because high level pulse is produced by the first double wedge 1a, high level pulse later corresponding to each first double wedge 1a can produce and once interrupts and make tooth number add 1, if at crankshaft signal under normal circumstances, after 58 teeth, namely tooth number is 58 tooth places, after AB inspection, finding to be still hypodontia, then think that bent axle is normal signal, 58 tooth place AB verify unsuccessfully else if, then be judged to be crank teeth fault, namely but there is hypodontia total number of teeth and be not equal to 60-2 in crankshaft signal.Above two kinds of situations are all abnormal crankshaft signal faults, after step 1012 judges, perform step 1017 by the set of crankshaft signal fault.
The judgement of camshaft fault: after step 1006 crank channel completes and synchronously namely finds hypodontia, now engine location is determined; The position that the theoretical edge of corresponding camshaft signal signal2 occurs is known.Perform the effective edge edge that step 1007 identifies camshaft signal signal2, according to the angle information accurately that crankshaft signal signal2 is supplied to, accept window to the region establishment that the theoretical edge of camshaft signal signal2 occurs, cam shaft passage and eTPU [1] accept the theoretical edge of camshaft signal signal2 in window; If cam shaft passage can read the edge of all camshaft signal signal2 opening up in window; Step 1009 judges normally, then think that camshaft signal signal2 is normal; In step 1008, capture the hopping edge of camshaft signal signal2, but some hopping edge in window does not capture, step 1009 then thinks camshaft signal signal2 mistake after judging, performs step 1026 by the set of camshaft fault code.Be camshaft signal trouble signal schematic diagram as shown in Figure 9.
When normal, the described CMPS Camshaft Position Sensor 5 of described crankshaft position sensor 2 has fault, described limp-home and synchronous logic puocessing module 12 are carried out synchronous according to described crankshaft signal signal1 and to sentence the process of cylinder as follows: camshaft signal signal2 synchronously sentences whole the effect serving in cylinder process and distinguish hypodontia, if so there occurs the fault of camshaft signal inefficacy, in start-up course, hypodontia can not normally be distinguished; Now perform step 1027, namely start when bent axle examination spray, come synchronous by the way of examination spray; When finding the hypodontia of crankshaft signal signal1, and complete synchronous according to camshaft signal signal2 place level state determination edentulous site, note, now due to the incredible words of camshaft signal signal2, the judgement of hypodontia may be lost efficacy; Camshaft signal fault is confirmed, now by examination spray flag set after crank rotation two encloses; After examination spray flag set, carry out examination spray and enter examination spray detection logic, namely after two complete cycle of engines, detect motor mean speed, if after rotating speed exceedes the judgement of setting value step 1028, think that motor examination spray is correct, examination is first sprayed into merit, now synchronously completes, be preferably, the setting value of rotating speed is 400rpm; If rotating speed does not exceed setting value, step 1028 judges not pass through, and now motor is still in the dragging stage, proves that examination spray is wrong, i.e. the phase 360 degree of real phase place and judgement; The skew 360 degree that the system performing step 1029 is as the criterion realizes the angle clock judged to increase by 360 degree, and now cylinder number also changes correct cylinder number into.If after this reach more than the rotating speed of setting after engine crankshaft drags two circles again, judged to be successfully completed synchronously by then trying spray by step 1030; Cause motor to flood cylinder phenomenon to prevent repeatedly trying spray, if rotating speed does not reach predetermined after second time examination spray, still do not reach desired speed simultaneously after phase place being adjusted and then forbid examination spray, perform step 1015, motor is shut down, and position information resets.
Only carry out synchronously as follows with the process sentencing cylinder according to described camshaft signal signal2: when occurring without crankshaft signal fault, crank channel is without any signal; Determine must need to adopt camshaft signal signal2 to come synchronously to realize engine location; After execution step 1018 recognizes camshaft signal signal2, start the time calculated between two hopping edges of camshaft signal signal2, perform step 1019, complete the synchronizing process only adopting camshaft signal signal2 to carry out; As shown in figure 12, camshaft signal signal2 can be divided into 6 sections of regions by rising edge and trailing edge to this synchronous concrete grammar, and number consecutively is Seg0, Seg1, Seg2, Seg3, Seg4, Seg5 from left to right; Wherein minimum low level section is Seg2 and minimum high level section is Seg5, their two times are all greater than at the section width of these two sections of both sides, therefore this cycle of two periods can be multiplied by 2 and the chip period of both sides compare, if 2 of a chip period times are still less than two adjacent chip period of front and back, they are exactly comparatively minor cycle fragment Seg2 and Seg5, and then different according to their level states of two, this two fragments can be distinguished again.So far camshaft signal signal2 is only relied on just to complete the judgement that namely position judgment work complete step 1020.Achieve after camshaft signal signal2 determines engine location, also need camshaft signal signal2 to provide position information just accurately can control motor; Locate successfully when employing camshaft signal signal2 carries out motor, the fragment position of each camshaft signal signal2 is known, now each fragment angular duration is also known, and the ratio accounting for whole cam cycle 360 degree according to physics profile of tooth can draw; Can determine to show camshaft has turned over how many angles when arriving at the edge of each camshaft signal signal2, and then extrapolate bent axle rotating disk and turn over how many angles; Also the rotating speed of motor can be calculated according to above information.When using eTPU unit as engine control, all control position information is provided by angle clock TCR2.And the source of default situations lower angle clock is crank channel eTPU [0], it is exist in TRR register that angle clock adds up the timing factor, and this value obtains divided by 100 in each crank teeth cycle, i.e. the angle precision of 0.06 degree.When there is no crankshaft signal signal1, angle clock source TCRCLK is needed to be switched in cam shaft passage, but the edge due to camshaft signal signal2 is not fixed width, so need when the calculating angle clock timing factor ratio considering each segment width.Concrete way is, after each edge of camshaft signal signal2 is caught, obtains the endurance of this section of fragment, calculates for 6 crank angle degrees endurance by the angular duration of this fragment, i.e. the time of the tooth rim phase of a crankshaft signal signal1; Perform step 1022 and carry out virtual tooth interruption, then just can to obtain the value of angle clock count factor TRR divided by 100 according to this time, use camshaft to provide angle clock TCR2 needed for a control, achieve the content in step 1023.As seen from Figure 11, after step 1020 judges failure, carry out step 1024, i.e. synchronization failure, carry out step 1015 afterwards, motor is shut down and position information resets.After step 1023, step 1012 and step 1028 are normal, normal working of engine, detects until the motor carrying out step 1013 is shut down, and carries out step 1014 and realize motor and shut down, carry out step 1015 again and realize position information and reset after step 1013.
Above by specific embodiment to invention has been detailed description, but these are not construed as limiting the invention.Without departing from the principles of the present invention, those skilled in the art also can make many distortion and improvement, and these also should be considered as protection scope of the present invention.
Claims (10)
1. an engine location management system, is characterized in that, comprising:
Crankshaft signal dish, on the bent axle being arranged on motor and with described crank rotation, the excircle of described crankshaft signal dish is formed with multiple first double wedge, form the first tooth between two adjacent described first double wedges to lack, described first tooth lack comprise first canine tooth lack and multiple first little tooth lack, the central angle of each described first double wedge is identical, the central angle that each described first little tooth lacks is all identical with the central angle of each described first double wedge, and the central angle that described first canine tooth lacks is 5 times of the central angle of 1 described first double wedge;
Crankshaft position sensor, for detecting at described crankshaft signal dish with lacking described first double wedge and described first tooth during described crank rotation and form crankshaft signal, described crankshaft signal is used to indicate crank angle information and the crank position information of described motor;
Camshaft signal disk, on the camshaft being arranged on described motor and with described cam axle, the excircle of described camshaft signal disk is formed with 3 the second double wedges, form the second tooth between two adjacent described second double wedges to lack, the central angle of each described second double wedge is different, and the central angle that each described second tooth lacks is also different;
CMPS Camshaft Position Sensor, for detecting at described camshaft signal disk with lacking described second double wedge and described second tooth during described crank rotation and form camshaft signal; Described camshaft signal is used to indicate the operation cycle position information of described motor;
ETPU control unit, described eTPU control unit comprises crankshaft signal puocessing module, crankshaft fault diagnostic module, camshaft signal puocessing module, camshaft fault diagnosis module, limp-home and synchronous logic puocessing module;
Described crankshaft signal puocessing module connects described crankshaft position sensor and receives described crankshaft signal, and described crankshaft signal puocessing module is used for processing described crankshaft signal and identifies the position information that each described first double wedge and each described first tooth lack, when described crankshaft position sensor is normal, described crankshaft signal after process is made up of low and high level, the position information of each described first double wedge corresponds to the high level pulse of described crankshaft signal, the position information that each described first tooth lacks corresponds to the low level pulse of described crankshaft signal, the each described low level pulse of described crankshaft signal and the described high level pulse of its rear adjacent form a tooth rim phase, the described low level pulse corresponding to position information making described first canine tooth lack is the first low level pulse, the tooth rim phase corresponding to described first low level pulse was the first tooth rim phase, the tooth rim phase corresponding to previous described low level pulse of described first low level pulse was the second tooth rim phase, the tooth rim phase corresponding to a rear described low level pulse of described first low level pulse was the 3rd tooth rim phase, the described first tooth rim phase be multiplied by one be less than the hypodontia checkout coefficient of 1 after be greater than described second tooth rim phase and described 3rd tooth rim phase respectively,
Described camshaft signal puocessing module connects described CMPS Camshaft Position Sensor and receives described camshaft signal, described camshaft signal puocessing module is used for processing described camshaft signal, when described CMPS Camshaft Position Sensor is normal, described camshaft signal after process is made up of low and high level, the position information of each described second double wedge corresponds to the high level pulse of described camshaft signal, and the position information that each described second tooth lacks corresponds to the low level pulse of described camshaft signal;
The input end of described crankshaft fault diagnostic module is connected with described crankshaft signal puocessing module, for judging that whether described crankshaft position sensor is normal, when described crankshaft position sensor is normal, described crankshaft signal is input in described limp-home and synchronous logic puocessing module by the output terminal of described crankshaft fault diagnostic module; When described crankshaft position sensor has a fault, described crankshaft signal is not input in described limp-home and synchronous logic puocessing module;
The input end of described camshaft fault diagnosis module is connected with described camshaft signal puocessing module, for judging that whether described CMPS Camshaft Position Sensor is normal, when described CMPS Camshaft Position Sensor is normal, described camshaft signal is input in described limp-home and synchronous logic puocessing module by the output terminal of described camshaft fault diagnosis module; When described CMPS Camshaft Position Sensor has a fault, described camshaft signal is not input in described limp-home and synchronous logic puocessing module;
Described limp-home and synchronous logic puocessing module are used for carrying out synchronous to described motor and sentencing cylinder:
When described crankshaft position sensor and described CMPS Camshaft Position Sensor are all normal, described limp-home and synchronous logic puocessing module are carried out Fast synchronization according to described crankshaft signal and described camshaft signal and are sentenced cylinder, crankshaft rotating two described in a work cycle of described motor is enclosed, described camshaft revolves and turns around, determine the synchronous of described motor and position information by the level of described camshaft signal corresponding to described first low level pulse in described crankshaft signal and described first low level pulse position, realize the synchronous of described motor and sentence cylinder;
When described crankshaft position sensor has fault, described CMPS Camshaft Position Sensor normal, described limp-home is carried out synchronous with synchronous logic puocessing module according to described camshaft signal and is sentenced cylinder, export the synchronous and position information required for described engine control, realize only there is being the limp-home function under described camshaft signal state;
When normal, the described CMPS Camshaft Position Sensor of described crankshaft position sensor has fault, described limp-home and synchronous logic puocessing module according to described crankshaft signal and carry out examination spray realize synchronous and sentence cylinder, export the synchronous and position information required for described engine control, realize only there is being the limp-home function under described crankshaft signal state;
When described crankshaft position sensor has fault and described CMPS Camshaft Position Sensor to have a fault, described limp-home and synchronous logic puocessing module forbid carrying out sentencing cylinder working, and remove after described motor is shut down and forbid.
2. engine location management system as claimed in claim 1, it is characterized in that: the number of described first double wedge on described crankshaft signal dish is 58, the number that described first little tooth lacks is 57, the central angle that each described first double wedge and each described first little tooth lack is all 3 degree, and the central angle that described first canine tooth lacks is 15 degree; In described crankshaft signal, described first little tooth lacks the angle of the tooth rim phase of the described high level pulse composition of corresponding low level pulse and its rear adjacent and corresponds to 6 degree, and described eTPU control unit provides precision to be the crank angle control information of 0.06 degree after carrying out frequency multiplication to described crankshaft signal.
3. engine location management system as claimed in claim 1, is characterized in that: described crankshaft signal puocessing module comprises the process of described crankshaft signal and identification:
The high-frequency noise that enable passage noise filtering function filters out described crankshaft signal is configured by eTPU passage;
Detect the change edge of described crankshaft signal after the power-up, the laggard line time filtering in first edge of described crankshaft signal detected, time filtering is do not read the described crankshaft signal in a period of time, detect the next hopping edge of described crankshaft signal after time set by transit time filtering again, then carry out tooth filtering;
Tooth filtering continues to detect described crankshaft signal, the corresponding tooth signal of signal of a described tooth rim phase, described tooth filtering is used for the described tooth target signal filter of some, after the described tooth signal capturing the quantity set by described tooth filtering, carry out hypodontia searching, described hypodontia is found and is used for determining described first low level pulse;
In the described hypodontia searching stage, window filtering will be carried out to each described tooth signal before finding described first canine tooth to lack corresponding described first low level pulse, namely all edges of each described tooth signal all should appear in window, and then ABa verification is carried out to each edge of each described tooth signal, verify if having passed described ABa, the described low level pulse corresponding to this tooth signal is that described first canine tooth lacks corresponding described first low level pulse; Described ABa is verified as: B corresponds to the tooth rim phase size corresponding to current described tooth signal, A corresponds to the tooth rim phase size corresponding to previous described tooth signal, a corresponds to the tooth rim phase size corresponding to a rear described tooth signal, judge that B is multiplied by a hypodontia checkout coefficient being less than 1 and whether is greater than A, judge that B is multiplied by a hypodontia checkout coefficient being less than 1 and whether is greater than a, if B is multiplied by a hypodontia checkout coefficient being less than 1 be greater than A and B respectively, then ABa verification is passed through; If B is multiplied by a hypodontia checkout coefficient being less than 1 be less than A or B, then ABa verification is not passed through.
4. engine location management system as claimed in claim 1, is characterized in that: the fault of described crankshaft position sensor comprises without crankshaft signal fault and crankshaft signal abnormal failure; Described without crankshaft signal fault correspond to described crankshaft position sensor do not detect described crankshaft signal; Described crankshaft signal abnormal failure correspond to described crankshaft position sensor detect described crankshaft signal and described in exist in the described crankshaft signal that detects and set each described first double wedge or each described first tooth lack not corresponding pulse.
5. engine location management system as claimed in claim 1, is characterized in that: the fault of described CMPS Camshaft Position Sensor comprises without camshaft signal fault and camshaft signal abnormal failure; Described without camshaft signal fault correspond to described CMPS Camshaft Position Sensor do not detect described camshaft signal; Described camshaft signal abnormal failure correspond to described CMPS Camshaft Position Sensor detect described camshaft signal and described in there is the situation deviating from set identification window in the hopping edge of described camshaft signal detected.
6. the engine location management system as described in claim 1 or 5, it is characterized in that: normal at described crankshaft position sensor, when described CMPS Camshaft Position Sensor has a fault, described limp-home is carried out synchronous with synchronous logic puocessing module according to described crankshaft signal and is sentenced cylinder, described in a work cycle of described motor, crankshaft rotating two is enclosed, described first low level pulse in described crankshaft signal occurs twice, carry out first time at a described first low level pulse place of described crankshaft signal and try spray, if in the periodicity of the described crankshaft signal of setting, the rotating speed of described motor reaches setting value after described first time examination spray, the examination spray of described first time to sentence cylinder result correct, if after the examination spray of described first time in the periodicity of the described crankshaft signal of setting the rotating speed of described motor do not reach setting value, the cylinder result of sentencing of described first time examination spray is overturn and obtains correct sentencing cylinder result.
7. engine location management system as claimed in claim 1, it is characterized in that: when described crankshaft signal is normal, described eTPU control unit adopts described crankshaft signal as clock source, provides angle clock information; When described engine start or when crankshaft signal breaks down described in described engine operation process, need to cut off described crankshaft signal as clock source, switch to and use described camshaft signal as clock source, angle clock information is provided.
8. the management method of engine location management system as claimed in claim 1, is characterized in that, adopts following steps to determine the position of described motor:
The crank rotation of described motor also drives described crankshaft signal dish to rotate, and described crankshaft position sensor lacks described first double wedge and described first tooth and detects and form described crankshaft signal;
The cam axle of described motor also drives described camshaft signal disk to rotate, and the speed of described cam axle is the half of the speed of described crank rotation;
Described crankshaft signal puocessing module processes described crankshaft signal and identifies;
Described camshaft signal puocessing module processes described camshaft signal;
Described crankshaft fault diagnostic module judges that whether described crankshaft position sensor is normal, is input to by described crankshaft signal in described limp-home and synchronous logic puocessing module when described crankshaft position sensor is normal; When described crankshaft position sensor has fault, described crankshaft signal is not input in described limp-home and synchronous logic puocessing module;
Described camshaft fault diagnosis module judges that whether described CMPS Camshaft Position Sensor is normal, is input to by described camshaft signal in described limp-home and synchronous logic puocessing module when described CMPS Camshaft Position Sensor is normal; When described CMPS Camshaft Position Sensor has fault, described camshaft signal is not input in described limp-home and synchronous logic puocessing module;
Described limp-home is carried out synchronous with synchronous logic puocessing module to described motor and is sentenced cylinder:
When described crankshaft position sensor and described CMPS Camshaft Position Sensor are all normal, described limp-home and synchronous logic puocessing module are carried out Fast synchronization according to described crankshaft signal and described camshaft signal and are sentenced cylinder, described in a work cycle of described motor, crankshaft rotating two is enclosed, described camshaft revolves and turns around, the synchronous of described motor is realized by described first low level pulse found in described crankshaft signal, undertaken sentencing cylinder by the level reading described camshaft signal corresponding to described first low level pulse place in described crankshaft signal thus determine the synchronous of described motor and position information, realize the synchronous of described motor and sentence cylinder,
When described crankshaft position sensor has fault, described CMPS Camshaft Position Sensor normal, described limp-home is carried out synchronous with synchronous logic puocessing module according to described camshaft signal and is sentenced cylinder, export the synchronous and position information required for described engine control, realize only there is being the limp-home function under described camshaft signal state;
When normal, the described CMPS Camshaft Position Sensor of described crankshaft position sensor has fault, described limp-home and synchronous logic puocessing module according to described crankshaft signal and carry out examination spray realize synchronous and sentence cylinder, export the synchronous and position information required for described engine control, realize only there is being the limp-home function under described crankshaft signal state;
When described crankshaft position sensor has fault and described CMPS Camshaft Position Sensor to have a fault, described limp-home and synchronous logic puocessing module forbid carrying out sentencing cylinder working, and remove after described motor is shut down and forbid.
9. method as claimed in claim 8, is characterized in that: described crankshaft signal puocessing module comprises the process of described crankshaft signal and identification:
The high-frequency noise that enable passage noise filtering function filters out described crankshaft signal is configured by eTPU passage;
Detect the change edge of described crankshaft signal after the power-up, the laggard line time filtering in first edge of described crankshaft signal detected, time filtering is do not read the described crankshaft signal in a period of time, detect the next hopping edge of described crankshaft signal after time set by transit time filtering again, then carry out tooth filtering;
Tooth filtering continues to detect described crankshaft signal, the corresponding tooth signal of signal of a described tooth rim phase, described tooth filtering is used for the described tooth target signal filter of some, after the described tooth signal capturing the quantity set by described tooth filtering, carry out hypodontia searching, described hypodontia is found and is used for determining described first low level pulse;
In the described hypodontia searching stage, window filtering will be carried out to each described tooth signal before finding described first canine tooth to lack corresponding described first low level pulse, namely all edges of each described tooth signal all should appear in window, and then ABa verification is carried out to each edge of each described tooth signal, verify if having passed described ABa, the described low level pulse corresponding to this tooth signal is that described first canine tooth lacks corresponding described first low level pulse; Described ABa is verified as: B corresponds to the tooth rim phase size corresponding to current described tooth signal, A corresponds to the tooth rim phase size corresponding to previous described tooth signal, a corresponds to the tooth rim phase size corresponding to a rear described tooth signal, judge that B is multiplied by a hypodontia checkout coefficient being less than 1 and whether is greater than A, judge that B is multiplied by a hypodontia checkout coefficient being less than 1 and whether is greater than a, if B is multiplied by a hypodontia checkout coefficient being less than 1 be greater than A and B respectively, then ABa verification is passed through; If B is multiplied by a hypodontia checkout coefficient being less than 1 be less than A or B, then ABa verification is not passed through.
10. method as claimed in claim 8, it is characterized in that: normal at described crankshaft position sensor, when described CMPS Camshaft Position Sensor has a fault, described limp-home is carried out synchronous with synchronous logic puocessing module according to described crankshaft signal and is sentenced cylinder, described in a work cycle of described motor, crankshaft rotating two is enclosed, described first low level pulse in described crankshaft signal occurs twice, carry out first time at a described first low level pulse place of described crankshaft signal and try spray, if in the periodicity of the described crankshaft signal of setting, the rotating speed of described motor reaches setting value after described first time examination spray, the examination spray of described first time to sentence cylinder result correct, if after the examination spray of described first time in the periodicity of the described crankshaft signal of setting the rotating speed of described motor do not reach setting value, the cylinder result of sentencing of described first time examination spray is overturn and obtains correct sentencing cylinder result.
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