CN104747309B

CN104747309B - engine position management system and management method

Info

Publication number: CN104747309B
Application number: CN201310732772.XA
Authority: CN
Inventors: 祁儒明; 刘翔; 盛旭威
Original assignee: Lianchuang Automotive Electronics Co Ltd
Current assignee: Lianchuang Automotive Electronics Co Ltd
Priority date: 2013-12-26
Filing date: 2013-12-26
Publication date: 2017-04-12
Anticipated expiration: 2033-12-26
Also published as: CN104747309A

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

Engine location management system and management method

Technical field

The present invention relates to engine, more particularly to a kind of engine location management system；The invention further relates to a kind of send out The management method of motivation location management system.

Background technology

Contemporary engine in order to improve its economy, stability and improve its emission performance, using advanced Electronic Control list Unit has become inexorable trend.The control stress point of engine is the mechanical location for being accurately quickly found out engine, electric-control system Control accuracy is heavily dependent on the accuracy and precision of engine running position.It is main by gathering simultaneously in the industry at present Crankshaft signal and camshaft signal, and the Main Means measured as engine location that two signal combinations are got up.Bent axle is believed Number it is to be read by crankshaft sensor, camshaft signal is read by camshaft-signal sensor.Crankshaft sensor includes peace It is mounted in a circular metal rotating disk of engine crankshaft tail end, and the magneto-electric that is fixedly mounted near rotating disk or Hall-type sensing Device.CMPS Camshaft Position Sensor is comprising a circular metal rotating disk installed in engine cam shaft end and is fixedly mounted on Magnetoelectricity or Hall element composition near it.Crankshaft sensor rotating disk edge is uniformly dispersed with some metal protuberances, goes Fall the hypodontia part defined after wherein particular protrusion on rotating disk.

When bent axle or camshaft-signal sensor break down, if can not effectively recognize after failure or identification failure not Can adopt an effective measure, engine will lose positional information and uncontrollable, gently then cause roadside breakdown, it is heavy then damage engine Even cause traffic accident.

The content of the invention

The technical problem to be solved is to provide a kind of engine location management system, can realize to engine Quickly sentence cylinder and synchronization, after synchronization high-precision Angle ambiguity information can be provided；Can be accurate during sensor failure in position Judge the fault type of each sensor；Cylinder can be sentenced using the realization of another sensor in the case of a certain sensor fault simultaneously same The angle information of finite accuracy is walked and provided, the limp-home of engine is realized.For this purpose, the present invention also provides one kind starts seat in the plane Put the management method of management system.

To solve above-mentioned technical problem, the engine location management system that the present invention is provided includes：

Crankshaft signal disk, is arranged on the bent axle of engine and with the crank rotation, the crankshaft signal disk it is cylindrical It is formed with multiple first double wedges week, the first tooth is formed between two adjacent first double wedges and is lacked, first tooth lacks and includes One the first canine tooth lacks and the multiple first little teeth lack, and the central angle of each first double wedge is identical, what each first little tooth lacked Central angle is all identical with the central angle of each first double wedge, and the scarce central angle of first canine tooth is 1 first double wedge 5 times of central angle.

Crankshaft position sensor, for when the crankshaft signal disk is with the crank rotation to first double wedge and institute State the first tooth and lack and detected and formed crankshaft signal, the crankshaft signal is used to indicate the crank angle information of the engine And crankshaft position information.

Camshaft signal disk, is arranged on the camshaft of the engine and with the cam axle, the camshaft The excircle of signal panels is formed with 3 the second double wedges, the second tooth is formed between two adjacent second double wedges and is lacked, each described The central angle of the second double wedge is different, and the scarce central angle of each second tooth is also different.

CMPS Camshaft Position Sensor, for when the camshaft signal disk is with the crank rotation to second double wedge Lack with second tooth and detected and formed camshaft signal；The camshaft signal is used to indicate the operating of the engine Circulation position information.

Enhancement mode Time Processing Unit（eTPU）Control unit, the eTPU control units include that crankshaft signal processes mould Block, crankshaft fault diagnostic module, camshaft signal processing module, camshaft fault diagnosis module, limp-home and synchronous logic Processing module.

The crankshaft signal processing module connects the crankshaft position sensor and receives the crankshaft signal, the bent axle Signal processing module is used to processing the crankshaft signal and being identified that each first double wedge and each first tooth lack Positional information；When the crankshaft position sensor is normal, the crankshaft signal after process is made up of low and high level, each described The positional information of the first double wedge is corresponding to the high level pulse of the crankshaft signal, the positional information correspondence that each first tooth lacks In the low level pulse of the crankshaft signal, each described low level pulse of the crankshaft signal and the height adjacent behind Level pulse constitutes a tooth rim phase, makes the low level pulse corresponding to the scarce positional information of first canine tooth be first Low level pulse, the tooth rim phase corresponding to first low level pulse was the first tooth rim phase, first low level pulse The tooth rim phase corresponding to the previous low level pulse was the second tooth rim phase, and latter of first low level pulse is described The tooth rim phase corresponding to low level pulse was the 3rd tooth rim phase, and the first tooth rim phase is multiplied by a hypodontia verification system less than 1 The second tooth rim phase and the 3rd tooth rim phase are respectively greater than after number.

The camshaft signal processing module connects the CMPS Camshaft Position Sensor and receives the camshaft signal, institute Camshaft signal processing module is stated for processing the camshaft signal, when the CMPS Camshaft Position Sensor is normal, The camshaft signal after process is made up of low and high level, and the positional information of each second double wedge corresponds to the camshaft The high level pulse of signal, low level pulse of the scarce positional information of each second tooth corresponding to the camshaft signal.

The input of the crankshaft fault diagnostic module is connected with the crankshaft signal processing module, described for judging Whether crankshaft position sensor is normal, when the crankshaft position sensor is normal, the output end of the crankshaft fault diagnostic module During the crankshaft signal is input to into the limp-home and synchronous logic processing module；The crankshaft position sensor is faulty When, the crankshaft signal is not input in the limp-home and synchronous logic processing module.

The input of the camshaft fault diagnosis module is connected with the camshaft signal processing module, for judging Whether the CMPS Camshaft Position Sensor is normal, when the CMPS Camshaft Position Sensor is normal, the camshaft fault diagnosis mould During the camshaft signal is input to the limp-home and synchronous logic processing module by the output end of block；The cam axle position Put sensor it is faulty when, the camshaft signal is not input in the limp-home and synchronous logic processing module.

The limp-home is used to synchronizing the engine and sentencing cylinder with synchronous logic processing module：

In the crankshaft position sensor and all normal CMPS Camshaft Position Sensor, the limp-home with it is synchronous Logic processing module carries out Fast synchronization and sentences cylinder according to the crankshaft signal and the camshaft signal, and the one of the engine The rotation of bent axle described in individual working cycles takes two turns, camshaft rotation is turned around, by the crankshaft signal in it is described first low The level of the corresponding camshaft signal determines the engine at level pulse and the first low level pulse position Synchronization and positional information, realize the synchronization of the engine and sentence cylinder.

The crankshaft position sensor it is faulty, the CMPS Camshaft Position Sensor is normal when, the limp-home with Synchronous logic processing module synchronizes and sentences cylinder according to the camshaft signal, exports same required for the engine control Step and positional information, realize the limp-home function under only described camshaft signal state.

The crankshaft position sensor it is normal, the CMPS Camshaft Position Sensor is faulty when, the limp-home with Synchronous logic processing module is according to the crankshaft signal and carries out examination spray realization synchronously and sentences cylinder, exports the engine and controls institute The synchronization of needs and positional information, realize the limp-home function under only described crankshaft signal state.

When the faulty and described CMPS Camshaft Position Sensor of the crankshaft position sensor is all faulty, the limping is returned Family forbids carrying out sentencing cylinder working with synchronous logic processing module, and releases after the engine is shut down and forbid.

Further improvement is that the number of first double wedge on the crankshaft signal disk is 58, and described first is little The scarce number of tooth is 57, and the scarce central angle of each first double wedge and each first little tooth is all 3 degree, first canine tooth Scarce central angle is 15 degree；First little tooth lacks corresponding low level pulse and behind phase in the crankshaft signal The angle of the tooth rim phase of adjacent high level pulse composition corresponds to 6 degree, and the eTPU control units are to the crankshaft signal Carry out providing the crank angle control information that precision is 0.06 degree after frequency multiplication.

Further improvement is that process and identification of the crankshaft signal processing module to the crankshaft signal includes：

Configured by eTPU passages and enable the high-frequency noise that channel noise filter function filters out the crankshaft signal.

The change edge of the crankshaft signal is detected after the power-up, when carrying out behind first edge for detecting the crankshaft signal Between filter, time filtering is that the crankshaft signal in a period of time is not read, after the elapsed time filtering set time The next hopping edge of the crankshaft signal is detected again, then carries out tooth number filtering.

Tooth number filtering continues to detect the crankshaft signal, first little tooth lack corresponding low level pulse and its Tooth rim phase one tooth signal of correspondence that high level pulse corresponding to adjacent first double wedge is constituted, the tooth number Filter for by a number of tooth target signal filter, when the tooth letter for capturing the set quantity of the tooth number filtering Number hypodontia searching is carried out later, the hypodontia is found for determining first low level pulse.

Further improvement is that the hypodontia checkout coefficient is 0.5.

Further improvement be, the failure of the crankshaft position sensor includes different without crankshaft signal failure and crankshaft signal Normal failure；It is described not detect the crankshaft signal corresponding to the crankshaft position sensor without crankshaft signal failure；It is described Crankshaft signal abnormal failure corresponding to the crankshaft position sensor detect the crankshaft signal and it is described detect it is described Exist to lack with set each described first double wedge or each first tooth in crankshaft signal and be not correspond to pulse.

Further improvement is that the failure of the CMPS Camshaft Position Sensor is included without camshaft signal failure and camshaft Abnormal signal failure；It is described not detect the cam corresponding to the CMPS Camshaft Position Sensor without camshaft signal failure Axis signal；The camshaft signal abnormal failure corresponding to the CMPS Camshaft Position Sensor detect the camshaft signal, And presence deviates from the situation of set identification window in the hopping edge of the camshaft signal for detecting.

Further improvement be, the crankshaft position sensor it is normal, the CMPS Camshaft Position Sensor is faulty when, The limp-home synchronizes and sentences cylinder with synchronous logic processing module according to the crankshaft signal, the one of the engine The rotation of bent axle described in individual working cycles takes two turns, first low level pulse in the crankshaft signal occurs twice, in institute Stating carries out examination spray for the first time at first low level pulse of crankshaft signal, if in setting after the first time examination spray The crankshaft signal periodicity in the rotating speed of the engine reach setting value, the first time examination spray is sentencing cylinder result just Really；If the rotating speed of the engine is not reaching in the periodicity of the crankshaft signal of setting after the first time examination spray Setting value, trying the first time cylinder result of sentencing of spray carries out upset and is correctly sentenced cylinder result.

Further improvement be, the crankshaft position sensor it is normal, the CMPS Camshaft Position Sensor is faulty when, The limp-home is synchronized according to the crankshaft signal and sentenced in cylinder with synchronous logic processing module, the first time examination spray The first time examination spray sentences cylinder when afterwards the rotating speed of the engine reaches 400rpm in the periodicity of 4 crankshaft signals As a result it is correct；The rotating speed of the engine is not up in the periodicity of 4 crankshaft signals after the first time examination spray The cylinder result of sentencing of spray is tried the first time during 400rpm to be carried out upset and is correctly sentenced cylinder result.

Further improvement is, when the crankshaft signal is normal, the eTPU control units adopt the crankshaft signal As clock source, there is provided angle clock information；It is bent when the engine start or described in the engine operation process When axis signal breaks down, need to cut off the crankshaft signal as clock source, switch to using the camshaft signal as Clock source, there is provided angle clock information.

To solve above-mentioned technical problem, the management method of the engine location management system that the present invention is provided is using following step Suddenly the position of the engine is determined：

The crank rotation of the engine simultaneously drives the crankshaft signal disk to rotate, and the crankshaft position sensor is to described First double wedge and first tooth lack and are detected and formed the crankshaft signal.

The cam axle of the engine simultaneously drives the camshaft signal disk to rotate, the speed of the cam axle For the half of the speed of the crank rotation.

The crankshaft signal processing module is processed and recognized to the crankshaft signal.

The camshaft signal processing module is processed the camshaft signal.

The crankshaft fault diagnostic module judges whether the crankshaft position sensor is normal, in crank position sensing During the crankshaft signal is input to into the limp-home and synchronous logic processing module when device is normal；Pass in the crank position When sensor is faulty, the crankshaft signal is not input in the limp-home and synchronous logic processing module.

The camshaft fault diagnosis module judges whether the CMPS Camshaft Position Sensor is normal, in the cam axle position Put sensor it is normal when the camshaft signal is input in the limp-home and synchronous logic processing module；Described convex When wheel shaft position sensor is faulty, the camshaft signal is not input to the limp-home and synchronous logic processing module In.

The limp-home synchronizes and sentences cylinder with synchronous logic processing module to the engine：

In the crankshaft position sensor and all normal CMPS Camshaft Position Sensor, the limp-home with it is synchronous Logic processing module carries out Fast synchronization and sentences cylinder according to the crankshaft signal and the camshaft signal, and the one of the engine The rotation of bent axle described in individual working cycles takes two turns, camshaft rotation is turned around, described in the searching crankshaft signal First low level pulse realizes the synchronization of the engine, by first low level pulse in the reading crankshaft signal Locating the level of the corresponding camshaft signal carries out sentencing cylinder synchronization and positional information so that it is determined that the engine, real Show the synchronization of the engine and sentence cylinder.

In the hypodontia searching stage, before finding first canine tooth and lacking corresponding first low level pulse Window filtering will be carried out to tooth signal each described, i.e., all of edge of each tooth signal should all occur in window It is interior, then again ABa verifications are carried out to each edge of each tooth signal, if it is now i.e. described first big to have passed through verification Tooth lacks corresponding first low level pulse；The ABa is verified as：B is corresponding to the tooth corresponding to presently described tooth signal Cycle size, corresponding to the tooth rim phase size corresponding to the previous tooth signal, a is corresponding to the latter tooth signal institute for A Corresponding tooth rim phase size, judges that whether B is multiplied by a hypodontia checkout coefficient less than 1 more than A, judges that B is multiplied by one less than 1 Hypodontia checkout coefficient whether be more than a, if B is multiplied by a hypodontia checkout coefficient less than 1 and is respectively greater than A and B, ABa school Test and pass through；If B is multiplied by a hypodontia checkout coefficient less than 1 less than A or B, ABa verification does not pass through.

The present invention can realize quickly sentencing cylinder and synchronization to engine, and high-precision Angle ambiguity letter can be provided after synchronization Breath；The fault type of each sensor can be accurately judged during sensor failure in position；Simultaneously in a certain sensor fault In the case of another sensor can be utilized to realize sentencing cylinder synchronization and provide the angle information of finite accuracy, the limping for realizing engine is returned Family.

Description of the drawings

With reference to the accompanying drawings and detailed description 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 detection principle diagram of the crankshaft signal of the embodiment of the present invention；

Fig. 3 is the logic chart of the engine synchronization of the embodiment of the present invention；

Fig. 4 is signal Fig. 1 of the synchronous regime saltus step of the embodiment of the present invention；

Fig. 5 is signal Fig. 2 of the synchronous regime saltus step of the embodiment of the present invention；

Fig. 6 is the schematic diagram without crankshaft signal failure of the embodiment of the present invention；

Fig. 7 is the schematic diagram without camshaft signal failure 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 the schematic diagram that cylinder is synchronized and sentenced only with camshaft signal of the embodiment of the present invention.

Specific embodiment

As shown in figure 1, being the structural representation of embodiment of the present invention engine location management system；The embodiment of the present invention is sent out Motivation location management system includes：

Crankshaft signal disk 1, is arranged on the bent axle of engine and with the crank rotation, outside the crankshaft signal disk 1 Circumference is formed with multiple first double wedge 1a, the first tooth is formed between two adjacent the first double wedge 1a and is lacked, first tooth Lacking includes that first canine tooth lacks 1c and multiple first little teeth lack 1b, and the central angle of each first double wedge 1a is identical, each described The central angle that first little tooth lacks 1b is all identical with the central angle of each first double wedge 1a, and first canine tooth lacks the central angle of 1c For 5 times of the central angle of 1 the first double wedge 1a.Preferably, the first double wedge 1a's on the crankshaft signal disk 1 is individual Number is 58, and it is 57 that the first little tooth lacks the number of 1b, and each first double wedge 1a and each first little tooth lack 1b's Central angle is all 3 degree, and it is 15 degree that first canine tooth lacks the central angle of 1c.It is big by described the first of the crankshaft signal disk 1 Tooth lacks the top dead centre that 1c defines the cylinder of the engine（Top Dead Center, TDC）Dotted line 1d in position, such as Fig. 1 Shown position corresponds to TDC.TDC corresponds to the compression point position of cylinder, and a working cycles of engine include four punchings Journey, the bent axle can rotate 2 circles, and four strokes are respectively air inlet, compression, acting and are vented, wherein in compression and exhaust stroke Piston in cylinder can all reach top dead centre, therefore the piston in cylinder can twice reach top dead centre, be once exhaust, be once pressure Contracting.Each first double wedge 1a and each first little tooth lack the setting of 1b can realize that the accurate of the anglec of rotation of bent axle is determined Position.

Crankshaft position sensor 2, for when the crankshaft signal disk 1 is with the crank rotation to the first double wedge 1a Lack with first tooth and detected and formed crankshaft signal signal1, the crankshaft signal signal1 is used to indicate described sending out The crank angle information of motivation and crankshaft position information.One is constituted by the crankshaft signal disk 1 and the crankshaft position sensor 2 Set crankshaft sensor 3, wherein the crankshaft position sensor 2 can be magneto-electric or hall sensor.

Camshaft signal disk 4, is arranged on the camshaft of the engine and with the cam axle, the camshaft The excircle of signal panels 4 is formed with 3 the second double wedge 4a, the second tooth is formed between two adjacent the second double wedge 4a and is lacked 4b, the central angle of each second double wedge 4a is different, and the central angle that each second tooth lacks 4b is also different.It is described convex Connect generally by chain or belt between wheel shaft and the bent axle, gearratio is fixed as 2:1, a work of the engine The rotation of bent axle described in circulating takes two turns, camshaft rotation is turned around, and the circulation of so described camshaft is sent out with entirely described The cycle phase of the working cycles of motivation is same.The position as shown in the dotted line 4c in Fig. 1, the position is described second convex respectively through one Tooth 4a and second tooth lack 4b, so lacking 1c positions, the dotted line by first canine tooth of the crankshaft signal disk 1 The teeth of the second double wedge 4a or described second corresponding to 4c lack 4b positions can completely determine the described of the crankshaft signal disk 1 First canine tooth lacks the top dead centre that the TDC corresponding to 1c corresponds to be vented or compress, that is, realize sentencing cylinder, also can determine completely The position of engine；When engine has multiple cylinders, the phase place between adjacent cylinder is fixed, i.e., be staggered between adjacent cylinder One fixed angle, so the position of whole cylinders can accurately obtain.

CMPS Camshaft Position Sensor 5, for convex to described second when the camshaft signal disk 4 is with the crank rotation Tooth 4a and second tooth lack 4b and are detected and formed camshaft signal signal2；The camshaft signal signal2 is used for Indicate the operation cycle positional information of the engine.By 5 groups of the camshaft signal disk 4 and the CMPS Camshaft Position Sensor Into a set of camshaft-signal sensor 6, wherein the CMPS Camshaft Position Sensor 4 can be magneto-electric or hall sensor.

ETPU control units 7, the eTPU control units 7 include crankshaft signal processing module 8, crankshaft fault diagnostic module 9, camshaft signal processing module 10, camshaft fault diagnosis module 11, limp-home and synchronous logic processing module 12.

The crankshaft signal processing module 8 connects the crankshaft position sensor 2 and receives the crankshaft signal Signal1, is read by eTPU [0] passage.The crankshaft signal processing module 8 is used to enter the crankshaft signal signal1 Row processes and identifies the scarce positional information of each first double wedge 1a and each first tooth.As shown in figure 3, the bent axle position Put sensor 2 it is normal when, the crankshaft signal signal1 after process is made up of low and high level, each first double wedge 1a's Positional information corresponds to the high level pulse of the crankshaft signal signal1, and the scarce positional information of each first tooth is corresponded to The low level pulse of the crankshaft signal signal1；Cylinder is can be seen that from the diagram of the crankshaft signal signal1 of Fig. 3 1Cylinder1 and cylinder 2Cylinder2 corresponding to crankshaft signal two different cycles namely correspond respectively to the two of bent axle Individual continuous rotation circle, bent axle to rotate a circle and have 58 high level pulses in the corresponding crankshaft signal signal1, high It is low level pulse between level pulse, has the larger low electricity of 57 less low level pulses of pulse width and a width Flat pulse.The each described low level pulse of the crankshaft signal signal1 and high level pulse composition adjacent behind One tooth rim phase, the low level pulse that first canine tooth lacks corresponding to the positional information of 1c is made to be the first low level arteries and veins Punching, the tooth rim phase corresponding to first low level pulse be the first tooth rim phase, the previous institute of first low level pulse It was the second tooth rim phase to state tooth rim phase corresponding to low level pulse, the latter low level arteries and veins of first low level pulse The punching corresponding tooth rim phase was the 3rd tooth rim phase, and the first tooth rim phase is multiplied by after a hypodontia checkout coefficient less than 1 respectively More than the second tooth rim phase and the 3rd tooth rim phase.A first little tooth lacks 1b in the crankshaft signal signal1 Corresponding low level pulse and the angle of the tooth rim phase of high level pulse composition adjacent behind corresponds to 6 degree, institute Stating the crankshaft signal signal1 of eTPU control units 7 pairs carries out providing the crank angle control that precision is 0.06 degree after frequency multiplication Information.

Preferably, as shown in Fig. 2 being the detection principle diagram of the crankshaft signal of the embodiment of the present invention；In the embodiment of the present invention In the process identification process one of the whole crankshaft signal signal1 co-exist in 6 kinds of process and be respectively：Noise filtering process, when Between filtering process, tooth filtering process, windows detecting process, hypodontia detection process, rotating speed credibility detection process, respectively：

As shown in the step 102 in Fig. 2, channel noise filter function is enabled by the configuration of eTPU passages and filters out the song The high-frequency noise of axis signal signal1, namely the configuration of eTPU passages is realized by the configuration of register, high-frequency noise noise Can be removed.Because engine operating environments are extremely complex, have in vehicle circuitry startup motor, generator, various magnetic valves, after Appliance circuit element；They constantly produce in the course of the work the high-frequency electromagnetic interference of complexity.Interference signal is different from truly Signal, by arranging to channel register, can filter to the passage of input channel ETPU [0] of the crankshaft signal signal1 Wave parameter is configured so that the signal period can not be recognized less than the edge of the signal in the cycle of specifying by passage, thus real Show the exclusion to high-frequency interferencing signal, complete channel noise filtering.

As shown in the step 103 in Fig. 2, due to the process for starting the operating of motor drag engine in engine start In, particularly starter just goes up the moment of electricity, and interference is particularly acute, and now speed of crankshaft is relatively low, now the bent axle letter Number signal1 is relatively weak；Crankshaft signal signal1 when just starting is filtered, to prevent rub-out signal to be identified.Tool Body implementation is to detect the change edge of the crankshaft signal signal1 after the power-up, detects the crankshaft signal signal1 First edge after be temporally filtered in i.e. Fig. 2 Blank time corresponding to filtering stage, namely initially enter meter When pattern, the time of timing determines by host computer arrange parameter, and when timing reaches front eTPU [0] any crankshaft signal is not received Edge, i.e. time are filtered into and the crankshaft signal signal1 in a period of time are not read.Set by elapsed time filtering Detect the next hopping edge of the crankshaft signal signal1 after time again, then carry out tooth number filtering, tooth number filtering corresponding to The Blank Tooth stages in Fig. 2.

Step 104 tooth filtering process：After the completion of time filtering, you can into the process；Bent axle to initial start stage Signal is filtered.Into after the process, eTPU modules acceptable takes software not carry out to new bent axle edge Any process, until the tooth number for reaching setting filters number.

Tooth number filtering continues to detect the crankshaft signal signal1, and first little tooth lacks the low electricity corresponding to 1b Tooth rim phase that high level pulse corresponding to flat pulse the first double wedge 1a adjacent with its is constituted corresponding tooth Signal, the tooth number filtered for by a number of tooth target signal filter, set when the tooth number filtering is captured Hypodontia searching is carried out after the tooth signal of quantity, the hypodontia is found for determining first low level pulse, hypodontia The searching stage is corresponding to the step 104 and 105 in Fig. 2.That is tooth number filtering is filtered with the crankshaft signal to initial start stage.Enter After entering the process, eTPU modules are receptible to the new crankshaft signal signal1 edges, but acquisition software does not carry out appointing Where is managed, and until the tooth number for reaching setting filters number, is carrying out follow-up step afterwards.

It is big finding described first in the hypodontia searching stage in the embodiment of the present invention as shown in the step 104 in Fig. 2 Tooth to lack and will carry out window filtering to tooth signal each described before corresponding first low level pulse, i.e., each tooth letter Number all of edge all should occur in window, then again ABa verifications are carried out to each edge of each tooth signal. After elapsed time filtering, tooth number filtering, the crankshaft signal signal1 that can be collected carries out the meter of tooth rim phase Calculate, and then obtain rotary speed information and positional information.Because engine has rotator inertia, therefore velocity of rotation can not possibly be mutated, institute In the case of with a tooth rim phase on known, the edge of next tooth should be occurred in certain scope；Around this principle A kind of scheme of window filtering is designed, eTPU [0] is received behind the edge of the effective crankshaft signal signal1, according to The time clock TCR1 of eTPU modules, calculates the time apart from last edge, and then obtains current tooth rim phase T_period；Again The window excursion of next tooth rim phase is calculated according to the maximum rate of change of rotating speed, according to the scope next side is can be obtained by Along the window for occurring：

The open angle of window：Last time window end time+tooth rim phase-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 making Into dropout, an edge can be inserted at close.

As shown in the step 103 in Fig. 2, it is crank position label that first canine tooth lacks, by reading the bent axle letter First low level pulse in number signal1 can then learn the position of the bent axle, in the crankshaft signal signal1 First low level pulse is the premise that engine sentences cylinder and synchronization；The ABa is verified as：B believes corresponding to presently described tooth Tooth rim phase size corresponding to number is the T in Fig. 2_B, A corresponds to the tooth rim phase size corresponding to the previous tooth signal to scheme T in 2_A, a is corresponding to the T that the tooth rim phase size corresponding to the latter tooth signal is in Fig. 2_a, judge that B is multiplied by one and is less than Whether 1 hypodontia checkout coefficient is more than A, judges that whether B is multiplied by a hypodontia checkout coefficient less than 1 more than a, if B is multiplied by One hypodontia checkout coefficient less than 1 is respectively greater than A and B, then ABa verifications pass through；If B is multiplied by a hypodontia school less than 1 Coefficient is tested less than A or B, then ABa verifications do not pass through.Use T_A、T_BAnd T_aThe ABa for representing verifies the formula for passing through：

T_B×Gap_Ratio>T_A；

T_B×Gap_Ratio>T_a。

Gap_Ratio represents hypodontia checkout coefficient in above-mentioned formula.The tooth signal institute if having passed through the ABa and having verified The corresponding low level pulse is first low level pulse corresponding to the scarce 1c of first canine tooth.The embodiment of the present invention In, all it is 3 degree because each first double wedge 1a and each first little tooth lack the central angle of 1b, first canine tooth lacks 1c's Central angle is 15 degree, therefore under normal circumstances, the first tooth rim phase corresponding to first low level pulse is one described the One double wedge 1a and first little tooth lack 3 times of the tooth rim phase corresponding to 1b, in the normal acceleration model of engine operating In enclosing, the first tooth rim phase is bound to exceed 2 times of the orthodont cycle outside the first tooth rim phase, therefore the present invention is implemented Hypodontia checkout coefficient is set to 0.5 in example.

As shown in the step 106 in Fig. 2, find first canine tooth lack 1c corresponding to first low level pulse with Afterwards, the crankshaft signal signal1 enters normal operating phase, now except the tooth to crankshaft signal signal1 each described Signal is carried out beyond window filtering, and the credible verification of rotating speed is also carried out to each tooth signal；The credible verification of rotating speed needs elder generation The range of speeds that setting is likely to occur；Such as the minimum speed and maximum speed of engine, caught according to the crankshaft signal signal1 The calculated instantaneous speed of crankshaft of current tooth rim phase for receiving scope if more than, then it is assumed that be irrational bent axle letter Number, now the transient speed of engine is not updated.

The camshaft signal processing module 10 connects the CMPS Camshaft Position Sensor 5 and receives the camshaft signal Signal2, is read by eTPU [1] passage.The camshaft signal processing module 10 is used for the camshaft signal Signal2 process, when the CMPS Camshaft Position Sensor 5 is normal, the camshaft signal signal2 after process is by height Low level is constituted, and the positional information of each second double wedge 4a corresponds to the high level pulse of the camshaft signal signal2, Each second tooth lacks the low level pulse of the positional information corresponding to the camshaft signal signal2 of 4b.From described in Fig. 3 The diagram of camshaft signal signal2 is as can be seen that the camshaft signal signal2 is by the different height of pulse width Level pulse and low level pulse are constituted, and camshaft is often rotated can produce the pulse signal that 3 dutycycles are not waited for one week.

The input of the crankshaft fault diagnostic module 9 is connected with the crankshaft signal processing module 8, for judging State crankshaft position sensor 2 whether normal, when the crankshaft position sensor 2 is normal, the crankshaft fault diagnostic module 9 it is defeated Go out end the crankshaft signal signal1 is input in the limp-home and synchronous logic processing module 12；The bent axle position Put sensor 2 it is faulty when, the crankshaft signal signal1 is not input to the limp-home and synchronous logic processing module 12 In.The failure of the crankshaft position sensor 2 is included without crankshaft signal failure and crankshaft signal signal1 abnormal failures.

As shown in fig. 6, being the schematic diagram without crankshaft signal failure of the embodiment of the present invention；It is described without crankshaft signal failure pair Crankshaft position sensor 2 described in Ying Yu does not detect the crankshaft signal signal1；The hypothesis camshaft letter in Fig. 6 Number signal2 is correct, and signal signal1a is ideal situation corresponding to the crankshaft signal signal1 curve maps under normal circumstances Under curve；Signal signal1b is not detected by any pulse signal corresponding to the curve for detecting, signal signal1b, therefore Situation corresponding to Fig. 6 is described without crankshaft signal failure.Judgement without crankshaft signal failure is realized：If the camshaft letter Number signal2 has received 6 edges, comprising 3 rising edges and 3 trailing edges；The crankshaft signal is not now also received Any trailing edge of signal1, then now can be determined that and there occurs without crankshaft signal failure.

The crankshaft signal signal1 abnormal failures detect the bent axle letter corresponding to the crankshaft position sensor 2 Exist in number signal1 and the crankshaft signal signal1 for detecting and set each described first double wedge 1a or Each first tooth is scarce to be not correspond to pulse.As shown in figure 8, being the signal of the crankshaft signal abnormal failure of the embodiment of the present invention Figure；The hypothesis camshaft signal signal2 in Fig. 8 is correct, and signal signal1a is corresponding to the bent axle under normal circumstances Signal signal1 curve maps curve i.e. ideally；Songs of the signal signal1c corresponding to the crankshaft signal when abnormal Line chart, the crankshaft signal includes two kinds of situations extremely：

The first is hypodontia exception：As shown in the region of square frame 14, should exist under normal circumstances in the region of square frame 14 scarce Tooth, in embodiments of the present invention the region of square frame 14 should exist two hypodontias be formed with the crankshaft signal disk 1 it is scarce First canine tooth of two teeth lacks 1c, but many double wedge positive electricity flat pulses really in square frame 14 so that the region of square frame 14 Cannot be verified by ABa.The judgement of the abnormal situation of hypodontia be the counting that tooth signal is carried out to the crankshaft signal signal1 simultaneously Hypodontia searching is carried out, if the counting of tooth signal has reached 120 i.e. described bent axles when have rotated the 2 circle above, again without looking for Lack corresponding first low level pulses of 1c to first canine tooth verified by ABa, then judge that the exception is different for hypodontia Often.

Second is number of teeth exception：If when being formed with scarce two in the crankshaft signal disk 1 when the hypodontia of bent axle is normal First canine tooth of individual tooth lacks 1c and the first low electricity corresponding to the scarce 1c of first canine tooth is read in the crankshaft signal During flat pulse, the tooth number for recognizing can be caused if the crankshaft signal signal1 introduces clutter to be more than orthodont situation； Or as shown in the region of square frame 13, because the tooth of the crankshaft signal disk 1 is lacked extremely the crankshaft signal signal1 can be caused The number of teeth reduce.This two classes failure hypodontia verification all normally can be found by hypodontia, but the actual crankshaft signal Signal1 has been abnormal.The abnormal judgement of the number of teeth is to find the described first low electricity corresponding to the scarce 1c of first canine tooth After flat pulse, the high level pulse after first low level pulse is counted, count value does again AB schools after reaching 58 Test, the B that AB is verified as in the ABa verifications is multiplied by whether a hypodontia checkout coefficient less than 1 is more than A, namely formula T_B× Gap_Ratio>T_AWhether set up, verify successfully if setting up, like this just there is no number of teeth exception；If be false, Then total number of teeth of the crankshaft signal signal1 is not 60-2 i.e. 58.

The input of the camshaft fault diagnosis module 11 is connected with the camshaft signal processing module 10, is used for Judge whether the CMPS Camshaft Position Sensor 5 is normal, when the CMPS Camshaft Position Sensor 5 is normal, the camshaft failure The camshaft signal signal2 is input to the limp-home and synchronous logic processing module by the output end of diagnostic module 11 In 12；When the CMPS Camshaft Position Sensor 5 is faulty, the camshaft signal signal2 is not input to the limp-home In synchronous logic processing module 12.

The failure of the CMPS Camshaft Position Sensor 5 is included without camshaft signal failure and camshaft signal abnormal failure.

As shown in fig. 7, being the schematic diagram without camshaft signal failure of the embodiment of the present invention；It is described former without camshaft signal Barrier does not detect the camshaft signal signal2 corresponding to the CMPS Camshaft Position Sensor 5；Described in hypothesis in Fig. 7 Crankshaft signal signal1 is correct, and signal signal2a is corresponding to the camshaft signal signal2 curve maps under normal circumstances Curve ideally；Signal signal2b is corresponding to the curve for detecting, it can be seen that signal signal2b is not detected To any pulse signal, therefore the situation corresponding to Fig. 7 is described without crankshaft signal failure.Judgement reality without camshaft signal failure It is existing：If the crankshaft signal signal1 has received two working cycles and have rotated 4 circles corresponding to bent axle, now also Do not receive any effective edge edge of the camshaft signal signal2, then now can be determined that and there occurs without crankshaft signal failure.

As shown in figure 9, being the schematic diagram without camshaft signal abnormal failure of the embodiment of the present invention；The camshaft signal Abnormal failure detects the camshaft signal signal2 and described detects corresponding to the CMPS Camshaft Position Sensor 5 There is the situation of the identification window for deviating from set in the hopping edge of the camshaft signal signal2.Hypothesis institute in Fig. 9 State crankshaft signal signal1 correct, signal signal2a is corresponding to the camshaft signal signal2 curve maps under normal circumstances Curve i.e. ideally；Signal signal2c corresponds to the curve for detecting, at each edge of signal signal2a I.e. rising edge or trailing edge, are all set with deviation scope of the actually detected edge relative to preferable edge, the deviation Scope is accurately positioned by the crankshaft signal signal1, and the region 15 in such as Fig. 9 illustrates actually detected edge phase For the window of the deviation scope at preferable edge, the scope that such as actual edge deviates ideal edge is ± 5 bent axle letters The tooth rim phase of number signal1.The judgement of the camshaft signal abnormal failure：Synchronization is completed in the crankshaft signal signal1 Find i.e. described first canine tooth of hypodontia lack after, now engine location has determined that；The correspondence camshaft signal signal2's Ideal curve be signal signal2a be it is known, according to the crankshaft signal signal1 provide accurate angle information, Window of the actually detected edge relative to the deviation scope at preferable edge is set up in each edge of signal signal2a；If The passage of the camshaft signal signal2 is in eTPU [1] passage, open up can read in window it is all of described convex Wheel axis signal signal2 then thinks that the camshaft signal signal2 is normal in edge；If capturing the camshaft signal The hopping edge of signal2, but some hopping edges in window do not capture, beyond right if the edge corresponding to mark 16 The window ranges answered, other all think the cam if the edge corresponding to mark 17 in corresponding window ranges, at this moment Axis signal signal2 is wrong, that is, occur in that without camshaft signal abnormal failure.

The limp-home is used to synchronizing the engine and sentencing cylinder with synchronous logic processing module 12：

In the crankshaft position sensor 2 and all normal CMPS Camshaft Position Sensor 5, the limp-home with it is same Step logic processing module 12 according to the crankshaft signal signal1 and the camshaft signal signal2 carry out Fast synchronization and Sentence cylinder, the rotation of bent axle described in a working cycles of the engine takes two turns, camshaft rotation is turned around, by the bent axle The corresponding camshaft letter at first low level pulse and the first low level pulse position in signal signal1 The level of number signal2 determines synchronization and the positional information of the engine, realizes the synchronization of the engine and sentences cylinder.As schemed Shown in 10, be the embodiment of the present invention engine Fast synchronization and sentence cylinder synchronization flow chart；As shown in figure 3, being enforcement of the present invention The logic chart of the engine synchronization of example；The Fast synchronization of the engine of the embodiment of the present invention and sentence the process of cylinder and be：

Engine synchronization includes 3 states, and 0 represents stopped status, and now bent axle and camshaft-signal sensor are not all exported Any signal；According to the above description, in engine starting process, the crankshaft signal for first passing around step 901 detects i.e. described song After time filtering and tooth number filtering in the process and identification of axis signal signal1, the effective described crankshaft signal for recognizing Signal1 edges, now think that but engine has begun to the position for rotating not yet recognize and confirm engine, synchronous regime It is updated to 1；Engine is continued to run with, and bent axle is rotated further, and can be that the hypodontia finds rank through step 902 hypodontia cognitive phase Section, is that the crankshaft signal signal1 can form first low level pulse after the first canine tooth lacks through the hypodontia of bent axle, bent Shaft detection logic is capable of identify that hypodontia information i.e. the first low level pulse according to ABa verifications, now the crank position of engine Have determined.Due to having two hypodontia information in a cycle of engine, it is thus necessary to determine that specifically which hypodontia could be realized The positioning success of real meaning；For this step 903, believed by reading the corresponding described camshaft of now camshaft at hypodontia The level state of number signal2, region 18 is to read the window of the level state of the camshaft signal signal2.Due to 3 teeth Level states of the corresponding camshaft signal signal2 of camshaft at two hypodontias is different, so now according to reading The high or low of the camshaft signal signal2 level states can immediately arrive at accurate positional information, now synchronous shape State is updated to 2, and engine is in full synchronous regime, so far completes step 904.Now can provide accurate tooth information and Circulation tooth information, while current engine cylinder number can also determine；Angle clock is activated and again behind the edge of each tooth Update the angle clock timing factor, i.e. content in step 905.

Fig. 3 is synchronous logic schematic diagram, is opened starting point, the starting position of synchronous regime=1, synchronous regime=2 in Fig. 3 All marked with arrow at beginning position.Because crankshaft signal identification process needs time filtering and tooth filtering operation, so if Last time engine stop position from edentulous site it is close if, first may be had already been through after these filtering operations are completed Hypodontia is the described first big hypodontia of first bent axle circulation, and now engine synchronization needs next hypodontia just can complete, such as Fig. 5 It is shown to be such case.If stop position has enough numbers of teeth from hypodontia, the synchronization scenario can be followed in a bent axle Complete to sentence cylinder and synchronization in ring, as shown in Figure 4 as such case, all 3 states are represented with status curves in Fig. 4 and Fig. 5 I.e. 0,1,2.To sum up, during the engine synchronization of the embodiment of the present invention, in bent axle and camshaft signal under normal circumstances one Individual cycle of engine is to complete fully synchronized in two bent axle circulations and sentence cylinder working.

The crankshaft position sensor 2 it is faulty, the CMPS Camshaft Position Sensor 5 is normal when, the limp-home Cylinder is synchronized and sentenced according to the camshaft signal signal2 with synchronous logic processing module 12, the engine control is exported Synchronization and positional information required for system, realizes the limp-home function under only described camshaft signal signal2 states. The process for synchronizing and sentencing cylinder according only to the camshaft signal signal2 is as follows：

When occurring without crankshaft signal failure, crank channel does not have any signal；In order to realize that engine location determination must Must need the camshaft signal signal2's to complete synchronization；Recognizing the camshaft signal signal2 of camshaft Afterwards, start to calculate the time between two hopping edges of the camshaft signal signal2, and using between each hopping edge when Between complete only with the camshaft signal signal2 synchronizing process：As shown in figure 12, be the embodiment of the present invention only with Camshaft signal synchronizes and sentences the schematic diagram of cylinder, and crankshaft signal signal1a is ideal curve, and TDC1 and TDC2 is corresponded to Top dead centre in two circulations of bent axle, BTDC（Before TDC）1 and BTDC2 correspond respectively to before TDC1 and TDC2, ATDC（After TDC）1 and ATDC2 corresponds respectively to after TDC1 and TDC2.Camshaft signal signal2 can be raised edge Be divided into 6 sections of regions with trailing edge, from left to right number consecutively be Seg0, Seg1, Seg2, Seg3, Seg4, Seg5, corresponding circle Heart angle is respectively 90 °C of A, 66 °C of A, 24 °C of A, 90 °C of A, 66 °C of A, 24 °C of A；Wherein minimum low level section is Seg2, minimum High level section is Seg5, and the section width in this two sections of both sides is both greater than their two times, therefore can take advantage of this two sections cycle Compared with the chip period of 2 and both sides, if 2 times of a chip period adjacent two chip periods still less than before and after, They are exactly, compared with minor cycle fragment Seg2 and Seg5, then further according to the level state difference of both, can to distinguish again The two fragments, so only rely on camshaft signal signal2 and complete position judgment work with regard to energy, i.e., by camshaft signal Signal2 determines engine location.

Realizing after camshaft signal signal2 determines engine location, in addition it is also necessary to which camshaft signal signal2 is provided Positional information just can be with precise control engine；After engine positions success, the fragment of each camshaft signal signal2 Position is known, and now each fragment angular duration is also known, and according to physics profile of tooth 360 degree of whole cam cycle is accounted for Ratio can show that angle is as shown in figure 12；Can determine when each camshaft signal signal2 edges arrive and draw cam Axle has turned over how many angles, and then extrapolates bent axle rotating disk turns over how many angles；Can also be calculated according to information above and be started The rotating speed of machine.When being controlled as engine using eTPU units, all of control positional information is carried by angle clock TCR2 For.And the source of default situations lower angle clock is the passage of the i.e. described crankshaft signal signal1 of crank channel eTPU [0], angle The accumulative timing factor of degree clock is TRR to be present in TRR registers, and this value is to obtain divided by 100 in each crank teeth cycle, I.e. 0.06 degree of angle precision.In the case of without crankshaft signal, needs are switched to camshaft angle clock source TCRCLK Passage is on eTPU [1], but because the edge of camshaft signal signal2 is not fixed width, so when angle is calculated The ratio for considering each segment width is needed when the clock timing factor.Specific way is after each edge capture, to obtain To the duration of this section of fragment, 6 crank angle degrees duration, i.e., one song are calculated by the angular duration of the fragment The time of axle tooth rim phase；Carry out virtual tooth interruption, then just can according to this time divided by 100 obtain angle clock count because The value of sub- TRR, so as to realize using camshaft signal signal2 to provide the angle clock TCR2 needed for a control position.

The crankshaft position sensor 2 it is normal, the CMPS Camshaft Position Sensor 5 is faulty when, the limp-home With synchronous logic processing module 12 is according to the crankshaft signal signal1 and to carry out examination spray realizations synchronous and sentence cylinder, export described in Synchronization and positional information required for engine control, realizes that the limping under only described crankshaft signal signal1 states is returned Family's function.The crankshaft position sensor 2 it is normal, the CMPS Camshaft Position Sensor 5 is faulty when, the limp-home with Synchronous logic processing module 12 is as follows according to the process that the crankshaft signal signal1 synchronized and sentenced cylinder：

Camshaft signal signal2 is served during cylinder is entirely synchronously sentenced and is distinguished the crankshaft signal signal1's The effect of hypodontia, so in the event of the failure of camshaft signal failure, hypodontia can not be distinguished normally in start-up course；This The Shi Caiyong methods of examination spray are come synchronous：First, when the hypodontia for finding the crankshaft signal signal1, and according to the cam Level state determines edentulous site and completes synchronization at axis signal signal2, it is noted that now due to the camshaft signal If signal2 is insincere, the judgement of hypodontia may fail；If confirming camshaft signal event after crank rotation two is enclosed Barrier, now by examination spray flag set.After examination spray flag set, into examination spray detection, at one of the crankshaft signal signal1 Examination spray for the first time is carried out at first low level pulse, if in the crankshaft signal of setting after the first time examination spray The rotating speed of the engine reaches setting value in the periodicity of signal1, and what the first time examination was sprayed sentences cylinder result correctly, preferably For the limp-home is synchronized and sentenced in cylinder with synchronous logic processing module 12 according to the crankshaft signal signal1, institute When stating that the rotating speed of the engine reaches 400rpm in the periodicity of 4 crankshaft signal signal1 after for the first time examination spray It is correct that what the first time examination was sprayed sentences cylinder result；If in the crankshaft signal signal1 of setting after the first time examination spray Periodicity in the rotating speed of the engine be not reaching to setting value, then prove that now engine is in the dragging stage, Prove that examination spray is wrong, i.e., 360 degree of the phase of real phase place and judgement, at this moment need to increase on the angle clock of examination spray Degree of plus 360, trying the first time cylinder result of sentencing of spray carries out upset and is correctly sentenced cylinder result, and now cylinder number is also changed to just True cylinder number, at this moment needs to carry out second examination spray.If in the crankshaft signal of setting after second examination spray The rotating speed of the engine reaches setting value in the periodicity of signal1, and it is correct that what second examination was sprayed sentences cylinder result.In order to Prevent from trying spray repeatedly to cause engine to flood cylinder phenomenon, if rotating speed is not reaching to make a reservation for after second examination spray, while phase place is adjusted Still desired speed is not reaching to after whole then forbids examination spray, engine to shut down.

When the faulty and described CMPS Camshaft Position Sensor 5 of the crankshaft position sensor 2 is all faulty, the limping Go home to forbid carrying out with synchronous logic processing module 12 sentencing cylinder working, and release after the engine is shut down and forbid.

The management method of embodiment of the present invention engine location management system determines the engine using following steps Position：

The crank rotation of the engine simultaneously drives the crankshaft signal disk 1 to rotate, 2 pairs of institutes of the crankshaft position sensor State the first double wedge 1a and first tooth and lack and detected and formed the crankshaft signal signal1.

The cam axle of the engine simultaneously drives the camshaft signal disk 4 to rotate, the speed of the cam axle Rate is the half of the speed of the crank rotation.

The crankshaft signal signal1 of the crankshaft signal processing module 8 pairs is processed and recognized.

The camshaft signal signal2 process of the camshaft signal processing module 10 pairs.

The crankshaft fault diagnostic module 9 judges whether the crankshaft position sensor 2 is normal, passes in the crank position During the crankshaft signal signal1 is input to into the limp-home and synchronous logic processing module 12 when sensor 2 is normal；Institute State crankshaft position sensor 2 it is faulty when, the crankshaft signal signal1 is not input at the limp-home and synchronous logic In reason module 12.

The camshaft fault diagnosis module 11 judges whether the CMPS Camshaft Position Sensor 5 is normal, in the cam The camshaft signal signal2 is input to into the limp-home when shaft position sensor 5 is normal and processes mould with synchronous logic In block 12；When the CMPS Camshaft Position Sensor 5 is faulty, the camshaft signal signal2 is not input to the limping Go home with synchronous logic processing module 12.

The limp-home synchronizes and sentences cylinder with 12 pairs of engines of synchronous logic processing module：

In the crankshaft position sensor 2 and all normal CMPS Camshaft Position Sensor 5, the limp-home with it is same Step logic processing module 12 according to the crankshaft signal signal1 and the camshaft signal signal2 carry out Fast synchronization and Sentence cylinder, the rotation of bent axle described in a working cycles of the engine takes two turns, camshaft rotation is turned around, by finding institute The synchronization that first low level pulse in crankshaft signal signal1 realizes the engine is stated, by reading the bent axle The level of the corresponding camshaft signal signal2 is carried out at first low level pulse in signal signal1 Cylinder is sentenced so that it is determined that synchronization and the positional information of the engine, realize the synchronization of the engine and sentence cylinder.As shown in Figure 10, Be the embodiment of the present invention engine Fast synchronization and sentence cylinder synchronization flow chart；As shown in figure 3, being starting for the embodiment of the present invention The synchronous logic chart of machine；The Fast synchronization of the engine of the embodiment of the present invention and sentence the process of cylinder and be：

The crankshaft position sensor 2 it is faulty, the CMPS Camshaft Position Sensor 5 is normal when, the limp-home Cylinder is synchronized and sentenced according to the camshaft signal signal2 with synchronous logic processing module 12, the engine control is exported Synchronization and positional information required for system, realizes the limp-home function under only described camshaft signal signal2 states.

The crankshaft position sensor 2 it is normal, the CMPS Camshaft Position Sensor 5 is faulty when, the limp-home With synchronous logic processing module 12 is according to the crankshaft signal signal1 and to carry out examination spray realizations synchronous and sentence cylinder, export described in Synchronization and positional information required for engine control, realizes that the limping under only described crankshaft signal signal1 states is returned Family's function.

As shown in figure 11, it is embodiment of the present invention Troubleshooting Flowchart；Embodiment of the present invention fault diagnosis flow scheme includes：

Step 1001 carries out crank channel initialization, enters after the completion of crank channel eTPU [0] initialization and prepares to receive The state of crankshaft signal signal1；Step 1002 carries out cam shaft passage initialization, and cam shaft passage eTPU [1] has been initialized Into rear i.e. into the state for preparing to receive camshaft signal signal2；According to configuration, crank channel eTPU [0] is ready to receive From the decline saltus step edge of crankshaft-signal sensor；Cam shaft passage eTPU [1] is ready to receive from camshaft signal sensing The raising and lowering hopping edge of device；Two passages have and independent receive interrupt processing.

Judgement without crankshaft fault is realized：If having received camshaft signal sensing in cam shaft passage eTPU [1] 6 edges of device, comprising 3 rising edges and 3 trailing edges；Now in the effective Edge check of the bent axle of step 1003, bent axle letter The receiving channel of number sensor is the trailing edge that crank channel eTPU [0] does not also receive any crankshaft signal signal1, then this When can be determined that and there occurs without crankshaft signal failure, by execution step 1016 without crankshaft signal failure set.As shown in fig. 6, It is the schematic diagram without crankshaft signal failure of the embodiment of the present invention.

Judgement without camshaft failure, in the camshaft signal level and edge identification step of step 7, if bent axle letter Number signal1 receives two working cycles, through step 1007, cam shaft passage eTPU [1] also do not get it is any effectively Camshaft signal signal2 edge, now can be determined that and there occurs without camshaft signal failure, through the convex of step 1008 1025 pairs of DTCs without camshaft signal failure of execution step are carried out into set after the judgement that wheel shaft edge occurs.Such as Fig. 7 institutes Show, be the schematic diagram without camshaft signal failure 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 different Often.As shown in figure 8, when the tooth rim phase is not 3 times of tooth rim phases at the hypodontia of bent axle, the mistake corresponds to region corresponding to square frame 14 Mistake, the high level pulse in the region in first low level pulse corresponding to many first double wedges, ABa checking treatments in crankshaft signal identification process cannot be normally completed；In this case, execution step 1004, start note Record hypodontia confirms the number of teeth before completing, if count having reached 120 teeth, i.e., two bent axle working cycles now then think to reach The condition of step 1005, execution step 1017, bent axle hypodontia fault set are arrived.If bent axle hypodontia is normal, carry out Step 1006, i.e. hypodontia confirm to complete, and recognize and complete after hypodontia synchronization.If crankshaft signal signal1 introduces clutter meeting The tooth number for recognizing is caused more than orthodont situation, or because signal panels physics tooth disappearance extremely can cause crankshaft signal The signal1 numbers of teeth reduce, and it has been abnormal that but this two classes failure hypodontia verification is ABa verifications all normal actual signals；Step 1011 is that, in order to recognize above exception, specific practice is first after bent axle hypodontia i.e. after first low level pulse high Tooth number corresponding to level pulse is 1, because high level pulse is produced by the first double wedge 1a, each first double wedge 1a later Corresponding high level pulse can produce and once interrupt and make tooth number Jia 1, after 58 if in crankshaft signal under normal circumstances Tooth, i.e. tooth number are at 58 teeth, to find to be still hypodontia after checking through AB, then it is assumed that bent axle is normal signal, else if AB verifications failure at 58 teeth, then be judged to that crank teeth failure, i.e. crankshaft signal have hypodontia but total number of teeth is not equal to 60- 2.Both the above situation is abnormal crankshaft signal failure, and after step 1012 judges, execution step 1017 is by crankshaft signal Failure set.

The judgement of camshaft failure：After step 1006 crank channel completes synchronously to find hypodontia, now start seat in the plane Put and have determined that；The position that the theoretical edge of correspondence camshaft signal signal2 occurs is known.Execution step 1007 recognizes convex The effective edge edge of wheel axis signal signal2, according to the accurate angle information that crankshaft signal signal2 is supplied to, to camshaft The region that the theoretical edge of signal signal2 occurs creates and receives window, and cam shaft passage is that eTPU [1] receives convex in window The theoretical edge of wheel axis signal signal2；If cam shaft passage can read in window all of camshaft letter opening up The edge of number signal2；Step 1009 judges normally, then it is assumed that camshaft signal signal2 is normal；In step 1008 The hopping edge of camshaft signal signal2 is captured, but some hopping edges in window do not capture, after step 1009 judges Then it is considered camshaft signal signal2 mistakes, execution step 1026 is by camshaft fault code set.As shown in Figure 9 i.e. For camshaft signal fault-signal schematic diagram.

The crankshaft position sensor 2 it is normal, the CMPS Camshaft Position Sensor 5 is faulty when, the limp-home It is as follows according to the process that the crankshaft signal signal1 synchronized and sentenced cylinder with synchronous logic processing module 12：Camshaft is believed Number signal2 it is whole it is synchronous sentence the effect for distinguishing hypodontia is served during cylinder, so in the event of camshaft signal mistake The failure of effect, hypodontia can not be distinguished normally in start-up course；Now execution step 1027, that is, start when bent axle examination spray, with examination The method of spray is come synchronous；When the hypodontia for finding crankshaft signal signal1, and according to level state at camshaft signal signal2 Determine edentulous site and complete synchronization, it is noted that now due to camshaft signal signal2 it is insincere if, the judgement of hypodontia can Be able to can fail；Confirm camshaft signal failure after crank rotation two is enclosed, now by examination spray flag set；Examination spray flag set Afterwards, carry out examination and spray and enter examination spray detection logic, i.e., after two complete cycle of engine, detection engine averagely turns Speed, thinks that engine examination spray is correct if rotating speed exceedes after the judgement of setting value step 1028, and examination first is sprayed into work(, now synchronous Complete, preferably, the setting value of rotating speed is 400rpm；If rotating speed is not above setting value, step 1028 judges not pass through, Now engine is in the dragging stage, it was demonstrated that examination spray is wrong, i.e., the phase 360 of real phase place and judgement Degree；The system of execution step 1029 is defined and offsets 360 degree of 360 degree of angle clock increases for realizing will determine that, now cylinder number It is changed to correct cylinder number.Hereafter if reached more than the rotating speed of setting, by step after engine crankshaft drags again two circles 1030 judge to successfully complete synchronization by then trying spray；Engine is caused to flood cylinder phenomenon in order to prevent from trying spray repeatedly, if second Rotating speed is not reaching to make a reservation for after examination spray, while desired speed will be still not reaching to after phase adjustment then forbids examination spray, performs step Rapid 1015, engine is shut down, and positional information resets.

The process for synchronizing and sentencing cylinder according only to the camshaft signal signal2 is as follows：When generation is without crankshaft signal During failure, crank channel does not have any signal；It is necessarily required to adopt camshaft signal to realize that engine location determines Signal2 is completing synchronization；Execution step 1018 is recognized after camshaft signal signal2, starts to calculate camshaft signal Time between two hopping edges of signal2, execution step 1019 completes what is carried out only with camshaft signal signal2 Synchronizing process；As shown in figure 12, camshaft signal signal2 can be raised edge to the synchronous concrete grammar and trailing edge is divided into 6 sections of regions, from left to right number consecutively is Seg0, Seg1, Seg2, Seg3, Seg4, Seg5；Wherein minimum low level section is The high level section of Seg2 and minimum is Seg5, and the section width in this two sections of both sides is both greater than their two times, therefore can be by this Two sections of cycle be multiplied by 2 and the chip period of both sides compare, if 2 times of a chip period adjacent two still less than before and after Individual chip period, they be exactly compared with minor cycle fragment Seg2 and Seg5, it is then different further according to the level state of both, can To distinguish the two fragments again.So far only rely on camshaft signal signal2 just complete position judgment work complete The judgement of step 1020.Realize camshaft signal signal2 to determine after engine location, in addition it is also necessary to camshaft signal Signal2 provides positional information just can be with precise control engine；When carrying out engine positioning using camshaft signal signal2 After success, the piece fragment position of each camshaft signal signal2 is known, and now each fragment angular duration is also known , can be drawn according to the ratio that physics profile of tooth accounts for 360 degree of whole cam cycle；On the side of each camshaft signal signal2 Show camshaft has turned over how many angles along can determine when arriving, and then extrapolate bent axle rotating disk turns over how many angles；According to Information above can also calculate the rotating speed of engine.When being controlled as engine using eTPU units, all of control position Information is provided by angle clock TCR2.And the source of default situations lower angle clock is crank channel eTPU [0], during angle The accumulative timing factor of clock is present in TRR registers, and this value is to obtain divided by 100 in each crank teeth cycle, i.e., 0.06 degree Angle precision.In the case of without crankshaft signal signal1, needs are switched to camshaft and lead to angle clock source TCRCLK On road, but because the edge of camshaft signal signal2 is not fixed width, so calculating the angle clock timing factor When need consider each segment width ratio.Specific way is caught at each edge of camshaft signal signal2 After obtaining, the duration of this section of fragment is obtained, 6 crank angle degrees duration was calculated by the angular duration of the fragment, The time of the tooth rim phase of i.e. one crankshaft signal signal1；Execution step 1022 carries out virtual tooth interruption, then just can basis This time divided by 100 values for obtaining angle clock count factor TRR, when providing the angle needed for a control using camshaft Clock TCR2, realizes the content in step 1023.As seen from Figure 11, step is carried out after step 1020 judges failure 1024, i.e. synchronization failure, carry out afterwards step 1015, and engine is shut down and positional information resets.In step 1023, step 1012 And after step 1028 is normal, normal working of engine, until the engine for carrying out step 1013 shuts down detection, step 1013 it After carry out step 1014 realize engine shut down, carry out again step 1015 realize positional information reset.

The present invention has been described in detail above by specific embodiment, but these not constitute the limit to the present invention System.Without departing from the principles of the present invention, those skilled in the art can also make many deformations and improvement, and these also should It is considered as protection scope of the present invention.

Claims

1. a kind of engine location management system, it is characterised in that include：

Crankshaft signal disk, is arranged on the bent axle of engine and with the crank rotation, the outer circumferential of the crankshaft signal disk Into there are multiple first double wedges, the first tooth is formed between two adjacent first double wedges and is lacked, first tooth lacks and includes one First canine tooth lacks and the multiple first little teeth lack, and the central angle of each first double wedge is identical, the scarce center of circle of each first little tooth Angle is all identical with the central angle of each first double wedge, and the scarce central angle of first canine tooth is the circle of 1 first double wedge 5 times of heart angle；

Crankshaft position sensor, for when the crankshaft signal disk is with the crank rotation to first double wedge and described One tooth is scarce to be detected and is formed crankshaft signal, and the crankshaft signal is used to indicate the crank angle information and song of the engine Shaft position information；

Camshaft signal disk, is arranged on the camshaft of the engine and with the cam axle, the camshaft signal The excircle of disk is formed with 3 the second double wedges, the second tooth is formed between two adjacent second double wedges and is lacked, and each described second The central angle of double wedge is different, and the scarce central angle of each second tooth is also different；

CMPS Camshaft Position Sensor, for when the camshaft signal disk is with the crank rotation to second double wedge and institute State the second tooth lack detected and formed camshaft signal；The camshaft signal is used to indicate the operation cycle of the engine Positional information；

ETPU control units, the eTPU control units include crankshaft signal processing module, crankshaft fault diagnostic module, camshaft Signal processing module, camshaft fault diagnosis module, limp-home and synchronous logic processing module；

The crankshaft signal processing module connects the crankshaft position sensor and receives the crankshaft signal, the crankshaft signal Processing module is used to processing the crankshaft signal and being identified the position that each first double wedge and each first tooth are scarce Confidence ceases；When the crankshaft position sensor is normal, the crankshaft signal after process is made up of low and high level, and each described first , corresponding to the high level pulse of the crankshaft signal, the scarce positional information of each first tooth is corresponding to institute for the positional information of double wedge State the low level pulse of crankshaft signal, each described low level pulse of the crankshaft signal and the high level adjacent behind Pulse constitutes a tooth rim phase, makes the low level pulse corresponding to the scarce positional information of first canine tooth be the first low electricity Flat pulse, the tooth rim phase corresponding to first low level pulse be the first tooth rim phase, first low level pulse it is previous The tooth rim phase corresponding to the individual low level pulse was the second tooth rim phase, the latter low electricity of first low level pulse The tooth rim phase corresponding to flat pulse was the 3rd tooth rim phase, and the first tooth rim phase is multiplied by after a hypodontia checkout coefficient less than 1 Respectively greater than described second tooth rim phase and the 3rd tooth rim phase；

The camshaft signal processing module connects the CMPS Camshaft Position Sensor and receives the camshaft signal, described convex Wheel shaft signal processing module is used to process the camshaft signal, when the CMPS Camshaft Position Sensor is normal, processes The camshaft signal afterwards is made up of low and high level, and the positional information of each second double wedge corresponds to the camshaft signal High level pulse, low level pulse of the scarce positional information of each second tooth corresponding to the camshaft signal；

The input of the crankshaft fault diagnostic module is connected with the crankshaft signal processing module, for judging the bent axle Whether position sensor is normal, and when the crankshaft position sensor is normal, the output end of the crankshaft fault diagnostic module is by institute State crankshaft signal to be input in the limp-home and synchronous logic processing module；When the crankshaft position sensor is faulty, The crankshaft signal is not input in the limp-home and synchronous logic processing module；

The input of the camshaft fault diagnosis module is connected with the camshaft signal processing module, described for judging Whether CMPS Camshaft Position Sensor is normal, when the CMPS Camshaft Position Sensor is normal, the camshaft fault diagnosis module During the camshaft signal is input to the limp-home and synchronous logic processing module by output end；The camshaft location is passed When sensor is faulty, the camshaft signal is not input in the limp-home and synchronous logic processing module；

In the crankshaft position sensor and all normal CMPS Camshaft Position Sensor, the limp-home and synchronous logic Processing module carries out Fast synchronization and sentences cylinder, a work of the engine according to the crankshaft signal and the camshaft signal Bent axle described in circulating rotation take two turns, the camshaft rotation turn around, by the crankshaft signal in first low level The level of the corresponding camshaft signal determines the synchronization of the engine at pulse and the first low level pulse position And positional information, realize the synchronization of the engine and sentence cylinder；

The crankshaft position sensor it is faulty, the CMPS Camshaft Position Sensor is normal when, the limp-home with it is synchronous Logic processing module synchronizes and sentences cylinder according to the camshaft signal, export synchronization required for the engine control with Positional information, realizes the limp-home function under only described camshaft signal state；

The crankshaft position sensor it is normal, the CMPS Camshaft Position Sensor is faulty when, the limp-home with it is synchronous Logic processing module is according to the crankshaft signal and carries out examination spray realization synchronously and sentences cylinder, exports the engine control required Synchronization and positional information, realize limp-home function under only described crankshaft signal state；

When the faulty and described CMPS Camshaft Position Sensor of the crankshaft position sensor is all faulty, the limp-home with Synchronous logic processing module forbids carrying out sentencing cylinder working, and releases after the engine is shut down and forbid.

2. engine location management system as claimed in claim 1, it is characterised in that：On the crankshaft signal disk described The number of one double wedge is 58, and the scarce number of the first little tooth is 57, each first double wedge and each first little tooth Scarce central angle is all 3 degree, and the scarce central angle of first canine tooth is 15 degree；A first little tooth in the crankshaft signal The angle of the tooth rim phase of low level pulse and high level pulse composition adjacent behind corresponding to lacking corresponds to 6 degree, The eTPU control units carry out providing the crank angle control information that precision is 0.06 degree after frequency multiplication to the crankshaft signal.

3. engine location management system as claimed in claim 1, it is characterised in that：The crankshaft signal processing module is to institute Stating the process and identification of crankshaft signal includes：

Configured by eTPU passages and enable the high-frequency noise that channel noise filter function filters out the crankshaft signal；

The change edge of the crankshaft signal is detected after the power-up, and behind first edge for detecting the crankshaft signal time filter is carried out Ripple, time filtering is that the crankshaft signal in a period of time is not read, and elapsed time filtering is examined again after the set time The next hopping edge of the crankshaft signal is surveyed, tooth number filtering is then carried out；

Tooth number filtering continues to detect the crankshaft signal, signal one tooth signal of correspondence of a tooth rim phase, the tooth number Filter for by a number of tooth target signal filter, when the tooth letter for capturing the set quantity of the tooth number filtering Number hypodontia searching is carried out later, the hypodontia is found for determining first low level pulse；

In the hypodontia searching stage, to every before finding first canine tooth and lacking corresponding first low level pulse The individual tooth signal will carry out window filtering, i.e., all of edge of each tooth signal all should be occurred in window, so Again ABa verifications are carried out to each edge of each tooth signal afterwards, tooth signal institute is right if having passed through the ABa and having verified The low level pulse answered is that first canine tooth lacks corresponding first low level pulse；The ABa is verified as：B Corresponding to the tooth rim phase size corresponding to presently described tooth signal, A is corresponding to the tooth rim phase corresponding to the previous tooth signal Size, a judges that B is multiplied by a hypodontia verification system less than 1 corresponding to the tooth rim phase size corresponding to the latter tooth signal Whether number is more than A, judges that whether B is multiplied by a hypodontia checkout coefficient less than 1 more than a, if B is multiplied by lacking less than 1 Tooth checkout coefficient is respectively greater than A and a, then ABa verifications pass through；If B be multiplied by a hypodontia checkout coefficient less than 1 less than A or A, then ABa verifications do not pass through.

4. engine location management system as claimed in claim 1, it is characterised in that：The failure of the crankshaft position sensor Including without crankshaft signal failure and crankshaft signal abnormal failure；It is described to sense corresponding to the crank position without crankshaft signal failure Device does not detect the crankshaft signal；The crankshaft signal abnormal failure detects institute corresponding to the crankshaft position sensor State and exist in crankshaft signal and the crankshaft signal for detecting and set each described first double wedge or each described the One tooth is scarce to be not correspond to pulse.

5. engine location management system as claimed in claim 1, it is characterised in that：The event of the CMPS Camshaft Position Sensor Barrier is included without camshaft signal failure and camshaft signal abnormal failure；It is described to correspond to the cam without camshaft signal failure Shaft position sensor does not detect the camshaft signal；The camshaft signal abnormal failure corresponds to the cam axle position Put sensor and detect to exist in the hopping edge of the camshaft signal and the camshaft signal for detecting and deviate from The situation of set identification window.

6. the engine location management system as described in claim 1 or 5, it is characterised in that：In the crankshaft position sensor Normally, when the CMPS Camshaft Position Sensor is faulty, the limp-home is with synchronous logic processing module according to the bent axle Signal synchronizes and sentences cylinder, and the bent axle rotation described in a working cycles of the engine takes two turns, the crankshaft signal In first low level pulse occur twice, the being carried out at first low level pulse of the crankshaft signal Once examination spray, after first time examination spray if in the periodicity of the crankshaft signal of setting the engine turn up To setting value, it is correct that what the first time examination was sprayed sentences cylinder result；If in the bent axle letter of setting after the first time examination spray Number periodicity in the rotating speed of the engine be not reaching to setting value, the cylinder result of sentencing that the first time tries spray is overturn Correctly sentenced cylinder result.

7. engine location management system as claimed in claim 1, it is characterised in that：When the crankshaft signal is normal, institute ETPU control units are stated using the crankshaft signal as clock source, there is provided angle clock information；When the engine start Or need to cut off the crankshaft signal as clock when crankshaft signal breaks down described in the engine operation process Source, switches to using the camshaft signal as clock source, there is provided angle clock information.

8. the management method of engine location management system as claimed in claim 1, it is characterised in that true using following steps The position of the fixed engine：

The crank rotation of the engine simultaneously drives the crankshaft signal disk to rotate, and the crankshaft position sensor is to described first Double wedge and first tooth lack and are detected and formed the crankshaft signal；

The cam axle of the engine simultaneously drives the camshaft signal disk to rotate, and the speed of the cam axle is institute State the half of the speed of crank rotation；

The crankshaft signal processing module is processed and recognized to the crankshaft signal；

The camshaft signal processing module is processed the camshaft signal；

The crankshaft fault diagnostic module judges whether the crankshaft position sensor is normal, in the crankshaft position sensor just During the crankshaft signal is input to into the limp-home and synchronous logic processing module when often；In the crankshaft position sensor When faulty, the crankshaft signal is not input in the limp-home and synchronous logic processing module；

The camshaft fault diagnosis module judges whether the CMPS Camshaft Position Sensor is normal, passes in the camshaft location During the camshaft signal is input to into the limp-home and synchronous logic processing module when sensor is normal；In the camshaft When position sensor is faulty, the camshaft signal is not input in the limp-home and synchronous logic processing module；

In the crankshaft position sensor and all normal CMPS Camshaft Position Sensor, the limp-home and synchronous logic Processing module carries out Fast synchronization and sentences cylinder, a work of the engine according to the crankshaft signal and the camshaft signal The rotation of bent axle described in circulating takes two turns, camshaft rotation is turned around, by described first in the searching crankshaft signal Low level pulse realizes the synchronization of the engine, by first low level pulse in the reading crankshaft signal pairs The level of the camshaft signal answered carries out sentencing cylinder synchronization and positional information so that it is determined that the engine, realizes institute State the synchronization of engine and sentence cylinder；

9. method as claimed in claim 8, it is characterised in that：Place of the crankshaft signal processing module to the crankshaft signal Reason and identification include：

In the hypodontia searching stage, to every before finding first canine tooth and lacking corresponding first low level pulse The individual tooth signal will carry out window filtering, i.e., all of edge of each tooth signal all should be occurred in window, so Again ABa verifications are carried out to each edge of each tooth signal afterwards, tooth signal institute is right if having passed through the ABa and having verified The low level pulse answered is that first canine tooth lacks corresponding first low level pulse；The ABa is verified as：B Corresponding to the tooth rim phase size corresponding to presently described tooth signal, A is corresponding to the tooth rim phase corresponding to the previous tooth signal Size, a judges that B is multiplied by a hypodontia verification system less than 1 corresponding to the tooth rim phase size corresponding to the latter tooth signal Whether number is more than A, judges that whether B is multiplied by a hypodontia checkout coefficient less than 1 more than a, if B is multiplied by lacking less than 1 Tooth checkout coefficient is respectively greater than A and B, then ABa verifications pass through；If B be multiplied by a hypodontia checkout coefficient less than 1 less than A or B, then ABa verifications do not pass through.

10. method as claimed in claim 8, it is characterised in that：The crankshaft position sensor is normal, the cam axle position Put sensor it is faulty when, the limp-home is synchronized and sentenced with synchronous logic processing module according to the crankshaft signal Cylinder, the bent axle rotation described in a working cycles of the engine takes two turns, the described first low electricity in the crankshaft signal Flat pulse occurs twice, carries out for the first time examination spray at first low level pulse of the crankshaft signal, and described the Once if the rotating speed of the engine reaches setting value in the periodicity of the crankshaft signal of setting after examination spray, described the It is correct that what once examination was sprayed sentences cylinder result；If described in the periodicity of the crankshaft signal of setting after the first time examination spray The rotating speed of engine is not reaching to setting value, to the first time try spray sentence cylinder result carry out upset correctly sentenced cylinder knot Really.