WO2011093462A1 - 内燃機関の制御装置及び制御方法 - Google Patents
内燃機関の制御装置及び制御方法 Download PDFInfo
- Publication number
- WO2011093462A1 WO2011093462A1 PCT/JP2011/051787 JP2011051787W WO2011093462A1 WO 2011093462 A1 WO2011093462 A1 WO 2011093462A1 JP 2011051787 W JP2011051787 W JP 2011051787W WO 2011093462 A1 WO2011093462 A1 WO 2011093462A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- crank angle
- internal combustion
- combustion engine
- rotation
- reverse rotation
- Prior art date
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0223—Variable control of the intake valves only
- F02D13/0234—Variable control of the intake valves only changing the valve timing only
- F02D13/0238—Variable control of the intake valves only changing the valve timing only by shifting the phase, i.e. the opening periods of the valves are constant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/009—Electrical control of supply of combustible mixture or its constituents using means for generating position or synchronisation signals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D41/222—Safety or indicating devices for abnormal conditions relating to the failure of sensors or parameter detection devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0814—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
- F02N11/0818—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode
- F02N11/0825—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode related to prevention of engine restart failure, e.g. disabling automatic stop at low battery state
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L1/053—Camshafts overhead type
- F01L2001/0537—Double overhead camshafts [DOHC]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2800/00—Methods of operation using a variable valve timing mechanism
- F01L2800/03—Stopping; Stalling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2820/00—Details on specific features characterising valve gear arrangements
- F01L2820/04—Sensors
- F01L2820/041—Camshafts position or phase sensors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2820/00—Details on specific features characterising valve gear arrangements
- F01L2820/04—Sensors
- F01L2820/042—Crankshafts position
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/16—Indirect injection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D2013/0292—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation in the start-up phase, e.g. for warming-up cold engine or catalyst
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
- F02D9/1035—Details of the valve housing
- F02D9/105—Details of the valve housing having a throttle position sensor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2200/00—Parameters used for control of starting apparatus
- F02N2200/02—Parameters used for control of starting apparatus said parameters being related to the engine
- F02N2200/021—Engine crank angle
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Definitions
- the present invention relates to a control device and control method for an internal combustion engine, and more particularly to a device and method for detecting the crank angle when the internal combustion engine is stopped by discriminating forward / reverse rotation of the crankshaft.
- crank angle at the time of engine stop is memorized and the crank at the time of stop memorized at the time of restart
- the crank angle is estimated using the angle as an initial value, and fuel injection and ignition are started based on the estimated crank angle, and when the engine is stopped, the internal combustion engine is once reversed by the pressure in the combustion chamber and then stopped.
- a control device for an internal combustion engine that detects and detects the crank angle at the time of stop is known (see, for example, Patent Document 1).
- a rotation sensor that outputs a pulse signal synchronized with the rotation of the crankshaft is provided, and the pulse width and amplitude of the pulse signal are determined to be normal rotation /
- There is a method of discriminating forward rotation / reverse rotation by making the difference depending on the reverse rotation and comparing the measured value of the pulse width / amplitude with a threshold value.
- the present invention has been made in view of the above problems, and an object of the present invention is to provide a control device for an internal combustion engine that can diagnose whether normal rotation / reverse rotation of the internal combustion engine (crankshaft) is normally performed.
- the present invention discriminates forward / reverse rotation of the crankshaft of the internal combustion engine, detects the crank angle when the internal combustion engine is stopped based on the determination result of forward / reverse rotation, and uses the crank angle when stopped as a reference And the crank angle detected after the start of the internal combustion engine is compared to determine whether there is an abnormality in the forward / reverse determination.
- FIG. 1 is a system configuration diagram of an internal combustion engine in an embodiment. It is a figure which shows the structure of the crank angle sensor and cam sensor in embodiment. It is a time chart which shows the output characteristic of the crank angle sensor and cam sensor in an embodiment. It is a time chart which shows the difference in the pulse width and amplitude by the forward rotation / reverse rotation of the rotation signal in the embodiment. It is a time chart which shows the increase / decrease change of the counter CNTPOS in embodiment, (A) is a time chart which shows the change when reverse rotation is detected correctly, (B) is the time chart which shows the change when reverse rotation is not detected. 4 is a time chart showing fuel injection / ignition control at the time of restart based on correct forward / reverse rotation determination in the embodiment.
- 6 is a time chart showing fuel injection / ignition control at the time of restart when the forward rotation / reverse rotation determination is wrong in the embodiment.
- 6 is a flowchart illustrating crank angle detection processing, forward / reverse rotation determination processing, and forward / reverse rotation determination processing according to the embodiment.
- 6 is a flowchart illustrating crank angle detection processing, forward / reverse rotation determination processing, and forward / reverse rotation determination processing according to the embodiment.
- 5 is a flowchart showing fuel injection / ignition control when an abnormality in forward / reverse rotation determination is abnormal in the embodiment. It is a time chart which shows the diagnostic processing of forward rotation / reverse rotation discrimination in an embodiment.
- 5 is a flowchart showing fuel injection / ignition control when an abnormality in forward / reverse rotation determination is abnormal in the embodiment.
- FIG. 1 is a configuration diagram of a vehicle internal combustion engine 101 to which a control device according to the present invention is applied.
- the internal combustion engine 101 is an in-line four-cylinder four-cycle engine.
- an intake pipe 102 of an internal combustion engine 101 is provided with an electronically controlled throttle 103 that opens and closes a throttle valve 103b by a throttle motor 103a.
- the internal combustion engine 101 sucks air into the combustion chamber 106 of each cylinder via the electronic control throttle 103 and the intake valve 105.
- a fuel injection valve 131 is provided in the intake port 130 of each cylinder, and the fuel injection valve 131 is opened by an injection pulse signal from an ECU (engine control unit) 114 as a control device to inject fuel. To do.
- ECU engine control unit
- the fuel in the combustion chamber 106 is ignited and burned by spark ignition by the spark plug 104.
- Each ignition plug 104 is equipped with an ignition module 112 that incorporates an ignition coil and a power transistor that controls energization of the ignition coil.
- the combustion gas in the combustion chamber 106 flows out to the exhaust pipe 111 through the exhaust valve 107.
- a front catalytic converter 108 and a rear catalytic converter 109 provided in the exhaust pipe 111 purify exhaust flowing through the exhaust pipe 111.
- the intake camshaft 134 and the exhaust camshaft 110 are integrally provided with a cam, and the intake valve 105 and the exhaust valve 107 are operated by this cam.
- the intake valve 105 and / or the exhaust valve 107 may be provided with a variable valve mechanism that makes at least one of valve timing, maximum valve lift, and valve operating angle variable.
- ECU 114 has a built-in microcomputer, performs calculations according to a program stored in advance in memory, and controls electronic control throttle 103, fuel injection valve 131, ignition module 112, and the like.
- the ECU 114 inputs detection signals from various sensors.
- an accelerator opening sensor 116 that detects an opening (accelerator opening) ACC of an accelerator pedal 116a
- an airflow sensor 115 that detects an intake air amount Q of the internal combustion engine 101
- a crank that is an output shaft of the internal combustion engine 101
- a crank angle sensor (rotation sensor) 117 that outputs a pulsed rotation signal (unit crank angle signal) POS according to the rotation of the shaft 120
- a throttle sensor 118 that detects the opening TVO of the throttle valve 103b, and cooling of the internal combustion engine 101
- a water temperature sensor 119 that detects the water temperature TW
- a cam sensor 133 that outputs a pulsed cam signal PHASE in response to the rotation of the intake camshaft 134
- a brake that is turned on in a braking state in which the driver of the vehicle depresses the brake pedal 121.
- Switch 122 internal combustion engine 101 as power source It is provided such as a vehicle speed sensor 123
- the ECU 114 inputs an on / off signal of an ignition switch 124 that is a main switch for operating / stopping the internal combustion engine 101 and an on / off signal of a starter switch 125.
- FIG. 2 shows the structure of the crank angle sensor 117 and the cam sensor 133.
- the crank angle sensor 117 is pivotally supported by the crankshaft 120 and has a signal plate 152 provided with a protrusion 151 as a detected portion around the crankshaft 120, and is fixed to the internal combustion engine 101 side.
- the crank angle sensor 117 detects the protrusion 151 and outputs a rotation signal POS. It is comprised with the rotation detection apparatus 153 to output.
- the rotation detection device 153 includes various processing circuits including a waveform generation circuit, a selection circuit, and the like together with a pickup that detects the protrusion 151, and the rotation signal POS output from the rotation detection device 153 is normally at a low level.
- This is a pulse signal composed of a pulse train that changes to a high level for a certain time when the protrusion 151 is detected.
- the protrusions 151 of the signal plate 152 are formed at equal intervals with a crank angle of 10 deg. However, a portion where two protrusions 151 are continuously missing is sandwiched between the rotation center of the crankshaft 120. It is provided at two opposing locations.
- the number of protrusions 151 may be one, or three or more may be continuously deleted.
- the rotation signal POS output from the crank angle sensor 117 (rotation detection device 153) has continuously changed to a high level 16 times every 10 degrees (unit crank angle) in the crank angle as shown in FIG. After that, the low level is maintained for 30 deg, and then continuously changes to the high level 16 times again.
- the first rotation signal POS after the low level period (tooth missing region, missing portion) having a crank angle of 30 deg is output at intervals of the crank angle of 180 deg. This corresponds to the stroke phase difference between the cylinders in the cylinder engine 101, in other words, the ignition interval.
- the crank angle sensor 117 uses the piston position at 50 deg (BTDC 50 deg) before the top dead center of each cylinder after the first rotation signal POS after the low-level period (tooth missing region) at the crank angle of 30 deg. It is set to output.
- the cam sensor 133 is pivotally supported at the end of the intake camshaft 134 and is fixed to the internal combustion engine 101 side with a signal plate 158 provided with a protruding portion 157 as a detected portion around it, and detects the protruding portion 157. And a rotation detecting device 159 that outputs a cam signal PHASE.
- the rotation detection device 159 includes various processing circuits including a waveform shaping circuit and the like together with a pickup that detects the protrusion 157.
- the projections 157 of the signal plate 158 are provided at one, three, four, and two, respectively, at four positions of 90 deg in cam angle.
- the pitch of 157 is set to 30 deg in crank angle (15 deg in cam angle).
- the cam signal PHASE output from the cam sensor 133 (rotation detection device 159) is normally at a low level, and is detected from a pulse train that changes to a high level for a predetermined time by detecting the protrusion 157.
- Each pulse signal is changed to a high level with a cam angle of 90 deg and a crank angle of 180 deg.
- a single cam signal PHASE and a head signal of a plurality of cam signals PHASE that are continuously output are output at an interval of 180 deg at the crank angle, and one single signal, three consecutive, and four consecutive Two consecutive output patterns are output between the top dead center TDC of one cylinder and the top dead center TDC of the next cylinder.
- cam signals PHASE are continuously output between the compression top dead center TDC of the first cylinder and the compression top dead center TDC of the third cylinder, and the compression top dead center TDC of the third cylinder
- cam signals PHASE are continuously output between the compression top dead center TDC of the fourth cylinder
- the cam signal PHASE is output between the compression top dead center TDC of the fourth cylinder and the compression top dead center TDC of the second cylinder.
- Two signals PHASE are continuously output, and one cam signal PHASE is output between the compression top dead center TDC of the second cylinder and the compression top dead center TDC of the first cylinder.
- the cam signal PHASE is changed even when the valve timing is changed by providing a variable valve mechanism that makes the valve timing of the intake valve 105 variable by making the rotation phase of the intake camshaft 134 relative to the crankshaft 120 variable.
- the output position should not change across the top dead center TDC.
- the output position of the cam signal PHASE in anticipation of the valve timing change range so that the number of cam signals PHASE output between the top dead centers TDC does not change even if the valve timing is changed. And set the output interval.
- the continuous output number of the cam signal PHASE output between each top dead center TDC indicates the cylinder number that will be the compression top dead center next. For example, between the current top dead center TDC and the previous top dead center TDC.
- the current top dead center TDC indicates the compression top dead center TDC of the third cylinder.
- the output pattern of the cam signal PHASE output between the top dead center TDC is As shown in FIG. 3, it is set in the order of single, three continuous, four continuous, and two continuous.
- the ECU 114 determines, for example, the missing position of the rotation signal POS from the periodic change of the rotation signal POS, and counts the number of occurrences of the rotation signal POS with reference to this missing position, thereby obtaining a top dead center TDC (reference Crank angle position REF) is detected.
- the sixth rotation signal POS output after the missing region of the rotation signal POS corresponds to the top dead center TDC of each cylinder.
- the ECU 114 counts the number of cam signals PHASE output between the top dead centers TDC, thereby determining the cylinder whose piston position will be the compression top dead center TDC (predetermined piston position) and top dead center.
- the number of occurrences of the rotation signal POS from the TDC is counted, and the crank angle at that time is detected based on the count value CNTPOS.
- the ECU 114 determines the cylinder that performs fuel injection and ignition, and further determines the fuel injection timing and ignition timing, and the crankshaft that is detected based on the count value CNTPOS.
- An injection pulse signal and an ignition control signal are output according to the angle of 120 (crank angle).
- the discrimination result of the cylinder whose piston position becomes the compression top dead center TDC (predetermined piston position) is updated in the order of ignition, counting the number of outputs of the cam signal PHASE between the top dead centers TDC. Then, after the cylinder whose piston position is at the compression top dead center TDC (predetermined piston position) is determined, the cylinder at the compression top dead center TDC can be updated for each top dead center TDC in the order of ignition.
- the section for counting the number of occurrences of the cam signal PHASE is not limited to the top dead center TDC, and an arbitrary crank angle (piston position) is used as a reference for the section for counting the number of occurrences of the cam signal PHASE. be able to.
- the cylinder at the predetermined piston position can be determined based on the difference in the pulse width of the cam signal PHASE.
- a part of the pulse train of the rotation signal POS is omitted, so that the angular position (crank angle) of the crankshaft 120 can be detected based on the missing position.
- a reference position sensor that generates a signal at a reference crank angle position for every 180 degrees of crank angle is provided, and the rotation signal POS is counted based on the output signal of the reference position sensor.
- the angular position (crank angle) of the crankshaft 120 can also be detected.
- the generation of the rotation signal POS indicates that the crankshaft 120 has rotated in the forward rotation direction by 10 degrees, and rotation from the reference crank angle position.
- the number of occurrences of the signal POS indicates the rotation angle of the crankshaft 120 from the reference crank angle position.
- crankshaft 120 may reversely rotate due to in-cylinder compression pressure or the like, and the number of rotation signals POS generated during the reverse rotation is the same as during normal rotation. If counting continues, the angular position (crank angle) of the crankshaft 120 will be erroneously detected.
- crank angle sensor 117 rotates at different pulse widths during forward rotation and reverse rotation of the crankshaft 120 so that forward rotation / reverse rotation of the internal combustion engine 101 (crankshaft 120) can be determined.
- a signal POS pulse signal is output (see FIG. 4A).
- a method for generating pulse signals having different pulse widths depending on the rotation direction of the rotating shaft for example, a method disclosed in Japanese Patent Application Laid-Open No. 2001-165951 is used. Specifically, as detection pulse signals of the protrusions 151 of the signal plate 152, two signals whose phases are shifted from each other are generated, and these signals are compared to determine normal rotation / reverse rotation, and are different from each other. One of the two pulse signals generated with the pulse width WIPOS is selected and output based on the forward / reverse determination result.
- the ECU 114 measures the pulse width WIPOS of the rotation signal POS, and compares the measured pulse width WIPOS with the threshold SL, which is a forward / reverse determination threshold, to determine whether the pulse width WIPOS during forward rotation is obtained. Then, it is determined whether the pulse width WIPOS at the time of reverse rotation is obtained, and it is determined whether the crankshaft 120 is rotating forward or reversely.
- the threshold SL which is a forward / reverse determination threshold
- the threshold value SL used for forward / reverse rotation discrimination is set to an intermediate value (for example, 55 ⁇ s to 80 ⁇ s) between the pulse width WIPOS at the time of forward rotation and the pulse width WIPOS at the time of reverse rotation, and is larger than the pulse width WIPOS at the time of forward rotation.
- the pulse width WIPOS at the time of reverse rotation is long. If the pulse width WIPOS is equal to or greater than the threshold value SL, it is determined that the reverse state is established. If the pulse width WIPOS is less than the threshold value SL, the forward rotation state is established. Judge.
- the pulse width WIPOS during forward rotation is set to 45 ⁇ s and the pulse width WIPOS during reverse rotation is set to 90 ⁇ s, but the pulse width WIPOS is set to 45 ⁇ s as described above. , 90 ⁇ s.
- the pulse width WIPOS may be set to be larger during forward rotation than during reverse rotation.
- the rotation signal POS is a pulse signal that changes to a high level for a certain time when the rotation signal POS reaches a predetermined angular position at a normal low level.
- the low level period is set to be different in the rotation direction, and the length of the low level period is set to the pulse width WIPOS. Can be measured to determine the direction of rotation.
- normal rotation / reverse rotation can be discriminated by the difference in amplitude (signal level) so that the amplitude (signal level) of the rotation signal POS differs between normal rotation / reverse rotation. .
- the rotation signal POS is a pulse signal that changes to a high level for a certain period of time when it reaches a predetermined angular position at a normal low level, and when it reaches a predetermined angular position.
- the signal level is set to be higher at the time of forward rotation than at the time of reverse rotation. Specifically, it is set to output a signal of 5 V at the time of forward rotation and 2.5 V at the time of reverse rotation.
- the count value CNTPOS of the rotation signal POS is changed stepwise between “10” and “13” with the tooth missing portion interposed therebetween. This is a process for indicating the number of rotation signals POS generated when there is no missing tooth.
- the cylinder data at the predetermined piston position is updated in the order of the first cylinder ⁇ the third cylinder ⁇ the fourth cylinder ⁇ the third cylinder ⁇ the fourth cylinder.
- the internal combustion engine 101 reverses and returns again across the third cylinder top dead center TDC, and the first cylinder top dead center TDC and the third cylinder top dead center In this state, the rotation is switched from reverse rotation to normal rotation, and stopped across the top dead center TDC of the third cylinder.
- crank angle at the time of stop and the piston position of each cylinder at the time of stop can be determined even if the reverse rotation occurs immediately before the internal combustion engine 101 stops. It can be detected with high accuracy.
- the crank angle at the time of stop is determined when the internal combustion engine 101 is restarted. Assuming that the crankshaft 120 rotates as the initial position, the crank angle can be estimated from the start of the start, the cylinder at the predetermined piston position can be specified, and the fuel injection / ignition is started early to improve the start response. Can improve.
- crank angle at the time of stop is unknown, the crank angle is unknown from the start to the time when the reference crank angle position (the missing portion of the rotation signal POS) is detected for the first time, and the second reference crank angle. Since it is possible to determine the cylinder at the predetermined piston position by detecting the position, it is not possible to determine the cylinder for fuel injection and ignition until the second reference crank angle position is detected. Start is delayed.
- the ECU 114 automatically stops the internal combustion engine 101 when the automatic stop condition is satisfied while the internal combustion engine 101 is idling, and when the restart condition is satisfied after the internal combustion engine 101 is automatically stopped, It has an idle stop control function that automatically restarts.
- the crank angle at the time of stop and the cylinder at the predetermined piston position are stored, and these are the initial values. If the cylinder at the crank angle and the predetermined piston position is estimated as follows, fuel injection and ignition are started before detecting the cylinder at the crank angle and the predetermined piston position based on the rotation signal POS and the cam signal PHASE. Thus, high start response can be obtained.
- the vehicle speed VSP is 0 km / h
- the engine rotational speed NE is equal to or lower than a predetermined rotational speed
- the accelerator opening ACC is fully closed
- the brake switch 122 is ON (braking state)
- the cooling water temperature TW is predetermined.
- the predetermined rotation speed is a value for determining the idling operation state of the internal combustion engine 101, and is set slightly higher than the target idling rotation speed.
- the predetermined temperature is a state in which the engine 101 is completely warmed (warm-up). This is a value for permitting automatic stop in a later state.
- the brake switch 122 is switched to OFF (non-braking state)
- the accelerator pedal is depressed, or the duration time of the automatic stop state becomes longer than the reference time. If it is determined that the battery voltage has decreased, it is determined that the restart condition is satisfied, and the fuel injection / ignition for the internal combustion engine 101 is resumed.
- the internal combustion engine 101 when restarting from a stopped state by idle stop control, the internal combustion engine 101 is started to rotate using a starter motor.
- FIG. 6 shows a state in which the crank angle (count value CNTPOS) when the internal combustion engine 101 is stopped and a cylinder at a predetermined piston position are stored, and fuel injection / ignition is controlled based on these stored data when restarting.
- the internal combustion engine 101 stops before the compression top dead center of the first cylinder, and the crank angle position at the time of stop is a position 50 deg (BTDC 50 deg) before the compression top dead center of the first cylinder. It is.
- the rotation signal POS is generated at the start of the start
- the count value CNTPOS having the initial value as the value at the time of stop is counted up
- the compression top dead center of the first cylinder is detected from the count up result, and the first
- the data of the cylinder that will be the next compression top dead center is updated to the third cylinder, and the count value CNTPOS is reset to 0 at the top dead center position, based on the count value CNTPOS.
- the rotation angle after the top dead center can be estimated, and the energization start timing to the ignition coil is determined based on the count value CNTPOS.
- the count value CNTPOS is updated based on the value at the time of the previous operation stop to estimate the crank angle at that time, but the rotation signal POS
- the crank angle at that time is determined to be ATDC 130 deg (BTDC 50 deg) independently of the estimation result based on the stored data at the time of stop, and thereafter, this determined position is used as a reference.
- the crank angle is detected by updating the count value CNTPOS.
- the second top dead center is detected based on the rotation signal POS from the determined position based on the count value, and the first top dead center and 2 after the start.
- the cylinder before the compression top dead center is determined from the number of cam signals PHASE output between the first top dead center and the second top dead center.
- CYL indicates the cylinder number before compression top dead center
- CYL1 indicates the cylinder detected by counting the number of cam signals PHASE
- CYL2 indicates each piston position at the time of stop.
- the result estimated as a cylinder before compression top dead center is shown as a reference.
- the forward / reverse determination of the crankshaft 120 is performed by comparing the pulse width WIPOS of the rotation signal POS with the threshold value SL.
- the measured value of the pulse width WIPOS of the rotation signal POS is Fluctuations may occur due to variations in output of the crank angle sensor 117 (rotation detection device 153), and variations in the circuit of the ECU 114 that measures the pulse width WIPOS, and this may reduce the accuracy of forward / reverse discrimination. is there.
- the crank angle at the time of stop and the cylinder at the predetermined piston position are erroneously detected, and the cylinder at the time of stop and the cylinder at the predetermined piston position are erroneously detected.
- Estimating the crank angle and the cylinder at the predetermined piston position after starting as a reference if the fuel injection / ignition at the time of restart is controlled based on the estimated value, the fuel injection / ignition is performed at the wrong cylinder or timing It will be.
- FIG. 5B shows the change in the count value CNTPOS when the reverse rotation cannot be detected and the forward rotation state is determined even during the reverse rotation, and the cylinder discrimination result before the compression top dead center. .
- the count value CNTPOS indicating the rotation angle after the top dead center is increased in spite of the reverse rotation state.
- the top dead center position is erroneously detected, and the cylinder before the compression top dead center is erroneously determined.
- stop position is erroneously determined, as shown in FIG. 7, by estimating the crank angle after restart and the cylinder before compression top dead center based on the stop position, fuel injection / Ignition is performed and abnormal combustion such as backfire occurs.
- FIG. 7 shows that although the internal combustion engine 101 actually stopped before the compression top dead center of the first cylinder, the reverse rotation could not be detected, so the internal combustion engine 101 stopped before the compression top dead center of the third cylinder. Shows the case of false detection.
- the fourth cylinder Before the compression top dead center of the third cylinder, the fourth cylinder is in the middle of the intake stroke and the second cylinder is in the middle of the exhaust stroke. Therefore, in the example shown in FIG. Based on the memory that the internal combustion engine 101 is stopped, fuel is injected into the fourth cylinder and the second cylinder at the time of restart. Actually, however, the internal combustion engine is in front of the compression top dead center of the first cylinder. 101 is stopped and the fourth cylinder that has injected fuel is actually in the exhaust stroke, and the fourth cylinder is ignited in the intake stroke, causing abnormal combustion such as backfire. End up.
- the stop position of the internal combustion engine 101 is stored, the crank angle after starting and the cylinder at the predetermined piston position are estimated based on the stored value, and the fuel injection / ignition is controlled based on the estimation result.
- fuel injection / ignition can be started early and start response can be improved, if the reverse rotation that occurs immediately before stopping cannot be accurately determined, an error will occur in detection of the stop position, resulting in an incorrect cylinder during restart. As a result, fuel is injected and ignited, resulting in deterioration of exhaust properties at the time of restart.
- the ECU 114 diagnoses whether forward rotation / reverse rotation is normally determined based on the rotation signal POS, detects the crank angle based on the diagnosis result, and determines the fuel based on the detected crank angle. Control injection and ignition.
- step S501 the generation period TPOS of the rotation signal POS is measured as the time from the output of the previous rotation signal POS to the current rotation signal POS, and the pulse width WIPOS of the current rotation signal POS is measured.
- next step S502 it is determined whether or not an initial value “0” is set in the count start flag FCNT.
- step S503 it is determined whether or not the current rotation signal POS is the first rotation signal POS after starting.
- step S504 it is determined whether or not the value of the counter CNTPOSz, which is the count value of the rotation signal POS indicating the crank angle when the internal combustion engine 101 was previously stopped, is stored. To do.
- step S505 the counter CNTPOSz at the previous stop of operation Is set to the initial value of the counter CNTPOS.
- the counter CNTPOS can be updated every time the rotation signal POS is generated, and the crank angle at that time can be detected from the value of the counter CNTPOS.
- the count start flag FCNT By setting 1 to the count start flag FCNT, updating of the counter CNTPOS is permitted.
- next step S507 it is determined whether or not the value of the counter CNTPOS at the time of the previous operation stop is “10”.
- CNTPOS 10 is a value indicating the rotation signal POS output at BTDC 80 deg, and BTDC 80 deg is the output position of the rotation signal POS immediately before the tooth missing portion.
- the engine 101 has stopped in an angular region where the rotation signal POS is missing, and the internal combustion engine 101 is restarted by the starter motor. It can be estimated that the current rotation signal POS generated by normal rotation is the rotation signal POS immediately after the missing tooth region.
- step S508 when the value of the counter CNTPOSz at the time of the previous operation stop is “10”, the process proceeds to step S508, and “13” indicating the rotation signal POS immediately after the missing region is set in the counter CNTPOS.
- step S566 the process proceeds to step S516, and the counter CNTPOS having the initial value of the counter CNTPOSz at the time of the previous operation stop is increased by one.
- the previous value CNTPOSz in step S516 is the value of the counter CNTPOSz at the time of the previous operation stop if the first rotation signal POS is generated after the start of the start, and if it is the second time or later, the previous value CNTPOSz is the previously updated value. .
- step S518 the process proceeds to step S518 to reset the value of the counter CNTPOS to 0, and in the next step S519, the reference crank angle signal REF is output.
- the cylinder of the point is determined.
- the counter CNTPOS has a value indicating the rotation angle from the top dead center TDC in the forward rotation direction in units of 10 degrees.
- step S506 When the count start flag FCNT is set to 1 in step S506, when the next rotation signal POS is generated, the process proceeds from step S502 to step S514, but the value of the counter CNTPOSz at the time of the previous operation stop is stored. If not, the count start flag FCNT is held at 0. Therefore, when the next rotation signal POS is generated, the process proceeds from step S502 to step S503, and in step S503, it is determined that it is not the first time, and the process proceeds to step S509. It will be.
- the execution of the process of storing the value of the counter CNTPOSz at the time of operation stop can be limited to the case where the internal combustion engine 101 is automatically stopped by idle stop control. This is because, in automatic restart from the stop state by the idle stop control, a higher start response is required than when starting by the driver's key switch operation. In this case, the crank angle may have changed while the engine is stopped, and the crank angle position at the time of stop is different from the crank angle position immediately before the start of start. This is because if the angle is estimated, an erroneous estimation may be performed.
- step S509 it is determined whether or not the current rotation signal POS corresponds to the first rotation signal POS after the missing tooth region by comparing the previous value and the current value of the generation period TPOS of the rotation signal POS. .
- the generation period TPOS suddenly increases at the tooth missing position where the rotation signal POS is output at an interval of 30 deg at the crank angle, and therefore there is a large period change exceeding the change in the period TPOS due to the fluctuation of the rotation speed. In addition, it can be determined that this is a result of measuring a portion (tooth missing portion) where the current cycle TPSO is at intervals of 30 degrees.
- step S511 the count start flag FCNT is set to 1, and in step S512, the crank angle determination flag FDEC is set to 1.
- the crank angle determination flag FDEC retains the initial value 0 when the count start flag FCNT is set to 1 based on the value of the counter CNTPOSz at the time of the previous operation stop and the counter CNTPOS is started to be updated. On the other hand, if the counter CNTPOSz at the time of the previous operation stop is not stored and the update of the counter CNTPOS is started after detecting the first rotation signal POS after the missing region, it is set to 1.
- step S509 if it is determined that the current rotation signal POS does not correspond to the first rotation signal POS after the missing region, the process proceeds to step S513, where it is determined that the crank angle is unknown.
- the detection result that the crank angle is unknown is output until the first rotation signal POS after the tooth missing region is detected.
- the subsequent first rotation signal POS is detected, at that time, it can be determined that the crank angle is ATDC 130 deg (BTDC 50 deg), so the update of the counter CNTPOS is started from the next time.
- step S514 whether or not a stop command for the internal combustion engine 101 is generated, specifically, fuel injection / ignition is stopped. Determine whether or not.
- the stop command can be limited to automatic stop by idle stop control.
- step S515 as in step S509, by comparing the previous value and the current value of the generation period TPOS of the rotation signal POS, the current rotation signal POS corresponds to the first rotation signal POS after the tooth missing region. Determine whether or not.
- step S566 If the current rotation signal POS is not the first rotation signal POS after the missing region, the process proceeds to step S516, and the previous counter CNTPOS is incremented by 1 to obtain the current value.
- step S518 the process proceeds to step S518 to reset the value of the counter CNTPOS to 0, and in the next step S519, the reference crank angle signal REF is output.
- step S515 If it is determined in step S515 that the current rotation signal POS is the first rotation signal POS after the missing tooth region, the process proceeds to step S520.
- step S520 it is determined whether or not 1 is set in the crank angle determination flag FDEC.
- crank angle determination flag FDEC When the crank angle determination flag FDEC is set to 0, that is, the counter CNTPOSz when the internal combustion engine 101 is stopped is stored, and the counter CNTPOS is counted up after starting based on this stored value In the case, the process proceeds to step S521.
- step S521 it is determined whether or not the previous counter CNTPOSz, that is, the value counted up using the counter CNTPOSz at the previous operation stop as an initial value is in the vicinity of “10”.
- the counter CNTPOS When the counter CNTPOS is normally counted up, the counter CNTPOS is counted up to 10 when the rotation signal POS is output immediately before the tooth missing region, so the first rotation signal POS after the tooth missing region is output. At this point, the counter CNTPOS before the count-up process is normally “10”.
- the value of the counter CNTPOS does not correspond to the actual crank angle at the time of stop, and the counter CNTPOSz at the time of stop is restarted as an initial value. If the counter CNTPOS starts counting up sometimes, the crank angle at the time of start will be erroneously detected.
- the tooth loss of the rotation signal POS occurs at a constant crank angle, and the crankshaft 120 does not reverse in the cranking state by the starter motor, and continues normal rotation from the stop position.
- the crank angle is determined when the rotation signal POS is detected for the first time after the internal combustion engine 101 is started.
- the value of the counter CNTPOS at the time of detecting the missing tooth of the rotation signal POS in other words, the estimated crank angle based on the position when the operation is stopped is not “10” corresponding to the missing tooth position.
- the crank angle estimated with reference to the crank angle at the time of stop deviates from the actual crank angle.
- step S521 it is determined whether or not the absolute value of the difference between the previous counter CNTPOSz and the expected value of 10 is less than or equal to an allowable value ESL (eg, 1 to 3).
- the allowable value ESL is set based on an angle that is generated as an error in the stop position of the internal combustion engine 101 even in a state where the normal rotation / reverse rotation can be accurately determined. When it occurs, it is stored in advance so that the difference between the previous counter CNTPOSz and the expected value exceeds the allowable value ESL.
- the abnormality diagnosis result is held until it is determined in step S521 that the absolute value of the difference between the previous counter CNTPOSz and the expected value of 10 is less than the allowable value, or repair / adjustment at a maintenance shop. It is better to be able to forcibly reset along with the work.
- the warning to the driver is performed, for example, by turning on a warning lamp 171 provided near the driver's seat of the vehicle, and the driver can be informed of the occurrence of abnormality by voice guidance or the like.
- the fail processing it is possible to prohibit the determination of fuel injection / ignition timing based on the estimation result of the crank angle with the crank angle at the time of stop as an initial value, or to prohibit the idle stop control. Details will be described later.
- step S521 if it is determined in step S521 that the absolute value of the difference between the previous counter CNTPOSz and the expected value 10 is equal to or less than the allowable value ESL, the forward / reverse determination function is normal and the internal combustion engine 101 It is determined that the reverse rotation just before the stop has been correctly determined, and the process proceeds to step S523, bypassing step S522.
- step S523 1 is set to the crank angle determination flag FDEC based on the detection of the current missing region.
- step S524 “13”, which is a value corresponding to the first rotation signal POS after the missing tooth region, is set in the counter CNTPOS.
- step S520 If it is determined in step S520 that the crank angle determination flag FDEC is set to “1”, that is, the missing tooth area has been detected before the previous time, and the detection of the missing tooth area this time is restarted.
- the process proceeds to step S524, bypassing steps S521 to S523, and the counter CNTPOS is set to “13. "Is set.
- step S514 If it is determined in step S514 that a stop command for the internal combustion engine 101 has been generated (stop command is generated by idle stop control), the process proceeds to step S525.
- step S525 the pulse width WIPOS of the rotation signal POS is compared with the threshold value SL, and if the pulse width WIPOS is equal to or larger than the threshold value SL, it is determined that the crankshaft 120 is reversed, and the pulse width WIPOS is less than the threshold value SL. If there is, it is determined that the crankshaft 120 is rotating forward.
- step S5 the counter CNTPOS is counted up every time the rotation signal POS is generated, and reset to “0” when the counter CNTPOS reaches “18”. Repeat the process.
- step S526 it is determined whether or not the previous value CNTPOSz of the counter CNTPOS is zero.
- step S527 the counter CNTPOS value is decreased by 1 from the previous value CNTPOSz, and this routine is executed after the crank angle has been returned by reverse rotation. It ends as it is.
- step S527 it is determined that the current rotation signal POS is the rotation signal POS immediately before the missing tooth region, and in step S527, the counter CNTPOS is set to “10”.
- step S528 If the previous value CNTPOSz is “0”, the process proceeds to step S528, and the value of the counter CNTPOS is reset to “17”, which is the value immediately before the counter CNTPOS is reset to 0 during normal rotation.
- the counter CNTPOS changes as follows: 17 ⁇ 0 ⁇ 1 ⁇ 2... 17 ⁇ 0 ⁇ .
- the step is changed to “17”, and the countdown is performed every time the rotation signal POS is generated from “17”.
- step S529 the reference crank angle signal REF is output.
- the value of the counter CNTPOS when the internal combustion engine 101 is stopped can be stored in the nonvolatile memory.
- step S522 fail processing when abnormality occurs in forward / reverse rotation determination, that is, specific processing contents in step S522 will be described with reference to the flowchart of FIG.
- step S701 it is determined whether or not the crank angle determination flag FDEC is 1.
- step S704 fuel injection / ignition timing is determined based on the counter CNTPOS, and fuel injection / ignition is performed.
- step S702 if the crank angle confirmation flag FDEC is 0, the tooth missing region has not been detected since the start of starting, and the crank angle has not been confirmed, the process proceeds to step S702.
- step S702 it is determined whether or not the internal combustion engine 101 is automatically restarted by the idle stop control.
- the demand for the start response is low compared to the automatic restart of the internal combustion engine 101 by the idle stop control. Even if the fuel injection / ignition is started after waiting for the detection of the missing region of the rotation signal POS from the start of the ranking, sufficient start response can be obtained.
- step S705 determines the timing of fuel injection / ignition. Is prohibited.
- step S702 if it is determined in step S702 that the internal combustion engine 101 is automatically restarted by the idle stop control, the process proceeds to step S703.
- step S703 it is determined whether the forward / reverse rotation of the crankshaft 120 is normal or abnormal based on the pulse width WIPOS of the rotation signal POS.
- the crank angle when the internal combustion engine 101 is stopped can be accurately detected based on the normal rotation / reverse rotation determination, and the crank angle can be accurately detected. If it can be detected, the cylinder at the predetermined piston position at the time of stopping can be correctly detected. For this reason, the crank angle and the cylinder at the predetermined piston position can be accurately estimated based on the position information at the time of stoppage from the start of the start until the detection of the tooth missing region of the rotation signal POS, and early fuel injection / ignition is performed. The start response can be improved.
- step S703 if it is determined in step S703 that normal rotation / reverse rotation of the crankshaft 120 can be normally determined, the process proceeds to step S704 to estimate the crank angle after the start of starting with the crank angle at the time of stop as an initial value. Based on the result, and based on the cylinder that is estimated to be the predetermined piston position after starting with reference to the cylinder at the predetermined piston position at the time of stop, the fuel injection / ignition is performed before the detection of the missing region.
- the crank angle at the time when the internal combustion engine 101 is stopped and the cylinder of the predetermined piston position When the detection accuracy is lowered and the crank angle at the start and the cylinder at the predetermined piston position are estimated with the crank angle at the stop and the cylinder at the predetermined piston position as initial values, the cylinder at the crank angle and the predetermined piston position is erroneously determined. Become.
- fuel injection / ignition is controlled based on the wrong crank angle and the cylinder at the predetermined piston position, fuel injection / ignition is performed at a timing different from the intended timing and in the wrong cylinder, resulting in abnormal combustion. (Afterburning, backfire, etc.) are generated, and exhaust properties and startability are deteriorated.
- step S705 if there is an abnormality in the forward / reverse determination of the crankshaft 120, the process proceeds to step S705, and fuel injection / ignition control is prohibited. Accordingly, if there is an abnormality in the forward / reverse rotation determination, even when the internal combustion engine 101 is automatically restarted by the idle stop control, as in the case of the internal combustion engine 101 being started by the driver's key operation, Until the detection of the missing region of the rotation signal POS after the start, the crank angle is confirmed and the crank angle confirmation flag FDEC is set to 1, the process proceeds to step S704, the crank angle is confirmed, After the cylinder at the predetermined piston position is determined by the count of the rotation signal POS (counter CNTPOS) based on the region, fuel injection / ignition is performed.
- step S703 If it is determined in step S703 that there is an abnormality in the forward rotation / reverse rotation determination and the process proceeds to step S705, the fuel injection / ignition at the timing already determined before determining the abnormality is stopped. Shall.
- FIG. 11 is similar to the example shown in FIG. 7, since the internal combustion engine 101 actually stopped before the compression top dead center of the first cylinder, but the reverse rotation could not be determined. In the case where it is erroneously detected that the internal combustion engine 101 has stopped before the dead center, the timing for diagnosing reverse rotation determination abnormality and the state of ignition stop processing based on the diagnosis are shown.
- the ignition for the fourth cylinder is stopped based on the abnormality determination, and the ignition is performed during the intake stroke. The occurrence of backfire is avoided.
- the flowchart of FIG. 12 shows the processing of the ECU 114 that prohibits the idle stop control when an abnormality occurs in the forward / reverse determination.
- the flowchart of FIG. 12 shows a routine in which the ECU 114 performs an interruption every predetermined time (for example, 10 ms).
- step S801 it is determined whether or not the crank angle determination flag FDEC is 1.
- crank angle determination flag FDEC is 1
- the process proceeds to step S802, and it is determined whether a condition for automatically stopping the internal combustion engine 101 by the idle stop control is satisfied.
- step S803 when the automatic stop condition of the internal combustion engine 101 by the idle stop control is satisfied, the process proceeds to step S803, and the normal rotation / reverse rotation determination of the crankshaft 120 based on the pulse width WIPOS of the rotation signal POS is normal. It is judged whether or not it is abnormal.
- step S806 If the forward / reverse determination can be performed normally, the process proceeds to step S806, and the operation of the internal combustion engine 101 is automatically stopped by stopping the fuel injection and ignition.
- the crank angle at the time of stopping and the cylinder at the predetermined piston position can be detected approximately accurately. . Therefore, when the internal combustion engine 101 is automatically restarted, the crank angle is estimated using the crank angle at the time of stop as an initial value, and the cylinder at the predetermined piston position is based on the cylinder that was at the predetermined piston position at the time of stop. Therefore, the crank angle at that time and the cylinder at the predetermined piston position can be determined substantially accurately before the start of the detection of the tooth missing area of the rotation signal POS after the start of starting, and the fuel injection / ignition timing is determined accurately. Thus, fuel injection / ignition can be started early.
- crank angle at the time of stop can be detected almost accurately, and based on this, fuel injection / ignition can be started early at the time of restart, so that automatic stop of the internal combustion engine 101 by idle stop control is permitted. .
- the fuel injection / ignition timing is determined by determining the fuel injection / ignition timing based on the crank angle estimated with the crank angle at the time of stop as the initial value.
- step S805 fuel injection / ignition is continued even if the automatic stop condition of the internal combustion engine 101 by the idle stop control is satisfied.
- the operation of the internal combustion engine 101 is continued without automatically stopping the internal combustion engine 101.
- step S802 When it is determined in step S802 that the automatic stop condition of the internal combustion engine 101 by the idle stop control is not satisfied, that is, when it is requested to continue the operation of the internal combustion engine 101, the process proceeds to step S805, where fuel injection / Continue ignition.
- step S801 If it is determined in step S801 that the crank angle determination flag FDEC is 0, in other words, if it is between the start of start and the detection of the tooth missing area of the rotation signal POS, the process proceeds to step S804. Then, it is determined whether or not the internal combustion engine 101 is restarted from the automatic stop state by the idle stop control.
- step S805 fuel injection / ignition based on the crank angle at the time of stop and the cylinder at the predetermined piston position estimated from the cylinder at the predetermined piston position is performed. Let it be done.
- the idling stop control is performed in a state in which the reverse rotation can be detected with high accuracy and the stop position can be detected with high accuracy, the crank angle immediately after the start and the predetermined piston position based on the stop position when restarting with the idling stop control. Since the fuel injection / ignition can be controlled with high accuracy, it is possible to accurately detect the cylinder of the rotation signal POS and determine the crank angle and the cylinder at the predetermined piston position. Inject and ignite.
- step S804 the fuel injection / ignition is prohibited, and the cylinder at the crank angle and the predetermined piston position is determined. After that, fuel injection / ignition is started.
- the driver may be warned that the idle stop control is prohibited by turning on a warning light. preferable.
- a warning operation such as lighting of a warning lamp is immediately performed, and a fail process for coping with the abnormality is executed.
- the failure determination can be confirmed and the warning lamp can be turned on.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Abstract
Description
Claims (9)
- 内燃機関のクランクシャフトの正転・逆転を判別する正転・逆転判別ユニットと、
前記正転・逆転判別ユニットによる正転・逆転の判別に基づき、前記内燃機関の停止時のクランク角を検出する停止位置検出ユニットと、
前記停止位置検出ユニットが検出した停止時のクランク角を基準として推定したクランク角と、前記内燃機関の始動開始後に検出したクランク角とを比較して、前記正転・逆転判別ユニットの異常の有無を判定する診断ユニットと、
を備えた内燃機関の制御装置。 - 前記正転・逆転判別ユニットが、前記クランクシャフトの単位角度毎に出力される回転信号であって、前記クランクシャフトの正転・逆転で異なる回転信号に基づいて、前記クランクシャフトの正転・逆転を判別し、
前記停止位置検出ユニットが、正転・逆転の判別に応じて前記回転信号を計数することで、停止時のクランク角を検出する請求項1記載の内燃機関の制御装置。 - 前記診断ユニットが、前記内燃機関の始動時に、前記停止位置検出ユニットが検出した停止時のクランク角を基準に前記回転信号を計数してクランク角を推定し、前記内燃機関の始動開始後に基準クランク角を検出したときの前記クランク角の推定値に基づいて、前記正転・逆転判別ユニットの異常の有無を判定する請求項2記載の内燃機関の制御装置。
- 予め設定された停止条件の成立時に前記内燃機関を自動的に停止し、予め設定された再始動条件の成立時に、前記内燃機関を自動的に再始動するアイドルストップ制御ユニットと、
前記アイドルストップ制御ユニットが前記内燃機関を再始動する場合に、前記停止位置検出ユニットが検出した停止時のクランク角を基準として推定したクランク角に基づいて前記内燃機関を制御する始動制御ユニットと、
前記診断ユニットが正転・逆転判別ユニットの異常を判定した場合に、前記アイドルストップ制御ユニットが前記内燃機関を自動的に停止させる制御又は前記始動制御ユニットが停止時のクランク角の推定値に基づき前記内燃機関を制御する動作を禁止する制御禁止ユニットと、
を更に備えた請求項1記載の内燃機関の制御装置。 - 前記診断ユニットが、前記クランク角の推定値と前記基準クランク角との差が許容値よりも大きい場合に、前記正転・逆転判別ユニットが異常であると判定する請求項3記載の内燃機関の制御装置。
- 前記回転信号が、前記クランクシャフトの単位角度毎のパルス列からなるパルス信号であり、かつ、前記パルス信号のパルス幅が前記クランクシャフトの正転・逆転で異なり、
前記正転・逆転判別ユニットが、前記回転信号のパルス幅の計測値と閾値とを比較して、前記クランクシャフトの正転・逆転を判別する請求項2記載の内燃機関の制御装置。 - 前記診断ユニットが前記正転・逆転判別ユニットの異常を判定した場合に、異常発生を警告する警告ユニットを更に備えた請求項1記載の内燃機関の制御装置。
- 前記回転信号が、所定のクランク角で部分的に欠落するように予め設定され、
前記診断ユニットが、前記回転信号の欠落部分を前記回転信号の発生周期に基づいて検出し、欠落部分を基準にして基準クランク角を検出する請求項3記載の内燃機関の制御装置。 - 内燃機関のクランクシャフトの正転・逆転を判別し、
前記正転・逆転の判別に基づき、前記内燃機関の停止時のクランク角を検出し、
前記検出した停止時のクランク角を基準として推定したクランク角と、前記内燃機関の始動開始後に検出したクランク角とを比較して、前記正転・逆転の判断における異常の有無を判定する、内燃機関の制御方法。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/575,652 US9133776B2 (en) | 2010-01-28 | 2011-01-28 | Control apparatus and control method for internal-combustion engine |
CN201180007268.2A CN102725502B (zh) | 2010-01-28 | 2011-01-28 | 内燃机的控制装置和控制方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010016295A JP5165705B2 (ja) | 2010-01-28 | 2010-01-28 | 内燃機関の制御装置 |
JP2010-016295 | 2010-01-28 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/575,652 Continuation US9133776B2 (en) | 2010-01-28 | 2011-01-28 | Control apparatus and control method for internal-combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011093462A1 true WO2011093462A1 (ja) | 2011-08-04 |
Family
ID=44319441
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2011/051787 WO2011093462A1 (ja) | 2010-01-28 | 2011-01-28 | 内燃機関の制御装置及び制御方法 |
Country Status (4)
Country | Link |
---|---|
US (1) | US9133776B2 (ja) |
JP (1) | JP5165705B2 (ja) |
CN (1) | CN102725502B (ja) |
WO (1) | WO2011093462A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111219280A (zh) * | 2019-04-17 | 2020-06-02 | 株式会社电装 | 发动机起动系统及其控制方法 |
Families Citing this family (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5470241B2 (ja) * | 2010-12-28 | 2014-04-16 | 日立オートモティブシステムズ株式会社 | 車両の制御装置 |
JP5255712B1 (ja) * | 2012-03-06 | 2013-08-07 | 三菱電機株式会社 | エンジン自動停止再始動装置 |
JP5956794B2 (ja) * | 2012-03-19 | 2016-07-27 | 日立オートモティブシステムズ株式会社 | 内燃機関の制御装置 |
JP5849810B2 (ja) * | 2012-03-23 | 2016-02-03 | トヨタ自動車株式会社 | 内燃機関の制御装置 |
JP5693786B2 (ja) * | 2012-04-03 | 2015-04-01 | 三菱電機株式会社 | 内燃機関の自動停止再始動装置 |
US20140100763A1 (en) * | 2012-10-10 | 2014-04-10 | Michitaka FUJIWARA | Engine automatic stop and restart apparatus and method of automatically stopping and restarting engine |
JP5978904B2 (ja) * | 2012-10-11 | 2016-08-24 | 株式会社デンソー | エンジン制御装置 |
FR2999042B1 (fr) * | 2012-11-30 | 2016-10-21 | Continental Automotive France | Procede de traitement d'un signal fourni par un capteur bidirectionnel et dispositif correspondant |
US8975848B2 (en) * | 2013-03-15 | 2015-03-10 | Regal Beloit America, Inc. | Methods and systems for starting an electric motor |
DE102013206641B3 (de) * | 2013-04-15 | 2014-05-22 | Robert Bosch Gmbh | Verfahren zur Durchführung wenigstens einer Lernfunktion in einem Kraftfahrzeug und Mittel zu dessen Implementierung |
EP2990283B1 (en) * | 2013-04-26 | 2017-10-25 | Toyota Jidosha Kabushiki Kaisha | Startup control device |
JP6024603B2 (ja) * | 2013-06-13 | 2016-11-16 | トヨタ自動車株式会社 | 内燃機関の制御装置 |
JP5967043B2 (ja) * | 2013-09-17 | 2016-08-10 | 株式会社デンソー | 回転角センサ、および、それを含む回転角検出システム |
JP5892133B2 (ja) * | 2013-09-17 | 2016-03-23 | 株式会社デンソー | 回転角検出システム |
DE102014203538A1 (de) * | 2014-02-27 | 2015-08-27 | Robert Bosch Gmbh | Verfahren zur geräuschmindernden Steuerung von schaltbaren Ventilen, insbesondere von Einspritzventilen einer Brennkraftmaschine eines Kraftfahrzeugs |
JP6179440B2 (ja) * | 2014-03-28 | 2017-08-16 | トヨタ自動車株式会社 | 車両制御装置 |
JP6458453B2 (ja) * | 2014-11-05 | 2019-01-30 | 株式会社デンソー | 内燃機関の制御装置 |
FR3033051B1 (fr) * | 2015-02-24 | 2017-02-10 | Continental Automotive France | Procede et dispositif de traitement d'un signal produit par un capteur de rotation d'une cible tournante |
CN105569863B (zh) * | 2015-12-31 | 2018-06-19 | 广州汽车集团股份有限公司 | 发动机喷油控制方法及发动机电控单元 |
KR101795306B1 (ko) * | 2016-10-07 | 2017-11-07 | 현대자동차주식회사 | 차량 시동 제어 방법 |
SE541683C2 (en) | 2016-12-19 | 2019-11-26 | Scania Cv Ab | Cylinder Detection in a Four-stroke Internal Combustion Engine |
JP6642459B2 (ja) * | 2017-01-13 | 2020-02-05 | トヨタ自動車株式会社 | 車両の制御装置 |
JP2018197530A (ja) * | 2017-05-24 | 2018-12-13 | トヨタ自動車株式会社 | エンジンの制御装置 |
KR20190068979A (ko) * | 2017-12-11 | 2019-06-19 | 현대자동차주식회사 | 크랭크 포지션 투쓰 넘버 업데이트 방법 |
KR102463459B1 (ko) | 2017-12-27 | 2022-11-04 | 현대자동차주식회사 | 차량의 엔진 시동성능 향상 방법 |
KR102085896B1 (ko) * | 2018-12-07 | 2020-03-06 | 현대오트론 주식회사 | 파워트레인 엔진 정밀 제어방법 및 이에 의해 운용되는 자동차 |
JP7111050B2 (ja) * | 2019-04-10 | 2022-08-02 | トヨタ自動車株式会社 | 内燃機関の制御装置 |
JP7489173B2 (ja) * | 2019-05-16 | 2024-05-23 | 日立Astemo株式会社 | モータ制御装置およびモータ制御方法、並びにこれらを用いた可変バルブタイミング制御装置及び可変バルブタイミング制御方法 |
JP7443172B2 (ja) * | 2020-07-01 | 2024-03-05 | 株式会社アイシン | 弁開閉時期制御装置 |
CN114320621B (zh) * | 2021-12-21 | 2023-03-03 | 联合汽车电子有限公司 | 一种发动机控制方法、装置、存储介质和设备 |
TWI823708B (zh) * | 2022-12-09 | 2023-11-21 | 光陽工業股份有限公司 | 引擎的啟動方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005233622A (ja) * | 2004-02-17 | 2005-09-02 | Toyota Motor Corp | 逆転検出機能付き回転検出装置 |
JP2006233914A (ja) * | 2005-02-25 | 2006-09-07 | Toyota Motor Corp | 内燃機関の制御装置 |
JP2009236003A (ja) * | 2008-03-27 | 2009-10-15 | Denso Corp | クランク角センサの異常診断装置 |
JP2010106661A (ja) * | 2008-10-28 | 2010-05-13 | Denso Corp | 内燃機関の異常診断装置、及びクランク軸の逆転有無判定装置 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3589143B2 (ja) * | 2000-03-21 | 2004-11-17 | 日産自動車株式会社 | 車両のアイドルストップ・再始動制御装置 |
US7142973B2 (en) * | 2004-06-11 | 2006-11-28 | Denso Corporation | Engine control apparatus designed to ensure accuracy in determining engine position |
JP4258448B2 (ja) * | 2004-07-20 | 2009-04-30 | トヨタ自動車株式会社 | 内燃機関の逆回転検出装置 |
JP2009024548A (ja) * | 2007-07-18 | 2009-02-05 | Mitsubishi Electric Corp | 内燃機関制御装置 |
JP4466720B2 (ja) * | 2007-11-12 | 2010-05-26 | 株式会社デンソー | エンジン制御装置 |
US7624712B1 (en) * | 2008-05-19 | 2009-12-01 | Ford Global Technologies, Llc | Approach for engine start synchronization |
-
2010
- 2010-01-28 JP JP2010016295A patent/JP5165705B2/ja active Active
-
2011
- 2011-01-28 CN CN201180007268.2A patent/CN102725502B/zh active Active
- 2011-01-28 WO PCT/JP2011/051787 patent/WO2011093462A1/ja active Application Filing
- 2011-01-28 US US13/575,652 patent/US9133776B2/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005233622A (ja) * | 2004-02-17 | 2005-09-02 | Toyota Motor Corp | 逆転検出機能付き回転検出装置 |
JP2006233914A (ja) * | 2005-02-25 | 2006-09-07 | Toyota Motor Corp | 内燃機関の制御装置 |
JP2009236003A (ja) * | 2008-03-27 | 2009-10-15 | Denso Corp | クランク角センサの異常診断装置 |
JP2010106661A (ja) * | 2008-10-28 | 2010-05-13 | Denso Corp | 内燃機関の異常診断装置、及びクランク軸の逆転有無判定装置 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111219280A (zh) * | 2019-04-17 | 2020-06-02 | 株式会社电装 | 发动机起动系统及其控制方法 |
Also Published As
Publication number | Publication date |
---|---|
JP5165705B2 (ja) | 2013-03-21 |
US20120303251A1 (en) | 2012-11-29 |
US9133776B2 (en) | 2015-09-15 |
CN102725502B (zh) | 2016-05-25 |
JP2011153586A (ja) | 2011-08-11 |
CN102725502A (zh) | 2012-10-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5165705B2 (ja) | 内燃機関の制御装置 | |
US8818685B2 (en) | Rotation detecting device and rotation detecting method | |
KR101795306B1 (ko) | 차량 시동 제어 방법 | |
JP2009024548A (ja) | 内燃機関制御装置 | |
US10619585B2 (en) | Method for controlling starting of vehicle upon failure of camshaft position sensor | |
JP5956794B2 (ja) | 内燃機関の制御装置 | |
JP5591390B2 (ja) | 回転検出装置 | |
US6874359B2 (en) | Control apparatus and control method of engine | |
JP6302822B2 (ja) | 内燃機関の制御装置 | |
JP2005351211A (ja) | エンジン制御装置 | |
JP2006291738A (ja) | 内燃機関の制御装置 | |
JP4410614B2 (ja) | エンジン制御装置 | |
JP2009236003A (ja) | クランク角センサの異常診断装置 | |
JP2009293580A (ja) | 可変バルブタイミング制御システムの異常診断装置 | |
JP2000073840A (ja) | 車両用内燃機関の燃料噴射制御装置 | |
JP4406324B2 (ja) | エンジン制御装置 | |
KR101947043B1 (ko) | 디젤 차량의 엔진 회전수 측정 시스템 및 그 방법 | |
JP2009025251A (ja) | 排出ガスセンサの異常診断装置 | |
JP2004060579A (ja) | 内燃機関の診断方法及び診断装置 | |
JP2024040818A (ja) | 内燃機関の失火検出装置 | |
JP2007056767A (ja) | 燃料供給装置の異常判定装置 | |
JP2010216429A (ja) | 内燃機関の制御装置 | |
WO2010089857A1 (ja) | 内燃機関の始動制御装置及び内燃機関の始動制御方法 | |
JP2014163284A (ja) | 内燃機関 | |
JP2008280903A (ja) | 車両用エンジンの制御装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201180007268.2 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11737172 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13575652 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 11737172 Country of ref document: EP Kind code of ref document: A1 |