WO2012140779A1 - エンジンの制御装置 - Google Patents
エンジンの制御装置 Download PDFInfo
- Publication number
- WO2012140779A1 WO2012140779A1 PCT/JP2011/059424 JP2011059424W WO2012140779A1 WO 2012140779 A1 WO2012140779 A1 WO 2012140779A1 JP 2011059424 W JP2011059424 W JP 2011059424W WO 2012140779 A1 WO2012140779 A1 WO 2012140779A1
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- WO
- WIPO (PCT)
- Prior art keywords
- engine
- predetermined value
- intake valves
- smaller
- engine brake
- Prior art date
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Classifications
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- 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
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/06—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for braking
- F01L13/065—Compression release engine retarders of the "Jacobs Manufacturing" type
-
- 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
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- 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
- F02B75/00—Other engines
- F02B75/04—Engines with variable distances between pistons at top dead-centre positions and cylinder heads
- F02B75/041—Engines with variable distances between pistons at top dead-centre positions and cylinder heads by means of cylinder or cylinderhead positioning
-
- 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
- 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
- F02D13/0257—Independent control of two or more intake or exhaust valves respectively, i.e. one of two intake valves remains closed or is opened partially while the other is fully opened
-
- 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
- F02D13/04—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation using engine as brake
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D15/00—Varying compression ratio
- F02D15/04—Varying compression ratio by alteration of volume of compression space without changing piston stroke
-
- 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
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/06—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for braking
-
- 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
- F01L2001/0471—Assembled camshafts
- F01L2001/0473—Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod
-
- 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
- F01L2800/06—Timing or lift different for valves of same cylinder
Definitions
- the present invention relates to an engine control apparatus, and in particular, among a plurality of intake valves provided for a combustion chamber, a valve operating apparatus capable of independently setting the phases of some intake valves and the phases of other intake valves.
- the present invention relates to an engine control device provided for an engine including
- Patent Document 1 discloses a valve operating device that changes valve timings of first and second engine valves that are the same kind of engine valves provided for one combustion chamber.
- Patent Document 2 or 3 discloses a technique that is considered to be related to the present invention in terms of control.
- an engine control apparatus that controls a variable phase cam control mechanism to reduce the cam phase difference and to reduce the throttle opening of the throttle valve when it is determined that the vehicle condition requires engine braking. It is disclosed.
- Patent Document 3 when the brake pedal is depressed and the vehicle decelerates, the intake valve closing timing is retarded as the brake pedal depression amount increases so that the intake air amount becomes constant.
- a control device for an internal combustion engine that reduces the throttle opening is disclosed.
- Patent Document 4 discloses a spark ignition type internal combustion engine having a mechanism.
- FIG. 14 is an example of a PV diagram during engine brake operation.
- FIG. 15 is a diagram showing the phases of the intake valves 2A and 2B corresponding to FIG.
- the PV diagram depicts a counterclockwise cycle, and the size of the area surrounded by the line in the PV diagram indicates the magnitude of the load acting as a negative load on the engine.
- the intake valves 2A and 2B are two intake valves provided for the same combustion chamber.
- the opening timing of the intake valve 2B is set in the intake stroke with the intake valve 2A being most retarded during engine braking.
- the state set corresponding to the start time (intake stroke top dead center) is shown.
- the engine when the engine is an engine mounted on a vehicle, for example, there is a possibility of giving the driver a feeling of deceleration more than necessary because the engine brake is strengthened. Further, when the engine is an engine mounted on a vehicle (for example, a hybrid vehicle) that regenerates kinetic energy at the time of braking, for example, there is a possibility that the regeneration efficiency may be reduced by the increase in engine braking.
- a vehicle for example, a hybrid vehicle
- the present invention includes a valve operating device capable of independently setting the phases of some of the intake valves and the phases of other intake valves among a plurality of intake valves provided to the combustion chamber.
- An object of the present invention is to provide an engine control device capable of controlling the size of an engine brake of an engine to an appropriate size.
- the present invention is provided for an engine having a valve operating device capable of independently setting the phases of some of the intake valves and the phases of other intake valves among a plurality of intake valves provided for the combustion chamber. And changing the phase of at least one of the intake valves and the other intake valves by controlling the valve operating device in accordance with the magnitude of the engine brake to be requested of the engine. It is an engine control apparatus provided with the control part to perform.
- the present invention may be configured such that the control unit advances the part of the intake valves to a greater degree as the size of the engine brake to be requested from the engine is smaller.
- the present invention may be configured such that the control unit at least partially advances the other intake valve to a greater degree as the size of the engine brake to be requested of the engine is smaller.
- the some intake valves and the other Of the intake valves can be advanced.
- the some intake valves and the other intake valves are advanced together.
- the some intake valves and the other intake valves are made smaller than when the engine brake is smaller than the first predetermined value. Both can be configured to be retarded.
- the some intake valves and the other intake valves are advanced, and When the magnitude of the engine brake to be requested of the engine is smaller than the first predetermined value, the advance angle is given priority to the some intake valves among the some intake valves and the other intake valves.
- the partial intake valves may be operated in a delayed manner when there is a phase difference with the other intake valves.
- the magnitude of the engine brake that the control unit should request from the engine is smaller than the second predetermined value that is smaller than the first predetermined value
- the magnitude is larger than the first predetermined value.
- the part of the intake valves and the other intake valves are advanced together so that the size of the engine brake to be requested of the engine is larger than the second predetermined value and more than the first predetermined value.
- the part of the intake valves and the other intake valves may be configured to advance.
- the partial phase advance amount is set to the first phase advance amount.
- the phase advance amount to be reached is As the first phase advance amount, the smaller the size of the engine brake to be demanded from the engine, the larger the degree of advancement of some of the intake valves and the magnitude of engine brake to be demanded from the engine.
- the other intake valve When the second intake value is smaller than a third predetermined value smaller than the second predetermined value, the other intake valve is advanced so that the phase advance amount becomes the second phase advance amount, and Require engine
- the magnitude of the engine brake is larger than the third predetermined value and smaller than the second predetermined value, the phase advance amount to be reached is requested to the engine as the second phase advance amount.
- the other intake valve can be advanced to a greater degree.
- the present invention may be configured such that the engine includes a variable compression ratio mechanism capable of changing a mechanical compression ratio.
- an engine provided with a valve operating device capable of independently setting the phases of some of the intake valves and the phases of other intake valves among the plurality of intake valves provided for the combustion chamber.
- the size of the engine brake can be controlled to an appropriate size.
- FIG. 4A and FIG. 4B are schematic diagrams of phase advance angle amount map data of the first embodiment. It is a figure which shows a 1st control operation with a flowchart. 6 (a) and 6 (b) are diagrams showing the phases of the intake valves corresponding to FIG. It is a figure which shows the engine brake of Example 1.
- FIG. 8A and FIG. 8B are PV diagrams during the engine braking operation of the first embodiment.
- FIGS. 9A and 9B are schematic diagrams of phase advance angle amount map data according to the second embodiment. It is a figure which shows a 2nd control operation with a flowchart.
- FIG. 12A and 12B are schematic diagrams of phase advance angle amount map data of the third embodiment. It is a figure which shows the engine brake of Example 3.
- FIG. It is an example of a PV diagram during engine brake operation. It is a figure which shows the phase of the intake valve corresponding to FIG.
- FIG. 1 is a schematic configuration diagram of the engine 1.
- the engine 1 is mounted on a vehicle (not shown).
- the engine 1 can be mounted on, for example, a hybrid vehicle that regenerates energy during deceleration.
- the engine 1 includes an intake valve 2 and an exhaust valve 3.
- a plurality (two in this case) of intake valves 2 and exhaust valves 3 are provided for the combustion chamber E.
- the engine 1 includes two intake valves 2, specifically, intake valves 2 ⁇ / b> A and 2 ⁇ / b> B.
- the engine 1 includes a first camshaft 10 and a second camshaft 20.
- the first camshaft 10 is provided on the intake valves 2A and 2B side
- the second camshaft 20 is provided on the exhaust valve 3 side.
- the second camshaft 20 includes an exhaust cam 21.
- the exhaust cam 21 is provided corresponding to the exhaust valve 3 and operates the exhaust valve 3.
- the first camshaft 10 is a dual-structure camshaft, and includes an external camshaft 11, an internal camshaft 12, an external cam 13, and an internal cam 14.
- the external camshaft 11 has a hollow structure.
- the inner camshaft 12 is inserted into the outer camshaft 11 so as to be relatively rotatable.
- the external cam 13 is provided on the external cam shaft 11.
- the external cam 13 is provided corresponding to the intake valve 2A, and operates the intake valve 2A.
- the inner cam 14 is slidable on the outer cam shaft 11 in the circumferential direction.
- the internal cam 14 is coupled to the internal camshaft 12.
- the internal cam 14 can be coupled to the internal camshaft 12 with a coupling pin through a long hole provided in the outer camshaft 11 along the circumferential direction.
- the internal cam 14 is provided corresponding to the intake valve 2B, and operates the intake valve 2B.
- VVT Variariable Valve Timing
- the VVT 30 is a valve operating device capable of independently setting the phase of the intake valve 2A, which is a part of the two intake valves 2, and the phase of the intake valve 2B, which is another intake valve.
- Such a valve operating apparatus may be realized by the valve operating apparatus disclosed in Patent Document 1, for example.
- Such a valve operating device can also be realized as a configuration having each of the electromagnetic driving devices when the intake valves 2A and 2B are driven electromagnetically.
- the VVT 30 changes the phase of at least one of the intake valves 2A and 2B by changing the phase of at least one of the outer camshaft 11 and the inner camshaft 12.
- the VVT 30 changes the phase of at least one of the outer camshaft 11 and the inner camshaft 12 by rotationally driving at least one of the outer camshaft 11 and the inner camshaft 12 by hydraulic pressure.
- hydraulic pressure can be supplied to the VVT 30 from a hydraulic pump that is driven by the output of the engine 1.
- the VVT 30 is configured so that the phase of the intake valves 2A and 2B can be changed as a whole by changing the phase of the first camshaft 10 as a whole. Further, by changing the phase between the outer camshaft 11 and the inner camshaft 12, the phase difference between the intake valves 2A and 2B can be changed.
- the VVT 30 can specifically change the phase of at least one of the intake valves 2A and 2B as follows, for example.
- the intake valves 2A and 2B are retarded as a whole, and the intake valve 2B is advanced relative to the intake valve 2A, so that at least the intake valve 2A of the intake valves 2A and 2B is retarded.
- the VVT 30 can at least retard the intake valve 2A so that the intake valve 2A is retarded relative to the intake valve 2B.
- the intake valve 2A is specifically an intake valve that operates later than the intake valve 2B when there is a phase difference with the intake valve 2B.
- FIG. 2 is a view showing the variable compression ratio mechanism 5.
- the engine 1 includes a variable compression ratio mechanism 5, a cylinder block 6, and a crankcase 7.
- the variable compression ratio mechanism 5 is provided between the cylinder block 6 and the crankcase 7.
- the variable compression ratio mechanism 5 makes the mechanical compression ratio variable by moving the cylinder block 6 in the vertical direction with respect to the crankcase 7.
- the variable compression ratio mechanism 5 moves the cylinder block 6 upward, the volume of the combustion chamber E increases.
- the mechanical compression ratio is reduced.
- the cylinder block 6 is moved downward, the volume of the combustion chamber E becomes smaller. As a result, the mechanical compression ratio is increased.
- the engine 1 lowers the actual compression ratio by, for example, slowly closing the intake valve 2A during idle operation. Further, the expansion ratio is increased by increasing the mechanical compression ratio. In slowly closing the intake valve 2A, the intake valve 2A can be retarded to the limit. In increasing the mechanical compression ratio, the mechanical compression ratio can be increased to a limit mechanical compression ratio that is a structural limit of the combustion chamber E.
- FIG. 3 is a schematic configuration diagram of the ECU 70A.
- the ECU 70 ⁇ / b> A is an electronic control device corresponding to an engine control device, and is provided for the engine 1.
- the ECU 70A includes a microcomputer including a CPU 71, a ROM 72, a RAM 73, and the like, and input / output circuits 75 and 76. These components are connected to each other via a bus 74.
- the ECU 70A includes a crank angle sensor 81 that can detect the rotational speed of the engine 1, an air flow meter 82 that measures the intake air amount of the engine 1, a phase sensor 83 that detects the phase of the external camshaft 11, A phase sensor 84 for detecting the phase of the camshaft 12, a brake sensor 85 for detecting the depression amount G of the brake pedal 91, and an accelerator opening sensor 86 for detecting the depression amount G 'of the accelerator pedal 92.
- Various sensors and switches are electrically connected.
- Various control objects such as the fuel injection valve 8 and the VVT 30 included in the engine 1 are electrically connected.
- the phases of the intake valves 2A and 2B can be detected based on the outputs of the phase sensors 83 and 84.
- the brake pedal 91 is a braking operation unit capable of performing a braking operation on the driving target of the engine 1, and the driving target of the engine 1 can be braked to a greater degree as the stepping amount G that is a braking operation amount is larger.
- the accelerator pedal 92 is an acceleration operation unit for making an acceleration request to the engine 1, and the acceleration request to the engine 1 can be made to a greater degree as the stepping amount G ′ that is an acceleration operation amount is larger.
- the ROM 72 is configured to store a program in which various processes executed by the CPU 71 are described, map data, and the like. Various functions are implemented in the ECU 70A by executing processing while the CPU 71 uses the temporary storage area of the RAM 73 as necessary based on the program stored in the ROM 72. In this regard, in the ECU 70A, for example, the following control unit is functionally realized.
- the control unit controls the VVT 30 to change the phase of at least one of the intake valves 2A and 2B.
- the control unit controls the VVT 30 according to, for example, the engine operating state. Further, the VVT 30 is controlled in accordance with the degree of engine brake (hereinafter referred to as “required engine brake”) that should be requested from the engine 1.
- Demand engine brake is an engine brake having a magnitude corresponding to the degree of braking required by the driver.
- the magnitude of the required engine brake can be grasped by the depression amount G. This is because the degree of braking required by the driver is reflected in the depression amount G. Therefore, when controlling the VVT 30 according to the magnitude of the required engine brake, the control unit specifically controls the VVT 30 according to the depression amount G corresponding to the magnitude of the required engine brake.
- the control unit takes in the intake air more than the case where it is larger than the first predetermined value ⁇ .
- the control unit includes the first predetermined value ⁇ with respect to the case where the required engine brake is smaller than the first predetermined value ⁇ , and the first predetermined value ⁇ . Control may be performed when the value ⁇ is equal to or greater than ⁇ .
- the control unit does not change the phase of the intake valves 2A, 2B in accordance with the magnitude of the requested engine brake. At least one of the intake valves 2A and 2B is advanced. As a result, when it is smaller than the first predetermined value ⁇ , at least one of the intake valves 2A, 2B is advanced when compared with the case where it is larger than the first predetermined value ⁇ .
- control unit retards the intake valve 2A at least when the acceleration request to the engine 1 is lost, so that the intake valve 2A is retarded from the intake valve 2B.
- the intake valve 2A is retarded more than the intake valve 2B by delaying at least the intake valve 2A continuously after the acceleration request is lost.
- the control unit specifically retards the intake valves 2A and 2B as a whole.
- the intake valve 2B is advanced relative to the intake valve 2A.
- the opening timing of the intake valve 2B is set in correspondence with the start of the intake stroke.
- the control unit specifically advances both the intake valves 2A and 2B.
- the intake valves 2A and 2B are both retarded as compared with the case where the required engine brake is smaller than the first predetermined value ⁇ .
- the control unit controls the VVT 30 during the engine brake operation of the engine 1.
- the control unit specifically controls the VVT 30 when the engine 1 is performing fuel cut as a result of the absence of acceleration request (depressing the accelerator pedal 92).
- the fuel cut is performed by the fuel injection control performed by the ECU 70A when the acceleration request is lost.
- the fuel injection control may be performed by an electronic control device other than the ECU 70A, for example.
- FIG. 4 (a) and 4 (b) are schematic diagrams of map data MA1 and MB1 of the phase advance amounts of the intake valves 2A and 2B provided in the ECU 70A.
- 4A shows map data MB1 of the phase advance amount of the intake valve 2B
- FIG. 4B shows map data MA1 of the phase advance amount of the intake valve 2A.
- the map data MA1 and MB1 are created based on the phase that is changed when the required engine brake magnitude is larger than the first predetermined value ⁇ .
- the first predetermined value ⁇ ′ is a value corresponding to the predetermined value ⁇ in the required engine brake in the depression amount G.
- the phase advance angle amount of the intake valve 2B is a predetermined second phase advance amount when the depression amount G is equal to or smaller than the first predetermined value ⁇ ′ (and therefore smaller than the first predetermined value ⁇ ′).
- the value is set to be a2.
- the phase advance amount of the intake valve 2A is set to be a predetermined value a1 that is the first phase advance amount when the depression amount G is equal to or less than the first predetermined value ⁇ ′.
- the predetermined values a1 and a2 may be the same size.
- the phase advance amounts of the intake valves 2A and 2B are set to be zero when the depression amount G is larger than the first predetermined value ⁇ ′.
- the control unit specifically detects the depression amount G and reads the phase advance amounts of the corresponding intake valves 2A and 2B with reference to the map data MA1 and MB1. Then, by controlling the VVT 30 so that the phase advance amount of the intake valves 2A and 2B becomes the read phase advance amount, the phases of the intake valves 2A and 2B are changed as described above.
- the control unit advances the intake valve 2A so that the phase advance amount becomes the predetermined value a1. Further, the intake valve 2B is advanced so that the phase advance amount becomes the predetermined value a2.
- the ECU 70A determines whether or not there is no acceleration request (step S1). If the determination is negative, this flowchart is temporarily terminated. On the other hand, if the determination is affirmative, the ECU 70A retards at least the intake valve 2A so that the intake valve 2A is retarded from the intake valve 2B (step S2).
- step S2 the ECU 70A specifically retards the intake valves 2A and 2B as a whole, and advances the intake valve 2B relative to the intake valve 2A.
- the opening timing of the intake valve 2B is set in correspondence with the start of the intake stroke.
- step S3 ECU 70A determines whether or not the engine brake is operating. Whether or not the engine brake is in operation can be determined based on whether or not fuel cut is being performed in the engine 1 as a result of switching from a state where there is an acceleration request to a state where there is no acceleration request. Whether or not fuel cut is being performed in the engine 1 can be determined based on fuel injection control performed by the ECU 70A. If the determination is negative, this flowchart is temporarily terminated. If the determination in step S3 is affirmative, the ECU 70A determines whether or not the stepping amount G is equal to or less than a first predetermined value ⁇ ′ (step S4). Thereby, it is determined whether or not the magnitude of the requested engine brake is smaller than the first predetermined value ⁇ .
- step S4 the ECU 70A advances the intake valve 2A relatively more than when the stepping amount G is greater than the first predetermined value ⁇ ′ (step S5). Further, the intake valve 2B is advanced more than the case where the depression amount G is larger than the first predetermined value ⁇ ′ (step S6). In steps S5 and S6, specifically, the intake valve that is changed when the depression amount G is larger than the first predetermined value ⁇ ′ (that is, when the required engine brake magnitude is larger than the first predetermined value ⁇ ).
- the intake valves 2A and 2B can be advanced with reference to the phases 2A and 2B.
- step S4 the ECU 70A relatively retards the intake valve 2A as compared with the case where the depression amount G is equal to or less than the first predetermined value ⁇ ′ (step S7). Further, the intake valve 2B is relatively retarded as compared with the case where the depression amount G is equal to or less than the first predetermined value ⁇ ′ (step S8). In this regard, in steps S7 and S8, specifically, at least the intake valve 2A can be retarded continuously after the acceleration request is lost.
- FIG. 6A and 6 (b) are diagrams showing phases of the intake valves 2A and 2B corresponding to the flowchart shown in FIG.
- FIG. 6A shows the phases of the intake valves 2A and 2B when the depression amount G is larger than the first predetermined value ⁇ ′.
- FIG. 6B shows the phases of the intake valves 2A and 2B when the depression amount G is equal to or less than the first predetermined value ⁇ ′.
- 6 (a) and 6 (b) it can be seen that the intake valves 2A and 2B are retarded in the case of FIG. 6 (a) than in the case of FIG. 6 (b).
- FIG. 6B it can be seen that the intake valves 2A, 2B are advanced more than in the case of FIG. 6A.
- the intake valve 2A As shown in FIG. 6A, as a result of the ECU 70A retarding the intake valve 2A, the intake valve 2A is in the most retarded state. This is due to the structural reason that the outer camshaft 11 and the inner camshaft 12 receive a torque reaction force during engine braking.
- the intake valve 2A of the intake valves 2A and 2B is closed late, and the operation is performed in a high expansion ratio cycle in which the expansion ratio is higher than the actual compression ratio.
- Fuel efficiency can be improved.
- the intake valve 2A is closed in advance while the engine brake is in operation, fuel efficiency can be improved from an early stage when the engine is shifted to idle operation.
- the actual engine brake may be excessive with respect to the required engine brake.
- the ECU 70A changes the phase of at least one of the intake valves 2A and 2B by controlling the VVT 30 in accordance with the magnitude of the requested engine brake. For this reason, the ECU 70A can control the size of the engine brake to an appropriate size.
- ECU 70A advances the angle of at least one of the intake valves 2A and 2B when the magnitude of the required engine brake is smaller than the first predetermined value ⁇ than when the required engine brake is larger than the first predetermined value ⁇ .
- the magnitude of the requested engine brake is smaller than the first predetermined value ⁇
- the magnitude of the requested engine brake is made relatively larger by advancing the intake valve 2A than when the magnitude is larger than the first predetermined value ⁇ .
- overexpansion can be suppressed.
- the engine brake size can be controlled to an appropriate size by relatively weakening the engine brake.
- the magnitude of the requested engine brake is smaller than the first predetermined value ⁇
- the magnitude of the requested engine brake is relatively increased by advancing the intake valve 2B as compared with the case where the magnitude is larger than the first predetermined value ⁇ .
- the valve lift amount at the start of the intake stroke can be relatively increased.
- the engine brake size can be controlled to an appropriate size by relatively weakening the engine brake.
- the ECU 70A specifically, when the magnitude of the requested engine brake is smaller than the first predetermined value ⁇ , than when the phase of the intake valves 2A, 2B is not changed according to the magnitude of the requested engine brake, At least one of the intake valves 2A and 2B is advanced.
- the ECU 70A delays the intake valve 2A more than the intake valve 2B by at least retarding the intake valve 2A. You can also As a result, the intake valve 2A of the intake valves 2A, 2B can be closed in advance in preparation for idle operation. As a result, it is possible to favorably improve the fuel efficiency from an early stage when shifting to idle operation.
- the ECU 70A advances both the intake valves 2A and 2B, so that the required engine brake is larger than the first predetermined value ⁇ .
- the intake valves 2A and 2B are both retarded as compared with the case where the value is smaller than the first predetermined value ⁇ . For this reason, the ECU 70A determines whether the required engine brake is relatively small or relatively large when controlling the engine brake to an appropriate size according to the required engine brake. Dividing into two cases, the magnitude of the engine brake can be quickly controlled to a large degree.
- FIG. 7 is a diagram showing the size of the engine brake according to the depression amount G.
- FIG. 8A and FIG. 8B are PV diagrams during engine braking.
- FIG. 8A shows a PV diagram in the case where the stepping amount G is equal to or less than the first predetermined value ⁇ ′.
- FIG. 8B shows a PV diagram when the stepping amount G is larger than the first predetermined value ⁇ ′.
- FIGS. 7, 8A and 8B show the size and PV diagram of the engine brake of the engine 1 to which the ECU 70A is applied.
- the engine 1 can relatively weaken the engine brake when the depression amount G is equal to or smaller than the first predetermined value ⁇ ′, compared to the case where it is larger than the first predetermined value ⁇ ′. Further, when the depression amount G is larger than the first predetermined value ⁇ ′, the engine brake can be relatively strengthened as compared with the case where it is equal to or smaller than the first predetermined value ⁇ ′. As a result, the size of the engine brake can be controlled to an appropriate size.
- the area from the area surrounded by the line in the PV diagram is larger than that in the case of FIG. 8B. While reducing the area of S1 and S2, the area can be reduced by the area of S3 by further reducing the pumping loss. Conversely, in the case of FIG. 8B, the area surrounded by the line in the PV diagram can be increased by the areas S1, S2, and S3 as compared to the case of FIG.
- the area reduction of the area S1 has the effect of suppressing overexpansion by advancing the intake valve 2A. Further, in the area reduction of the area S2, there is an effect of reducing the pumping loss by advancing at least the intake valve 2A of the intake valves 2A and 2B. In addition, in the area reduction of the area S3, an effect of reducing the pumping loss by advancing the intake valve 2B appears.
- the intake valve 2A can be largely closed late. As a result, for example, it is possible to favorably improve fuel efficiency during idling. However, in this case, for example, if the intake valve 2A is largely closed in advance, regardless of the magnitude of the required engine brake, if the magnitude of the required engine brake is relatively small, the actual engine The brake is particularly likely to be excessive. Therefore, the ECU 70A is suitable when the engine 1 is an engine including the variable compression ratio mechanism 5.
- the engine 1 has a structure in which the outer camshaft 11 and the inner camshaft 12 are subjected to torque reaction force during engine brake operation.
- the intake valve 2A is retarded at least during engine brake operation, When the valve 2A is retarded from the intake valve 2B, the intake valve 2A is most retarded.
- the required engine brake is relatively small, the actual engine brake tends to be particularly excessive with respect to the required engine brake.
- the ECU 70A is an engine in which the engine 1 includes a dual-structure camshaft 10 composed of the outer camshaft 11 and the inner camshaft 12, and the VVT 30 is at least one of the outer camshaft 11 and the inner camshaft 12.
- the valve gear in this case may be provided with two phase control mechanisms individually in the axial direction like the valve gear disclosed in Patent Document 1, for example.
- the intake valve 2A may be closed late when there is no acceleration request.
- the intake valve 2A is closed slowly when the acceleration request is lost, and as a result, the outer camshaft 11 and the inner camshaft 12 receive a torque reaction force during the engine brake operation. 2A becomes the most retarded state. Therefore, more specifically, the ECU 70A is suitable for a case where the intake valve 2A is retarded from the intake valve 2B by retarding at least the intake valve 2A when the acceleration request is lost. is there.
- the valve lift amount at the start of the intake stroke becomes zero or becomes extremely small, and therefore, the pumping loss increases as the intake air hardly flows into the cylinder.
- the required engine brake is relatively small, the actual engine brake tends to be particularly excessive with respect to the required engine brake.
- the ECU 70A when the magnitude of the requested engine brake is smaller than the first predetermined value ⁇ , the ECU 70A has a larger magnitude of the requested engine brake when the intake valve 2B is advanced than when the magnitude is larger than the first predetermined value ⁇ . It is suitable when the opening timing of the intake valve 2B is set corresponding to the start of the intake stroke when it is larger than the first predetermined value ⁇ .
- the ECU 70A controls the VVT 30 according to the requested engine brake when the engine 1 is performing fuel cut as a result of the absence of the acceleration request.
- the ECU 70A interrupts the relatively low acceleration state and the engine brake is activated, resulting in an increased feeling of engine braking. It can respond to the situation.
- the ECU 70A controls the VVT 30 according to the requested engine brake when the fuel cut is performed in the engine 1 as a result of the absence of the acceleration request, and the fuel cut is performed when the engine 1 no longer requests the acceleration. This is suitable when the engine is used.
- the ECU 70A controls the size of the engine brake to an appropriate size. Specifically, when the engine 1 is an engine mounted on a vehicle, the ECU 70A can suppress giving the driver a feeling of deceleration more than necessary. . Further, when the engine 1 is an engine mounted on a vehicle (for example, a hybrid vehicle) that regenerates kinetic energy during braking, it is possible to suppress a decrease in regeneration efficiency.
- a vehicle for example, a hybrid vehicle
- the ECU 70B which is the engine control device of the present embodiment is substantially the same as the ECU 70A except that the control unit is realized as described below. For this reason, the illustration of the ECU 70B is omitted. ECU 70B is provided for engine 1 instead of ECU 70A. In the ECU 70B, when the magnitude of the requested engine brake is smaller than the first predetermined value ⁇ , the phase of the intake valves 2A and 2B is changed as shown below instead of advancing both the intake valves 2A and 2B. To do.
- the intake valves 2A and 2B are advanced, and the required engine brake magnitude is larger than the first predetermined value ⁇ .
- the control unit preferentially advances the intake valve 2A out of the intake valves 2A and 2B.
- Both the intake valves 2A and 2B are advanced compared to the case where the value is larger than the first predetermined value ⁇ .
- the intake valves 2A and 2B are more than the case where the required engine brake is larger than the first predetermined value ⁇ .
- the intake valve 2A is advanced.
- the control unit includes the second predetermined value ⁇ with respect to the case where it is larger than the second predetermined value ⁇ , so that the magnitude of the required engine brake is smaller than the second predetermined value ⁇ and the second predetermined value ⁇ or more. Control may be performed in some cases.
- FIGS. 9A and 9B are schematic diagrams of map data MA2 and MB2 of phase advance amounts of the intake valves 2A and 2B provided in the ECU 70B.
- FIG. 9A shows map data MB2 of the phase advance amount of the intake valve 2B
- FIG. 9B shows map data MA2 of the phase advance amount of the intake valve 2A.
- the map data MA2 and MB2 are created on the basis of the case where the required engine brake magnitude is larger than the first predetermined value ⁇ .
- the second predetermined value ⁇ ′ is a value corresponding to the second predetermined value ⁇ in the required engine brake in the depression amount G.
- the map data MA2 is the same as the map data MA1.
- the phase advance amount of the intake valve 2B is determined when the depression amount G is equal to or smaller than the second predetermined value ⁇ ′ (and therefore smaller than the second predetermined value ⁇ ′).
- the predetermined value a2 is set. Further, it is set to be zero when it is larger than the second predetermined value ⁇ ′ including the case where it is larger than the first predetermined value ⁇ ′.
- the phase advance angle amount of the intake valve 2A is a predetermined value when the depression amount G is equal to or smaller than a first predetermined value ⁇ ′ including a case where the depression amount G is equal to or smaller than a second predetermined value ⁇ ′. It is set to be a1. Further, it is set to be zero when it is larger than the first predetermined value ⁇ ′.
- the control unit specifically detects the depression amount G and reads the phase advance amount of the corresponding intake valves 2A and 2B with reference to the map data MA2 and MB2. Then, by controlling the VVT 30 so that the phase advance amount of the intake valves 2A and 2B becomes the read phase advance amount, the phases of the intake valves 2A and 2B are changed as described above.
- the control unit controls the intake valve 2A so that the phase advance amount becomes the predetermined value a1 when the required engine brake is smaller than the first predetermined value ⁇ including the case where the required engine brake is smaller than the second predetermined value ⁇ . Advance the angle. Further, when the magnitude of the requested engine brake is smaller than the second predetermined value ⁇ , the intake valve 2B is advanced so that the phase advance amount becomes the predetermined value a2.
- step S3 determines whether or not the depression amount G is equal to or less than a first predetermined value ⁇ ′ (step S11). Thereby, it is determined whether or not the magnitude of the requested engine brake is smaller than the first predetermined value ⁇ .
- step S11 determines whether or not the depression amount G is equal to or less than a second predetermined value ⁇ ′ (step S12). Thereby, it is determined whether or not the magnitude of the requested engine brake is smaller than the second predetermined value ⁇ .
- step S12 If the determination in step S12 is affirmative, the ECU 70B advances the intake valve 2A relatively more than when the stepping amount G is greater than the first predetermined value ⁇ ′ (step S13). Further, the intake valve 2B is advanced more than the case where the depression amount G is larger than the first predetermined value ⁇ ′ (step S14). In steps S13 and S14, specifically, the intake valve that is changed when the depression amount G is larger than the first predetermined value ⁇ ′ (that is, when the required engine brake magnitude is larger than the first predetermined value ⁇ ).
- the intake valves 2A and 2B can be advanced with reference to the phases 2A and 2B.
- step S12 the ECU 70B advances the intake valve 2A relatively more than when the depression amount G is greater than the first predetermined value ⁇ ′ (step S15). Further, the intake valve 2B is relatively retarded as compared with the case where the depression amount G is equal to or smaller than the second predetermined value ⁇ ′ (step S16).
- steps S15 and S16 specifically, the intake valves 2A and 2B are advanced with reference to the phase of the intake valves 2A and 2B which is changed when the depression amount G is greater than the first predetermined value ⁇ ′.
- the intake valve 2B can be retarded relative to the intake valve 2A. At this time, the opening timing of the intake valve 2B can be set in correspondence with the start of the intake stroke.
- step S11 the ECU 70B relatively retards the intake valve 2A as compared with the case where the depression amount G is equal to or less than the first predetermined value ⁇ ′ (step S17). Further, the intake valve 2B is relatively retarded as compared with the case where the depression amount G is equal to or smaller than the second predetermined value ⁇ ′ (step S18). In steps S17 and S18, specifically, at least the intake valve 2A can be retarded continuously after the acceleration request is lost.
- FIG. 11 is a diagram showing the size of the engine brake according to the depression amount G.
- FIG. 11 shows the magnitude of the engine brake of the engine 1 to which the ECU 70B is applied.
- the engine 1 in the engine 1 to which the ECU 70B is applied, when the depression amount G is equal to or smaller than the second predetermined value ⁇ ′, the engine 1 is greater than the second predetermined value ⁇ ′ and the first predetermined value ⁇ ′.
- the engine brake can be made relatively weaker than in the following cases.
- the ECU 70B can more appropriately control the magnitude of the engine brake than the ECU 70A in that the magnitude of the engine brake can be appropriately controlled in a stepwise manner according to the magnitude of the requested engine brake. it can.
- the ECU 70B can appropriately control the size of the engine brake in a stepwise manner as described below.
- the intake valve 2A that operates late when there is a phase difference has a greater influence on the strength of the engine brake than the intake valve 2B in the late closed state.
- the ECU 70B advances the intake valves 2A and 2B when the required engine brake magnitude is smaller than the first predetermined value ⁇ , and the required engine brake magnitude is smaller than the first predetermined value ⁇ .
- the intake valve 2A is preferentially advanced.
- the ECU 70B can preferentially weaken the engine brake to a large degree when the depression is weakened after the brake pedal 91 is stepped down greatly. For this reason, for example, when the engine 1 is an engine mounted on a vehicle that regenerates kinetic energy at the time of braking, the ECU 70B performs engine braking in a stepwise manner while suitably suppressing a decrease in regeneration efficiency. This is preferable in that it can be controlled to an appropriate size.
- the ECU 70B conversely retards the intake valve 2B, which has a relatively small effect on the engine brake, of the intake valves 2A and 2B. Can do.
- the intake valve 2B of the intake valves 2A and 2B can be advanced.
- the ECU 70B is preferable in that, for example, when the engine 1 is an engine mounted on a vehicle, the engine brake can be controlled to an appropriate size in a stepwise manner while suppressing the driver from feeling uncomfortable. It is.
- the ECU 70C which is the engine control device of the present embodiment, has the points that the phase advance amounts of the intake valves 2A and 2B are set as shown below, and the controller is realized as shown below. Other than the above, it is substantially the same as the ECU 70B. For this reason, the illustration of the ECU 70C is omitted. ECU 70C is provided for engine 1 instead of ECU 70A.
- FIG. 12 (a) and 12 (b) are diagrams schematically showing map data MA3 and MB3 of the phase advance amounts of the intake valves 2A and 2B provided in the ECU 70C. More specifically, FIG. 12A shows map data MB3 of the phase advance amount of the intake valve 2B, and FIG. 12B shows map data MA3 of the phase advance amount of the intake valve 2A.
- the map data MA3 and MB3 are created on the basis of the case where the requested engine brake is larger than the first predetermined value ⁇ .
- the phase advance amount of the intake valve 2B is set as follows when the depression amount G is equal to or less than the second predetermined value ⁇ ′. That is, when the depression amount G is equal to or smaller than the third predetermined value ⁇ ′, which is smaller than the second predetermined value ⁇ ′ (thus, smaller than the third predetermined value ⁇ ′), the predetermined value a2 is obtained. Is set to Further, when the stepping amount G is larger than the third predetermined value ⁇ ′ and equal to or smaller than the second predetermined value ⁇ ′, the phase advance amount to be reached is set to the predetermined value a2, and the stepping amount G is small. It is set to become larger. And it is set so that it may become zero when the depression amount G is larger than the second predetermined value ⁇ ′ including the case where it is larger than the first predetermined value ⁇ ′. The third predetermined value ⁇ ′ may be zero.
- the phase advance amount of the intake valve 2A is set to be a predetermined value a1 when the depression amount G is equal to or smaller than a second predetermined value ⁇ ′. Further, when the stepping amount G is larger than the second predetermined value ⁇ ′ and equal to or smaller than the first predetermined value ⁇ ′, the amount of phase advance angle to be reached is set to the predetermined value a1, and the stepping amount G is small. It is set to become larger. And it is set so that it may become zero when the depression amount G is larger than the first predetermined value ⁇ ′.
- the control unit is realized as shown below. That is, when the required engine brake is larger than the second predetermined value ⁇ and smaller than the first predetermined value ⁇ , the intake valve 2A is advanced to a greater degree as the required engine brake is smaller. Horn. As a result, the intake valve 2A is advanced by a greater degree as the required engine brake is at least partially smaller.
- the control unit advances the intake valve 2B as follows.
- the phase The intake valve 2B is advanced so that the advance amount becomes a predetermined value a2. Further, when the magnitude of the required engine brake is larger than the third predetermined value ⁇ and smaller than the second predetermined value ⁇ , the intake valve 2B is advanced by a greater degree as the magnitude of the required engine brake is smaller. Let As a result, the intake valve 2B is advanced by a greater degree as the required engine brake is at least partially smaller.
- the control unit when the magnitude of the requested engine brake is larger than the second predetermined value ⁇ and smaller than the first predetermined value ⁇ , the control unit more specifically sets the phase advance amount to be reached to the predetermined value.
- the intake valve 2A is advanced by a larger degree as the required engine brake is smaller.
- the required engine brake magnitude is larger than the third predetermined value ⁇ and smaller than the second predetermined value ⁇
- the amount of phase advance angle to be reached is set to the predetermined value a2
- the required engine brake magnitude is set. Is smaller, the intake valve 2B is advanced by a larger degree.
- the control unit includes the third predetermined value ⁇ with respect to the case where it is larger than the third predetermined value ⁇ , so that the required engine brake magnitude is smaller than the third predetermined value ⁇ and more than the third predetermined value ⁇ . Control may be performed in some cases.
- FIG. 13 is a diagram showing the size of the engine brake according to the depression amount G.
- FIG. 13 shows the magnitude of the engine brake of the engine 1 to which the ECU 70C is applied.
- the stepping amount G is larger than the second predetermined value ⁇ ′ and not more than the first predetermined value ⁇ ′
- the stepping amount G is small.
- the engine brake can be weakened gradually. Further, even when the depression amount G is larger than the third predetermined value ⁇ ′ and smaller than or equal to the second predetermined value ⁇ ′, the engine brake can be gradually weakened as the depression amount G is smaller.
- the ECU 70C By advancing the intake valve 2A to a large degree, at least partially, the strength of the engine brake can be made to continuously follow the size of the requested engine brake. As a result, the size of the engine brake can be controlled more appropriately than in the case of the ECU 70B.
- the ECU 70C determines that the required engine brake is small when the required engine brake is larger than the third predetermined value ⁇ and smaller than the second predetermined value ⁇ (that is, at least partially). By advancing the intake valve 2B to a greater degree, at least partially, the strength of the engine brake can be made to continuously follow the size of the requested engine brake. As a result, the size of the engine brake can be controlled more appropriately than in the case of the ECU 70B.
- the ECU 70C advances the intake valve 2A so that the phase advance angle amount becomes the predetermined value a1, and the magnitude of the requested engine brake is the first magnitude. 2 is set to a predetermined value a1, and the intake valve 2A is set to a greater degree as the required engine brake is smaller. Advance. Further, when the magnitude of the required engine brake is smaller than the third predetermined value ⁇ , the intake valve 2B is advanced so that the phase advance amount becomes the predetermined value a2, and the magnitude of the required engine brake is third.
- the phase advance amount to be reached is set to a predetermined value a2 when the required engine brake is smaller, and the intake valve 2B is advanced to a greater degree when the required value is larger than the predetermined value ⁇ and smaller than the second predetermined value ⁇ . Horn.
- the ECU 70C specifically changes the phase of the intake valves 2A and 2B in this way, and considers the difference in the effect on the strength of the engine brake as in the case of the ECU 70B.
- the size of the engine brake can be controlled more appropriately.
- the change in the amount of depression G change in the size of the requested engine brake
- a torque shock can be prevented from occurring in the engine 1.
- the magnitude of the required engine brake becomes zero.
- the ECU 70C is suitable in that it can prevent the occurrence of torque shock in the engine 1 and can make the size of the engine brake in consideration of the difference in influence on the strength of the engine brake. .
- Engine 1 Intake valve 2, 2A, 2B Variable compression ratio mechanism 5 First camshaft 10 External camshaft 11 Internal camshaft 12 VVT 30 ECU 70A, 70B, 70C
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Abstract
Description
吸気弁 2、2A、2B
可変圧縮比機構 5
第1のカムシャフト 10
外部カムシャフト 11
内部カムシャフト 12
VVT 30
ECU 70A、70B、70C
Claims (9)
- 燃焼室に対して設けられた複数の吸気弁のうち、一部の吸気弁の位相と他の吸気弁の位相とを独立して設定可能な動弁装置を備えるエンジンに対して設けられ、
前記エンジンに要求すべきエンジンブレーキの大きさに応じて前記動弁装置を制御することで、前記一部の吸気弁および前記他の吸気弁のうち、少なくとも一方の吸気弁の位相を変更する制御部を備えるエンジンの制御装置。 - 請求項1記載のエンジンの制御装置であって、
前記制御部が少なくとも部分的に、前記エンジンに要求すべきエンジンブレーキの大きさが小さい場合ほど、前記一部の吸気弁を大きな度合いで進角させるエンジンの制御装置。 - 請求項1記載のエンジンの制御装置であって、
前記制御部が少なくとも部分的に、前記エンジンに要求すべきエンジンブレーキの大きさが小さい場合ほど、前記他の吸気弁を大きな度合いで進角させるエンジンの制御装置。 - 請求項1から3いずれか1項記載のエンジンの制御装置であって、
前記制御部が前記エンジンに要求すべきエンジンブレーキの大きさが第1の所定値より小さい場合に、前記第1の所定値より大きい場合よりも前記一部の吸気弁および前記他の吸気弁のうち、少なくとも一方の吸気弁を進角させるエンジンの制御装置。 - 請求項4記載のエンジンの制御装置であって、
前記制御部が前記エンジンに要求すべきエンジンブレーキの大きさが前記第1の所定値より小さい場合に、前記一部の吸気弁と前記他の吸気弁とをともに進角させることで、前記エンジンに要求すべきエンジンブレーキの大きさが前記第1の所定値より大きい場合に、前記第1の所定値より小さい場合よりも、前記一部の吸気弁と前記他の吸気弁とをともに遅角させるエンジンの制御装置。 - 請求項4記載のエンジンの制御装置であって、
前記制御部が前記エンジンに要求すべきエンジンブレーキの大きさが前記第1の所定値より小さい場合に、前記一部の吸気弁と前記他の吸気弁とを進角させるとともに、前記エンジンに要求すべきエンジンブレーキの大きさが前記第1の所定値より小さくなる場合に、前記一部の吸気弁および前記他の吸気弁のうち、前記一部の吸気弁を優先して進角させ、
前記一部の吸気弁が前記他の吸気弁との間で位相差がある場合に遅れて作動するエンジンの制御装置。 - 請求項6記載のエンジンの制御装置であって、
前記制御部が前記エンジンに要求すべきエンジンブレーキの大きさが前記第1の所定値よりも値が小さい第2の所定値より小さい場合に、前記第1の所定値より大きい場合よりも、前記一部の吸気弁と前記他の吸気弁とをともに進角させ、
前記エンジンに要求すべきエンジンブレーキの大きさが前記第2の所定値より大きく、且つ前記第1の所定値より小さい場合に、前記第1の所定値より大きい場合よりも、前記一部の吸気弁および前記他の吸気弁のうち、前記一部の吸気弁を進角させるエンジンの制御装置。 - 請求項7記載のエンジンの制御装置であって、
前記制御部が前記エンジンに要求すべきエンジンブレーキの大きさが前記第2の所定値より小さい場合に、位相進角量が第1の位相進角量になるように前記一部の吸気弁を進角させるとともに、前記エンジンに要求すべきエンジンブレーキの大きさが前記第2の所定値より大きく、且つ前記第1の所定値より小さい場合に、到達すべき位相進角量を前記第1の位相進角量として、前記エンジンに要求すべきエンジンブレーキの大きさが小さい場合ほど、前記一部の吸気弁を大きな度合いで進角させ、
前記エンジンに要求すべきエンジンブレーキの大きさが前記第2の所定値よりも値が小さい第3の所定値より小さい場合に、位相進角量が第2の位相進角量になるように前記他の吸気弁を進角させるとともに、前記エンジンに要求すべきエンジンブレーキの大きさが前記第3の所定値より大きく、且つ前記第2の所定値より小さい場合に、到達すべき位相進角量を前記第2の位相進角量として、前記エンジンに要求すべきエンジンブレーキの大きさが小さい場合ほど、前記他の吸気弁を大きな度合いで進角させるエンジンの制御装置。 - 請求項1から8いずれか1項記載のエンジンの制御装置であって、
前記エンジンが機械圧縮比を変更可能な可変圧縮比機構を備えるエンジンの制御装置。
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EP20110863588 EP2698509B1 (en) | 2011-04-15 | 2011-04-15 | Engine control apparatus |
US13/882,439 US8869772B2 (en) | 2011-04-15 | 2011-04-15 | Engine control apparatus |
CN201180050996.1A CN103180556B (zh) | 2011-04-15 | 2011-04-15 | 发动机的控制装置 |
PCT/JP2011/059424 WO2012140779A1 (ja) | 2011-04-15 | 2011-04-15 | エンジンの制御装置 |
JP2013509723A JP5510610B2 (ja) | 2011-04-15 | 2011-04-15 | エンジンの制御装置 |
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- 2011-04-15 CN CN201180050996.1A patent/CN103180556B/zh not_active Expired - Fee Related
- 2011-04-15 JP JP2013509723A patent/JP5510610B2/ja active Active
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Also Published As
Publication number | Publication date |
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JPWO2012140779A1 (ja) | 2014-07-28 |
US20130220272A1 (en) | 2013-08-29 |
EP2698509A4 (en) | 2014-07-23 |
US8869772B2 (en) | 2014-10-28 |
CN103180556A (zh) | 2013-06-26 |
CN103180556B (zh) | 2015-06-10 |
EP2698509B1 (en) | 2015-05-20 |
EP2698509A1 (en) | 2014-02-19 |
JP5510610B2 (ja) | 2014-06-04 |
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