IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0711826
(2007-02-28)
|
등록번호 |
US-RE41758
(2010-10-21)
|
우선권정보 |
JP-11-334526(1999-11-25); JP-2000-089771(2000-03-28); JP-2000-316425(2000-10-17) |
발명자
/ 주소 |
- Ogiso, Makoto
- Saitoh, Mitsuru
- Matsumoto, Isao
|
출원인 / 주소 |
- Toyota Jidosha Kabushiki Kaisha
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
12 |
초록
▼
An internal combustion engine is provided with a variable valve train capable of altering opening and closing timings and/or opening amounts of at least one of an intake valve and an exhaust valve of an internal combustion engine. The internal combustion engine is characterized in that the internal
An internal combustion engine is provided with a variable valve train capable of altering opening and closing timings and/or opening amounts of at least one of an intake valve and an exhaust valve of an internal combustion engine. The internal combustion engine is characterized in that the internal combustion engine is further provided with a negative pressure mechanism that operates using intake pipe negative pressure generated in an intake passage of the internal combustion engine, a throttle valve for adjusting the flow rate of intake air flowing through the intake passage, and negative pressure generating device that controls at least one of the variable valve train and the throttle valve to generate the intake pipe negative pressure, when the intake pipe negative pressure for operation of the negative pressure mechanism is insufficient.
대표청구항
▼
What is claimed is: 1. An internal combustion engine comprising: a variable valve train capable of adjusting at least one of an opening and closing timing and an opening amount of at least one of an intake valve and an exhaust valve of the internal combustion engine; a negative pressure mechanism
What is claimed is: 1. An internal combustion engine comprising: a variable valve train capable of adjusting at least one of an opening and closing timing and an opening amount of at least one of an intake valve and an exhaust valve of the internal combustion engine; a negative pressure mechanism that operates using an intake pipe negative pressure generated in an intake passage of the internal combustion engine; a throttle valve for adjusting a flow rate of intake air flowing through the intake passage; and a negative pressure generating device that controls at least one of the variable valve train and the throttle valve to generate an intake pipe negative pressure when a predetermined condition is satisfied, wherein the negative pressure generating device controls the variable valve train so as to increase pump efficiency of the internal combustion engine and also closes the throttle valve by a predetermined amount, when a negative pressure for operation of the negative pressure mechanism is insufficient. 2. The internal combustion engine according to claim 1, wherein the negative pressure generating device controls the variable valve train so as to increase pump efficiency of the internal combustion engine and also closes the throttle valve by a predetermined amount, when a vehicle provided with the internal combustion engine is running in a deceleration state. 3. The internal combustion engine according to claim 1, wherein the variable valve train drives at least one of the intake valve and the exhaust valve to open and close using electromagnetic force. 4. An internal combustion engine comprising: a variable valve train capable of adjusting at least one of an opening and closing timing and an opening amount of at least one of an intake valve and an exhaust valve of the internal combustion engine; a negative pressure mechanism that operates using an intake pipe negative pressure generated in an intake passage of the internal combustion engine; a throttle valve for adjusting a flow rate of intake air flowing through the intake passage; and a negative pressure generating device that controls at least one of the variable valve train and the throttle valve to generate an intake pipe negative pressure when a predetermined condition is satisfied, wherein the negative pressure generating device controls the variable valve train and the throttle valve so as not to generate torque variation of the internal combustion engine, when the intake pipe negative pressure is to be generated. 5. An internal combustion engine comprising: a variable valve train capable of adjusting at least one of an opening and closing timing and an opening amount of at least one of an intake valve and an exhaust valve of the internal combustion engine; a negative pressure mechanism that operates using an intake pipe negative pressure generated in an intake passage of the internal combustion engine; a throttle valve for adjusting a flow rate of intake air flowing through the intake passage; and a negative pressure generating device that controls at least one of the variable valve train and the throttle valve to generate an intake pipe negative pressure when a predetermined condition is satisfied, wherein the negative pressure generating device controls the variable valve train and the throttle valve such that required torque for the internal combustion engine matches actual torque thereof, when the intake pipe negative pressure is to be generated. 6. The internal combustion engine according to claim 5, wherein the required torque is determined by using a number of revolutions of the internal combustion engine and an accelerator opening amount as parameters. 7. An internal combustion engine comprising: a variable valve train capable of adjusting at least one of an opening and closing timing and an opening amount of at least one of an intake valve and an exhaust valve of the internal combustion engine; a negative pressure mechanism that operates using an intake pipe negative pressure generated in an intake passage of the internal combustion engine; a throttle valve for adjusting a flow rate of intake air flowing through the intake passage; a throttle valve controller that closes the throttle valve by a predetermined amount when a predetermined condition is satisfied; and a valve train controller that, in a case where the throttle valve controller closes the throttle valve by the predetermined amount, controls the variable valve train so as to alter at least one of the opening and closing timing and the opening amount of at least one of the intake valve and the exhaust valve with respect to a case where the throttle valve controller does not close the throttle valve by the predetermined amount. 8. The internal combustion engine according to claim 7, wherein the valve train controller controls the variable valve train such that required torque for the internal combustion engine matches actual torque thereof, when the throttle valve controller closes the throttle valve by the predetermined amount. 9. The internal combustion engine according to claim 8, wherein the required torque is determined by using a number of revolutions of the internal combustion engine and an accelerator opening amount as parameters. 10. The internal combustion engine according to claim 7, wherein the valve train controller controls the variable valve train so as to suppress torque variation of the internal combustion engine, when the throttle valve controller closes the throttle valve by the predetermined amount. 11. The internal combustion engine according to claim 7, wherein the negative pressure mechanism is an evaporation fuel reflux mechanism for refluxing evaporation fuel generated in a fuel tank into the intake passage, and the throttle valve controller closes the throttle valve by the predetermined amount when the evaporation fuel reflux mechanism needs to be operated. 12. The internal combustion engine according to claim 7, wherein the variable valve train drives at least one of the intake valve and the exhaust valve to open and close using electromagnetic force. 13. An internal combustion engine comprising: a variable valve train capable of adjusting at least one of an opening and closing timing and an opening amount of at least one of an intake valve and an exhaust valve of the internal combustion engine; a negative pressure mechanism that operates using an intake pipe negative pressure generated in an intake passage of the internal combustion engine; a throttle valve for adjusting a flow rate of intake air flowing through the intake passage; a throttle valve controller that closes the throttle valve by a predetermined amount when a predetermined condition is satisfied; and an intake air amount controller that controls the variable valve train to adjust an intake air amount of the internal combustion engine while retaining the throttle valve at a predetermined opening amount, when the internal combustion engine is in a predetermined operating state, wherein the throttle valve controller closes the throttle valve by the predetermined amount when the predetermined condition is satisfied while the intake air amount controller is controlling the intake air amount of the internal combustion engine. 14. The internal combustion engine according to claim 13, further comprising a valve train controller that controls the variable valve train such that the intake air amount of the internal combustion engine does not change when the throttle valve controller closes the throttle valve by the predetermined amount. 15. An internal combustion engine comprising: a variable valve train capable of adjusting at least one of an opening and closing timing and an opening amount of at least one of an intake valve and an exhaust valve of the internal combustion engine; a negative pressure mechanism that operates using an intake pipe negative pressure generated in an intake passage of the internal combustion engine; a throttle valve for adjusting a flow rate of intake air flowing through the intake passage; a throttle valve controller that closes the throttle valve by a predetermined amount when a predetermined condition is satisfied; and a valve train controller that, in a case where the throttle valve controller closes the throttle valve by the predetermined amount, controls the variable valve train so as to alter at least one of the opening and closing timing and the opening amount of at least one of the intake valve and the exhaust valve with respect to a case where the throttle valve controller does not close the throttle valve by the predetermined amount. 16. The internal combustion engine according to claim 15, wherein the valve train controller controls the variable valve train such that required torque for the internal combustion engine matches actual torque thereof, when the throttle valve controller closes the throttle valve by the predetermined amount. 17. The internal combustion engine according to claim 16, wherein the required torque is determined by using a number of revolutions of the internal combustion engine and an accelerator opening amount as parameters. 18. The internal combustion engine according to claim 15, wherein the valve train controller controls the variable valve train so as to suppress torque variation of the internal combustion engine, when the throttle valve controller closes the throttle valve by the predetermined amount. 19. The internal combustion engine according to claim 15, wherein the variable valve train drives at least one of the intake valve and the exhaust valve to open and close using electromagnetic force. 20. An internal combustion engine comprising: a variable valve train capable of adjusting at least one of an opening and closing timing and an opening amount of at least one of an intake valve and an exhaust valve of the internal combustion engine; a negative pressure mechanism that operates using an intake pipe negative pressure generated in an intake passage of the internal combustion engine; a throttle valve for adjusting a flow rate of intake air flowing through the intake passage; an intake air amount controller that controls the variable valve train to adjust an intake air amount of the internal combustion engine while retaining the throttle valve at a predetermined opening amount, when an operating state of the internal combustion engine is in a predetermined operating region; and a throttle valve controller that closes the throttle valve by a predetermined amount from the predetermined opening amount when a predetermined condition is satisfied while the intake air amount controller is controlling the intake air amount of the internal combustion engine. 21. The internal combustion engine according to claim 20, wherein the variable valve train drives at least one of the intake valve and the exhaust valve to open and close using electromagnetic force. 22. An internal combustion engine comprising: a variable valve train capable of adjusting at least one of an opening and closing timing and an opening amount of at least one of an intake valve and an exhaust valve of an internal combustion engine; a negative pressure mechanism that operates using an intake pipe negative pressure generated in an intake passage of the internal combustion engine; a throttle valve for adjusting a flow rate of intake air flowing through the intake passage; an intake air amount controller that controls the variable valve train to adjust an intake air amount of the internal combustion engine while retaining the throttle valve at a predetermined opening amount, when an operating state of the internal combustion engine is in a predetermined operating region; an evaporation fuel reflux mechanism that refluxes evaporation fuel generated in a fuel tank of the internal combustion engine into the intake passage; and a throttle valve controller that closes the throttle valve by a predetermined amount from the predetermined opening amount when the evaporation fuel reflux mechanism needs to be operated while the intake air amount controller is controlling the intake air amount of the internal combustion engine. 23. The internal combustion engine according to claim 22, wherein the variable valve train drives at least one of the intake valve and the exhaust valve to open and close using electromagnetic force. 24. An internal combustion engine comprising: a variable valve train capable of adjusting at least one of an opening timing, a closing timing and an opening amount of at least one of an intake valve and an exhaust valve of the internal combustion engine; a throttle valve that adjusts a flow rate of an intake air flowing through an intake passage of the internal combustion engine; a throttle valve controller that closes the throttle valve by a predetermined amount when a predetermined condition is satisfied; and a valve train controller that, if the throttle valve is closed by the predetermined amount when the internal combustion engine is operating in a non-throttle control state, in which the variable valve train is controlled so that an amount of intake air reaches a desired value, controls the variable valve train in order to suppress torque variation of the internal combustion engine. 25. The internal combustion engine according to claim 24, wherein the valve train controller suppresses torque variation of the internal combustion engine by controlling the variable valve train so that an efficiency of taking the air into each cylinder of the internal combustion engine increases. 26. The internal combustion engine according to claim 24, wherein the predetermined condition is an operation state under which an amount of air taken in the internal combustion engine is adjusted by controlling the variable valve train, and a condition under which the throttle valve is closed by the predetermined amount. 27. The internal combustion engine according to claim 26, wherein, when the internal combustion engine is operating in the non-throttle control state, under the operation state where the amount of air taken in the internal combustion engine is adjusted by controlling the variable valve train, control is performed so that an opening amount of the throttle valve is maintained at an opening amount at which the throttle valve is substantially fully open. 28. The internal combustion engine according to claim 24, wherein a manner in which the control for closing the throttle valve is gradually changed, and a manner in which the variable valve train performs the control is gradually changed. 29. The internal combustion engine according to claim 24, further comprising: a detection device that detects the intake air amount when the control for closing the throttle valve is performed, wherein the opening and closing timings of the intake valve and the exhaust valve are determined based on a target amount by which the throttle valve is closed and the detected intake air amount so that the torque variation of the internal combustion engine is not caused. 30. The internal combustion engine according to claim 24, wherein at least one of a target opening timing, a target closing timing and a target opening amount of the at least one of the intake valve and the exhaust valve is determined in accordance with an opening amount of the throttle valve, when the variable valve train is controlled by the valve train controller. 31. The internal combustion engine according to claim 24, wherein the valve train controller controls the variable valve train in order to suppress torque variation of the internal combustion engine when the throttle valve controller closes the throttle valve by the predetermined amount by adjusting the at least one of the opening timing, the closing timing and the opening amount of the at least one of the intake valve and the exhaust valve based on the predetermined amount by which the throttle valve was closed.
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