Internal combustion engine controller

• US 7,406,948 B2
• Filed: 07/14/2006
• Issued: 08/05/2008
• Est. Priority Date: 07/19/2005
• Status: Expired due to Fees

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation), Yamaha Hatsudoki Kabushiki Kaisha (Yamaha Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation), Yamaha Hatsudoki Kabushiki Kaisha (Yamaha Corporation)
• Inventors: Teraoka, Masahiko, Idogawa, Masanao, Hirowatari, Seiji, Sugiyama, Fumitoshi, Takida, Dai
• Primary Examiner(s): Vo; Hieu T
• Application Number:
  US11/486,081
• Publication Number:
  US 20070028690A1
• Time in Patent Office: 753 Days
• Field of Search: 123/480, 123/352, 123/350, 477/98, 477/110, 477/176, 735/143.4
• US Class Current: 123/480
• CPC Class Codes: F02D 11/105 characterised by the function converting demand to actuation, e.g. a map indicating relations between an accelerator pedal position and throttle valve opening or target engine torque
• CPC Class Codes: F02D 2200/0404 Throttle position
• CPC Class Codes: F02D 2200/1012 Engine speed gradient
• CPC Class Codes: F02D 2250/21 during a transition between engine operation modes or states
• CPC Class Codes: F02D 37/02 one of the functions being ignition
• CPC Class Codes: F02D 41/023 in relation with the gear ratio shifting conjoint control for improving gear change B60W30/19
• CPC Class Codes: F02D 41/045 Detection of accelerating or decelerating state detection thereof in general G01P
• CPC Class Codes: F02D 41/123 the fuel injection being cut-off

Abstract

An engine ECU executes a program including: the step of outputting a fuel-cut instruction when conditions that an accelerator position PA is not higher than a threshold value and a rate of increase DNE of engine speed NE is not lower than a determination value DNE(0) are satisfied; the step of fully closing throttle opening; and the step of suspending ignition of air-fuel mixture by a spark plug.

Claims

1. A controller for an internal combustion engine coupled to a transmission through a friction engagement element transmitting a driving force, comprising

a control unit controlling said internal combustion engine such that number of rotations of an output shaft of said internal combustion engine is reduced when an accelerator position is smaller than a predetermined open position and rate of increase in the number of rotations of the output shaft of said internal combustion engine is larger than a predetermined determination value.

2. The internal combustion engine controller according to claim 1, wherein

said control unit controls said internal combustion engine such that the number of rotations of the output shaft of said internal combustion engine is reduced while said friction engagement element is engaged and the driving force is being transmitted from said internal combustion engine to said transmission.

3. The internal combustion engine controller according to claim 1, wherein

said determination value is determined based on a gear ratio of said transmission and the number of rotations of the output shaft of said internal combustion engine.

4. The internal combustion engine controller according to claim 1, further comprising

a correcting unit correcting said determination value based on a degree of change of load factor of said internal combustion engine.

5. The internal combustion engine controller according to claim 4, wherein

said correcting unit corrects said determination value to a larger value.

6. The internal combustion engine controller according to claim 4, wherein

said correcting unit corrects said determination value such that amount of correction of said determination value decreases gradually.

7. The internal combustion engine controller according to claim 1, wherein

said control unit controls said internal combustion engine such that the number of rotations of the output shaft of said internal combustion engine is reduced, by performing at least one of suspension of ignition in said internal combustion engine, suspension of fuel injection in said internal combustion engine and reduction of throttle opening in said internal combustion engine.

8. The internal combustion engine controller according to claim 1, wherein

said control unit controls said internal combustion engine such that the number of rotations of the output shaft of said internal combustion engine is reduced, by suspending ignition in said internal combustion engine and thereafter suspending fuel injection in said internal combustion engine.

9. The internal combustion engine controller according to claim 1, wherein

said control unit controls said internal combustion engine such that the number of rotations of the output shaft of said internal combustion engine is reduced, by retarding ignition timing in said internal combustion engine and thereafter suspending fuel injection in said internal combustion engine.

10. The internal combustion engine controller according to claim 1, wherein

said control unit controls said internal combustion engine such that the number of rotations of the output shaft of said internal combustion engine is reduced, by reducing opening of said throttle in said internal combustion engine and thereafter suspending at least one of ignition and fuel injection in said internal combustion engine.

11. The internal combustion engine controller according to claim 1, further comprising:

a throttle valve control unit controlling a throttle valve such that the throttle valve is opened in a state of operation, in which the accelerator position is smaller than said predetermined open position, different from an idle state of said internal combustion engine; and

an inhibiting unit inhibiting reduction of the number of rotations of the output shaft of said internal combustion engine by said control unit when said throttle valve is opened under the control of said throttle valve control unit.

12. A controller for an internal combustion engine, comprising:

a determining unit determining whether number of rotations of an output shaft of the internal combustion engine is to be reduced or not; and

a control unit controlling said internal combustion engine such that, when it is determined that the number of rotations of the output shaft of said internal combustion engine is to be reduced, the number of rotations of an output shaft of said internal combustion engine is reduced by retarding ignition timing in said internal combustion engine and thereafter suspending fuel injection in said internal combustion engine.

13. The internal combustion engine controller according to claim 12, wherein

said internal combustion engine is coupled to a transmission;

and

said control unit controls said internal combustion engine such that the number of rotations of the output shaft of said internal combustion engine is reduced, by retarding ignition timing in said internal combustion engine and thereafter suspending fuel injection in said internal combustion engine.

14. A controller for an internal combustion engine coupled to a transmission through a friction engagement element transmitting a driving force, comprising

control means for controlling said internal combustion engine such that number of rotations of an output shaft of said internal combustion engine is reduced when an accelerator position is smaller than a predetermined open position and rate of increase in the number of rotations of the output shaft of said internal combustion engine is larger than a predetermined determination value.

15. The internal combustion engine controller according to claim 14, wherein

said control means includes means for controlling said internal combustion engine such that the number of rotations of the output shaft of said internal combustion engine is reduced while said friction engagement element is engaged and the driving force is being transmitted from said internal combustion engine to said transmission.

16. The internal combustion engine controller according to claim 14, wherein

said determination value is determined based on a gear ratio of said transmission and the number of rotations of the output shaft of said internal combustion engine.

17. The internal combustion engine controller according to claim 14, further comprising

correcting means for correcting said determination value based on a degree of change of load factor of said internal combustion engine.

18. The internal combustion engine controller according to claim 17, wherein

said correcting means includes means for correcting said determination value to a larger value.

19. The internal combustion engine controller according to claim 17, wherein

said correcting means includes means for correcting said determination value such that amount of correction of said determination value decreases gradually.

20. The internal combustion engine controller according to claim 14, wherein

said control means includes means for controlling said internal combustion engine such that the number of rotations of the output shaft of said internal combustion engine is reduced, by performing at least one of suspension of ignition in said internal combustion engine, suspension of fuel injection in said internal combustion engine and reduction of throttle opening in said internal combustion engine.

21. The internal combustion engine controller according to claim 14, wherein

said control means includes means for controlling said internal combustion engine such that the number of rotations of the output shaft of said internal combustion engine is reduced, by suspending ignition in said internal combustion engine and thereafter suspending fuel injection in said internal combustion engine.

22. The internal combustion engine controller according to claim 14, wherein

said control means includes means for controlling said internal combustion engine such that the number of rotations of the output shaft of said internal combustion engine is reduced, by retarding ignition timing in said internal combustion engine and thereafter suspending fuel injection in said internal combustion engine.

23. The internal combustion engine controller according to claim 14, wherein

said control means includes means for controlling said internal combustion engine such that the number of rotations of an output shaft of said internal combustion engine is reduced, by reducing opening of said throttle in said internal combustion engine and thereafter suspending at least one of ignition and fuel injection in said internal combustion engine.

24. The internal combustion engine controller according to claim 14, further comprising:

throttle valve control means for controlling a throttle valve such that the throttle valve is opened in a state of operation, in which the accelerator position is smaller than said predetermined open position, different from an idle state of said internal combustion engine; and

inhibiting means for inhibiting reduction of the number of rotations of the output shaft of said internal combustion engine by said control means when said throttle valve is opened under the control of said throttle valve control means.

25. A controller for an internal combustion engine, comprising:

determining means for determining whether number of rotations of an output shaft of the internal combustion engine is to be reduced or not; and

control means for controlling said internal combustion engine such that, when it is determined that the number of rotations of the output shaft of said internal combustion engine is to be reduced, the number of rotations of an output shaft of said internal combustion engine is reduced by retarding ignition timing in said internal combustion engine and thereafter suspending fuel injection in said internal combustion engine.

26. The internal combustion engine controller according to claim 25, wherein

said internal combustion engine is coupled to a transmission;

and

said control means includes means for controlling said internal combustion engine such that the number of rotations of an output shaft of said internal combustion engine is reduced, by retarding ignition timing in said internal combustion engine and thereafter suspending fuel injection in said internal combustion engine.

27. A controller for an internal combustion engine coupled to a transmission through a friction engagement element transmitting a driving force, comprising

an ECU, wherein

said ECU controls said internal combustion engine such that number of rotations of an output shaft of said internal combustion engine is reduced when an accelerator position is smaller than a predetermined open position and rate of increase in the number of rotations of the output shaft of said internal combustion engine is larger than a predetermined determination value.

28. A controller for an internal combustion engine, comprising

an ECU, wherein

said ECU determines whether number of rotations of an output shaft of the internal combustion engine is to be reduced or not, and

controls said internal combustion engine such that, when it is determined that the number of rotations of the output shaft of said internal combustion engine is to be reduced, the number of rotations of an output shaft of said internal combustion engine is reduced by retarding ignition timing in said internal combustion engine and thereafter suspending fuel injection in said internal combustion engine.