Control device for internal combustion engine

• US 7,246,600 B2
• Filed: 09/28/2005
• Issued: 07/24/2007
• Est. Priority Date: 12/27/2004
• Status: Expired due to Fees

• Current Assignee: Nippon Soken, Inc., Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Nippon Soken, Inc., Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Ohtani, Motoki, Nakashima, Tatsushi
• Primary Examiner(s): KWON, JOHN
• Application Number:
  US11/236,766
• Publication Number:
  US 20060137648A1
• Time in Patent Office: 664 Days
• Field of Search: 123/434, 123/435, 123/673, 123/679, 123/695, 123/478, 123/480, 123/491, 361/152, 361/154, 361/155
• US Class Current: 123/435
• CPC Class Codes: F02D 35/021 using an ionic current sensor
• CPC Class Codes: F02D 35/027 using knock sensors
• CPC Class Codes: F02D 35/028 by determining the combustion timing or phasing
• CPC Class Codes: F02D 41/3023 a mode being the stratified charge spark-ignited mode
• CPC Class Codes: F02D 41/401 Controlling injection timing F02D41/402 takes precedence
• CPC Class Codes: Y02T 10/40 Engine management systems

Abstract

An ECU executes a program including the steps of: calculating a base timing of injection (INJB); determining whether an engine knocks; if the engine knocks, increasing a correction value INJK(I) applied to correct a timing of injection; and calculating the base timing of injection INJB plus the correction value INJK(I) to obtain a timing of injection INJ.

Claims

1. A control device for an internal combustion engine including injection means injecting fuel directly into a cylinder, comprising:

detection means for detecting that an engine knocks; and

control means for controlling said injection means to provide a faster timing of propagation of flame in said cylinder toward an intake side when that the engine knocks is detected;

wherein said control means includes means for controlling said injection means to increase an air fuel ratio in said cylinder at said intake side to provide a faster timing of propagation of flame in said cylinder toward said intake side.

2. The control device according to claim 1, wherein said control means includes means for introducing a fuel injection advance at an intake stroke.

3. The control device according to claim 2, further comprising means for limiting a timing of injection of fuel to be no earlier than a first predetermined timing of injection and no later than a second predetermined timing of injection.

4. The control device according to claim 3, further comprising means for introducing a spark retard when that said engine knocks is detected and said timing of injection is said first timing.

5. The control device according to claim 1, wherein:

said cylinder receives fuel divided and thus injected twice at intake and compression strokes; and

said control means includes means for introducing a fuel injection retard at said compression stroke.

6. The control device according to claim 5, further comprising means for limiting a timing of injection of fuel to be no earlier than a first predetermined timing of injection and no later than a second predetermined timing of injection.

7. The control device according to claim 6, further comprising means for introducing a spark retard when that said engine knocks is detected and said timing of injection is said second timing.

8. The control device according to claim 5, wherein said control means includes said means for introducing said fuel injection retard at said compression stroke and in addition thereto means for increasing an amount of fuel injected at said compression stroke.

9. The control device according to claim 8, further comprising means for limiting said amount to be at least a first predetermined amount and at most a second predetermined amount.

10. The control device according to claim 9, further comprising means for introducing a spark retard when that said engine knocks is detected and said amount is said second amount.

11. A control device for an internal combustion engine including an injector injecting fuel directly into a cylinder, comprising:

a detector detecting that an engine knocks; and

a controller controlling said injector to provide a faster timing of propagation of flame in said cylinder toward an intake side when that the engine knocks is detected;

wherein said controller controls said injector to increase an air fuel ratio in said cylinder at said intake side to provide a faster timing of propagation of flame in said cylinder toward said intake side.

12. The control device according to claim 11, wherein said controller introduces a fuel injection advance at an intake stroke.

13. The control device according to claim 12, further comprising an injection timing limiter limiting a timing of injection of fuel to be no earlier than a first predetermined timing of injection and no later than a second predetermined timing of injection.

14. The control device according to claim 13, further comprising a spark retarder introducing a spark retard when that said engine knocks is detected and said timing of injection is said first timing.

15. The control device according to claim 11, wherein:

said cylinder receives fuel divided and thus injected twice at intake and compression strokes; and

said controller introduces a fuel injection retard at said compression stroke.

16. The control device according to claim 15, further comprising an injection timing limiter limiting a timing of injection of fuel to be no earlier than a first predetermined timing of injection and no later than a second predetermined timing of injection.

17. The control device according to claim 16, further comprising a spark retarder introducing a spark retard when that said engine knocks is detected and said timing of injection is said second timing.

18. The control device according to claim 15, wherein said controller introduces said fuel injection retard at said compression stroke and in addition thereto increases an amount of fuel injected at said compression stroke.

19. The control device according to claim 18, further comprising a limiter limiting said amount to be at least a first predetermined amount and at most a second predetermined amount.

20. The control device according to claim 19, further comprising a spark retarder introducing a spark retard when that said engine knocks is detected and said amount is said second amount.