Claims
- 1. A fuel supply system for an internal combustion engine, and fuel supply system having a returnless fuel pipe arrangement in which no fuel return line is provided for returning an excessive portion of fuel, delivered under pressure from a fuel pump to a fuel injector, to a fuel tank, said fuel supply system comprising:
- fuel pressure control means for controlling said fuel pump so as to converge a fuel pressure in said fuel pipe arrangement to a target fuel pressure;
- a check valve provided at a fuel discharge port of said fuel pump; and
- function stopping means for stopping a function of said check valve under a predetermined condition.
- 2. The fuel supply system according to claim 1, wherein said fuel pressure control means includes means for reducing a fuel discharge of said fuel pump under said predetermined condition.
- 3. The fuel supply system according to claim 1, wherein said fuel pressure control means stops said fuel pump under said predetermined condition.
- 4. The fuel supply system according to claim 1, wherein said fuel pressure control means rotates said fuel pump in a reverse direction under said predetermined condition.
- 5. The fuel supply system according to claim 1, wherein said check valve includes a solenoid, and said function stopping means stops the function of said check valve by energizing said solenoid.
- 6. The fuel supply system according to claim 1, wherein said function stopping means stops the function of said check valve when the fuel pressure in said fuel pipe arrangement becomes higher than the target fuel pressure by a predetermined value.
- 7. The fuel supply system according to claim 1, wherein said function stopping means stops the function of said check valve when fuel cut is performed to stop fuel injection from said fuel injector.
- 8. The fuel supply system according to claim 7, wherein said fuel pressure control means includes means for controlling, during the fuel cut, the fuel pressure in said fuel pipe arrangement to approximate to a value which represents the target fuel pressure for fuel injection upon returning from the fuel cut.
Priority Claims (1)
Number |
Date |
Country |
Kind |
7-142756 |
Jun 1995 |
JPX |
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Parent Case Info
This is a continuation of application Ser. No. 08/660,938, filed on Jun. 10, 1996, which was abandoned upon filing hereof.
US Referenced Citations (12)
Foreign Referenced Citations (3)
Number |
Date |
Country |
62-32228 |
Feb 1987 |
JPX |
6-50230 |
Feb 1994 |
JPX |
6-272632 |
Sep 1994 |
JPX |
Continuations (1)
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Number |
Date |
Country |
Parent |
660938 |
Jun 1996 |
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