Title:
FUEL SUPPLY DEVICE FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JP3189143
Kind Code:
B2
Abstract:
PURPOSE: To save a piping space and inject a specified rate of fuel by detecting pressure inside a fuel tank as a reference pressure of a pressure regulator and pressure at an injection port of a fuel injection valve, and correcting an opening time of the fuel injection valve according to the difference of the pressures.
CONSTITUTION: Boost pressure of an intake manifold 2 relevant to pressure at an injection port of a fuel injection valve 3 is detected by a boost sensor 12. Pressure inside a fuel tank 4, that is a reference pressure of a pressure regulator 6 is detected by means of a tank inner pressure sensor 13. Difference between a tank inner pressure and a boost pressure indicates adjustment error of fuel pressure. Flow rate error is generated in proportional to the root of the difference. The root of the difference between the tank inner pressure and the boost pressure is set as a correction factor of a fuel injection pulse width by means of the fuel pressure. Decreasing correction is performed by an increasing flow rate which is caused by the fuel pressure higher than a specified level in respect to a pressure at an injection port with the injection pulse width set by the correction factor. The required rate of fuel is injected and supplied under adjusted pressure of the pressure regulator 6.
Inventors:
Naoki Tomizawa
Application Number:
JP22373694A
Publication Date:
July 16, 2001
Filing Date:
September 19, 1994
Export Citation:
Assignee:
Unisia Jecs Co., Ltd.
International Classes:
F02M69/00; F02D41/02; F02D41/04; F02D41/32; F02D41/34; F02D45/00; F02M69/54; (IPC1-7): F02D41/04; F02D41/02; F02D41/34; F02D45/00; F02M69/00
Domestic Patent References:
| JP7208236A | ||||
| JP842374A | ||||
| JP6229280A |
Attorney, Agent or Firm:
Fujio Sasashima