초록 ▼

A fuel pump control system controls the operating speed of the fuel pump to control the fuel pressure in a fuel supply circuit for a internal combustion engine. The control system includes a main control circuit constantly connecting a fuel pump driver to a vehicle battery which acts as a power sour

A fuel pump control system controls the operating speed of the fuel pump to control the fuel pressure in a fuel supply circuit for a internal combustion engine. The control system includes a main control circuit constantly connecting a fuel pump driver to a vehicle battery which acts as a power source and a normally-open auxiliary circuit. The main control circuit adjusts the power supply to the fuel pump driver to adjust the operating speed of the fuel pump to either a first maximum or a second minimum speed. The auxiliary circuit establishes electrical communication between the fuel pump driver and the battery when a demand for increasing of the fuel pressure in the supply line and thus for enrichment of the air/fuel mixture beyond a predetermined value is detected on the basis of one or more preselected engine operating parameters.

대표청구항 ▼

A control system for a fuel pump in a fuel supply system for an internal combustion engine comprising: a fuel pump driver associated with said fuel pump to drive the latter at a controlled speed; a sensor for monitoring a preselected engine operating parameter and producing a sensor signal indicativ

A control system for a fuel pump in a fuel supply system for an internal combustion engine comprising: a fuel pump driver associated with said fuel pump to drive the latter at a controlled speed; a sensor for monitoring a preselected engine operating parameter and producing a sensor signal indicative of the engine operating parameter; a controller responsive to said sensor signal for deriving a desired fuel pump speed value on the basis of the value of said sensor signal and operating said fuel pump driver to drive said fuel pump in accordance with said desired speed in one of a predetermined speed range defined by a first maximum speed and a second minimum speed, and a predetermined ultimate speed in excess of said first speed and said controller being responsive to the sensor signal representative of a desired fuel pump speed in excess of said first maximum speed to operate said fuel pump driver to drive said fuel pump at said ultimate speed.