Patent ID: 9523334
Filing Date: 2016-12-20
CPC Classification: F02D,F02M

Claim Text:
1. A system for controlling fuel supply of a diesel engine, comprising: a fuel pump controller configured to set a fuel supply target pressure supplied from a low-pressure fuel pump to a high-pressure pump in proportion to a quantity of fuel consumed by an injector; and a fuel pressure measurement sensor configured to measure a current fuel supply pressure supplied from the low-pressure fuel pump to the high-pressure pump, wherein revolutions per minute (RPM) of a motor for feeding fuel of the low-pressure fuel pump is variably adjusted in accordance with the fuel supply target pressure, wherein the fuel pump controller compensates for fuel temperature by maximally supplying fuel to the high-pressure pump by driving 100% the low-pressure fuel pump when the high-pressure pump is in a high temperature state in which the high-pressure pump demands lubricating and cooling faster than a predetermined rate, compensates for low fuel by maximally supplying fuel to the high-pressure pump by driving 100% the low pressure fuel pump when a fuel warning light is turned on and the fuel is less than a predetermined amount, and compensates for rapid acceleration of a vehicle by maximally supplying fuel to the high-pressure pump by driving 100% the low-pressure fuel pump when fuel consumption is increased faster than a predetermined rate during the rapid acceleration and the fuel supplied to the high-pressure pump is less than a predetermined amount for a predetermined time, wherein the rapid acceleration is an acceleration higher than a predetermined rate.