ACTIVE ENGINE FUEL PRESSURE PULSATION CANCELLATION TECHNIQUES

摘要

An active fuel pressure pulsation cancellation technique includes receiving, at a controller of an engine having a camshaft-driven fuel pump, an unfiltered fuel pressure signal indicative of a measured pressure of fuel in a fuel rail. The technique includes detecting, at the controller, fuel pressure pulsations in the fuel rail based on the unfiltered fuel pressure signal. The technique includes generating, at the controller, a cancellation signal based on an opposite polarity of the fuel pressure pulsations. The technique also includes controlling, by the controller, an actuator associated with the fuel rail using the cancellation signal to cause the actuator to generate liquid-borne cancellation pulsations that cancel the fuel pressure pulsations in the fuel rail.

主权项

1. An engine system, comprising;
an engine configured to rotatably turn a crankshaft to generate drive torque, the crankshaft also being operable to drive a camshaft of the engine; a fuel system comprising:
a fuel rail configured to house a fuel,a fuel pump driven by the camshaft and configured to pump the fuel into the fuel rail, andfuel injectors configured to inject the fuel from the fuel rail into the engine; a fuel pressure sensor configured to generate an unfiltered fuel pressure signal indicative of a measured pressure of the fuel in the fuel rail; an actuator configured to generate liquid-borne cancellation pulsations in the fuel rail in response to a cancellation signal; and a controller configured to:
receive the unfiltered fuel pressure signal,detect fuel pressure pulsations in the fuel rail based on the unfiltered fuel pressure signal,generate the cancellation signal based on an opposite polarity of the fuel pressure pulsations, andcontrol the actuator utilizing the cancellation signal to generate the liquid-borne cancellation pulsations to cancel the fuel pressure pulsations in the fuel rail.