Fuel pressure control system for an internal combustion engine

摘要

A pneumatic fuel pressure regulator and a mechanical fuel pressure regulator are disclosed wherein the pneumatic fuel pressure regulator uses a mechanical adjustment screw to position a spring locator and spring force exerted on a diaphragm assembly controlling flow through a base fuel block. The mechanical fuel pressure regulator includes a stepper motor and a threaded drive shaft to control pressure exerted on a diaphragm assembly to regulate passage through a base fuel block. A dual stage system combines the pneumatic and mechanical regulators in a dual base unit having two ports separately controlled by the separate regulators.

主权项

1. A fuel pressure control system for an internal combustion engine, comprising:
a fuel regulator block for a fuel injector, the fuel regulator block having an internal valve port and a diaphragm abutting directly against a valve seat on the internal valve port for regulating fuel pressure within the fuel regulator block; means for mechanically adjusting a position of the diaphragm relative to the valve seat; and a microcontroller operatively connected to the diaphragm position adjusting means and programmed to selectively open or close the internal valve port.