Patent ID: 9714633
Date: 2017-07-25
CPC Classifications: F02M

Claim:
1. A control valve for a fuel injector, the control valve comprising: a control valve body; a supply passage for high pressure fuel; a control chamber and a pressure compensating chamber, the control chamber and the pressure compensating chamber both being in fluid communication with the supply passage such that the supply passage communicates high pressure fuel to the control chamber and to the pressure compensating chamber; a low pressure fuel return line; and a control valve member mounted in the control chamber which selectively prevents fluid communication between the control chamber and the fuel return line and between the pressure compensating chamber and the low pressure fuel return line and which selectively permits fluid communication between the control chamber and the fuel return line and between the pressure compensating chamber and the low pressure fuel return line for controlling fuel pressure in the control chamber; wherein the pressure compensating chamber is spaced radially outwardly from the control chamber.