Patent ID: 9624852
Date: 2017-04-18
CPC Classifications: F02D,G05D,Y02T

Claim:
1. A fuel system for an injection valve that introduces a liquid fuel and a gaseous fuel separately and independently of each other into a combustion chamber of an internal combustion engine, the fuel system comprising: a liquid fuel supply; a gaseous fuel supply; a liquid fuel pumping apparatus in fluid communication with the liquid fuel supply and supplying the liquid fuel to the injection valve at a pressure suitable for injecting the liquid fuel into the combustion chamber; a pressure regulator in fluid communication with the gaseous fuel supply and supplying the gaseous fuel to the injection valve at a pressure suitable for injecting the gaseous fuel into the combustion chamber, the pressure regulator being unresponsive to liquid fuel pressure downstream from the liquid fuel pumping apparatus; a first pressure sensor for measuring liquid fuel pressure downstream from the liquid fuel pumping apparatus; a second pressure sensor for measuring gaseous fuel pressure downstream from the pressure regulator; and a controller operatively connected with the liquid fuel pumping apparatus, the pressure regulator, the first pressure sensor and the second pressure sensor, and programmed to: