Dual Fuel Engine Diagnostic System And Method Of Operating Same

摘要

A compression ignition engine is fueled from common rail fuel injectors that predominately inject natural gas fuel that is compression ignited with a small pilot injection of liquid diesel fuel. Prior to servicing the engine, a service tool may establish a communication link with an electronic controller that controls operation of the engine. Pressure information for a gaseous fuel common rail and a liquid fuel common rail are displayed with the service tool, when the engine is stopped, in order to determine whether the rails are completely depressurized indicating that it is then o.k. to perform servicing tasks.

主权项

1. An engine diagnostic system comprising:
an engine with a plurality of pistons that reciprocate in cylinders to define a compression ratio greater than 14:1, and including an electronic controller in control communication with a dual fuel common rail system; the dual fuel common rail system including a gaseous fuel common rail and a liquid fuel common rail fluidly connected to a plurality of fuel injectors positioned for direct injection of gaseous fuel and liquid fuel directly into the cylinders; and a service tool in communication with the electronic controller and programmed to execute a serviceability algorithm configured to display pressure information for the gaseous fuel common rail and the liquid fuel common rail when the engine is stopped.