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System and Method for a Dual Fuel, Direct Injection Combustion Engine

Abstract: 

A standard diesel injection system and a mechanical direct-gas injection system are selectively operable, in combination with a continuous pilot injection system, to provide a combustion system that is capable of operating in either a conventional diesel mode or a dual-fuel mode. Operation between convention diesel or dual-fuel combustion modes is mechanically controlled by a two-position, four-way control valve. The mechanical direct-gas injection system is actuated by pulsed diesel fuel directed to the actuation chamber of a gas injector by the same injection pump used to provide diesel fuel to the combustion chamber during conventional diesel operation.

Patent Number: 
5,890,459
Date Of Issue: 
04/06/1999
Inventors: 

John C. Hedrick;Gary Bourn