초록 ▼

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 c

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.

대표청구항 ▼

[ What we claim is:] [1.] A dual fuel, direct injection combustion system for a diesel engine having at least one combustion chamber disposed in said engine, said combustion system comprising:a first fuel injector in fluid communication with a source of diesel fuel and having a tip portion disposed

[ What we claim is:] [1.] A dual fuel, direct injection combustion system for a diesel engine having at least one combustion chamber disposed in said engine, said combustion system comprising:a first fuel injector in fluid communication with a source of diesel fuel and having a tip portion disposed in said combustion chamber; said first fuel injector being adapted to selectively provide a flow of diesel fuel to said combustion chamber at a rate having a predetermined maximum value;a second fuel injector in fluid communication with a source of diesel fuel and having a tip portion disposed in said combustion chamber, said second fuel injector being adapted to continuously provide a pulsed flow of diesel fuel to said combustion chamber during operation of said engine, at a rate of no more than about 5% of the predetermined maximum value of the flow rate of said first fuel injector;a third fuel injector in fluid communication with a source of a pressurized combustible gaseous mixture and having a tip portion disposed in said combustion chamber, said third fuel injector being adapted to selectively provide a flow of said combustible gaseous mixture to said combustion chamber;a first injection pump in fluid communication with said source of diesel fuel;a valve in fluid communication with said first injection pump and said first fuel injector and said third fuel injector, said valve being adapted to selectively direct a flow of diesel fuel from said first injection pump to a selected one of said first fuel injector for injection into said combustion chamber and said third fuel injector for actuation of said third fuel injector to direct a flow of combustible gaseous mixture into said combustion chamber; anda second injection pump in fluid communication with said source of diesel fuel and with said second fuel injector.