193results about "High pressure gas fuel injection" patented technology

A fuel delivery injector for an internal combustion engine. The fuel injector forms pan of a device (10) which provides a combined injection and ignition means for the engine. The fuel delivery injector comprises a first portion (31) and a second portion (32) adapted to be detachably connected together. The first portion has a delivery port (37) defined between a valve seat (61) and a valve member (63) movable with respect to the valve seat (61) for opening and closing the delivery port (37). An actuating member (87) is provided in the first portion (31) and is operatively connected to the valve member (63). An actuating means (85) is provided in the second portion (32). When the first and second portions (31, 32) are connected together, the actuating mean (85) is operably associated with the actuating member (87) to provide an actuating assembly (83). Typically, the actuating assembly (83) comprises an electromagnetic means in which the actuating member (87) comprises a solenoid armature and the actuating means (85) comprises a solenoid oil, whereby connection of the first and second portions (31, 32) together completes assembly of the electromagnetic means. Where the device (10) provides a combined fuel injector and ignition me the device (10) is provided with a primary electrode (58) which cooperates with a secondary electrode (57) to define a spark gap (60). A popper projection (62) provided on the valve member (63) is utilized to define the primary electrode (58), as well as to provide spray guidance effects on the fuel spray issuing from the delivery port (37). The device (10) providing the combined fuel injection and ignition means is also described and claimed.

The invention presents new and useful improvements in the mechanical design of control elements of a reciprocating piston engine. The camshaft is replaced by electric magnetic solenoids that operate a single poppet valve for each cylinder. The invention also includes an air injector combined with a fuel injector, mounted through the engine block and into the cylinder. The injectors are located in the lower ⅓ of the piston stroke area of said cylinder. The ability of the air injector to force air into the cylinder while the poppet valve is open will clean the cylinder of all exhaust gases. With the poppet valve closed the air and fuel injectors can inject any amount of air fuel mixture that is desired into the cylinder, resulting in the possibility of a power boost equal to that of a supercharged engine.

A low emission vehicle operates an internal combustion engine with lean air fuel ratios over at least a portion of its operating load range. The vehicle satisfies EURO IV emission requirements with just a three way catalyst and without any NOX storage capability in the exhaust after treatment system. An electronic control unit is programmed to operate the engine such that 80% or less of any tail pipe NOX mass emitted by the vehicle is generated during lean operation of the engine whereby the vehicle satisfies the EURO IV emission requirements.

Disclosed is an Internal combustion engine comprising at least one cylinder with a reciprocating piston to provide said engine with at least one combustion chamber, said combustion chamber further comprising a delivery injector for injecting fuel directly into said combustion chamber, said engine further comprising at least one valved inlet air duct for delivering combustion air into said combustion chamber, wherein at least said inlet air duct and / or its valve is arranged to provide a low tumble inlet port to said at least one combustion chamber, said combustion chamber, in use, having low in-cylinder tumble gas motion of said combustion air and wherein said low in-cylinder tumble gas motion of said combustion air reduces over-enleanment of fuel in end gas regions of said combustion chamber.