초록 ▼

In a turbo compounded air and fuel supply system for a gaseous fuel engine, separate turbochargers are utilized to compress the air and gaseous fuel. A first turbocharger has a first turbine connected to an exhaust line from the engine and a first compressor having an inlet open to a source of air.

In a turbo compounded air and fuel supply system for a gaseous fuel engine, separate turbochargers are utilized to compress the air and gaseous fuel. A first turbocharger has a first turbine connected to an exhaust line from the engine and a first compressor having an inlet open to a source of air. A compressed air supply line has one end connected to the outlet from the first compressor and its other end connected to an engine air inlet. A gaseous fuel supply line has one end connected to a source of low pressure gaseous fuel. A second turbocharger has a second turbine connected to the exhaust line from the engine and has a second compressor with an inlet connected to the gaseous fuel supply line. A high pressure gaseous fuel supply line has one end connected to the outlet of the second compressor and its other end connected to an engine fuel inlet. A computer controlled wastegate valve in the exhaust line allows a portion of the exhaust to be bypassed around the second turbine. Thus, the present invention utilizes waste energy from the engine to compress both the air and fuel supply to a gaseous fuel engine rather than by some external compressor or a device which draws power directly from the engine.

대표청구항 ▼

[ We claim:] [1.] A turbo compounded air and fuel supply system for a gaseous fuel engine comprising:a first turbocharger having a first turbine connected to an exhaust line from the engine and a first compressor with an inlet open to a source of air;a compressed air supply line with one end connect

[ We claim:] [1.] A turbo compounded air and fuel supply system for a gaseous fuel engine comprising:a first turbocharger having a first turbine connected to an exhaust line from the engine and a first compressor with an inlet open to a source of air;a compressed air supply line with one end connected to an outlet from said first compressor and its other end connected to an engine air inlet;a gaseous fuel supply line with one end connected to a source of low pressure gaseous fuel;a second turbocharger having a second turbine connected to said exhaust line from said engine and a second compressor having an inlet connected to said gaseous fuel supply line;a high pressure gaseous fuel supply line with one end connected to an outlet from said second compressor and its other end connected to an engine fuel inlet;a turbine bypass line with one end connected to said exhaust line and an other end that opens to atmosphere;a wastegate valve positioned in said turbine bypass line;said first turbine, said second turbine and said turbine bypass line are connected in parallel to said exhaust line;a flow control valve positioned between said exhaust line and said second turbine; andsaid flow control valve is biased open but includes means for closing proportionate to a rise in fuel pressure within said high pressure gaseous fuel supply line.