Abstract: An vapor purge system for a turbocharged internal combustion engine having an evaporative emissions turbo purge valve incorporating a venturi vacuum generator and a hose-off detection function. The turbo purge valve includes a pressure sensor, and a low restriction check valve which is integrated into the outlet port of the venturi vacuum generator. The pressure sensor is capable of detecting the small pressure drop (i.e., vacuum) generated at the air inlet tube or air box during naturally aspirated conditions. The check valve closes the venturi vacuum generator on the purge side during naturally aspirated conditions, allowing fluid communication to the air intake system through one port only, and the detection of the vacuum during these conditions. If a hose becomes detached, either at the outlet port of the venturi vacuum generator or at the air box, the small vacuum is not detected, and the ECU then diagnoses the hose-off condition.

Abstract: An electronic compressor bypass valve (eCBV) module includes a pedestal housing, and a compressor bypass valve mounted to the pedestal housing. An inlet port, a first outlet port, and a second outlet port are integrally formed as part of the pedestal housing, where pressurized air flows into the inlet port. The eCBV module also includes a venturi device at least partially disposed in the second outlet port. When the compressor bypass valve is in an open position, a portion of the pressurized air flows through the first outlet port, and a portion of the pressurized air flows from the inlet port through the venturi device and through the second outlet port. When the compressor bypass valve is in the closed position the pressurized air is prevented from flowing into the first outlet port, and all of the pressurized air flows through the venturi device and through the second outlet port.

Abstract: A three-port turbo purge module, including a housing having a cavity, and two check valves. During a first mode of operation, the first check valve is open and the second check valve is closed by vacuum pressure generated in an intake manifold, such that purge vapor flows from an inlet port into the cavity, through the first check valve, and into a first port. During a second mode of operation, where the intake manifold is operating under positive pressure, the first check valve is closed such that pressurized air flowing into the first port is accelerated through a venturi device disposed in the cavity, and the second check valve is open such that purge vapor flows from the inlet port into the cavity, through the venturi device and mixes with the high-velocity air, through the second check valve into the second port.

Abstract: An electronic compressor bypass valve (eCBV) module includes a pedestal housing, and a compressor bypass valve mounted to the pedestal housing. An inlet port, a first outlet port, and a second outlet port are integrally formed as part of the pedestal housing, where pressurized air flows into the inlet port. The eCBV module also includes a venturi device at least partially disposed in the second outlet port. When the compressor bypass valve is in an open position, a portion of the pressurized air flows through the first outlet port, and a portion of the pressurized air flows from the inlet port through the venturi device and through the second outlet port. When the compressor bypass valve is in the closed position the pressurized air is prevented from flowing into the first outlet port, and all of the pressurized air flows through the venturi device and through the second outlet port.

Abstract: An vapor purge system for a turbocharged internal combustion engine having an evaporative emissions turbo purge valve incorporating a venturi vacuum generator and a hose-off detection function. The turbo purge valve includes a pressure sensor, and a low restriction check valve which is integrated into the outlet port of the venturi vacuum generator. The pressure sensor is capable of detecting the small pressure drop (i.e., vacuum) generated at the air inlet tube or air box during naturally aspirated conditions. The check valve closes the venturi vacuum generator on the purge side during naturally aspirated conditions, allowing fluid communication to the air intake system through one port only, and the detection of the vacuum during these conditions. If a hose becomes detached, either at the outlet port of the venturi vacuum generator or at the air box, the small vacuum is not detected, and the ECU then diagnoses the hose-off condition.

Abstract: A three-port turbo purge module, including a housing having a cavity, and two check valves. During a first mode of operation, the first check valve is open and the second check valve is closed by vacuum pressure generated in an intake manifold, such that purge vapor flows from an inlet port into the cavity, through the first check valve, and into a first port. During a second mode of operation, where the intake manifold is operating under positive pressure, the first check valve is closed such that pressurized air flowing into the first port is accelerated through a venturi device disposed in the cavity, and the second check valve is open such that purge vapor flows from the inlet port into the cavity, through the venturi device and mixes with the high-velocity air, through the second check valve into the second port.