Variable geometry exhaust cooler
AssigneeGM Global Technology Operations LLC
InventorsJianwen Li, Rahul Mital
Life of this patent
Estimating the term…
Abstract
The present invention provides an exhaust cooler mounted to a tailpipe for receiving exhaust gas. The exhaust cooler includes a jet pump connectable to the tailpipe and a nozzle connectable to the tailpipe. The nozzle defines a nozzle opening between the tailpipe and the jet pump for communicating the exhaust gas from the tailpipe to the jet pump. A first throttle member is included that is moveable between a closed position and an open position, the open position defining a first opening between the tailpipe and the jet pump for communicating the exhaust gas from the tailpipe to the jet pump.
Claims20
An exhaust cooler mounted to a tailpipe for receiving exhaust gas, the exhaust cooler comprising:
- a jet pump disposed adjacent to an output end of the tailpipe, wherein the jet pump includes an intake portion, a pipe portion, and an output portion, and wherein the intake portion has a first end that defines an air intake opening for communicating ambient air into the jet pump, wherein the air intake opening is substantially fixed in size;
- a nozzle assembly including a first and a second throttle plate each moveable between a closed position and an open position, wherein the nozzle assembly is disposed adjacent to the output end of the tailpipe and within the intake portion of the jet pump, the nozzle assembly defining an exhaust opening area between the tailpipe and the jet pump for communicating the exhaust gas from the tailpipe to the intake portion of the jet pump, wherein in the closed position, the throttle plates combine to form a flat annular cover capping the output end of the tailpipe and the exhaust opening area is variable between a minimum area when the throttle plates are in the closed position and a maximum area when the throttle plates are in the open position.
An exhaust cooler mounted to a tailpipe for receiving exhaust gas, the exhaust cooler comprising:
- a jet pump disposed downstream of the tailpipe, wherein the jet pump includes a converging frusto-conical intake portion, a cylindrical pipe portion, and a diverging frusto-conical output portion, and the intake portion defines a circular air intake opening for communicating ambient air into the jet pump, wherein the air intake opening is substantially fixed in size and is concentric with the intake portion;
- a nozzle connected to the tailpipe, the nozzle defining a nozzle opening between the tailpipe and the jet pump for communicating the exhaust gas from the tailpipe to the intake portion of the jet pump;
- and
- a first semi-circular plate moveable between a closed position and an open position, the open position defining a first opening between the tailpipe and the jet pump for communicating the exhaust gas from the tailpipe to the jet pump, wherein the first plate is pivotally connected to the tailpipe wherein in the closed position the first semi-circular plate forms a flat annular cover capping the output end of the tailpipe.
Dependencies are inferred from the claim text.