System and method of gas recirculation in an internal combustion engine
AssigneeDiesel Engine Retarders, Inc.
InventorsZhou Yang, Robb Janak, Neil Fuchs
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Abstract
A gas recirculation system is disclosed for improving engine braking in an internal combustion engine having an intake valve, an exhaust valve, and a cylinder. The system includes an exhaust manifold operatively connected to the cylinder through the exhaust valve; an intake manifold operatively connected to the cylinder through the intake valve; and a gas recirculation passage adapted to recirculate gas from the exhaust manifold to the intake manifold during an engine braking event.
Claims17
A gas recirculation system for improving engine braking in an internal combustion engine having an intake valve, an exhaust valve, and a cylinder, said gas recirculation system comprising:
- an exhaust manifold operatively connected to the cylinder through the exhaust valve;
- an intake manifold operatively connected to the cylinder through the intake valve;
- and
- a gas recirculation passage adapted to recirculate gas from said exhaust manifold to said intake manifold during an engine braking event.
A method of improving engine braking using gas recirculation in an internal combustion engine having an intake valve, an exhaust valve, an intake manifold, an exhaust manifold, and a cylinder, said method comprising the steps of:
- providing a gas recirculation passage connecting the exhaust manifold to the intake manifold;
- and
- recirculating gas from the exhaust manifold to the intake manifold through the gas recirculation passage during an engine braking event.
A method of improving operation of an internal combustion engine based on at least one engine operating parameter, said method comprising the steps of:
- measuring the engine operating parameter;
- providing gas recirculation during at least two engine processes selected from the group consisting of:
- engine braking operation, cleaning operation, and positive power exhaust gas recirculation operation;
- and
- controlling the flow of the recirculated gas based on the value of the engine operating parameter.
Dependencies are inferred from the claim text.