Sequential control valve
AssigneeHaldex Hydraulics Corporation
InventorGustav Berggren
Life of this patent
Estimating the term…
Abstract
A system for controlling the mixture of an air flow and an exhaust gas flow utilizing two valves, the first valve at least partially positioned in an air intake conduit and regulating the flow of fluid through the air conduit, and the second valve positioned in an exhaust gas recirculation conduit for regulating the flow of exhaust gas. The control scheme presenting a sequential or stepwise control sequence, where the first valve is actuated over a first pressure range and the second valve is actuated over a second pressure range such that valves operate in a sequential manner.
Claims29
A system for controlling the mixture of air and recirculating exhaust gas, comprising:
- an air conduit defined by a wall for communicating air therethrough;
- an exhaust gas inlet passing through the wall of said air conduit for introducing exhaust gas into said air conduit;
- and
- an air flow regulator, at least partially positioned in said air conduit, said air flow regulator regulating the amount of air passing through said air conduit;
- a restriction valve, positioned ahead of said exhaust gas inlet in an exhaust gas recirculation conduit, said restriction valve regulating the amount of exhaust gas introduced into said air conduit;
- said air flow regulator and said restriction valve providing a sequential control scheme where during a first pressure range said flow regulator is actuated and during a second pressure range said restriction valve is actuated.
A system for controlling the mixture of air and recirculating exhaust gas, comprising:
- an air conduit defined by a wall for communicating air therethrough;
- an exhaust gas inlet passing through the wall of said air conduit for introducing exhaust gas into said air conduit, said exhaust gas inlet coupled to an exhaust gas recirculation conduit;
- an air flow regulator, at least partially positioned in said air conduit, said air inlet flow regulator regulating the amount of air passing through said air conduit;
- a restriction valve, positioned in the exhaust gas recirculation conduit, said restriction valve regulating the amount of exhaust gas introduced into said air conduit;
- a first pressure range during which said air flow regulator is actuated;
- and
- a second pressure range during which said restriction valve is actuated;
- said air flow regulator and said restriction valve operating in a sequential manner such that when said air flow regulator is fully actuated, then said restriction valve will actuate.
A method for controlling the mixture of air and recirculating exhaust gas in a combustion engine, comprising the step of:
- drawing air in through an air conduit;
- coupling an exhaust gas conduit to the air conduit;
- passing exhaust gas into the exhaust gas conduit to recirculate into the air conduit;
- controlling an air flow regulator, which regulates the amount of air passing through the air conduit, over a first pressure range;
- and
- controlling a restriction valve, which regulates the amount of exhaust gas passing through the exhaust gas conduit, over a second pressure range;
- wherein the air flow regulator and the restriction valve operate in a sequential manner such that when the air flow regulator is fully actuated, then the restriction valve will actuate.
Dependencies are inferred from the claim text.