Variable Venturi System and Method for Engine
AssigneeFord Global Technologies, LLC
InventorsJoseph Norman Ulrey, Ross Dykstra Pursifull
Life of this patent
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Abstract
Systems and methods for an engine are described. In one example, a system may include a variable venturi coupled in an intake of the engine; an exhaust gas recirculation system having an exhaust gas recirculation flow path, the exhaust gas recirculation flow path coupled to the variable venturi; and a vacuum-utilizing device or system coupled to the variable venturi. In another example, a method may include coordinating adjustment of an exhaust gas recirculation valve coupled to the exhaust gas recirculation system, a fuel vapor purging valve coupled to the fuel vapor purging system, and the variable venturi in response to operating conditions.
Claims19
A method of controlling engine operation of an engine having an exhaust gas recirculation system and a fuel vapor purging system, the method comprising:
- delivering exhaust gas recirculation flow from the exhaust gas recirculation system to a variable venturi coupled in an intake of the engine;
- delivering fuel vapor flow from the fuel vapor purging system to the variable venturi coupled in an intake of the engine;
- and
- coordinating adjustment of an exhaust gas recirculation valve coupled to the exhaust gas recirculation system, a fuel vapor purging valve coupled to the fuel vapor purging system, and the variable venturi in response to operating conditions.
A system for an engine, comprising:
- a variable venturi coupled in an intake of the engine;
- an exhaust gas recirculation system having an exhaust gas recirculation flow path, the exhaust gas recirculation flow path coupled to the variable venturi;
- and
- a vacuum-utilizing device or system coupled to the variable venturi.
A method of controlling engine operation of an engine having an exhaust gas recirculation system, a crankcase ventilation system, a vacuum brake system, and a fuel vapor purging system, the method comprising:
- delivering exhaust gas recirculation flow from the exhaust gas recirculation system to a variable venturi coupled in an intake of the engine;
- delivering fuel vapor flow from the fuel vapor purging system to the variable venturi;
- delivering crankcase gases from the crankcase ventilation system to the variable venturi;
- boosting outlet gases of the variable venturi;
- and
- adjusting the variable venturi in response to brake booster vacuum, operation of the fuel vapor purging system, and operation of the exhaust gas recirculation system.
Dependencies are inferred from the claim text.