Variable Venturi System and Method for Engine
First Claim
1. 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.
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Accused Products
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.
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Citations
19 Claims
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1. A method of controlling engine operation of an engine having an exhaust gas recirculation system and a fuel vapor purging system, the method comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for an engine, comprising:
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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. - View Dependent Claims (9, 10, 11, 12, 13)
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14. 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:
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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. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification