Ejector System for Vehicle
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsYasuhiro Oi, Shigemasa Hirooka
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Abstract
An ejector system controls the idle speed of an internal combustion engine by controlling an electric throttle valve system that adjusts the flow-rate of the intake air to be supplied to the internal combustion engine, and includes an ejector which generates a negative pressure of which the absolute value is larger than the absolute value of a negative pressure to be introduced from an intake manifold, a vacuum control valve which causes the ejector to operate or causes the ejector to stop operating, and an ECU that controls the vacuum switching valve. With the ejector system, even if the ejector is caused to operate or caused to stop operating, it is possible to appropriately suppress fluctuations in the idle speed, and appropriately obtain a negative pressure.
Claims14
An ejector system for a vehicle, comprising:
- a flow-rate adjustment device that adjusts an intake air flow-rate that is a flow-rate of an intake air to be supplied to an internal combustion engine;
- an ejector that generates a negative pressure of which an absolute value is larger than an absolute value of a negative pressure to be introduced from an intake passage of an intake system of the internal combustion engine;
- a state changing device that causes the ejector to operate or causes the ejector to stop operating;
- and
- a control unit that controls the state changing device, and that controls the flow-rate adjustment device based on an operating state of the ejector.
Dependencies are inferred from the claim text.