Device for controlling throttle valve
AssigneeHitachi, Ltd.
InventorsMasatoshi Hoshino, Minoru Oosuga
Life of this patent
Estimating the term…
Abstract
A control device for a throttle valve is provided, which, by dispensing a position sensor for the throttle valve, can reduce a cost of the sensor and which is excellent in durability and reliability and is reduced in its control delay. The control device includes an air flow sensor 1 for detecting an air flow rate flowing through an intake pipe of an internal combustion engine, a motor 33 for driving the throttle valve 2 disposed in the intake pipe and an ECU 15 for controlling the driving operation of the motor. The ECU 100 feedback-controls the output of the air flow sensor so that a difference between the output of the air flow sensor 1 and an air flow rate required for the engine reduces.
Claims3
A method for controlling an amount of intake air of an internal combustion engine, comprising the steps of:
- calculating a target amount of intake air according to a depressing amount of an accelerator pedal,
- detecting an actual amount of intake air by an air intake sensor for measuring an amount of intake air flowing through an air intake pipe,
- comparing the actual amount of intake air detected by said air intake sensor with said target amount of intake air, and
- controlling a target current value flowing through a driving motor of a throttle valve without using a signal indicating an opening degree of said throttle valve, so as to reduce the difference between the target amount and the measured amount of intake air.
A method for controlling a motor of a motor driven throttle valve for controlling an amount of intake air of an internal combustion engine, comprising:
- a feedback system for feedback-controlling so as a detected value of an air intake sensor for detecting said amount of an intake air becomes to be a target amount of an intake air relating to a depressing amount of an accelerator pedal without using a signal indicating an opening degree of said throttle valve,
- outputting a target amount of a motor current according to the difference between said detected value of said intake air sensor and said target amount of an intake air, and
- a feedback system for feedback-controlling so as a current flowing through said motor becomes to be a target current value.
Dependencies are inferred from the claim text.