Control system and method of internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsToru Kidokoro, Keizo Hiraku, Hiroshi Kanai, Toshiki Annoura, Hideki Suzuki
Life of this patent
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Abstract
In a control system of an internal combustion engine including an intake flow control valve disposed downstream of a throttle valve, a controller controls opening and closing of the intake flow control valve, depending upon an operating state of the internal combustion engine. Upon detection of a failure in the intake flow control valve, the controller controls an intake air amount or flow rate to a different value.
Claims22
A control system of an internal combustion engine including an intake flow control valve disposed downstream of a throttle valve, the control system comprising a controller that:
- controls opening and closing of the intake flow control valve, depending upon an operating state of the internal combustion engine;
- detects a failure of the intake flow control valve to operate properly;
- and
- controls an intake air amount to a first value when the failure is not detected, and controls the intake air amount to a second value when the failure is detected, the second value being different from the first value.
A control system of an internal combustion engine including an intake flow control valve disposed downstream of a throttle valve, the control system comprising a controller that:
- controls opening and closing of the intake flow control valve, depending upon an operating state of the internal combustion engine;
- detects a failure of the intake flow control valve that is placed in an open position when control for closing the intake flow control valve is performed;
- and
- controls an intake air amount to an increased value when the failure is detected, so as to stabilize combustion of an air-fuel mixture in the engine.
A control system of an internal combustion engine including an intake flow control valve disposed downstream of a throttle valve, the control system comprising a controller that:
- controls opening and closing of the intake flow control valve, depending upon an operating state of the internal combustion engine;
- detects whether the intake flow control valve is sticking at a certain opening angle;
- and
- when detecting the sticking of the intake flow control valve, controls opening and closing of the throttle valve in accordance with a degree of sticking of the intake flow control valve.
A control method of an internal combustion engine including an intake flow control valve disposed downstream of a throttle valve, the control method comprising the steps of:
- controlling opening and closing of the intake flow control valve, depending upon an operating state of the internal combustion engine;
- detecting a failure of the intake flow control valve to operate properly;
- and
- controlling an intake air amount to a first value when the failure is not detected, and controlling the intake air amount to a second value when the failure is detected, the second value being different from the first value.
A control method of an internal combustion engine including an intake flow control valve disposed downstream of a throttle valve, the control method comprising the steps of:
- controlling opening and closing of the intake flow control valve, depending upon an operating state of the internal combustion engine;
- detecting a failure of the intake flow control valve that is placed in an open position when control for closing the intake flow control valve is performed;
- and
- controlling an intake air amount to an increased value when the failure is detected, so as to stabilize combustion of an air-fuel mixture in the engine.
A control method of an internal combustion engine including an intake flow control valve disposed downstream of a throttle valve, the control method comprising the steps of:
- controlling opening and closing of the intake flow control valve, depending upon an operating state of the internal combustion engine;
- detecting whether the intake flow control valve is sticking at a certain opening angle;
- and
- when the sticking of the intake flow control valve is detected, controlling opening and closing of the throttle valve in accordance with a degree of sticking of the intake flow control valve.
Dependencies are inferred from the claim text.