Control apparatus of internal combustion engine equipped with electronic throttle control device
AssigneeMitsubishi Jidosha Kogyo Kabushiki
InventorsTakuya Matsumoto, Toru Hashimoto, Mitsuhiro Miyake, Seiichi Inoue
Life of this patent
Estimating the term…
Abstract
In an internal combustion engine equipped with an electronic throttle control device for electrically driving a throttle valve, a control apparatus includes failure detecting means for detecting a failure of the electronic throttle control device, and control means for limiting fuel supply to the engine when the failure detecting means detects a failure of the electronic throttle control device, if the rotating speed of the engine becomes equal to or higher than a predetermined value.
Claims26
A control apparatus of an internal combustion engine equipped with an electronic control device that electrically drives a throttle valve disposed in an intake passage by means of an actuator, comprising;
- failure detecting means for detecting a failure of said electronic control device to properly drive said throttle valve;
- and
- control means for adjusting a function of the engine to provide optimal engine operation based on the type of failure detected by the failure detecting means,
- wherein, when the failure detected by the detecting means is indicative of a stuck open throttle valve, the control means performs at least one of limiting a fuel injection system of the engine to a lean burn mode, stopping the fuel supply to at least one cylinder of the engine, turning an exhaust gas recirculation valve off, and stopping selected engine drive accessories;
- wherein, when the failure detected by the detecting means is indicative of an open throttle valve and an engine speed in excess a predetermined maximum engine speed, the control means stops all fuel supply to the engine;
- and
- wherein, when the failure detected by the detecting means is indicative of a stuck closed throttle valve, the control means inhibits the fuel injection system of the engine to the lean burn mode.
A control apparatus of an internal combustion engine equipped with an electronic control device that electrically drives a throttle valve disposed in an intake passage by means of an actuator, comprising:
- combustion mode control device which selects a combustion mode from a normal combustion mode in which an air fuel mixture formed in a combustion chamber has a first air-fuel ratio, and a lean-burn mode in which the air fuel mixture formed in the combustion chamber has a second air-fuel ratio that is larger than said first air-fuel ratio, depending upon an operating state of the engine;
- and
- failure detecting means for detecting a failure of said electronic control device;
- wherein said combustion mode control device selects the lean-burn mode regardless of the operating state of the engine, when said failure detecting means determines that said throttle valve is stuck at a position in which an opening of the throttle valve is equal to or larger than a first predetermined value.
A control apparatus of an internal combustion engine equipped with an electronic control device that electrically drive a throttle valve disposed in an intake passage by means of an actuator, comprising:
- a combustion mode control device that selects a combustion mode from a normal combustion mode in which an air-fuel mixture formed in a combustion chamber has a first air fuel ratio, and a lean-burn mode in which the air-fuel mixture in the combustion chamber has a second air fuel ratio that is larger than said first air fuel ratio, depending upon an operating state of the engine;
- and
- failure detecting means for detecting a failure of the electronic control device,
- wherein said combustion mode control device inhibits the lean-burn mode regardless of the operating state of the engine, when said failure detecting means determines that said throttle valve is stuck at a position in which an opening of the throttle valve is equal to or smaller than a second predetermined value.
A control apparatus of an internal combustion engine equipped with an electronic control device that sets a target throttle opening based on at least an operated state of an accelerator operating device, and electrically drives a throttle valve disposed in an intake passage by means of an actuator, so that the throttle valve reaches the target throttle opening, comprising:
- failure detecting means for detecting a failure of the electronic control device;
- intake air supply means for supplying a predetermined amount of intake air to the engine,
- wherein said control apparatus actuates intake air supply means when a failure detected by said failure detecting means is other than a failure detected when the throttle valve is stuck at a position in which an opening of the throttle valve is equal to or larger than a first predetermined value.
A control apparatus of an internal combustion engine equipped with an electronic control device that electrically drives a throttle valve disposed in an intake passage by means of an actuator, comprising:
- an intake air device which includes a bypass passage that bypasses the throttle valve, and a control valve provided in the bypass passage, said control valve being opened so as to provide a given amount of intake air, irrespective of a state of the throttle valve;
- a combustion mode control device that selects a combustion mode from a normal combustion mode in which an air-fuel mixture formed in a combustion chamber has a first air fuel ratio, and a lean-burn mode in which the air-fuel mixture formed in the combustion chamber has a second air fuel ratio that is larger than said first air fuel ratio, depending upon an operating state of the engine;
- and
- failure detecting means for detecting a failure of the electronic control device,
- wherein said combustion mode control device selects the lean-burn mode regardless of the operating state of the engine, when a failure of said control valve is detected by said failure detecting means.
A control apparatus of an internal combustion engine equipped with an electronic control device that electrically drives a throttle valve disposed in an intake passage by means of an actuator, comprising:
- a failure detecting device that detects a failure of the electronic control device;
- a bypass control device which includes a bypass passage that bypasses the throttle valve, and a control valve provided in said bypass passage, said control valve being opened so as to provide a given amount of intake air when a failure of the electronic control device is detected by said failure detecting device;
- and
- driver s demand detecting means for detecting a driver s demand for an output of the engine;
- fuel supply means for controlling fuel supply to a plurality of cylinders of the engine,
- wherein said fuel supply means stops fuel supply to at least one of said plurality of cylinders, when said failure detecting device detects a failure of the electronic control device and said output demand detecting means does not detect the driver s demand for the output of the engine.
A control apparatus of an internal combustion engine equipped with an electronic control device that electrically drives a throttle valve disposed in an intake passage by means of an actuator, comprising:
- a failure detecting device which detects a failure of the electronic control device;
- a bypass control device that includes a bypass passage that bypasses a throttle valve, and a control valve disposed in said bypass passage, said bypass control device opening the control valve so as to provide a given amount of intake air when said failure detecting device detects a failure of the electronic control device;
- and
- brake detecting means for detecting an operated state of a brake pedal,
- wherein said bypass control device controls said control valve so as to limit an amount of intake air flowing through said bypass passage when said failure detecting device detects a failure of the electronic control device, and said brake detecting means determines that the brake pedal is depressed.
Dependencies are inferred from the claim text.