Engine deceleration control device
AssigneeNissan Motor Co., Ltd.
InventorsMasahiko Hashimoto, Naoki Osada
Life of this patent
Estimating the term…
Abstract
Undershoot of rotation speed is prevented by increasing an intake air amount of an engine when it decelerates. Precise control corresponding to differences of a deceleration state is realized by setting an increase amount of intake air to a different value according to the engine rotation speed and deceleration. Preferably, increasing of intake air amount starts when the engine rotation speed reaches a first predetermined value. It is terminated when the engine rotation speed reaches a second predetermined value smaller than the first predetermined value or when a predetermined time has elapsed, whichever is the sooner.
Claims11
A device for controlling an engine in a deceleration state, comprising:
- a valve for increasing or decreasing an engine intake air amount;
- a sensor for detecting an engine rotation speed;
- and
- a microprocessor programmed to:
- calculate a deceleration of the engine from the engine rotation speed,
- set an opening increase correction amount of said valve according to the engine rotation speed and said engine deceleration,
- perform a correction of an opening of said valve based on said increase correction amount, and
- set said increase correction amount to be larger the larger said deceleration.
A device for controlling an engine in a deceleration state, comprising:
- a valve for increasing or decreasing an engine intake air amount;
- a sensor for detecting an engine rotation speed;
- and
- a microprocessor programmed to:
- calculate a deceleration of the engine from the engine rotation speed,
- set an opening increase correction amount of said valve according to the engine rotation speed and said engine deceleration,
- perform a correction of an opening of said valve based on said increase correction amount,
- start said correction of said valve opening when said engine rotation speed is equal to or less than a first predetermined rotation speed, and
- terminate said correction of said valve opening when said engine rotation speed has decreased to a second predetermined rotation speed which is less than said first predetermination rotation speed, or when a predetermined time has elapsed from when said correction of said valve opening was started, whichever timing is the sooner.
A device for controlling an engine in a deceleration state, comprising:
- a valve for increasing or decreasing an engine intake air amount;
- a sensor for detecting an engine rotation speed;
- and
- a microprocessor programmed to:
- calculate a deceleration of the engine from the engine rotation speed,
- set an opening increase correction amount of said valve according to the engine rotation speed and said engine deceleration,
- perform a correction of an opening of said valve based on said increase correction amount,
- start said correction of said valve opening when said engine rotation speed is equal to or less than a first predetermined rotation speed, and
- set said first predetermined rotation speed to a larger value the larger said deceleration.
A device for controlling an engine in a deceleration state, comprising:
- a valve for increasing or decreasing an engine intake air amount;
- a sensor for detecting an engine rotation speed;
- and
- a microprocessor programmed to:
- calculate a deceleration of the engine from the engine rotation speed,
- set an opening increase correction amount of said valve according to the engine rotation speed and said engine deceleration, and
- perform a correction of an opening of said valve based on said increase correction amount, wherein
- said engine comprises a spark plug for igniting a fuel-air mixture, and said microprocessor is further programmed to advance an ignition timing of said spark plug in response to said correction of said valve opening.
A device for controlling an engine in a deceleration state, comprising:
- a valve for increasing or decreasing an engine intake air amount;
- a sensor for detecting an engine rotation speed;
- and
- a microprocessor programmed to:
- calculate a deceleration of the engine from the engine rotation speed,
- set an opening increase correction amount of said valve according to the engine rotation speed and said engine deceleration, and
- perform a correction of an opening of said valve based on said increase correction amount, wherein
- said valve is an auxiliary air valve which bypasses a throttle of the engine.
A device for controlling an engine in a deceleration state, comprising:
- a valve for increasing or decreasing an engine intake air amount,
- means for detecting an engine rotation speed,
- means for calculating a deceleration of the engine from the engine rotation speed,
- means for setting an opening increase correction amount of said valve according to the engine rotation speed and said engine deceleration, and
- means for performing a correction of an opening of said valve based on said increase correction amount.
Dependencies are inferred from the claim text.