Apparatus and method for controlling rotation speed of internal combustion engine
AssigneeNissan Motor Co., Ltd.
InventorShinobu Kamada
Life of this patent
Estimating the term…
Abstract
Rotation speed control apparatus including an electronically controllable throttle valve capable of changing an intake air quantity, a variable compression ratio mechanism capable of changing a mechanical compression ratio, and an ECU configured to calculate a deviation between a target idle rotation speed and an actual rotation speed during idle operation, select either one or both of the intake air quantity and the mechanical compression ratio as control targets in accordance with magnitude of the deviation, and reduce the deviation by changing the selected either one or both of the intake air quantity and the mechanical compression ratio.
Claims15
An apparatus for controlling rotation speed of an internal combustion engine, comprising:
- an intake air quantity change section configured to change an intake air quantity in the internal combustion engine;
- a compression ratio change section configured to change a mechanical compression ratio in the internal combustion engine;
- a rotation speed detection section configured to detect actual rotation speed of the internal combustion engine;
- and
- a control section configured to calculate a deviation between a target rotation speed and the actual rotation speed during execution of rotation speed control to bring the actual rotation speed of the internal combustion engine close to the target rotation speed, select either one or both of the intake air quantity and the mechanical compression ratio as control targets in accordance with magnitude of the deviation, and reduce the deviation by changing the selected either one or both of the intake air quantity and the mechanical compression ratio.
An apparatus for controlling rotation speed of an internal combustion engine, comprising:
- an intake air quantity change section configured to change an intake air quantity in the internal combustion engine;
- a compression ratio change section configured to change a mechanical compression ratio in the internal combustion engine;
- and
- a rotation speed detection section configured to detect actual rotation speed of the internal combustion engine,
- wherein a deviation between a target rotation speed and the actual rotation speed is calculated during execution of rotation speed control to bring the actual rotation speed of the internal combustion engine close to the target rotation speed, either one or both of the intake air quantity and the mechanical compression ratio as control targets is selected in accordance with magnitude of the deviation, and the deviation is reduced by changing the selected either one or both of the intake air quantity and the mechanical compression ratio.
An apparatus for controlling rotation speed of an internal combustion engine, comprising:
- an intake air quantity changing means for changing an intake air quantity in the internal combustion engine;
- a compression ratio changing means for changing a mechanical compression ratio in the internal combustion engine;
- a rotation speed detection means for detecting actual rotation speed of the internal combustion engine;
- and
- a control means for calculating a deviation between a target rotation speed and the actual rotation speed during execution of rotation speed control to bring the actual rotation speed of the internal combustion engine close to the target rotation speed, the control means selecting either one or both of the intake air quantity and the mechanical compression ratio as control targets in accordance with magnitude of the deviation, the control means reducing the deviation by changing the selected either one or both of the intake air quantity and the mechanical compression ratio.
A method for controlling rotation speed of an internal combustion engine, comprising:
- changing an intake air quantity in the internal combustion engine;
- changing a mechanical compression ratio in the internal combustion engine;
- detecting actual rotation speed of the internal combustion engine;
- calculating a deviation between a target rotation speed and the actual rotation speed during execution of rotation speed control to bring the actual rotation speed of the internal combustion engine close to the target rotation speed;
- selecting either one or both of the intake air quantity and the mechanical compression ratio as control targets in accordance with magnitude of the deviation;
- and
- reducing the deviation by changing the selected either one or both of the intake air quantity and the mechanical compression ratio.
Dependencies are inferred from the claim text.