Engine torque control device
AssigneeNissan Motor Co., Ltd.
InventorsTetsuya Shimada, Masahiro Iriyama
Life of this patent
Estimating the term…
Abstract
An engine torque control device is configured to reduce shift shock while shortening shift time and improving shift response in an engine equipped with a shifting unit. In the engine torque control device engine output torque is subjected to feedback control so that the engine speed will be the target speed (synchronizing speed) after a downshift. The feedback control includes at least a proportional control and a differential control. The differential control is halted until the difference between the synchronizing speed and the actual engine speed is equal to or less than a specified value. Differential control is only performed at or below this specified value.
Claims12
An engine torque control device comprising:
- a shifting control section configured to selectively operate a clutch that is disengaged during a downshift to attain a neutral state of a shifting unit;
- and
- an engine output torque control section configured to perform feedback control of an engine output torque from an engine such that an actual engine speed approaches a target speed after downshifting and the clutch is engaged to perform a shift after the engine speed has been synchronized,
- the engine output torque control section being further configured to perform the feedback control with at least a proportional control and a differential control, with the differential control being halted until a difference between the target speed and the actual engine speed is equal to or less than a specified value.
An engine torque control device comprising:
- shifting control means for selectively operating a clutch that is disengaged during a downshift to attain a neutral state of a shifting unit;
- and
- engine output torque control means for performing feedback control of an engine output torque from an engine such that an actual engine speed approaches a target speed after downshifting and the clutch is engaged to perform a shift after the engine speed has been synchronized, and for performing the feedback control with at least a proportional control and a differential control, with the differential control being halted until a difference between the target speed and the actual engine speed is equal to or less than a specified value.
A method of controlling engine torque comprising:
- selectively operating a clutch that is disengaged during a downshift to attain a neutral state of a shifting unit;
- and
- performing feedback control of an engine output torque from an engine such that an actual engine speed approaches a target speed after downshifting and the clutch is engaged to perform a shift after the engine speed has been synchronized,
- the performing of the feedback control including at least a proportional control and a differential control, with the differential control being halted until a difference between the target speed and the actual engine speed is equal to or less than a specified value.
Dependencies are inferred from the claim text.