US 2006/0234830 A1 · Engine torque control device

Abstract

An engine torque control device is configured to lessen shift shock while shortening the shift time during downshifting with an automatic transmission. When a downshift requirement is generated, a disengagement control of a higher gear clutch (current gear ratio) is commenced, and at the same time, a first synchronizing control is commenced. The first synchronizing control has a torque-up control with a first synchronizing speed DNe1 set as the target speed TNe, during a first control period. When the first control period has concluded and there is a transition to a second control period. In the second control period, an engagement control of a lower gear clutch (the post-shift gear ratio) is commenced, and at the same time, there is a switch to a second synchronizing control. In the second synchronizing control, the target speed TNe is set to a second synchronizing speed DNe2 at the post-shift gear ratio.

Claims20

Dependent claims

An engine torque control device comprising:

an automatic transmission control section configured to perform an automatic transmission control of an automatic transmission by selectively disengaging at least one engaged shift element, and selectively engaging at least one disengaged shift element;
and
an engine output torque control section configured to perform an engine output torque control of an engine output torque from an engine such that engine speed approaches a post-shift engine speed during a shift operation of the automatic transmission, the engine output torque control section being further configured to commence the engine output torque control before the at least one engaged shift element to be disengaged begins to be disengaged.

Dependencies are inferred from the claim text.

Engine torque control device

Life of this patent

Engine torque control device

Life of this patent

Abstract

Claims20