Synchronized coast downshift control for hybrid vehicles

Details Synchronized coast downshift control for hybrid vehicles Synchronized coast downshift control for hybrid vehicles

1999-01-21

2000-02-01

Ta, Khoi Q.

Interrelated power delivery controls, including engine control

Electric engine

With transmission control

477 15, 477 3, 477 5, B60K 600

Patent

active

060196998

ABSTRACT:
A drive control system for a hybrid vehicle for preventing a delay in the application of a one-way clutch in a transmission and an application shock. In this drive control system, an electric motor and an internal combustion engine are coupled to the input side of a transmission having at least one gear stage to be set by applying a one-way clutch. The drive control system comprises: a detector for detecting a coasting state in which the one-way clutch is released in a deceleration state set with the gear stage; and an input speed raising device for driving the electric motor when the coasting state is detected, so that the input speed of the transmission may approach the synchronous speed which is the product of the gear ratio of the gear stage to be set by applying the one-way clutch and the output speed of the transmission.

REFERENCES:
patent: 5337848 (1994-08-01), Bader
patent: 5795260 (1998-08-01), Kim
patent: 5827148 (1998-10-01), Seto et al.
patent: 5833570 (1998-11-01), Tabata et al.

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