Downshifting time torque-down control device and method

Details Downshifting time torque-down control device and method Downshifting time torque-down control device and method

2005-08-16

2005-08-16

Wright, Dirk (Department: 3681)

Interrelated power delivery controls, including engine control

Transmission control

Engine ignition control for transmission change

C477S109000

Reexamination Certificate

active

06929581

ABSTRACT:
In a torque-down control device, an entire delay amount SB of ignition timing is restricted using a guard value GSB. Also, when a rotational speed change ΔNT of a turbine speed NT during delay control falls out of an allowable range, the feedback control of the entire delay amount SB is performed based on the rotational speed change ΔNT is equal to a target rotational speed change ΔNTT. Accordingly, an excessive decrease in engine torque even when downshifting is performed simultaneously with delay control by a knock control portion. Further, the feedback control of the entire delay amount SB is performed based on the rotational speed change ΔNT, and the guard value GSB is learned and corrected based on the feedback correction amount. Accordingly, an appropriate shifting characteristic can be obtained regardless of individual differences and change with time.

REFERENCES:
patent: 5188005 (1993-02-01), Sankpal et al.
patent: 6024669 (2000-02-01), Iwatsuki et al.
patent: 6687591 (2004-02-01), Abe
patent: 5-43528 (1993-07-01), None

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