Failure mode shift pattern alteration for an electronically cont

Details Failure mode shift pattern alteration for an electronically cont Failure mode shift pattern alteration for an electronically cont

1987-09-28

1989-06-27

Gruber, Felix D.

Boots, shoes, and leggings

74866, B60K 4108, G60F 1550

Patent

active

048435511

ABSTRACT:
An electronic transmission control in which the shift pattern is adjusted in the event of a sensed clutch or gear failure so that shifting between the nonfailed ratios is carried out in a manner which avoids engine stalling or overspeeding and significant stressing of the transmission gear elements. The original shift point lines involving the failed ratio are removed and replaced with a single shift point line positioned intermediate the original two. The new shift point line is determined in accordance with an arithmetic combination of the original shift point lines, and is limited based on engine overspeed and driveability considerations.

REFERENCES:
patent: 4414863 (1983-11-01), Heino
patent: 4495457 (1985-01-01), Stahl
patent: 4499450 (1985-02-01), Makita
patent: 4523281 (1985-06-01), Noda et al.
patent: 4561055 (1985-12-01), McKee
patent: 4667541 (1987-05-01), Shimaoka et al.
patent: 4718307 (1988-01-01), Yabe et al.

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