Control for an automatic transmission

Details Control for an automatic transmission Control for an automatic transmission

1988-11-25

1991-07-16

Gruber, Felix D.

Boots, shoes, and leggings

74866, B60K 4108, G06F 1520

Patent

active

050329936

ABSTRACT:
An automatic transmission is controlled by detecting engine rmp following a transmission downshift and comparing the detected engine speed with a predetermined speed value. If the detected speed does not exceed the predetermined value, the solenoids controlling the down-shift are maintained energized. If the detected speed exceeds the predetermined speed value, the solenoids are de-energized to prevent overrunning of the engine.

REFERENCES:
patent: 4208925 (1980-06-01), Miller et al.
patent: 4618041 (1986-10-01), Sotoyama et al.
patent: 4640394 (1987-02-01), Higashi et al.
patent: 4643048 (1987-02-01), Hattori et al.
patent: 4669335 (1987-06-01), Matsuoka et al.
patent: 4694709 (1987-09-01), Kikuchi et al.
patent: 4753134 (1988-06-01), Hayasaki
patent: 4753135 (1988-06-01), Sotoyama et al.
patent: 4783743 (1988-11-01), Yashiki et al.
patent: 4843909 (1989-07-01), Hasegawa et al.
patent: 4858501 (1989-08-01), King

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