Automatic transmission of electronic control type

Details Automatic transmission of electronic control type Automatic transmission of electronic control type

1990-12-27

1992-07-28

Braun, Leslie A.

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

B60K 4108

Patent

active

051332302

ABSTRACT:
Herein disclosed is an automatic transmission of electronic control type, which has hydraulic control for improving the shift feel of the automatic transmission. This automatic transmission includes an oil pressure source; a line pressure regulating valve for regulating the output oil pressure of the oil pressure a source to a line pressure; line pressure controller for sending an oil pressure signal for changing the line pressure to the line pressure regulating valve in response to an electric signal; an r.p.m. sensor for detecting the start and end of a shift; and an electronic controller for changing the electric signal to the line pressure controller stepwise in an open loop in a manner to correspond to the divisions of the shift which include at least starting, ending and intermediate stages.

REFERENCES:
patent: 4685356 (1987-08-01), Iwatsuki
patent: 4707789 (1987-11-01), Dowas et al.
patent: 4748870 (1988-06-01), Sugino et al.
patent: 4838126 (1989-06-01), Wilfinger et al.
patent: 4855913 (1989-08-01), Brekkestran et al.

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