Engine torque compensation shift scheduling of an automatic tran

Details Engine torque compensation shift scheduling of an automatic tran Engine torque compensation shift scheduling of an automatic tran

1993-10-06

1995-11-28

Ta, Khoi Q.

Interrelated power delivery controls, including engine control

Transmission control

Engine controlled by transmission

3644241, 477174, 477902, B60K 4106, F16H 5914

Patent

active

054702887

ABSTRACT:
A system and method for controlling gear ratio changes in an automatic transmission includes an electronic microprocessor, an electronic memory accessible to the microprocessor, solenoid-operated shift valves, pressure actuated friction clutches and brakes, a variable force solenoid-operated valve, a torque converter bypass friction clutch, and control algorithms that produce output signals to control the state of the solenoid-operated valves. The vehicle speed and engine speed at which upshifts and downshifts occur, according to a standard gear shift schedule, is compensated for loss of engine torque at conditions that differ from the conditions at which a reference shift schedule is defined. Vehicle speed is compensated for torque variation with reference to the ratio of current calculated engine torque divided by current engine output torque.

REFERENCES:
patent: 3807497 (1989-02-01), Yasue et al.
patent: 4228700 (1980-10-01), Espenschied et al.
patent: 4474081 (1984-10-01), Kinugasa et al.
patent: 4577737 (1986-03-01), Niikura et al.
patent: 4625590 (1986-12-01), Muller
patent: 4662247 (1987-05-01), Sotoyama et al.
patent: 4688450 (1987-08-01), Hayashi et al.
patent: 4737915 (1988-04-01), Hosaka
patent: 4742733 (1988-05-01), Schreiner
patent: 4777848 (1988-10-01), Taga et al.
patent: 4868753 (1989-09-01), Mori
patent: 4943921 (1990-07-01), Baltusis et al.
patent: 5035160 (1991-07-01), Morita
patent: 5062321 (1991-11-01), Koenig et al.
patent: 5069083 (1991-12-01), Hirano et al.
patent: 5069084 (1991-12-01), Matsuno et al.
patent: 5086665 (1992-02-01), Milunas et al.
patent: 5107724 (1992-04-01), Takizawa
patent: 5138905 (1992-08-01), Kouno
patent: 5150297 (1992-09-01), Daubenmier et al.
patent: 5157609 (1992-10-01), Stehle et al.
patent: 5166879 (1992-11-01), Greene et al.
patent: 5172609 (1992-12-01), Nitz et al.
patent: 5182710 (1993-01-01), Tomisawa
patent: 5241855 (1993-09-01), Cullen et al.
patent: 5335568 (1994-08-01), Kammeri et al.
U.S. application Ser. No. 8,139,690, filed Oct. 22, 1993, "Automatic Transmission Torque Converter Bypass Clutch Control Using Engine Torque Compensation".

Affiliated with

Also associated with

Rating

Engine torque compensation shift scheduling of an automatic tran does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Engine torque compensation shift scheduling of an automatic tran, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Engine torque compensation shift scheduling of an automatic tran will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2009799