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Title: Method for controlling a motor vehicle powertrain

Abstract

A multiple forward speed automatic transmission produces its lowest forward speed ratio when a hydraulic clutch and hydraulic brake are disengaged and a one-way clutch connects a ring gear to the transmission casing. Second forward speed ratio results when the hydraulic clutch is engaged to connect the ring gear to the planetary carrier of a second gear set. Reverse drive and regenerative operation result when an hydraulic brake fixes the planetary and the direction of power flow is reversed. Various sensors produce signals representing the position of the gear selector lever operated manually by the vehicle operator, the speed of the power source, the state of the ignition key, and the rate of release of an accelerator pedal. A control algorithm produces input data representing a commanded upshift, a commanded downshift and a torque command and various constant torque signals. A microprocessor processes the input and produces a response to them in accordance with the execution of a control algorithm. Output or response signals cause selective engagement and disengagement of the clutch and brake to produce the forward drive, reverse and regenerative operation of the transmission. 7 figs.

Inventors:
; ; ;
Issue Date:
Research Org.:
Ford Motor Co
OSTI Identifier:
7268897
Patent Number(s):
4928227 A
Application Number:
PPN: US 7-115799
Assignee:
Ford Motor Co., Dearborn, MI (United States) IDO; EDB-94-116113
DOE Contract Number:  
AC07-85NV10418
Resource Type:
Patent
Resource Relation:
Patent File Date: 2 Nov 1987
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; AUTOMOBILES; MECHANICAL TRANSMISSIONS; COMPUTERIZED CONTROL SYSTEMS; ALGORITHMS; OPERATION; REGENERATIVE BRAKING; CONTROL SYSTEMS; MACHINE PARTS; MATHEMATICAL LOGIC; ON-LINE CONTROL SYSTEMS; ON-LINE SYSTEMS; VEHICLES; 330602* - Vehicle Design Factors- Engine-Transmission Matching

Citation Formats

Burba, J.C., Landman, R.G., Patil, P.B., and Reitz, G.A. Method for controlling a motor vehicle powertrain. United States: N. p., 1990. Web.
Burba, J.C., Landman, R.G., Patil, P.B., & Reitz, G.A. Method for controlling a motor vehicle powertrain. United States.
Burba, J.C., Landman, R.G., Patil, P.B., and Reitz, G.A. Tue . "Method for controlling a motor vehicle powertrain". United States.
@article{osti_7268897,
title = {Method for controlling a motor vehicle powertrain},
author = {Burba, J.C. and Landman, R.G. and Patil, P.B. and Reitz, G.A.},
abstractNote = {A multiple forward speed automatic transmission produces its lowest forward speed ratio when a hydraulic clutch and hydraulic brake are disengaged and a one-way clutch connects a ring gear to the transmission casing. Second forward speed ratio results when the hydraulic clutch is engaged to connect the ring gear to the planetary carrier of a second gear set. Reverse drive and regenerative operation result when an hydraulic brake fixes the planetary and the direction of power flow is reversed. Various sensors produce signals representing the position of the gear selector lever operated manually by the vehicle operator, the speed of the power source, the state of the ignition key, and the rate of release of an accelerator pedal. A control algorithm produces input data representing a commanded upshift, a commanded downshift and a torque command and various constant torque signals. A microprocessor processes the input and produces a response to them in accordance with the execution of a control algorithm. Output or response signals cause selective engagement and disengagement of the clutch and brake to produce the forward drive, reverse and regenerative operation of the transmission. 7 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1990},
month = {5}
}