Automatic range shift for multi-speed transmission

Details Automatic range shift for multi-speed transmission Automatic range shift for multi-speed transmission

1997-08-28

1999-07-27

Wright, Dirk

Interrelated power delivery controls, including engine control

Transmission control

Engine controlled by transmission

74336R, 477908, B60K 4108, F16H 5908

Patent

active

059281090

ABSTRACT:
A system for automatically effecting a range shift between high and low ranges in a multi-speed transmission includes a control that monitors the output speed of both the engine and the transmission. The ratio of the two speeds is compared to available ratios in a look-up table such that the control is constantly determining the engaged gear. In one embodiment, a driver provides an intention of the next gear to be selected to the control. Should the intended gear shift require a range shift from the engaged gear, the control actuates the range shift once the transmission has been moved to neutral. In a second embodiment, no driver intention is provided to the controller. Instead, the control compares the engine output speed to threshold values. If the threshold values predict a gear shift that would require a range shift to be effected from the currently engaged gear, then the range shift will be effected once the transmission has been moved to neutral.

REFERENCES:
patent: 3171300 (1965-03-01), Perkins et al.
patent: 3939722 (1976-02-01), Stromberg
patent: 4312248 (1982-01-01), Sugimoto et al.
patent: 4527447 (1985-07-01), Richards
patent: 4593580 (1986-06-01), Schulze
patent: 4690008 (1987-09-01), Klatt
patent: 4722248 (1988-02-01), Braun
patent: 4788875 (1988-12-01), Genise
patent: 4944197 (1990-07-01), Stine et al.
patent: 4974474 (1990-12-01), Newbigging
patent: 4991099 (1991-02-01), Markyvech
patent: 5038627 (1991-08-01), Schwaiger et al.
patent: 5042327 (1991-08-01), Stainton
patent: 5050079 (1991-09-01), Steeby
patent: 5053959 (1991-10-01), Genise
patent: 5053961 (1991-10-01), Genise
patent: 5109730 (1992-05-01), Zahn et al.
patent: 5172604 (1992-12-01), Monette et al.
patent: 5186066 (1993-02-01), Pankratz et al.
patent: 5193410 (1993-03-01), Stine et al.
patent: 5199312 (1993-04-01), Huggins et al.
patent: 5199314 (1993-04-01), Hutchison
patent: 5216931 (1993-06-01), Hirsch et al.
patent: 5218878 (1993-06-01), Monette et al.
patent: 5222404 (1993-06-01), Stine
patent: 5224392 (1993-07-01), Hutchison et al.
patent: 5231895 (1993-08-01), Stine
patent: 5263379 (1993-11-01), Newbigging et al.
patent: 5329826 (1994-07-01), Graves, Jr. et al.
patent: 5411450 (1995-05-01), Gratton et al.
patent: 5435212 (1995-07-01), Menig

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