Enhanced missed shift from neutral recovery for automated or sem

Details Enhanced missed shift from neutral recovery for automated or sem Enhanced missed shift from neutral recovery for automated or sem

1992-12-18

1993-11-16

Braun, Leslie A.

Machine element or mechanism

Gearing

Interchangeably locked

74336R, F16H 546

Patent

active

052612880

ABSTRACT:
A control system (104) for controlling execution of selected upshifts and downshifts of a mechanical transmission system (10) is provided. The control system includes a central processing unit (106) for receiving input signals indicative of engine (11) and output shaft (90) speeds and from a driver control console (108) indicative of manual or automatic selection of upshifts or downshifts from a currently engaged gear ratio and processing the same in accordance with predetermined logic rule to issue command output signals to a transmission actuator (112, 70, 96) to implement the selected shifts upon a manual or automatic caused torque break of the transmission and manual or automatic substantial synchronization of the transmission thereafter. The predetermined logic rules include an algorithm providing enhanced recovery from a missed shift and stuck in neutral condition including rules for selecting a more easily engaged ratio (GR.sub.MSR) in view of current engine speed (ES.sub.CURRENT) and vehicle speed (OS).

REFERENCES:
patent: 4361060 (1982-11-01), Smyth
patent: 4690008 (1987-09-01), Klatt
patent: 4702127 (1987-10-01), Cote
patent: 4989471 (1991-02-01), Bulgrien
patent: 5053961 (1991-10-01), Genise
patent: 5053962 (1991-10-01), Genise
patent: 5063511 (1991-11-01), Mack et al.
patent: 5099711 (1992-03-01), Langbo et al.

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