Automatic transmission controls with off-highway mode
This patent describes an improved automatic transmission system for vehicles having a throttle-controlled engine, an operator actuated throttling control, an operator actuated mode of operation selection and a transmission having gear ratio combinations selectively engageable between a transmission input shaft and a transmission output shaft. The transmission input shaft is operatively connected to the engine. The transmission system consists of: an information processing unit having the capability of receiving input signals including: (1) an input signal indicative of the position of the throttle control; (2) an input signal indicative of the rotational speed of the engine; and (3) an input signal indicative of the rotational speed of the output shaft. The processing unit includes a device for processing the input signals in accordance with a program to provide a predetermined gear ratio for a given combination of input signals and for generating output signals. The transmission is effective to actuate the transmission to effect engagement of one of the gear ratio combinations in response to the output signals from the processing unit.
- Assignee:
- Eaton Corp., Cleveland, OH
- Patent Number(s):
- US 4569255
- OSTI ID:
- 6043885
- Country of Publication:
- United States
- Language:
- English
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