Transmission control device
A transmission control device is described having a speed change prohibition time setting function for setting a time wherein speed changing operation is prohibited in accordance with a running state of a vehicle and wherein the control device is used for controlling a transmission system having speed changing ratios and comprises a main transmission and a sub transmission connected to the output shaft of the main transmission. The device consists of: (a) electronic control means for receiving outputs from sensor means for sensing running state of a vehicle; (b) speed changing mechanism driving means controlled by the output from the electronic control means for driving and controlling the speed changing mechanisms in the main transmission and sub transmission; (c) speed change operation detecting means for detecting commencement of the speed change operation of the main transmission and the sub transmission; and (d) speed change prohibition time setting means for prohibiting, after detection of the commencement of the speed changing operation with one of the main and sub transmissions, the speed changing operation of the other of the main and sub transmissions over a predetermined prohibition time which corresponds to a level of a torque input of one of the main and sub transmissions.
- Assignee:
- Toyota Jidosha Kabushiki Kaisha
- Patent Number(s):
- US 4688449
- OSTI ID:
- 6095780
- Resource Relation:
- Patent File Date: Filed date 21 Jan 1986
- Country of Publication:
- United States
- Language:
- English
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