Control system for automotive automatic transmission
AssigneeJATCO Ltd
InventorNaonori Iizuka
Life of this patent
Estimating the term…
Abstract
A control system for controlling an automatic transmission on a motor vehicle is disclosed. The control system comprises a vehicle speed sensor for detecting the vehicle speed; an engine load sensor for detecting the engine load; a brake pedal depression degree sensor for detecting the degree by which the brake pedal is depressed; and a downshift control device for forcing the transmission to carry out a downshift when the vehicle speed is lower than a predetermined speed, the engine load is lower than a predetermined load and the brake pedal depression degree is greater than a predetermined depression degree. The control system further comprises a changing device changes the predetermined depression degree in accordance with the condition which the transmission assumes.
Claims8
A control system for controlling an automatic transmission on a motor vehicle, said control system comprising:
- a vehicle speed sensor for detecting the speed at which the vehicle moves;
- an engine load sensor for detecting the engine load;
- a brake pedal depression degree sensor for detecting the degree by which the brake pedal is depressed;
- a downshift control means for forcing said transmission to carry out a downshift when the vehicle speed is lower than a predetermined speed, the engine load is lower than a predetermined load and the brake pedal depression degree is greater than a predetermined depression degree;
- and
- changing means for varying said predetermined depression degree in accordance with a select range which the transmission assumes.
A control system for controlling an automotive automatic transmission having at least a first D-range in which an overdrive is permitted and a second D-range in which the overdrive is inhibited, said control system comprising:
- a vehicle speed sensor for detecting the speed at which the vehicle moves;
- an engine load sensor for detecting the engine load;
- a brake pedal depression degree sensor for detecting the degree by which the brake pedal is depressed;
- a downshift control means for enforcedly carrying out a downshift of the transmission when the vehicle speed is lower than a predetermined speed, the engine load is lower than a predetermined load and the brake pedal depression degree is greater than a predetermined depression degree;
- and
- changing means for varying said predetermined depression degree in accordance with a select range which the transmission assumes.
Dependencies are inferred from the claim text.