Gear change controller for automatic transmission

Details Gear change controller for automatic transmission Gear change controller for automatic transmission

1994-09-14

1996-11-26

Park, Collin W.

Boots, shoes, and leggings

477 34, B60K 4106

Patent

active

055792260

ABSTRACT:
A gear control means determines the gear position of an automatic transmission based on a vehicle speed V and throttle opening T input from a vehicle speed sensor and throttle opening sensor, and on a predetermined gear change-over lines which take form of kinked lines expressing "vehicle speed/throttle opening" characteristics for up-shifting and down-shifting respectively. The gear control means is provided with a memory unit and a gear determining unit. To increase the freedom in setting the gear change-over lines, the memory unit first stores the coordinates (x1i, y1i) and (x2i, y2i) of the two ends of each of the linear portions forming the kinked lines, and the gear determining unit selects the linear portion for which the expression x2i>V is satisfied and having the minimum value of x2i, and determines that a shift to higher gear position should be made if the condition (T-y1i) (x2i-x1i)<(V-x1i)(y2i-y1i) occurs with respect to a kinked line for up-shifting, or that a shift to lower gear position should be made if the condition (T-y1i)(x2i-x1i)>(V-x1i)(y2i-y1i) occurs with respect to a kinked line for down-shifting.

REFERENCES:
patent: 4269281 (1981-05-01), Schneider et al.
patent: 4353272 (1982-10-01), Schneider et al.
patent: 5231897 (1993-08-01), Morita
patent: 5235875 (1993-08-01), Yoshida et al.
patent: 5245541 (1993-09-01), Tomomatsu
patent: 5345843 (1994-09-01), Fujita et al.
Taschenbuch der Mathematik, by I. N. Bronstein & K. A. Semendjajew, Verlag Harri Deutsch, Zurich und Frankfurt/Main, 1974 (No translation).

Affiliated with

Also associated with

Rating

Gear change controller for automatic transmission does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Gear change controller for automatic transmission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gear change controller for automatic transmission will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1977941