Title:
SHIFT CONTROL DEVICE FOR AUTOMATIC TRANSMISSION
Document Type and Number:
Japanese Patent JP3277966
Kind Code:
B2
Abstract:
PURPOSE: To improve the degree of freedom for setting a shift line by previously memorizing coordinates of both ends of respective straight lines constituting polygonal lines shoving 'vehicle speed-throttle opening characteristic', and judging to be shift up or shift down under a decided condition, after selecting a specific polygonal line.
CONSTITUTION: Vehicle speed V and throttle opening T are input from a vehicle speed sensor (a) and a throttle opening sensor (b) to a shift judging part (g), and based on these values, a straight line having minimum x2i or y2i realizing x2i>V or y2i>T is selected among respective straight lines of which coordinates (x1i, y1i), (x2i, y2i) (i=1, 2, 3,...) of both ends of respective straight lines constituting polygonal lines are memorized. J When (T-y1i).(x2i-x1i)<(V-x1i).(y2i-y1i) is realized, it is Judged to be shift up, and when (T-y1i).(x2i-x1i)>(V- x1i).(y2i-y1i) is realized, it is judged to be shift down. Based on the judged result, a gear changeover actuator (e) is driven for shifting.
Inventors:
Naonori Iizuka
Application Number:
JP24312193A
Publication Date:
April 22, 2002
Filing Date:
September 29, 1993
Export Citation:
Assignee:
JATCO TRANSTECHNOLOGY CO., LTD.
International Classes:
F16H61/00; F16H61/02; F16H61/10; F16H59/24; F16H59/44; (IPC1-7): F16H61/10
Domestic Patent References:
| JP50157838U | ||||
| JP322328B2 | ||||
| JP55500122A |
Attorney, Agent or Firm:
Satoru Asakura (4 outside)