Title:
CONTROLLER OF POWER TRAIN
Document Type and Number:
Japanese Patent JP3177538
Kind Code:
B2
Abstract:
PURPOSE: To reduce shock caused by a gear shift during lean-burn operation by executing speed change control according to a shiftup line which is set to a value lower than each vehicle speed corresponding to engine speed at which the operation range is switched from lean-burn to rich side or vice versa.
CONSTITUTION: An automatic transmission AT is disposed on the output side of an engine E and comprises a torque convertor C and main and subsidiary transmissions MT, ST. In this case, an operational range setting means 2 sets a lean-burn operation range in which operation is performed with the air-fuel ratio of the engine E set to lean-burn side and a rich operation range in which operation is performed with the air-fuel ratio set to rich side. Speed change control is executed by a controller 1 according to detection signals from a throttle opening sensor 3 and a vehicle speed sensor 4 and to a specific shiftup line; i.e., the specific shiftup line is set to be lower than each vehicle speed corresponding to engine speed at which the operational range is switched from the lean-burn to rich side or vice versa.
Inventors:
Seisuke Mitsunaga
Application Number:
JP13893892A
Publication Date:
June 18, 2001
Filing Date:
May 29, 1992
Export Citation:
Assignee:
Mazda Corporation Inc
International Classes:
F02D29/00; F02D41/04; F16H61/00; F16H61/04; F16H61/10; (IPC1-7): F16H61/10; F02D29/00; F02D41/04
Domestic Patent References:
| JP3271029A | ||||
| JP62242169A | ||||
| JP464766A | ||||
| JP62165053A | ||||
| JP61187545A | ||||
| JP58214648A | ||||
| JP62233435A | ||||
| JP5104990A |
Attorney, Agent or Firm:
Hiroshi Maeda
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