Title:
【発明の名称】制御システム
Document Type and Number:
Japanese Patent JP2597354
Kind Code:
B2
Abstract:
In a manual mode of a switch (40) engine speed control is determined by signal (SLP) from a speed lever (52), acting on the engine (10) by way of a governor (32) responsive also to an engine speed feedback signal from a sensor (48). The ratio of a multi-speed transmission is determined manually by means of a gear-shift lever (16). In an automatic mode a selector switch (42) determined whether the speed lever (52) commands engine speed or ground speed. In the former case the governor (32) acts as in the manual mode and an electronic control unit (30) takes over the transmission ratio selection via a stepping motor (24) and shifts down or up as may be needed to prevent the engine speed drooping or rising outside a permissible band centred on the commanded engine speed. In the automatic, ground speed mode, the speed lever signal (SLP) is treated as a commanded ground speed signal which the control unit (30) compares with actual ground speed, computed from the actual engine speed signal and the current transmission ratio or gear number signalled by an encoder (26). The control unit (30) now determines the signal (ESC) which commands engine speed (instead of SLP) and also selects the appropriate transmission ratio via the stepping motor (24). Transmission shifts are delayed by time periods which are a function of maximum obtainable vehicle ground speed in the gear ratios being shifted to.
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Inventors:
Kevin Douglas McKee
Brian Alvin Ahlshweed
David Eugene Brandon
Brian Alvin Ahlshweed
David Eugene Brandon
Application Number:
JP16901186A
Publication Date:
April 02, 1997
Filing Date:
July 17, 1986
Export Citation:
Assignee:
Day-A and Company-
International Classes:
B60K31/00; B60K31/04; B60W10/06; B60W10/04; B60W10/10; B60W30/00; B60W30/14; F02D29/00; F02D29/02; F02D41/04; F02D41/14; F16H61/02; F16H61/08; F16H63/40; B60K31/18; F16H59/44; F16H59/70; F16H61/00; F16H61/12; F16H61/70; (IPC1-7): B60K41/06; B60K31/00; F02D29/00; F02D29/02
Domestic Patent References:
| JP60121127A | ||||
| JP59126142A | ||||
| JP53100574A |
Attorney, Agent or Firm:
Kyozo Yuasa (5 people outside)