Apparatus for controlling an automatic transmission

a technology for automatic transmission and automatic transmission, applied in the direction of machine/engine, process and machine control, instruments, etc., can solve the problems of difficulty in maintaining constant vehicle speed, constant travel speed,

Inactive Publication Date: 2001-08-16
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

0012] FIG. 4 is a flow chart showing a subroutine for gear cha

Problems solved by technology

Such a conventional automatic gear change controller, however, has a problem in maintaining a constant travel speed.
That is, even though the travel load of a vehicle is changed, for example, when the road elevation changes from being level to an uphill, no control is carried out for changing the gear shift stage, causing difficulty in maintaining constant vehicle speed.

Method used

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  • Apparatus for controlling an automatic transmission
  • Apparatus for controlling an automatic transmission
  • Apparatus for controlling an automatic transmission

Examples

Experimental program
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Embodiment Construction

[0013] Referring to the accompanying drawings, embodiments of the present invention will be described below.

[0014] FIG. 1 shows an outline of an apparatus for controlling an automatic transmission and the gear shift stage thereof.

[0015] An inlet pipe or intake manifold 12 of an internal combustion engine 10 is provided with a throttle valve 14 for controlling the volume of intake air sucked from the outside of a vehicle. The throttle valve 14 is provided with a throttle valve running gear (not shown) for switching and running the throttle valve 14 in response to a throttle valve switching control signal as described later. The throttle valve 14 is further provided with a throttle valve opening sensor 16 for detecting the opening of the throttle valve 14. The inlet pipe 12 is also provided with an intake pipe pressure sensor for detecting the pressure of intake air and an intake-air temperature sensor (not shown) for detecting the temperature of intake air. The inlet pipe 12 is furth...

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PUM

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Abstract

An automatic gear change controller, having a constant speed travel mode, which can transmit torque to wheels of a vehicle according to changes in the travel load of the vehicle even though a gear shift mode is changed to the manual gear shift mode. When the gear shift mode is set in the manual gear shift mode and the travel mode is set in a constant speed travel mode, a constant speed travel controller generates a downshift command signal. In this case, when the accelerator pedal is depressed beyond a predetermined amount, the gear shift stage of the automatic transmission is downshifted.

Description

[0001] 1. Field of the Invention[0002] The present invention relates to an apparatus for controlling an automatic transmission of a vehicle and, more particularly, to an apparatus for controlling an automatic transmission which selectively sets either of two gear shift modes, an automatic gear shift mode and a manual gear shift mode, and controls the automatic transmission according to the set gear shift mode.[0003] 2. Description of the Related Art[0004] An apparatus for controlling an automatic transmission of a vehicle is disclosed in Japanese patent application laid-open No. 8-193656. The device has a gear change controller, which selectively sets either of two gear shift modes, an automatic gear shift mode and a manual gear shift mode. The device controls the automatic transmission according to the set gear shift mode and a constant speed travel controller controls the travel speed so as to be substantially constant when the travel mode of a vehicle is set in constant speed tra...

Claims

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Application Information

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IPC IPC(8): B60K31/00B60K31/04B60W10/04B60W10/06B60W10/10B60W10/11B60W30/00B60W30/14F02D29/00F02D29/02F16H59/02F16H59/68F16H61/04
CPCB60K31/04B60W2540/10B60W2710/0605F16H59/0204B60W10/06B60W10/11B60W30/143B60W2710/1005F16H2059/0239Y10T477/676Y10T477/693
InventorMORITA, YUKIOKONNNO, KAZUYUKIHAGIWARA, KENJISHIMADA, TAKAMICHI
OwnerHONDA MOTOR CO LTD