# US 6,295,884 B1 · Control method and control apparatus of gear transmission

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- Number: US 6,295,884 B1
- Document ID: US6295884B1
- Status: Granted
- Kind: B1
- Application number: 09/410,032
- Filed: 1999-10-01
- Granted: 2001-10-02
- Earliest claimed: 1998-10-29
- Assignees: Aisin Ai Co., Ltd.
- Inventors: Tatsuhiro Miyake; Takeshige Miyazaki
- Web page: https://patentgrep.com/patent/US6295884B1

## CPC

- F16H 61/0437: {by using electrical signals (F16H61/0403 and F16H61/061 take precedence)}
- F16H 61/2807: {using electric control signals for shift actuators, e.g. electro-hydraulic control therefor (F16H61/30, F16H61/32 take precedence)}
- F16H 59/18: dependent on the position of the accelerator pedal
- F16H 59/24: dependent on the throttle opening
- F16H 61/30: Hydraulic {or pneumatic} motors {or related fluid control means} therefor
- F16H 2059/425: {Rate of change of input or turbine shaft speed}
- F16H 2061/2823: {Controlling actuator force way characteristic, i.e. controlling force or movement depending on the actuator position, e.g. for adapting force to synchronisation and engagement of gear clutch}
- Y10T 74/19251: Control mechanism
- F16H: GEARING
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

An automatic speed-change control and an method speed-change control apparatus of an actuator which automatically drives a speed-change mechanism in a manual gear transmission of an automobile, includes an operating mechanism for controlling the operation of the actuators, a detecting mechanism for judging a speed-change timing and detecting the degree of accelerator depression, a calculating mechanism for calculating an operating factor corresponding to the degree of accelerator depression detected by the detecting mechanism to set a drive amount to the actuator so that the actuator operates by the calculated operate factor, and a command mechanism for supplying the drive amount to the actuator calculated by the calculating means and giving an operating command to the actuator.

## Claims

### Claim 1

A synchromesh-type transmission comprising a gear train for speed-change, a synchromesh mechanism for changing a combination of gears in the gear train, an actuator for actuating the synchromesh mechanism, and a control apparatus for controlling operation of the actuator, said control apparatus including:
judging means for judging a shifting of a shifting lever and for detecting an accelerator opened degree;
calculating means for calculating a shifting time of the actuator corresponding to the detected accelerator opened degree based on a predetermined map which sets forth a relationship between the accelerator opened degree and the shifting time of the actuator so that as the accelerator opened degree becomes smaller the shifting time becomes longer and so that as the accelerator opened degree becomes larger the shifting time becomes shorter;
command means for determining an operating speed of the actuator which will complete a speed-change within the calculated shifting time and for commanding the actuator based on the determined operating speed.

### Claim 2 (depends on 1)

The synchromesh-type transmission according to the claim 1, wherein the actuator is a hydraulic cylinder, and said command means determines a pressure and a flowing amount of an oil of the hydraulic cylinder for operating the actuator at the operating speed.

### Claim 3 (depends on 1)

The synchromesh-type transmission according to the claim 1, wherein the actuator is an electric motor, and said command means determines a flowing current amount of the electric motor for operating the actuator at the operating speed.