Patent EP0353310A1 successfully refreshed from Google Patents.
EP0353310A1
Expired / Lapsed
EP
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Automatic transmission for vehicles
Assignee: Komatsu Ltd
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Filing: 1989-01-27
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Granted: —
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Expires: 2009-01-27
Abstract
Abstract An automatic transmission for a vehicle which automatically carries out transmission control in relation to the running of the vehicle. In addition to an operation lever (111,112) such as a select lever, a hold switch (180) is provided for informing an automatic transmission controller (130) of the need for a hold operation to automatically hold the currently selected gear position (speed step) of the transmission (160). The hold operation is executed by the controller depending upon the operation of the hold switch. When the forward-reverse switching is effected after the hold switch is operated, furthermore. the transmission at the time of start is once switched (shifted) to the second speed step forcibly. As the desired speed step that is held is reached accompanying the rise of the vehicle speed, this speed step is automatically held as a result of the hold operation. Therefore, even vehicles for construction machinery such as wheel loaders are permitted to execute the operation efficiently and smoothly.
Inventors
- 👤 Masao Fukuda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 03:55
CPC Classifications
B; B60; B60K; B60K20/00; B60W; B60W30/00; B60W30/18; B60W10/00; B60W10/04; B60W10/10; B60W10/11; B60W30/1819; F; F16; F16H; F16H59/00; F16H59/02; F16H59/0204; F16H59/08; F16H59/10; F16H59/105; F16H61/00; F16H61/02; F16H61/0202; F16H61/0204; F16H61/0246; F16H2059/006; F16H2059/0239; F16H2059/082; F16H2059/088; F16H61/16; F16H2061/163; F16H61/70
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
141 words
An automatic speed changing apparatus for a vehicle including at least an actuating lever for shifting movement of said vehicle from forward movement to rearward movement and vice versa so that when said actuating lever is actuated to either of forward movement and rearward movement, a speed stage of the vehicle is automatically selected to match the movement speed of the vehicle at this time point, said automatic speed changing apparatus comprising; switch means adapted to be actuated independently of the actuating lever and controlling means for storing and maintaining control data on the speed stage automatically selected at this time point in response to actuation of said switch means to an ON side and then automatically maintaining the selected speed stage with the use of stored and maintained control data until the switch means is actuated to an OFF side.
Claim 2
Dependent Claim
141 words
An automatic speed changing apparatus for a vehicle including at least an actuating lever for shifting movement of said vehicle from forward movement to rearward movement and vice versa so that when said actuating lever is actuated to either of forward movement and rearward movement, a speed stage of the vehicle is automatically selected to match the movement speed of the vehicle at this time point, said automatic speed changing apparatus comprising; switch means adapted to be actuated independently of the actuating lever and controlling means for storing and maintaining control data on the speed stage automatically selected at this time point in response to actuation of said switch means to an ON side and then automatically maintaining the selected speed stage with the use of stored and maintained control data until the switch means is actuated to an OFF side.
Claim 3
Dependent Claim
208 words
An automatic speed changing apparatus for a vehicle including at least an actuating lever for shifting movement of said vehicle from forward movement to rearward movement and vice versa so that when said actuating lever is actuated to either of forward movement and rearward movement, a speed stage of the vehicle is automatically selected to match the movement speed of the vehicle at this time point, said automatic speed changing apparatus comprising; switch means adapted to be actuated independently of the actuating lever, first controlling means for storing and holding control data on the speed stage automatically selected at this time point in response to actuation of said switch means to an ON side and then automatically maintaining the selected speed stage with the use of stored and maintained control data until the switch means is actuated to an OFF side and second controlling means wherein when the actuating lever is shifted to other side while the switch means is shifted to the ON side, the speed stage is first forcibly controlled to a second speed stage and thereafter when the vehicle speed is accelerated, the speed stage is shifted up to a speed stage adapted to be automatically held by said first controlling means as time elapses.
Claim 4
Dependent Claim
208 words
An automatic speed changing apparatus for a vehicle including at least an actuating lever for shifting movement of said vehicle from forward movement to rearward movement and vice versa so that when said actuating lever is actuated to either of forward movement and rearward movement, a speed stage of the vehicle is automatically selected to match the movement speed of the vehicle at this time point, said automatic speed changing apparatus comprising; switch means adapted to be actuated independently of the actuating lever, first controlling means for storing and holding control data on the speed stage automatically selected at this time point in response to actuation of said switch means to an ON side and then automatically maintaining the selected speed stage with the use of stored and maintained control data until the switch means is actuated to an OFF side and second controlling means wherein when the actuating lever is shifted to other side while the switch means is shifted to the ON side, the speed stage is first forcibly controlled to a second speed stage and thereafter when the vehicle speed is accelerated, the speed stage is shifted up to a speed stage adapted to be automatically held by said first controlling means as time elapses.
References Cited (Backward Citations)
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