DRIVE CONTROL DEVICE FOR WORKING VEHICLE
First Claim
1. A drive control device used for a working vehicle including an engine, an electric power generator driven by the engine, a hydraulic pump driven by the engine and serving as a driving source for a hydraulic working implement provided on a front section of the vehicle, a first traveling drive device for transmitting motive power of the engine to a driving wheel via a torque converter and a transmission so as to make the vehicle travel, and a second traveling drive device for driving an electric motor by means of the generator-output electrical energy and then transmitting motive power of the motor to the driving wheel so as to make the vehicle travel, the drive control device comprising:
- driving-force switching means for switching a driving force between the first traveling drive device and the second traveling drive device,wherein the driving-force switching means includes a traveling means switcher for selecting, depending upon a traveling speed of the vehicle, one of the two traveling drive devices so as to make the vehicle travel while being driven in a high-speed region with the first traveling drive device and in a low-speed region with the second traveling drive device.
1 Assignment
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Accused Products
Abstract
Provided is a drive control device for a working vehicle, this device controlling motive power to be virtually invariant, even during switching of traveling drive devices, and having high-efficiency characteristics.
The working vehicle has a first traveling drive device 12 including an engine 1, an electric power generator 2, a hydraulic pump 11, a torque converter 5, and a transmission 6, and a second traveling drive device 13 for driving an electric motor 8 to make the vehicle travel. Driving-force switching means 20A2 switches the first traveling drive device 12 and the second traveling drive device 13. A traveling means switcher 20A2 selects one of the two traveling drive devices, depending upon a traveling speed of the vehicle, so as to make the vehicle travel while being driven in a high-speed region with the first traveling drive device and in a low-speed region with the second traveling drive device.
12 Citations
7 Claims
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1. A drive control device used for a working vehicle including an engine, an electric power generator driven by the engine, a hydraulic pump driven by the engine and serving as a driving source for a hydraulic working implement provided on a front section of the vehicle, a first traveling drive device for transmitting motive power of the engine to a driving wheel via a torque converter and a transmission so as to make the vehicle travel, and a second traveling drive device for driving an electric motor by means of the generator-output electrical energy and then transmitting motive power of the motor to the driving wheel so as to make the vehicle travel, the drive control device comprising:
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driving-force switching means for switching a driving force between the first traveling drive device and the second traveling drive device, wherein the driving-force switching means includes a traveling means switcher for selecting, depending upon a traveling speed of the vehicle, one of the two traveling drive devices so as to make the vehicle travel while being driven in a high-speed region with the first traveling drive device and in a low-speed region with the second traveling drive device. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification