Working vehicle control apparatus
A technology for control devices and working vehicles, which is applied in the direction of engine control, transmission control, and components with teeth, etc., and can solve the problems of reduced lifting force of the boom and deterioration of workability, etc.
Active Publication Date: 2015-02-25
NIHON KENKI CO LTD
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- Description
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Problems solved by technology
[0004] However, for example, in the case of excavation work with a wheel loader, if the driving force is large, the reaction force acting on the boom when the bucket is dug into the mound becomes large, and the lifting force of the boom decreases. May be accompanied by deterioration in workability
Method used
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Embodiment Construction
[0022] Below, refer to Figure 1 to Figure 13 A control device for a work vehicle according to an embodiment of the present invention will be described.
[0023] figure 1 It is a side view of a wheel loader which is an example of a work vehicle to which the control device according to the embodiment of the present invention is applied. The wheel loader 100 is composed of a front body 110 having an arm 111 , a bucket 112 , tires 113 and the like, and a rear body 120 having a cab 121 , an engine compartment 122 , tires 123 and the like. The arm 111 is rotated vertically (pitch motion) by the drive of the arm cylinder 114 , and the bucket 112 is rotated vertically by the drive of the bucket cylinder 115 (unloading or loading). The front body 110 and the rear body 120 are rotatably connected to each other by a center pin 101 , and the front body 110 is bent left and right relative to the rear body 120 by expansion and contraction of a steering cylinder (not shown).
[0024] f...
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A working vehicle control apparatus includes: a selection device that selects one of a power mode and an economy mode; a determination device that determines whether or not a speed restriction condition in which a speed ratio detected by the speed ratio detection device is equal to or less than a predetermined value and a load pressure detected by the load pressure detection device is equal to or greater than a predetermined value has been established; an engine rotational speed restriction device that restricts a maximum rotational speed of the motor upon selection of the economy mode to a lower speed side than a maximum rotational speed of the motor upon selection of the power mode when it is determined by the determination that the speed restriction condition has been established; and a vehicle speed restriction device that restricts a maximum vehicle speed upon selection of the economy mode to a lower speed side than a maximum vehicle speed upon selection of the power mode when it is determined by the determination device that a speed restriction condition has not been established.
Description
technical field [0001] The present invention relates to a control device for a work vehicle such as a wheel loader. Background technique [0002] Conventionally, there is known a wheel loader in which a work actuator is operated by discharging oil from a hydraulic pump driven by an engine, and the output of the engine is used as driving force for travel via a torque converter and a transmission. Such a wheel loader includes a wheel loader in which an engine output torque characteristic is changed according to mode selection of an workload mode and a fuel-saving mode (see Patent Document 1). In the device described in this patent document 1, when the fuel-saving mode is selected, the engine output torque in the high rotation range is set smaller than when the workload mode is selected, and the maximum pump absorption is set accordingly. The torque is set smaller. As a result, a large traveling driving force can be obtained even in the fuel-saving mode. [0003] Patent Docu...
Claims
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IPC IPC(8): F02D29/02F02D29/00F16H61/02F16H59/44F16H59/46
CPCY10T477/68F02D29/02F16H2059/085E02F9/2296Y10T477/6403E02F9/20Y10T477/6333F16H2059/467Y10T477/79Y10T477/636F16H2059/084E02F9/2079E02F9/2246E02F9/2253F16H59/44F16H61/02
Inventor 兵藤幸次中园裕喜大内裕史岛津淳志
Owner NIHON KENKI CO LTD