Work vehicle

A technology for working vehicles and inverters, which is applied to vehicle components, hybrid vehicles, forklifts, etc., and can solve problems such as inability to perform driving actions

Inactive Publication Date: 2014-04-16
NIHON KENKI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such a system, since the traveling part is completely electrified, if a part of the system (traveling power supply system) for supplying electric power to the driving source of the traveling part (traveling electric power supply system) breaks down, the Impossible to carry out subsequent driving maneuvers

Method used

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Examples

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Embodiment Construction

[0026] Embodiments of the present invention will be described below using the drawings. figure 1 It is a system configuration diagram of a hybrid wheel loader according to an embodiment of the present invention.

[0027] The wheel loader shown in this figure includes: a working device 50 with a bucket and a landing arm (not shown) and installed in front of the vehicle body; a diesel engine (internal combustion engine) 1; driven by the engine 1 and used to drive hydraulic actuators The hydraulic pump 4 of the mechanism (bucket hydraulic cylinder 51, lifting hydraulic cylinder 52, and steering hydraulic cylinder 53); the control valve 55 for controlling the hydraulic oil supplied from the hydraulic pump 4 to the hydraulic actuators 51, 52, and 53; The power storage device 11 for storing direct current power; the inverter devices 7 and 11 for converting direct current and alternating current; DC bus voltage between 7 and 11) to convert the DCDC converter device 12; through the ...

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PUM

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Abstract

Provided is a work vehicle equipped with: an electrical storage device (11); inverter devices (7, 10); a converter device (12) for converting the voltage of the circuit to which the inverter devices (7, 10) are connected; a generator motor (6) for driving a hydraulic pump (4) with alternating current from the inverter device (7); a motor (9) for driving wheels (61) with alternating current from the inverter device (10); and a control device (200) for controlling the inverter devices (7, 10). In the control device (200), when a malfunction has occurred in a device necessary for supplying current to the motor (9), another process that corresponds to the process that prior to the malfunction was being executed by the device in which the malfunction occurred is executed by another normal device to drive the motor (9). Traveling movement can therefore continue even when a malfunction has occurred in part of the travel power supply system.

Description

technical field [0001] The present invention relates to a hybrid work vehicle having an engine and a power storage device as a power source. Background technique [0002] In recent years, due to environmental issues, rising crude oil prices, etc., the intention to save energy has increased in various industrial products. Previously, this tendency also existed in the field of construction vehicles and work vehicles mainly based on hydraulic drive systems based on diesel engines, and examples of increased efficiency and energy saving achieved by electrification have gradually increased. For example, in the case of electrifying the driving parts of the above-mentioned construction vehicles and work vehicles, that is, using an electric motor (electric motor) as the driving source, in addition to reducing exhaust gas, it is also possible to expect efficient driving of the engine (hybrid model conditions), improvement of power transmission efficiency, recovery of regenerative pow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60K6/46B60W10/00B60W10/06B60W10/08B60W20/00
CPCY02T10/6286B60K6/46B60W20/50Y02T10/6217Y10S903/903B60W2300/121B60K6/52E02F9/2075Y02T10/62B60W10/08
Inventor 金子悟伊君高志森木秀一伊藤德孝守田雄一朗
Owner NIHON KENKI CO LTD
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