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Control system for hybrid construction machinery

A technology for control systems and construction machinery, used in fluid pressure actuation system components, mechanical equipment, earth movers/shovels, etc.

Inactive Publication Date: 2015-07-29
KYB CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the conventional control system, since the clutch is provided separately in the engine system and the regenerative hydraulic motor system, the size of the device must be increased.

Method used

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  • Control system for hybrid construction machinery
  • Control system for hybrid construction machinery
  • Control system for hybrid construction machinery

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0014] figure 1 The shown first embodiment has a first main pump MP1 and a second main pump MP2 as variable displacement pumps, the first main pump MP1 is connected to the first circuit system, and the second main pump MP2 is connected to the second circuit system. connect.

[0015] The first circuit system connected to the first main pump MP1 is connected in order from its upstream side: an operation valve 1 for controlling a swing motor; an operation valve 2 for controlling an arm cylinder; The operation valve 3 for second gear is used to control a boom cylinder BC; the operation valve 4 is used to control a backup accessory; and the operation valve 5 is used to control a motor for left travel.

[0016] The respective operation valves 1 to 5 are connected to the first main pump MP1 via the neutral flow path 6 and the parallel path 7 , respectively.

[0017] A throttle valve 8 for pilot pressure control for generating a pilot pressure is provided downstream of the operation...

no. 2 Embodiment approach

[0077] figure 2 In the second embodiment shown, the engine E, the first main pump MP1, the second main pump MP2, the clutch 44, the motor generator GM, the auxiliary pump AP and the regenerative hydraulic motor M are all linked on the same shaft, and the first step can be omitted. The transmission mechanism 43 in the embodiment. Other configurations other than the above configurations are the same as those of the first embodiment.

no. 3 Embodiment approach

[0079] image 3 The illustrated third embodiment differs from the first embodiment in the arrangement of the assist pump AP, the regenerative hydraulic motor M, and the motor generator GM, and the other configurations are the same as those of the first embodiment.

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Abstract

A control system for hybrid construction machine includes an engine, a main pump to be driven by the engine, a rotary shaft linking an assist pump, a regenerative hydraulic motor and a motor generator, and a clutch for linking the engine and the rotary shaft.

Description

technical field [0001] The present invention relates to a control system for a hybrid construction machine that rotates a generator using an output from an engine or a regenerative hydraulic motor and drives an auxiliary pump using the rotational force of the generator. Background technique [0002] Japanese JP2006-336845A discloses a hybrid construction machine, which links the engine and the rotating shaft of the main pump through a clutch, and transmits the rotating force of the rotating shaft to the motor generator through a power transmission device. [0003] The motor-generator is connected via a clutch to a regenerative hydraulic motor in a separate system from the engine. Therefore, the motor generator can perform a power generation function using either the output of the engine or the output of the regenerative hydraulic motor. [0004] In the conventional control system, since clutches are separately provided in the engine system and the regenerative hydraulic mot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02F9/20E02F9/22F15B11/00F15B21/14
CPCE02F9/2285E02F9/2075E02F9/2235E02F9/2079E02F9/2217E02F9/2296E02F9/2292E02F9/2282E02F9/2242E02F9/20E02F9/22F15B11/00F15B21/14
Inventor 川崎治彦江川祐弘
Owner KYB CORP