Method, device and system for controlling hydrostatic power transmission system

A technology of power transmission system and control device, which is applied in the direction of control device, non-electric variable control, control/regulation system, etc., can solve the problem of unsatisfactory fuel consumption saving, and achieve the effect of saving fuel consumption and ensuring matching degree

Active Publication Date: 2012-12-19
SANY HEAVY IND CO LTD (CN)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of this, the present invention proposes a control method, device and system for a hydrostatic power transmission system to solve the problem of unsatisfactory fuel consumption caused by manual operation of the accelerator pedal in the prior art

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  • Method, device and system for controlling hydrostatic power transmission system
  • Method, device and system for controlling hydrostatic power transmission system
  • Method, device and system for controlling hydrostatic power transmission system

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Embodiment Construction

[0030] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0031] The basic idea of ​​the present invention is: the machine operator only needs to input the required vehicle speed signal, and the setting of other parameters (such as engine speed, hydraulic pump displacement, hydraulic motor displacement, gearbox gear, etc.) The system automatically completes and executes according to the principle of the lowest fuel consumption. Specifically: after obtaining the speed of the hydraulic motor and the pressure of the hydraulic motor through the sensor, the load power and the minimum speed of the engine are obtained; and then the required displacement of the hydraulic pump and the required displacement of the hydraulic motor are calculated. Then the operati...

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Abstract

The invention discloses a method, a device and a system for controlling a hydrostatic power transmission system. The device for controlling the hydrostatic power transmission system comprises a minimum rotational speed acquisition module, an engine rotational speed control mechanism and a control quantity acquisition module. An engine rotational speed calculating mechanism in the minimum rotational speed acquisition module acquires load power according to data acquired by a motor rotational speed sensor and a hydraulic motor pressure sensor, and then acquires the minimum rotational speed of an engine according to the load power. The engine rotational speed control mechanism controls rotational speed of the engine according to the minimum rotational speed. A displacement calculating mechanism in the control quantity acquisition module acquires required displacement of a hydraulic pump and required displacement of a hydraulic motor according to the minimum rotational speed and an input value of an equipment running speed input mechanism, and a hydraulic pump control mechanism and a hydraulic motor control mechanism control displacements of the hydraulic pump and the hydraulic motor according to the required displacement of the hydraulic pump and the required displacement of the hydraulic motor. Once the speed required for running equipment is input by operators, the device can automatically control the engine to run at the minimum rotational speed and realize matching of the displacements of the hydraulic pump and the hydraulic motor.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a control method, device and system for a hydrostatic power transmission system. Background technique [0002] Traction-type construction machinery using a hydrostatic power transmission system is generally divided into two power transmission methods, one of which is powered by the engine to drive the hydraulic pump. After the hydraulic pump drives the hydraulic motor, the hydraulic motor transmits the driving force to the hydraulic motor through the mechanical transmission device. drive wheel. Another power transmission method provides power for the engine to drive the hydraulic pump. After the hydraulic pump drives the hydraulic motor, the speed of the hydraulic motor is changed through the gearbox, and then the mechanical transmission device transmits the driving force to the driving wheels. [0003] In the prior art, no matter which of the above two power transmission mo...

Claims

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Application Information

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IPC IPC(8): B60K31/00
Inventor 易小刚林涛
Owner SANY HEAVY IND CO LTD (CN)
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