Locking and unlocking device of crawler-type engineering machinery hydraulic torque converter and control method thereof

Abstract

The invention discloses a locking and unlocking device of a crawler-type engineering machinery hydraulic torque converter and a control method thereof. The locking and unlocking control parameters are the turbine revolution, gear shift signals and accelerator signals; the device comprises a turbine revolution speed sensor, a gear shift signal sensor, an accelerator signal sensor, a locking and unlocking mode selection switch, a micro computer controller, a brake signal sensor, a driving power supply and an electrohydraulic locking and unlocking device; the locking and unlocking mode selection switch, the turbine revolution speed sensor, the gear shift signal sensor, the accelerator signal sensor and other units collect data; the data are input in the micro computer controller; and the micro computer controller processes the input information, and outputs the information to the electrohydraulic locking and unlocking device, thus the locking and unlocking operations of the hydraulic torque converter are realized. Because three parameters are adopted to act as the locking and unlocking control parameters, the motive power performance and the economical efficiency are compatible, and the working efficiency and the comprehensive using performance of the engineering machinery hydraulic torque converter are improved obviously. The device provided by the invention has a simple structure, is convenient to operate and use, and has good stability and high reliability.

Description

technical field [0001] The invention relates to an auxiliary device of construction machinery and a control method thereof, in particular to a locking and unlocking device of a hydraulic torque converter of a crawler type construction machinery and a control method thereof. Background technique [0002] The application of hydraulic torque converter on engineering vehicles greatly simplifies the handling of the vehicle, making it start smoothly and accelerate quickly; at the same time, the transmission of power through liquid can reduce the dynamic load and vibration of the transmission system and prolong the service life of the transmission system , Improve vehicle driving safety and passability. However, the transmission efficiency of the torque converter is low, especially in the case of high speed ratio, the efficiency drops sharply, and the fuel consumption and emission pollution increase obviously. These shortcomings restrict the application and development of the torqu...

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Problems solved by technology

However, because this method realizes slip transmission in a large range, it is easy to generate too much heat, and it has high requirements on the sealing of the system, which increases the difficulty and cost of parts processing technology, and the control system is relatively complicated. The annual production volume is only It is not very economical for crawler-type construction machinery such as about 10,000 bulldozers

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