Bulldozer torque converter locking and unlocking control method and device
A technology for torque converters and bulldozers, which is applied in transmission devices, fluid transmission devices, mechanical equipment, etc., to achieve the effect of accurate engine speed and reduced manufacturing costs
Active Publication Date: 2016-11-16
SHANTUI CONSTR MASCH CO LTD
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Problems solved by technology
[0005] The purpose of the present invention is to propose a method for closing and unlocking the torque converter of a bulldozer, which can solve the problem in the prior art that the existing structure of the torque converter of the bulldozer needs to install a sensor to realize the closing and unlocking of the torque converter
[0006] The purpose of the present invention is also to provide a bulldozer torque converter closing and unlocking control device, which can solve the problem in the prior art that the existing structure of the bulldozer torque converter needs to install sensors to realize the torque converter closing and unlocking
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Embodiment 2
[0045] This embodiment provides a torque converter state control device, using the method as described in Embodiment 1 to control the state of the torque converter, which includes:
[0046] The locked state turbine data acquisition module acquires the first correspondence data between the turbine speed and the turbine output torque when the torque converter is in the locked state;
[0047] An unlocked state turbine data acquisition module, configured to acquire the second correspondence data between the turbine speed and the turbine output torque of the torque converter in the unlocked state;
[0048] A critical turbine speed search module, configured to search for the turbine speed at the overlapping point corresponding to the overlapping point in the first correspondence data and the second correspondence data;
[0049] The critical engine speed acquisition module is used to calculate the critical engine speed corresponding to the turbine speed at the intersection point acco...
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The invention relates to a bulldozer torque converter locking and unlocking control method which comprises the following steps: acquiring first corresponding relation data between a turbine speed and a turbine output torque of a torque converter at a locked state; acquiring second corresponding relation data between the turbine speed and the turbine output torque of a torque converter at an unlocked state; searching an overlapping point turbine speed corresponding to an overlapping point in the first corresponding relation data and the second corresponding relation data; calculating a critical engine speed corresponding to the overlapping point turbine speed according to preset corresponding relation data between the turbine speed and the engine speed; and monitoring locking and unlocking of the engine speed torque converter. According to the bulldozer torque converter locking and unlocking control method, the detection of the turbine speed under a locked condition of the torque converter is converted into detection of the engine speed, so that whether the torque converter is needed to be locked or not can be judged according to the change of the engine speed. As the existing engine speed detection technology is relatively mature, the acquired engine speed is relatively accurate, and the manufacturing cost of a bulldozer can be further reduced.
Description
technical field [0001] The invention relates to the technical field of bulldozers, in particular to a method and device for closing and unlocking a torque converter of a bulldozer. Background technique [0002] The load of the bulldozer is variable. When the load is heavy, the torque converter is required to output as much torque as possible. When the load is light, the torque converter is required to output a relatively high speed. Therefore, the torque converter with lock-up function is the best choice to meet complex functions and save energy. [0003] Usually, it is necessary to detect the torque converter turbine speed to determine whether the torque converter needs to be locked, so a corresponding speed sensor must be equipped. However, the limitations of the existing structure of the bulldozer torque converter have caused difficulties in the installation of the sensor. [0004] Therefore, how to propose a torque converter locking and unlocking method, which can solv...
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IPC IPC(8): F16H41/24E02F3/84
CPCE02F3/84F16H41/24
Inventor 姜友山刘春朝金轲赵建军
Owner SHANTUI CONSTR MASCH CO LTD