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A technology for controllers and bulldozers, applied in the direction of transmission control, clutches, mechanical equipment, etc., can solve problems that affect the comfort of driving bulldozers, large shift shocks and pressure fluctuations, and reduce the service life of gearboxes in the transmission system. Achieve the effects of reducing shifting impact, improving overall life, and improving comfort
Active Publication Date: 2020-06-12
SHANTUI CONSTR MASCH CO LTD
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Problems solved by technology
Therefore, under complex working conditions, if the shift curve of the gearbox is used for the whole process of shift adjustment, it is easy to have a large shift shock and pressure fluctuation, which will seriously affect the comfort of driving the bulldozer, and will also reduce the transmission system. Gearbox service life
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Embodiment 1
[0024] This embodiment proposes a bulldozer shift controller, figure 1 It is a kind of controller shift control flowchart in embodiment one, refer to figure 1 , shift control includes:
[0025] S1. Collect the oil temperature data in the clutch oil chamber and the first rotational speed data of the engine, and determine the first controlled value according to the oil temperature data and the first rotational speed data.
[0026] In this embodiment, the controller is used to generate a control command for the proportional solenoid valve disposed on the clutch, and the first controlled value is a target current value for controlling the proportional solenoid valve.
[0027] In the transmission system, the influencing factors related to the shifting quality include the transmission input speed, output speed, clutch oil chamber oil temperature, viscosity, pressure, clutch torque, torque converter pump pressure, transmission oil inlet pressure, etc. . In this embodiment, in orde...
Embodiment 2
[0044] This embodiment proposes a bulldozer shift system, figure 2 It is the structural block diagram of the control system in the second embodiment, refer to figure 2 , the shift system includes a shift controller 1 , a shift operation unit 2 , a torque converter 3 , a gearbox 4 , a temperature sensor 9 , a first rotational speed sensor 6 and a second rotational speed sensor 7 . Wherein, the gearbox 4 is equipped with a proportional solenoid valve, and the proportional solenoid valve is used to adjust the flow of hydraulic oil entering the clutch according to the shift control instruction.
[0045] The shift controller 1 is used to generate a shift control instruction for controlling the gearbox 4 according to the first controlled quantity and the second controlled quantity. The shift operation unit 2 is electrically connected with the shift controller 1 for sending a shift request instruction, and the engine 11 is connected with the gearbox 4 through the torque converter ...
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Abstract
The invention discloses a bulldozer gear-shifting controller and a system. The gear-shifting controller is used for acquiring oil temperature data in a clutch oil cavity and first rotate speed data ofan engine so as to determine a first controlled volume value according to the oil temperature data and the first rotate speed data; acquiring first rotate speed data and second rotate speed data of aturbine output end in a torque converter so as to determine a second controlled volume value according to the first rotate speed data and the second rotate speed data; and generating a gear-shiftingcontrol command according to the first controlled volume value and the second controlled volume value. According to the gear-shifting controller, a target current value aiming at the control of a proportional electromagnetic value is determined by adopting the rotate speed of the engine and oil temperature data, a load of a bulldozer is determined based on the speed ratio of the rotate speed of the engine and the rotate speed of a torque converter turbine, and the engagement speed of a clutch is further determined, so that the bulldozer can carry out variable-speed adjustment under the full temperature range and the full rotate speed range, the gear-shifting impact of a gearbox can be effectively reduced, the service life of the gearbox is prolonged, and the comfort of drivers and passengers are improved.
Description
technical field [0001] Embodiments of the present invention relate to engineering machinery technology, and in particular to a bulldozer shift controller and system. Background technique [0002] The transmission system is an important part of the bulldozer, and the shifting quality of the transmission system directly affects the handling performance of the bulldozer. [0003] In the prior art, the shift control of the bulldozer during the shifting process is usually based on the transmission shift curve, and the transmission shift curve is usually only calibrated according to a single standard working condition. When the oil temperature is 75 degrees Celsius, the engine speed is at the rated power of 1500rpm, and the gear shifting curve of the gearbox is systematically calibrated, so that in this state, the shifting action is smooth and the impact is minimal. Therefore, under complex working conditions, if the shift curve of the gearbox is used for the whole process of shi...
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