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Power gear shifting transmission and control system thereof
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A technology for power shifting and control systems, applied in the direction of transmission control, components with teeth, belts/chains/gears, etc., can solve problems such as difficult to meet requirements, high cost, and self-heavy, and achieve the starting shift process Smooth, automated results
Active Publication Date: 2021-06-01
HANGZHOU ADVANCE GEARBOX GRP
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Problems solved by technology
[0002]Heavy-duty engineering vehicles, such as road rollers, generally have a large dead weight. Combined with their application environment, they have high requirements for gradeability and a wide range of driving torque. Large hydraulic drive systems are often difficult to meet the requirements
[0003]The traditional road roller power transmission device consists of main clutch + power box or power box with torque converter, or di
Method used
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Example Embodiment
[0062]As a preferred embodiment, upstream of the second sub-oil path 202 and the third point of oil passage 203 respectively provided a first throttle valve 220, and a second throttle valve 221, respectively.
[0063]As a preferred embodiment, the output of the oil pump 225 is also provided with a safety valve 224.
[0064]As a preferred embodiment, the downstream of the fourth point of oil 204 is provided with a third throttle valve 222.
[0065]As a preferred embodiment, a cooler 223 is also provided between the main pressure valve 227 of the fourth point of oil 204 and the third throttle 222.
[0066]The above power shifting transmission is preferably used on a roller, based on this, the present embodiment also provides a roller having the power shifting transmission.
[0067]This embodiment also provides a control system for power shifting transmission 1, such asimage 3 As shown, the system includes: controller 3, operating handle 4, sampling unit 5, a gear display unit 6, and a hydraulic cont...
Example Embodiment
[0090]As a preferred embodiment, the first oil pressure P1 ∈ [1 / 4p, 2 / 5p]. When the full pressure is 20bAr, P1 is preferably 6 bar.
[0091]As a preferred embodiment, such asFigure 5 As shown, when the start-shifting demand is flat or flat, the control roller is increased to the control roller to the full pressure, which is 2-3S, which is a gentle boost process, thereby starting or shifting the process. More smooth.
[0092]As a preferred embodiment, such asFigure 6 As shown, when the start-demand is a ramp, the control oil pressure is increased to the full hydraulic pressure, and specifically includes eliminating the gap boosting stage and the fast-binding boost stage, wherein eliminating the gap boosting phase consumption When T2 is 40-100ms, the fast boosting phase consumption T3 is 60-100ms, which is more fast than the flat start process, and the purpose is to quickly combine the corresponding direction clutch tray, the purpose is to make the corresponding The direction of the clutc...
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Abstract
The invention discloses a power gear shifting transmission and a control system thereof. The control system comprises a controller, an operating handle, a sampling unit, a gear display unit and a hydraulic control device; the controller is connected with the operating handle, the sampling unit, the gear display unit and the hydraulic control device; the operating handle is used for sending out a control signal; the sampling unit is used for collecting the current transmission output rotating speed and the vehicle inclination angle; the gear display unit is used for displaying the output direction, gear and diagnosis information of the current transmission; the hydraulic control device comprises a control valve group, a main oil way connected with an oil source and at least three branch oil ways communicating with the main oil way, the control valve group is arranged on the branch oil ways, the control valve group is connected with clutches in the power gear shifting transmission, and the transmission ratio of the transmission is changed by controlling combination and separation of the clutches of all gears. Dynamic adjustment of the transmission torque of a direction clutch is achieved through dynamic control over the combination process of a driving disc and a driven disc of the direction clutch.
Description
technical field [0001] The invention relates to a transmission control system, in particular to a power shift transmission and its control system. Background technique [0002] Heavy-duty engineering vehicles, such as road rollers, generally have a large dead weight. Combined with their application environment, they have high requirements for gradeability and a wide range of travel drive torque. Although a hydraulic drive system with a large speed range is used, it is often difficult to meet the requirements. [0003] The traditional road roller power transmission device consists of main clutch + power box or power box with torque converter, or directly power box with torque converter. Although the required performance requirements are guaranteed, the main clutch needs to be manually operated. Driving The labor intensity of the personnel is high, skilled technology is required to have good performance, and the life of the main clutch is short; although the power box with a t...
Claims
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Application Information
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