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Automatic wheel loader hydraulic torque converter control methods

A hydraulic torque converter and automatic wheel-blocking technology, which is applied in transmission control, mechanical equipment, belts/chains/gears, etc., can solve the problem of lock-up control of hydraulic torque converters of wheel loaders, different , operation objects and power flow distribution are complicated and changeable, so as to achieve the effects of low cost, preventing misoperation and reducing longitudinal impact

Active Publication Date: 2016-12-07
XIAMEN UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, wheel loaders have the characteristics of complex and changeable working conditions, tasks, operating objects and power flow distribution, which are significantly different from the working conditions of automobiles.
In addition, no patent documents on lock-up control for wheel loader hydraulic torque converters have been retrieved so far.

Method used

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  • Automatic wheel loader hydraulic torque converter control methods

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Embodiment Construction

[0026] The following embodiments will describe the present invention in detail with reference to the accompanying drawings.

[0027] Such as figure 1 As shown, the parts and components of the power transmission system of the automatic transmission wheel loader on which the control method of the present invention relies include a complete machine controller 1, an engine 2, an engine control unit 3, a hydraulic torque converter 4, an automatic transmission 5, a transmission Control unit 6 and CAN bus 7. The engine 2, the torque converter 4, and the automatic transmission 5 are connected in sequence; the complete machine controller 1, the engine control unit 3, and the transmission empty unit 6 are respectively connected in parallel on the CAN bus 7, wherein the complete machine controller 1 uses The engine control unit 3 is used to control the engine 2 and the transmission control unit 6 is used to control the torque converter 4 and the automatic transmission 5 .

[0028] The ...

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Abstract

The invention discloses automatic wheel loader hydraulic torque converter control methods, and relates to wheel loader drive system control. A locking control method comprises the steps of (1) having control over the initial state; (2) judging the spading intention of a driver; (3) judging the non-flameout conditions of an engine; (4) judging the feasibility conditions of rotating speed initiative synchronization; (5) judging locking conditions; and (6) transmitting the locking instruction. A non-locking control method comprises the steps of (1) having control over the initial state; (2) prejudging the working conditions of a loader on the next moment; (3) judging the spading intention of a driver and the non-flameout conditions of an engine; and (4) transmitting the non-locking instruction. According to the automatic wheel loader hydraulic torque converter control methods, all the control parameters come from the CAN bus of the loader, hydraulic torque converter locking control can be achieved just by writing a control program in a complete machine controller, no parts are added, and the cost is low; it can be avoided that an engine flames out because of overload in the locking process; longitudinal impact of a complete machine in locking can be reduced, and the comfort of the complete machine is guaranteed; and the misoperation of a driver can be prevented, and it is guaranteed that the loader travels normally.

Description

technical field [0001] The invention relates to the transmission system control of a wheel loader, in particular to a control method for a hydraulic torque converter of an automatic gear wheel loader. Background technique [0002] The locking control of the hydraulic torque converter of the current wheel loader is mainly based on the locking control law of the automotive torque converter. Chinese patent ZL200710135387.1 discloses a locking control method for a torque converter of a steel-belt continuously variable transmission, which uses parameters such as accelerator pedal opening and vehicle speed as the locking conditions of the torque converter. However, wheel loaders have the characteristics of complex and changeable working conditions, tasks, operating objects and power flow distribution, which are significantly different from the working conditions of automobiles. In addition, no patent literature on locking control of a hydraulic torque converter of a wheel loader ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/48F16H61/18
CPCF16H61/18F16H61/48
Inventor 郭景华
Owner XIAMEN UNIV
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