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Downhill overspeed prevention control system of hydrostatic loader

A control system and anti-overspeed technology, applied in the direction of control/adjustment system, speed/acceleration control, control device, etc., can solve the problems of vehicle overspeed, vehicle failure, damage, etc., to prevent the vehicle from overspeeding and improve the use of The effect of life and reliability improvement

Pending Publication Date: 2022-07-29
QINGDAO LOVOL EXCAVATOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the driving process of the loader, if it encounters a big slope, the whole machine will slide under the action of the weight of the whole vehicle. If the driver still drives with the maximum accelerator at this time, the whole vehicle will run faster and faster, resulting in the failure of the whole vehicle. Overspeed: For hydrostatic models, overspeeding of the whole vehicle will cause irreversible damage to the pump and motor of the transmission system, and even cause the whole machine to fail, and then cannot work normally

Method used

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  • Downhill overspeed prevention control system of hydrostatic loader
  • Downhill overspeed prevention control system of hydrostatic loader
  • Downhill overspeed prevention control system of hydrostatic loader

Examples

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no. 1 example

[0026] like image 3 As shown, the present invention discloses a hydrostatic loader downhill anti-overspeed control system, including an ECU (engine controller) and a TCU (transmission controller) connected to the CAN bus, and the system is provided with anti-overspeed protection functions, such as figure 1 As shown in the figure, the ECU collects the engine speed and interacts with the TCU. The TCU collects the vehicle speed and gear position of the whole machine. The TCU decides whether to run the deceleration protection according to the written overspeed protection strategy:

[0027] Speed ​​down protection operating conditions:

[0028] (1) The gear of the whole machine is in high gear;

[0029] (2) The engine speed is greater than the limit value n min ;

[0030] (3) The vehicle speed of the whole machine is greater than the initial value V of deceleration min , V min Greater than the maximum engine speed n when the whole machine is working on the ground max corresp...

no. 2 example

[0040] like figure 2 As shown, on the basis of the above-mentioned first embodiment, the overspeed protection strategy also includes: before the TCU diagnoses the operating conditions, the system first detects whether the overspeed protection function is normally turned on, and if it has been turned on, the TCU starts to diagnose the operating conditions with the work of the whole machine. , if it is not turned on, the TCU will send the alarm message of the overspeed protection function not normally turned on to the instrument "overspeed protection function is not normally turned on, whether to continue the operation", if the operation is urgently needed, you can select "Yes" on the key panel to temporarily enable the engine Run at the normal working speed. If time allows for maintenance or maintenance is necessary, select "No" on the key panel, and then stop for maintenance.

[0041] It is worth noting that the anti-overspeed control system involved in the present invention ...

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Abstract

The invention relates to the technical field of anti-overspeed control of loaders, in particular to a downhill anti-overspeed control system of a hydrostatic loader. The system comprises an ECU and a TCU. An anti-overspeed protection function is set in the system, the ECU collects the rotating speed of an engine and interacts with the TCU, the TCU collects the speed of the whole machine and the gear of the whole machine, and the TCU decides whether to operate speed reduction protection or not according to a written-in overspeed protection strategy: according to the operation condition of speed reduction protection, the gear of the whole machine is at the high gear; the rotating speed of the engine is greater than a limit value nmin; the speed of the whole machine is larger than the speed reduction initial value Vmin, and Vmin is larger than the speed corresponding to the maximum rotating speed nmax of the engine when the whole machine works on the flat ground. And when all the three operation conditions are met, the TCU operates speed reduction protection to enable the ECU to control the engine to reduce the speed so as to carry out overspeed protection on the whole machine. In the overspeed protection strategy, a speed reduction end value Vmax when the vehicle speed is larger than Vmin is further set, and after the TCU operates speed reduction protection to enable the speed of the engine to be reduced, the ECU controls the rotating speed of the engine to be nmin before the vehicle speed is increased to Vmax.

Description

technical field [0001] The invention relates to the technical field of loader anti-overspeed control, in particular to a hydrostatic loader downhill anti-overspeed control system. Background technique [0002] During the driving process of the loader, if it encounters a steep downhill situation, the whole vehicle will slide down under the action of the vehicle's own weight. If the driver is still driving at the maximum accelerator at this time, the whole vehicle will run faster and faster, resulting in the whole vehicle. Overspeeding: For hydrostatic models, overspeeding of the entire vehicle will cause irreversible damage to the pump and motor of the transmission system, and even cause the entire machine to fail, and thus fail to work properly. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a kind of anti-overspeed control for hydrostatic loader downhill, which can effectively prevent the overspeed of the whole machine when the loader...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60K31/00
CPCB60K31/00
Inventor 代志龙蒙小行孙长良张智胜黄勇超胡志斌于善祥
Owner QINGDAO LOVOL EXCAVATOR
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