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A Control Method of High Power Hydraulic Retarder

A hydraulic retarder and control method technology, applied in the direction of liquid resistance brakes, transmission control, brakes, etc., can solve the problems of car crashes, single hydraulic retarders, and shortened service life of engines, and achieve guaranteed The effects of safety, loss recovery, and damage avoidance

Active Publication Date: 2022-03-29
贵州凯星液力传动机械有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, this control method does not provide continuous overspeed protection for the engine, and the risk of shortening the service life of the engine due to continuous overspeed is high; secondly, in emergency and special situations, the hydraulic retarder cannot be opened quickly to avoid car crashes Finally, it is only a single threshold to judge whether the oil temperature of the hydraulic retarder itself is overheated, which is not very practical for dynamic running vehicles

Method used

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  • A Control Method of High Power Hydraulic Retarder
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  • A Control Method of High Power Hydraulic Retarder

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Embodiment Construction

[0037] The technical solution of the present invention is further described below, but the scope of protection is not limited to the description.

[0038] Such as Figure 1 to Figure 3 As shown, a control method of a high-power hydraulic retarder according to the present invention includes the following steps:

[0039] (1) The controller judges whether the emergency switch signal of the retarder is valid. If it is valid, the retarder is fully opened and ends, and enters the next cycle. If it is invalid, it directly enters the next step;

[0040] (2) The controller decides whether to open the retarder according to the engine speed. If the retarder is opened, it will directly enter the next step. Otherwise, it will try to open the retarder according to whether it receives the hard line of the retarder gear handle or the CAN switch signal. , to decide whether to open the retarder, if one of the signals is received to try to open the retarder, then go directly to the next step, o...

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Abstract

The invention discloses a control method of a high-power hydraulic retarder, which belongs to the technical field of automobile braking equipment. The method includes the following steps: the controller judges whether the emergency switch signal of the retarder is valid; the controller decides whether to open the retarder according to the engine speed, and then tries to open the retarder according to whether the hard line of the retarder gear handle or the CAN switch signal is received; The controller further judges whether the retarder opening condition is satisfied; the controller opens the subroutine, and gives the initial current of the corresponding retarder solenoid valve according to the input conditions when the retarder is tried to open; The oil temperature of the gearbox is high or low, the torque and gear position of the control gearbox, and the braking torque of the retarder; when finished, continue to repeat steps (1) to (5). It can recover losses and maximize the safety of vehicles and passengers; avoid engine damage caused by continuous overspeed; avoid retarder damage due to high temperature.

Description

technical field [0001] The invention relates to a control method of a high-power hydraulic retarder, which belongs to the technical field of automobile brake equipment. Background technique [0002] Hydraulic retarder is an auxiliary braking device for automobiles, mainly used in large passenger cars, urban public transport vehicles and heavy trucks. The device is installed between the car transmission shaft and the gearbox. The rotor drives the hydraulic rotation and impacts the stator. At this time, the stator will also generate a reaction force to act on the rotor through the hydraulic force, thereby hindering the rotation of the rotor and realizing non-contact braking. High-power hydraulic retarders are usually set with 4 gears: 100%, 75%, 50% and 25%. Different gears control the current through different retarder solenoid valves, and the driver can choose the required gear according to the specific situation. stalls. [0003] The Chinese patent document with the publi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D57/00F16D57/02F16H59/72F16H61/02B60T10/00
CPCF16D57/00F16D57/02F16H59/72F16H61/0213B60T10/00
Inventor 陆应骅谢嘉廖安强田世杰
Owner 贵州凯星液力传动机械有限公司
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