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Lock-up clutch control method for engine exhaust braking

A technology of locking clutch and exhaust braking, applied in engine control, clutch, machine/engine, etc., can solve problems such as hidden safety hazards, reduce braking effect, etc., to improve safety, prevent work instability, and improve exhaust. The effect of the deceleration braking effect

Inactive Publication Date: 2018-03-20
贵州凯星液力传动机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in practice, it is very likely that the engine speed is lower than the locking speed when the exhaust brake is required to decelerate, which will greatly reduce the braking effect and cause a great safety hazard

Method used

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  • Lock-up clutch control method for engine exhaust braking
  • Lock-up clutch control method for engine exhaust braking

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Embodiment Construction

[0021] The technical solution of the present invention is further described below, but the scope of protection is not limited to the description.

[0022] Such as figure 1 and figure 2 As shown, a control method for an engine exhaust brake lock-up clutch includes the following steps:

[0023] (1) The variable speed controller obtains the throttle and engine working information;

[0024] (2) judge whether the degree of opening of the throttle is 0, if the degree of opening of the throttle is 0, then enter the next step;

[0025] (3) Judging whether the engine exhaust brake switch is closed, if the engine exhaust brake switch is closed, enter the next step;

[0026] (4) Judging whether the difference between the engine speed and the minimum stable engine speed is greater than a set value, if the engine speed is greater than the set value, enter the next step;

[0027] (5) The transmission controller sends a closing command to the lock-up clutch, and the lock-up clutch is lo...

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PUM

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Abstract

The invention discloses a transmission control method based on engine exhaust braking. The method is characterized in that when opening degree of a vehicle accelerator is zero, the switch for engine exhaust braking is turned off and the engine rotating speed is larger than a certain set value, the lock-up clutch is turned off. By implementing the control method, the transmission lock-up clutch ofthe engine can be in a locked state when exhaust braking and speed reduction are required, and due to the fact that the rotating speed of the engine is detected, the engine working instability causedby flameout caused by too low rotating speed of the engine can be prevented; the good exhaust, deceleration and braking effects are provided; under the control method, braking can be carried out according to actual running conditions of the vehicle, and braking can be carried out not only when the transmission meets the conventional locking condition, so that the safety of driving the engineeringvehicle on the road is improved.

Description

technical field [0001] The invention relates to a control method for an engine exhaust brake lock-up clutch. Background technique [0002] At present, when the construction vehicle is on a long downhill, the driver generally releases the accelerator to implement engine exhaust braking. The engine exhaust brake will be invalid, that is, the engine exhaust brake can only be effective when the engine speed exceeds its minimum idle speed and the throttle is zero, but the braking deceleration effect depends on whether the transmission lock-up clutch works, when the lock-up clutch does not When working, the exhaust of the engine basically does not have a deceleration effect on the vehicle speed, and only the combination of the lock-up clutch can produce a greater braking deceleration effect. In general vehicle transmissions, the operation of the transmission lock-up clutch is mostly controlled according to the engine speed. When the engine speed is greater than a certain threshol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D9/06F16D48/06F16H61/14
CPCF02D9/06F16D48/064F16H61/143
Inventor 刘小红
Owner 贵州凯星液力传动机械有限公司
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