阅读说明：本技术 一种自动激活辅助制动的控制方法、装置、设备及存储介质 (Control method, device and equipment for automatically activating auxiliary brake and storage medium ) 是由 杨新达 武玉臣 于 2020-03-31 设计创作，主要内容包括：本发明公开了一种自动激活辅助制动的控制方法,包括：锁定发动机进入倒拖工况时的转速；根据发动机进入倒拖工况时的转速获取发动机的第一转速阈值；计算发动机的转速上升速率,当所述上升速率大于预设上升速率阈值时,修正所述第一转速阈值,得到修正后的第二转速阈值；当发动机的转速大于所述第二转速阈值时,激活辅助制动。通过上述方法,可以优化现有的自动激活辅助制动的策略,使发动机根据超速的情况,更合理的激活辅助制动,提高发动机的可靠性,降低故障率。(The invention discloses a control method for automatically activating auxiliary brake, which comprises the following steps: locking the rotating speed of the engine when the engine enters a back-dragging working condition; acquiring a first rotating speed threshold value of the engine according to the rotating speed of the engine under the condition of the back-dragging; calculating the speed rising rate of the engine, and correcting the first speed threshold value when the rising rate is larger than a preset rising rate threshold value to obtain a corrected second speed threshold value; activating auxiliary braking when the speed of the engine is greater than the second speed threshold. By the method, the conventional strategy for automatically activating the auxiliary brake can be optimized, so that the auxiliary brake can be more reasonably activated according to the overspeed condition of the engine, the reliability of the engine is improved, and the failure rate is reduced.)

1. A control method for automatically activating auxiliary braking, comprising:

locking the rotating speed of the engine when the engine enters a back-dragging working condition;

acquiring a first rotating speed threshold value of the engine according to the rotating speed of the engine under the condition of the back-dragging;

calculating the speed rising rate of the engine, and correcting the first speed threshold value when the rising rate is larger than a preset rising rate threshold value to obtain a corrected second speed threshold value;

activating auxiliary braking when the speed of the engine is greater than the second speed threshold.

2. The method of claim 1, wherein prior to locking the engine speed when entering the tow-back condition, further comprising:

and judging that the engine enters a back-dragging working condition.

3. The method of claim 1, wherein said calculating a rate of increase of engine speed, and modifying said first threshold speed value when said rate of increase is greater than a preset rate of increase threshold value comprises:

and calculating the rising rates of three continuous steps of the engine speed, and correcting the first speed threshold when the rising rates of the three continuous steps are all larger than a preset rising rate threshold.

4. The method of claim 3, wherein the modifying the first speed threshold comprises:

calculating the average value of the rising rates of the continuous three steps;

correcting the first speed threshold based on the average.

5. The method of claim 1, wherein when the rate of rise is less than a preset rate of rise threshold, further comprising:

judging whether the rotating speed of the engine is greater than the first rotating speed threshold value or not;

when the rotation speed of the engine is greater than the first rotation speed threshold value, auxiliary braking is activated.

6. A control device for automatically activating auxiliary braking, comprising:

the locking module is used for locking the rotating speed of the engine when the engine enters a back-dragging working condition;

the acquisition module is used for acquiring a first rotating speed threshold value of the engine according to the rotating speed of the engine under the condition of the back-dragging operation;

the calculation and correction module is used for calculating the rotating speed rising rate of the engine, and when the rising rate is larger than a preset rising rate threshold, the first rotating speed threshold is corrected to obtain a corrected second rotating speed threshold;

an activation module activates auxiliary braking when a speed of the engine is greater than the second speed threshold.

7. The apparatus of claim 6, further comprising:

and the judging module is used for judging whether the engine enters a back-dragging working condition or not.

8. The apparatus of claim 6, wherein said calculating a rate of increase of engine speed, and wherein modifying said first speed threshold when said rate of increase is greater than a preset rate of increase threshold comprises:

and calculating the rising rates of three continuous steps of the engine speed, and correcting the first speed threshold when the rising rates of the three continuous steps are all larger than a preset rising rate threshold.

9. A control device for automatically activating auxiliary braking, characterized by comprising:

one or more processors, storage devices storing one or more programs;

one or more processors implementing a control method for automatically activating auxiliary braking according to any one of claims 1 to 5 when said one or more programs are executed by said one or more processors.

10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out a control method for automatically activating auxiliary braking according to any one of claims 1 to 5.

Technical Field

The invention relates to the technical field of engine control, in particular to a control method, a control device, control equipment and a storage medium for automatically activating auxiliary braking.

Background

At present, when a driver steps on a heavy load and descends a long slope in the running process of a whole vehicle, if improper operations such as brake treading or slow gear shifting occur, the rotating speed of an engine can be caused to be overspeed, and the engine is damaged.

The existing control strategy is to lock the rotation speed when the drag-back condition occurs, and to automatically activate the auxiliary brake if the rotation speed continues to rise above a certain threshold value, so as to reduce the risk of engine overspeed. However, due to the difference of the load and the gradient of the whole vehicle, the speed of the rotation speed rise under the back-dragging working condition has great difference, the existing strategy does not consider the speed of the back-dragging rotation speed rise, only considers the rising rotation speed difference, can not well reflect the severity of the back-dragging working condition, and can not open the auxiliary brake as early as possible when the back-dragging rotation speed rises rapidly to protect the engine.

Disclosure of Invention

The embodiment of the disclosure provides a control method, a control device, control equipment and a storage medium for automatically activating auxiliary braking. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.

In some optional embodiments, a control method of automatically activating auxiliary braking, comprises:

locking the rotating speed of the engine when the engine enters a back-dragging working condition;

acquiring a first rotating speed threshold value of the engine according to the rotating speed of the engine under the condition of the back-dragging;

calculating the speed rising rate of the engine, and correcting the first speed threshold value when the speed rising rate is larger than a preset rising rate threshold value to obtain a corrected second speed threshold value;

when the rotational speed of the engine is greater than a second rotational speed threshold, auxiliary braking is activated.

Further, before locking the rotation speed of the engine when the engine enters the back-dragging working condition, the method further comprises the following steps:

and judging that the engine enters a back-dragging working condition.

Further, calculating a speed rising rate of the engine, and when the speed rising rate is larger than a preset rising rate threshold, correcting the first speed threshold, wherein the method comprises the following steps:

and calculating the rising rates of three continuous steps of the engine speed, and correcting the first speed threshold when the rising rates of the three continuous steps are all larger than a preset rising rate threshold.

Further, modifying the first speed threshold comprises:

calculating the average value of the rising rates of three continuous steps;

the first speed threshold is modified based on the average.

Further, when the rising rate is smaller than the preset rising rate threshold, the method further comprises:

judging whether the rotating speed of the engine is greater than a first rotating speed threshold value or not;

when the rotational speed of the engine is greater than a first rotational speed threshold, auxiliary braking is activated.

In some optional embodiments, a control device to automatically activate auxiliary braking, comprises:

the locking module is used for locking the rotating speed of the engine when the engine enters a back-dragging working condition;

the acquisition module is used for acquiring a first rotating speed threshold value of the engine according to the rotating speed of the engine under the condition of the back-dragging operation;

the calculation correction module is used for calculating the rotating speed rising rate of the engine, and correcting the first rotating speed threshold value when the rising rate is larger than a preset rising rate threshold value to obtain a corrected second rotating speed threshold value;

the activation module is used for activating auxiliary braking when the rotating speed of the engine is larger than a second rotating speed threshold value.

Further, still include:

and the judging module is used for judging whether the engine enters a back-dragging working condition or not.

Further, calculating a speed rising rate of the engine, and when the speed rising rate is larger than a preset rising rate threshold, correcting the first speed threshold, wherein the method comprises the following steps:

and calculating the rising rates of three continuous steps of the engine speed, and correcting the first speed threshold when the rising rates of the three continuous steps are all larger than a preset rising rate threshold.

In some optional embodiments, a control device to automatically activate auxiliary braking, comprises:

one or more processors, storage devices storing one or more programs;

when the one or more programs are executed by the one or more processors, the one or more processors implement a control method for automatically activating auxiliary braking as provided by the above embodiments.

In some optional embodiments, a computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements a control method for automatically activating auxiliary braking as provided by the above embodiments.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

the invention provides a control method for automatically activating auxiliary brake, which comprises the steps of obtaining a first rotating speed threshold value of an engine according to the rotating speed of the engine when the engine enters a dragging working condition, calculating the rotating speed rising rate of the engine, correcting the first rotating speed threshold value when the rising rate is larger than a preset rising rate threshold value to obtain a corrected second rotating speed threshold value, and activating the auxiliary brake when the rotating speed of the engine is larger than the second rotating speed threshold value. The invention can judge whether the auxiliary brake needs to be automatically activated in advance according to the speed of the rotation speed increase when the back-dragging working condition occurs, thereby improving the reliability of the engine and reducing the failure rate.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

FIG. 1 is a flow diagram illustrating a control method for automatically activating auxiliary braking in accordance with an exemplary embodiment;

FIG. 2 is a flow diagram illustrating a control method for automatically activating auxiliary braking according to an exemplary embodiment;

FIG. 3 is a schematic illustration of a control effect of automatically activating auxiliary braking, according to an exemplary embodiment;

FIG. 4 is a schematic diagram illustrating the structure of a control device for automatically activating auxiliary braking in accordance with an exemplary embodiment;

fig. 5 is a schematic diagram illustrating a configuration of a control apparatus for automatically activating auxiliary braking according to an exemplary embodiment.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.