阅读说明：本技术 一种整车联合制动控制方法 (Vehicle combined braking control method ) 是由 李少佳 张彦辉 于 2020-06-11 设计创作，主要内容包括：本发明公开了一种整车联合制动控制方法,其步骤如下：步骤S1,收集制动踏板开度信号；步骤SS1将制动踏板开度与标定的制动踏板开度阈值比较,如果制动踏板开度大于等于标定的制动踏板开度阈值,那么执行步骤S4；否则执行步骤S5；步骤S3,向缓速器发送制动请求,请求步骤S2中得到的缓速器制动扭矩比,此装置基于制动踏板开度进行联合制动,根据制动踏板开度,自动调节缓速器制动扭矩比,自动启动关闭发动机缸内制动、排气制动功能。仅通过制动踏板即可完成行车制动联动各个辅助制动功能,这样操作简单,将这整车上的各制动功能集中在一起,实现统一管理与控制。(The invention discloses a vehicle combined brake control method, which comprises the following steps: step S1, collecting a brake pedal opening signal; step SS1 compares the brake pedal opening with a calibrated brake pedal opening threshold, if the brake pedal opening is greater than or equal to the calibrated brake pedal opening threshold, then step S4 is executed; otherwise, executing step S5; and step S3, sending a braking request to the retarder, requesting the retarder braking torque ratio obtained in step S2, performing combined braking by the device based on the opening degree of a brake pedal, automatically adjusting the retarder braking torque ratio according to the opening degree of the brake pedal, and automatically starting and closing the functions of in-cylinder braking and exhaust braking of the engine. The auxiliary braking functions of the service braking linkage can be completed only through the brake pedal, so that the operation is simple, the braking functions of the whole vehicle are integrated, and unified management and control are realized.)

1. A whole vehicle combined braking control method is characterized in that: the method comprises the following steps:

step S1, collecting the opening signal of the brake pedal, processing the signal by the collected related sensor, or obtaining the signal by the message, and then executing the step S2;

step S2, step SS1, step SS2 and step SS3 are carried out simultaneously;

step SS1 compares the brake pedal opening with a calibrated brake pedal opening threshold value 1, if the brake pedal opening is greater than or equal to the calibrated brake pedal opening threshold value 1, then step S4 is executed; otherwise, executing step S5;

step SS2, obtaining a retarder braking torque ratio according to a curve calibrated by a brake pedal opening check, and then executing step S3;

step SS3 compares the brake pedal opening with a calibrated brake pedal opening threshold value 2, if the brake pedal opening is greater than or equal to the calibrated brake pedal opening threshold value 2, then step S6 is executed; otherwise, executing step S7;

step S3, sending a braking request to the retarder, and requesting the retarder braking torque ratio obtained in step S2;

step S4, requesting an in-cylinder brake function of the engine to activate in-cylinder braking;

step S5, requesting the engine in-cylinder brake function to close the in-cylinder brake;

step S6, requesting the engine exhaust brake function to initiate exhaust braking;

in step S7, the engine exhaust brake function is requested to turn off exhaust braking.

Technical Field

The invention belongs to the technical field of automobile electronics, and particularly relates to a whole automobile combined brake control method.

Background

The retarder is arranged on most of domestic heavy-duty automobiles, the engine has in-cylinder braking and exhaust braking functions, the auxiliary braking functions are reasonably applied and coordinated with service braking, namely combined braking is carried out, the safety problems that a braking system is heated to cause braking failure and the like due to long-time service braking are solved, tire abrasion is reduced, and cost is saved. However, most of the auxiliary braking functions in the prior art are independent, and although the auxiliary braking functions can be coordinated with the service braking, the auxiliary braking functions cannot be controlled jointly from the aspects of vehicle power assembly management, braking system integration and the like, so that the problems of single function, poor safety, complex operation and the like exist.

The problems of the existing products are as follows: single function, complex operation and lack of systematic centralized control.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a vehicle combined brake control method.

The purpose of the invention can be realized by the following technical scheme:

a whole vehicle combined braking control method comprises the following steps:

step S1, collecting the opening signal of the brake pedal, processing the signal by the collected related sensor, or obtaining the signal by the message, and then executing the step S2;

step S2, step SS1, step SS2 and step SS3 are carried out simultaneously;

step SS1 compares the brake pedal opening with a calibrated brake pedal opening threshold value 1, if the brake pedal opening is greater than or equal to the calibrated brake pedal opening threshold value 1, then step S4 is executed; otherwise, executing step S5;

step SS2, obtaining a retarder braking torque ratio according to a curve calibrated by a brake pedal opening check, and then executing step S3;

step SS3 compares the brake pedal opening with a calibrated brake pedal opening threshold value 2, if the brake pedal opening is greater than or equal to the calibrated brake pedal opening threshold value 2, then step S6 is executed; otherwise, executing step S7;

step S3, sending a braking request to the retarder, and requesting the retarder braking torque ratio obtained in step S2;

step S4, requesting an in-cylinder brake function of the engine to activate in-cylinder braking;

step S5, requesting the engine in-cylinder brake function to close the in-cylinder brake;

step S6, requesting the engine exhaust brake function to initiate exhaust braking;

in step S7, the engine exhaust brake function is requested to turn off exhaust braking.

The invention has the beneficial effects that:

the control method can carry out combined braking based on the opening degree of the brake pedal, automatically adjust the brake torque ratio of the retarder according to the opening degree of the brake pedal, and automatically start and stop the functions of braking and exhaust braking in an engine cylinder. The auxiliary braking functions of the service braking linkage can be completed only through the brake pedal, so that the operation is simple, the braking functions of the whole vehicle are integrated, and unified management and control are realized.

Drawings

Fig. 1 is a flowchart of a vehicle combined brake control method.

Detailed Description

The technical scheme of the invention is further described by combining the attached drawings:

a whole vehicle combined braking control method comprises the following steps:

step S1, collecting the opening signal of the brake pedal, processing the signal by the collected related sensor, or obtaining the signal by the message, and then executing the step S2;

step S2, step SS1, step SS2 and step SS3 are carried out simultaneously;

step SS1 compares the brake pedal opening with a calibrated brake pedal opening threshold, if the brake pedal opening is greater than or equal to the calibrated brake pedal opening threshold, then step S4 is executed; otherwise, executing step S5;

step SS2, obtaining a retarder braking torque ratio according to a curve calibrated by a brake pedal opening check, and then executing step S3;

step SS3 compares the brake pedal opening with a calibrated brake pedal opening threshold value 2, if the brake pedal opening is greater than or equal to the calibrated brake pedal opening threshold value 2, then step S6 is executed; otherwise, executing step S7;

step S3, sending a braking request to the retarder, and requesting the retarder braking torque ratio obtained in step S2;

step S4, requesting an in-cylinder brake function of the engine to activate in-cylinder braking;

step S5, requesting the engine in-cylinder brake function to close the in-cylinder brake;

step S6, requesting the engine exhaust brake function to initiate exhaust braking;

in step S7, the engine exhaust brake function is requested to turn off exhaust braking.

Finally, it should be noted that:

the method may be carried out and its application may be carried out by those skilled in the art with reference to the disclosure herein, and it is expressly intended that all such alternatives and modifications as would be apparent to those skilled in the art are deemed to be included within the invention. While the method and application of the present invention have been described in terms of preferred embodiments, it will be apparent to those of ordinary skill in the art that variations and modifications in the method and application of the invention as described herein may be made and equivalents employed without departing from the spirit and scope of the invention.

Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention, and the appended claims are intended to cover such modifications and equivalents as fall within the true spirit and scope of the invention.