Large-sized vehicle intelligent synthetic brake control system

Abstract

The invention discloses a large-scale automotive intelligent comprehensive braking control system, which comprises an accelerator pedal sensor, a brake pedal sensor, an engine rotating speed sensor, a vehicle speed sensor, a braking pressure sensor, an exhaust braking control subsystem, a retarder control subsystem, and a main braking control subsystem. The system is characterized in that the exhaust braking control subsystem, the retarder control subsystem, and the main braking control subsystem are connected with an embedded central control computer through a bus; the accelerator pedal sensor, the brake pedal sensor, the engine rotating speed sensor, the vehicle speed sensor, and the braking pressure sensor are also connected with the embedded central control computer respectively, and an intelligent comprehensive control policy library used for calculating the starting opportunity and braking strength of the subsystems is arranged in the embedded central control computer. The system has the characteristics of realizing the linkage of main braking, exhaust braking and retarder braking, reducing braking energy consumption, and improving braking safety.

Description

technical field [0001] The invention belongs to the field of braking control of vehicle engineering, and relates to a large-scale automobile intelligent comprehensive braking control system for cooperative control of various braking systems in the braking process of automobiles. Background technique [0002] Existing automobiles, especially large diesel automobiles, mainly use the following types of braking systems: main braking, which applies braking force to the wheels through the brake pads, and can provide the largest braking force; retarder braking, which uses hydraulic pressure Or the form of eddy current to apply braking force to the drive train to achieve braking. In addition to the braking effect, the braking energy can also be stored; exhaust braking, by closing the exhaust valve of the diesel engine, applies braking force to the engine. The structure Simple, but exerts less force. At present, during the braking process of large vehicles, the above three braking s...

AI Technical Summary

Problems solved by technology

Taking the exhaust brake as an example, when braking, the driver makes a judgment according to the driving environment and controls the corresponding button to start the work of the exhaust brake system, so there will be the following problems: (1) due to the exhaust brake Auxiliary braking systems, such as retarder braking, are often used in complex road conditions. In this environment, drivers are usually in a state of high mental stress, which may lead to forgetting to activate the auxiliary braking system, resulting in waste of resources. cause accidents; (2) auxiliary braking, especially exhaust braking, has an impact on engine operation, so if the engine throttle is increased or the transmission is shifted during the implementation process, the engine may stall, which will not only fail to achieve The purpose of vehicle deceleration, and the air pump powered by the driving brake and the steering oil pump powered by the engine cannot work because the engine is turned off, which affects the safety of driving

(3) After the auxiliary braking is activated, it will affect the braking force distribution of the service braking system, which will endanger the braking stability of the vehicle system

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