【作者】 郭玉平；

【导师】 方泳龙；

【作者基本信息】 吉林大学 ， 车辆工程， 2011， 硕士

【摘要】 汽车制动系是用以强制行驶中的汽车减速或停车、使下坡行驶的汽车车速保持稳定以及使已停驶的汽车在原地(包括在斜坡上)驻留不动的机构。随着高速公路的迅速发展和车速的提高以及车流密度的日益增大,为了保证行车安全,汽车制动系的工作可靠性显得日益重要。也只有制动性能良好、制动系工作可靠的汽车,才能充分发挥其动力性能。本文通过某载货汽车制动系统的设计,系统详细的将油压整车制动系统进行了阐述。制动系统匹配设计主要是根据设计任务书的要求,整车配置、布置及参数,参考同类车型参数,选择制动器型式、结构及参数,然后校核计算,验证所选参数是否满足设计任务书及法规的要求,满足要求后初步确定参数。由于本文参考样车为油压制动车型,操纵系统为液压操纵、真空助力。因此,本匹配计算主要以上述车型及操纵系统为基础进行基础制动系统及调节装置的匹配计算。在整车制动系统设计之初,首先利用设计任务书提供的整车制动参数绘制出绘出理想制动力分配I曲线,确定空载或满载时的同步附着系数,然后,计算出制动器制动力分配系数,绘出β线。将I、β曲线进行分析比较,初步选择合适的制动力分配系数;为保证整车的制动稳定性和制动效率,该车型采用了制动调节装置——油压感载比例阀;在确定了前后制动器制动力分配系数后,结合制动系统总布置形式,完成了制动器和制动操作系统的选择和计算。在制动系统匹配校核计算时,主要进行前、后制动力分配校核、系统工作压力校核、行车及驻车制动操纵系统的校核及计算、行车制动系统效能的校核、应急制动及部分失效的制动效能校核、制动器能容量的校核;校核的标注主要是看是否满足GB12676-1999《汽车制动系结构、性能和试验方法》、GB7258-2004《机动车运行安全技术条件》、ECE等制动法规对制动系的性能、要求及试验方法的规定。同时,为提本车型的车性能,在部分性能的要求,又会对制动性能提出高于以上标准的要求,这些要求会在设计任务书中体现,因此,对设计任务书要求高于法规要求的,要按设计任务书要求设计。更多还原

【Abstract】 Automobile brake system is used to force the running of the vehicle to slow or stop, the vehicle speed of the driving downhill remained stable and that the car had been stopped in situ ( including on the slope ) resides not moving mechanism. With the rapid development of Expressway and increase the speed and traffic density increasing day by day, in order to guarantee the traffic safety, automotive braking system working reliability becomes more and more important. Only excellent braking performance, braking system work reliable car, in order to give full play to its dynamic performance.This article through a truck brake system design, system of hydraulic vehicle braking system is discussed. Brake system matching design is mainly based on the requirements of the mission design, vehicle configuration, layout and parameter, reference congener model parameters, selection of brake type, structure and parameter, and then checking calculation, verification of selected parameters can meet the design task book and regulatory requirements, meet the requirements after the initial identification of parameters.The vehicle hydraulic brake system for vehicle, control for hydraulic control, vacuum booster. Therefore, the matching calculation of the above models and main control system based on foundation braking system and regulating device matching calculation. In vehicle brake system was first designed, first using the design task book provides the vehicle brake parameter draw draw the ideal braking force distribution curve to determine I, empty or full load of synchronous adhesion coefficient, then, calculate the braking force distribution coefficient, draw the beta line. I, beta curve were analyzed, a preliminary selection of suitable braking force distribution coefficient; to ensure the vehicle braking stability and braking efficiency, the model uses a brake adjusting device of hydraulic load sensing proportioning valve; in the front and rear braking force distribution coefficient, combined braking system general layout, complete brake and brake operating system selection and calculation.In the braking system matching calculation, the main front, rear braking force distribution system pressure check, check, traffic and parking brake control system of checking and calculating, the brake system performance check, emergency braking and partial neutralization of the braking efficiency, brake check capacity check; check mark is mainly to see whether or not to meet the GB12676-1999" automobile braking system structure, performance and test methods motor vehicles," GB7258-2004" safe technical requirements, such as" ECE braking regulation of the braking system performance, requirements and test methods of regulation. At the same time, carry the vehicle vehicle performance, in part performance requirements, and will be on the braking performance of above standards, these requirements will be reflected in the design task book, therefore, the design task book requirements higher than the requirements of the regulations, according to the design task book requirements design.更多还原