.836 北京科技大学学报 第29卷 可相对缩短充液时间，但过小的直径会对下游液压 circuit design considerations and applications:920908.Detroit: 系统产生影响：节流孔02变化对充液特性有一定 SAE,1992 [3]李军.XC一17型蓄能器充液阀的研制.矿冶，1998,7(3)：10 的影响，过小直径会降低充液压力上升速度，增加充 [4]苏芸，ZL30C轮式装载机全液压制动系统.矿山机械，2004 液时间 (8):33 (4)充液过程中流量仅占泵总流量约1.7%，结 [5]苏先建.铲运机制动系统用蓄能器充压阀副析·矿山机械， 构参数变化对功率消耗有一定的影响，但全动力液 2001(6):26 压制动系统对车辆其他系统的影响很小，对充液系 [6]Watechagit S.Modeling and simulation of a shift hydraulic system 统进行设计首要考虑的问题是如何提高充液效率， for a stepped automatic transmission:2003-01-0314.Detroit: SAE,2003 以满足制动系统快速充液的要求， [7]中华人民共和国城乡建设环境保护部.GB8532一87轮胎式土 方机械制动系统的性能要求和试验方法，北京：中国标准出版 参考文献 社，1988 [1]Keyser D E.Hogan K.Hydraulic brake systems and components [8]David F,Reuter E,Lloyd W.Hydraulic design considerations for for off-highway vehicles and equipment:192-1.4.Milwaukee: EHB systems:2003-01-0324.Detroit:SAE.2003 National Fluid Power Association.1992 [9]Ma J.Digital electrohydraulic control for constant-deceleration e- [2]Keyser D E.Middendorf R P.Reverse modulating brake valves, mergency braking:2002-01-1464.Detroit:SAE,2002 Charging characteristics of a hydraulic braking system with accumulator for con- struction vehicles LIN Muyi),ZHA NG Wenming) 1)Mechanical and Electronic Engineering School,Beijing Information Science and Technology University.Beijing 100085.China 2)Civil and Environmental Engineering School,University of Science and Technology Beijing.Beijing 100083,China ABSTRACI A mathematical model of charging characteristics in a full power hydraulic brake system was es- tablished based on the structure and performance analysis of a new-type accumulator charging valve.The simula- tion analysis of dynamic characteristics and power expending of the charging valve were conducted,and the af- fecting laws of the valve's system parameters and structure parameters on the charging characteristics of the sys- tem were learned.Experiments are carried out to verify the simulating model. KEY WORDS construction vehicle;braking system;accumulator;charging characteristics可相对缩短充液时间‚但过小的直径会对下游液压 系统产生影响；节流孔 O2 变化对充液特性有一定 的影响‚过小直径会降低充液压力上升速度‚增加充 液时间． （4） 充液过程中流量仅占泵总流量约1∙7％‚结 构参数变化对功率消耗有一定的影响‚但全动力液 压制动系统对车辆其他系统的影响很小‚对充液系 统进行设计首要考虑的问题是如何提高充液效率‚ 以满足制动系统快速充液的要求． 参 考 文 献 ［1］ Keyser D E‚Hogan K．Hydraulic brake systems and components for off-highway vehicles and equipment：I92—1∙4．Milwaukee： National Fluid Power Association‚1992 ［2］ Keyser D E‚Middendorf R P．Reverse modulating brake valves‚ circuit design considerations and applications：920908．Detroit： SAE‚1992 ［3］ 李军．XC—17型蓄能器充液阀的研制．矿冶‚1998‚7（3）：10 ［4］ 苏芸．ZL30C 轮式装载机全液压制动系统．矿山机械‚2004 （8）：33 ［5］ 苏先建．铲运机制动系统用蓄能器充压阀剖析．矿山机械‚ 2001（6）：26 ［6］ Watechagit S．Modeling and simulation of a shift hydraulic system for a stepped automatic transmission：2003—01—0314．Detroit： SAE‚2003 ［7］ 中华人民共和国城乡建设环境保护部．GB8532—87轮胎式土 方机械制动系统的性能要求和试验方法．北京：中国标准出版 社‚1988 ［8］ David F‚Reuter E‚Lloyd W．Hydraulic design considerations for EHB systems：2003—01—0324．Detroit：SAE‚2003 ［9］ Ma J．Digital electrohydraulic control for constant-deceleration e￾mergency braking：2002—01—1464．Detroit：SAE‚2002 Charging characteristics of a hydraulic braking system with accumulator for con￾struction vehicles LIN Muyi 1‚2）‚ZHA NG Wenming 1） 1） Mechanical and Electronic Engineering School‚Beijing Information Science and Technology University‚Beijing100085‚China 2） Civil and Environmental Engineering School‚University of Science and Technology Beijing‚Beijing100083‚China ABSTRACT A mathematical model of charging characteristics in a full power hydraulic brake system was es￾tablished based on the structure and performance analysis of a new-type accumulator charging valve．The simula￾tion analysis of dynamic characteristics and power expending of the charging valve were conducted‚and the af￾fecting laws of the valve’s system parameters and structure parameters on the charging characteristics of the sys￾tem were learned．Experiments are carried out to verify the simulating model． KEY WORDS construction vehicle；braking system；accumulator；charging characteristics ·836· 北 京 科 技 大 学 学 报 第29卷