汽車技術(shù)雜志2010年第9期目 次基于LabVIEW RT的硬件在環(huán)仿真（摘要鏈接）2基于逆向工程技術(shù)的輪胎3D模型設(shè)計(jì)研究（摘要鏈接）3CANoe-Matlab聯(lián)合仿真在DCT總線控制中的應(yīng)用（摘要鏈接）4面向C-NCAP的正面乘員約束系統(tǒng)優(yōu)化設(shè)計(jì)（摘要鏈接）5先進(jìn)技術(shù)在4D20轎車柴油機(jī)開發(fā)中的應(yīng)用（摘要鏈接）6ABS液壓控制系統(tǒng)壓力變化速率的機(jī)理研究（摘要鏈接）7并聯(lián)混合動(dòng)力轎車傳動(dòng)比初選方法（摘要鏈接）8基于ADAMS/CAR的某輕型載貨汽車前懸架仿真分析（摘要鏈接）9重型載貨汽車動(dòng)力傳動(dòng)系統(tǒng)參數(shù)優(yōu)化匹配（摘要鏈接）10越野汽車試驗(yàn)場載荷信號(hào)的采集及預(yù)處理技術(shù)（摘要鏈接）11基于輪速特征的防抱死制動(dòng)系統(tǒng)故障檢測技術(shù)研究（摘要鏈接）12基于路譜輸入的汽車臺(tái)架耐久性試驗(yàn)方法研究（摘要鏈接）13雙流量EGR率測量系統(tǒng)開發(fā)（摘要鏈接）14發(fā)動(dòng)機(jī)缸蓋螺栓斷裂失效分析（摘要鏈接）15汽車車身A級(jí)曲面的表示與次數(shù)選擇（摘要鏈接）16基于LabVIEW RT的硬件在環(huán)仿真（吉林大學(xué) 汽車動(dòng)態(tài)模擬國家重點(diǎn)實(shí)驗(yàn)室）【摘要】利用實(shí)時(shí)仿真環(huán)境LabVIEW RT，構(gòu)建了包括整車轉(zhuǎn)向盤轉(zhuǎn)角、油門、制動(dòng)物理信號(hào)的硬件在環(huán)仿真系統(tǒng)。采用實(shí)時(shí)車輛動(dòng)力學(xué)軟件CarSim RT建立了車輛模型，并利用所搭建的試驗(yàn)臺(tái)架進(jìn)行了HIL仿真。結(jié)果表明，利用LabVIEW RT和CarSim RT能快速搭建面向整車開發(fā)的HIL系統(tǒng)，所建系統(tǒng)性價(jià)比高，而且有很好的實(shí)時(shí)性和擴(kuò)展性。主題詞：整車開發(fā)硬件在環(huán) 動(dòng)力學(xué)仿真 LabVIEW RT The Simulation of Hardware-in-the-Loop based on LabVIEW RT (State Key Laboratory of Automobile Dynamic Simulation, Jilin University)【Abstract】The hardware-in-the-loop (HIL) simulation system is established with real-time simulation environment LabVIEW RT, which includes steer wheel angle, throttle and physical signal of braking. The real-time vehicle dynamics simulation software CarSim RT is used to establish the vehicle model. The HIL simulation is executed with the established test rig. It is shown that the HIL system for vehicle development can quickly be established, using LabVIEW RT and CarSim RT with well real time and expansible, furthermore the system has high performance-price ratio.Key words: Vehicle development Hardware-in-the-loop; Dynamics simulation; LabVIEW RT基于逆向工程技術(shù)的輪胎3D模型設(shè)計(jì)研究 （同濟(jì)大學(xué)）【摘要】以195/65R15規(guī)格的輪胎為例，利用三維激光掃描儀對(duì)輪胎進(jìn)行掃描，通過CATIA軟件對(duì)所得點(diǎn)云數(shù)據(jù)進(jìn)行處理，實(shí)現(xiàn)曲面重構(gòu)，建立了輪胎的3D模型。對(duì)依據(jù)逆向工程技術(shù)建立的輪胎3D模型特征尺寸與輪胎實(shí)物測量尺寸比較分析表明，所建模型與實(shí)際輪胎外形吻合良好，可為進(jìn)行輪胎特性研究提供參考。關(guān)鍵詞：逆向工程；輪胎；模型；CATIAResearch of 3D Tire Model design based on Reverse Engineering TechnologyLei Lei, Zuo Shuguang, Yang Xianwu, Wu Xudong, Li Yong(Tongji University)【Abstract】This article takes the tire sizing 195/65R15 as an example, through scanning with 3D laser scanners, processing cloud points by CATIA, reconstructs the curved surface and establishes a 3D tire model. Then contrast between the 3D model characteristic dimension established with reverse engineering and the tires dimension measured indicates that the model built coincides with the factual shape of the tire, this can provide reference for tire characteristic study.Key words: Reverse engineering; Tire; Model; CATIACANoe-Matlab聯(lián)合仿真在DCT總線控制中的應(yīng)用張建國1,2 雷雨龍1 劉洪波1 宗長富1 馬文松3（1.吉林大學(xué) 汽車動(dòng)態(tài)模擬國家重點(diǎn)實(shí)驗(yàn)室；2.裝甲兵技術(shù)學(xué)院；3. 中國第一汽車集團(tuán)公司技術(shù)中心）【摘要】提出了電動(dòng)干式雙離合器轎車的整車綜合控制策略。采用CANoe-Matlab聯(lián)合仿真的方法建立了帶有DCT系統(tǒng)的整車模型，并對(duì)其CAN網(wǎng)絡(luò)進(jìn)行仿真；向CAN總線收發(fā)DCT換檔過程中所需的報(bào)文和共享信息，重點(diǎn)驗(yàn)證了總線的運(yùn)行情況和實(shí)時(shí)性。整車試驗(yàn)結(jié)果表明，通過CAN總線使TCU與ECU之間進(jìn)行實(shí)時(shí)通信，對(duì)發(fā)動(dòng)機(jī)、雙離合器和變速器三者進(jìn)行協(xié)調(diào)控制，能夠有效提高DCT轎車的換擋品質(zhì)，實(shí)現(xiàn)其動(dòng)力換擋。主題詞：雙離合器變速器 CAN總線 控制 聯(lián)合仿真 Application of CANoe-Matlab Co-simulation in DCT-CAN Bus ControlZhang Jianguo1,2, Lei Yulong1, Liu Hongbo1, Zong Changfu1, Ma Wensong3(1.State Key Laboratory of Automobile Dynamic Simulation, Jilin University; 2. Armor Technique Institute of PLA; 3. China FAW Group Corporation R&D Center)【Abstract】An integrated control strategy for a car equipped with electrical dry-type dual-clutch is introduced in the paper. Then a vehicle simulation model with DCT is built in Matlab/Simulink co-simulation method, and its CAN network is simulated. The message and shared information required in the shifting process of CAN bus receiving and sending DCT validates bus operating condition and real-time performance. The vehicle test results show that CAN bus enables real-time communication between TCU and ECU, coordinated control between engine, dual clutch and transmission, can effectively improve shifting quality of car equipped with DCT and achieve power shifting. Key words: DCT; CAN bus; Control; Co-simulation面向C-NCAP的正面乘員約束系統(tǒng)優(yōu)化設(shè)計(jì)瞿喆文（泛亞汽車技術(shù)中心有限公司）【摘要】從某車型面向C-NCAP的正面乘員約束系統(tǒng)開發(fā)入手，經(jīng)分析指出其優(yōu)化流程應(yīng)將正面剛性墻試驗(yàn)的約束系統(tǒng)參數(shù)優(yōu)化作為主要條件，將正面偏置可變形障壁試驗(yàn)的約束系統(tǒng)參數(shù)優(yōu)化作為約束條件，同時(shí)考察約束系統(tǒng)各參數(shù)對(duì)不同工況中乘員傷害的影響。介紹了如何運(yùn)用CAE以及正面約束系統(tǒng)優(yōu)化分析方法對(duì)參數(shù)進(jìn)行優(yōu)化的過程。關(guān)鍵字：C-NCAP，正面乘員約束系統(tǒng)，優(yōu)化設(shè)計(jì)Optimization of Frontal Restraint System Based on C-NCAPQu Zhewen(Pan Asian Technical Automotive Center Co., Ltd)【Abstract】This paper begins from the development of frontal restraint system of a vehicle model based on C-NCAP, it points out according to analysis that its optimization process shall take the parameter optimization of the restraint system for the frontal rigid wall test as main conditions, and take restraint system parameter optimization of the frontal offset deformable barrier test as restraint conditions, meanwhile investigates the influence of parameters of the restraint system on occupant injury under different conditions. The process of how to apply CAE and frontal restraint system optimization on parameter optimization is introduced in the paper.Key words: C-NCAP; Frontal occupant restraint system; Optimization先進(jìn)技術(shù)在4D20轎車柴油機(jī)開發(fā)中的應(yīng)用董仁1 趙福全2 袁兆成1 吳成明2（1.吉林大學(xué) 汽車動(dòng)態(tài)模擬國家重點(diǎn)實(shí)驗(yàn)室； 2.浙江吉利汽車研究院）【摘要】介紹了吉利4D20轎車柴油機(jī)開發(fā)所應(yīng)用的電控高壓共軌噴油系統(tǒng)、冷卻式廢氣再循環(huán)、尾氣后處理裝置、帶VNT的渦輪增壓中冷及可變進(jìn)氣渦流控制等先進(jìn)技術(shù)。對(duì)整機(jī)按照歐洲排放測試循環(huán)進(jìn)行了臺(tái)架試驗(yàn)。結(jié)果表明，由于采用了眾多先進(jìn)技術(shù)，4D20轎車柴油機(jī)最高功率達(dá)100kW,升功率達(dá)50kW/L，全負(fù)荷工況最低油耗僅為210 g/（kW.h），最大扭矩為307N.m(1800r/min)，最大扭矩時(shí)噪聲為85dB（A），同時(shí)排放各項(xiàng)指標(biāo)均低于歐V排放標(biāo)準(zhǔn)限值。主題詞：柴油機(jī) 先進(jìn)技術(shù) 應(yīng)用The Application of Advanced Technologies in the Development of Geely4D20 Car Diesel EngineDong Ren1 Zhao Fuquan2 Yuan Zhaocheng1 Wu Chengming2(1. State Key Laboratory of Automobile Dynamic Simulation of Jilin University; 2 Automobile Research Institute of Zhejiang Geely Co., Ltd)【Abstract】Some advanced technologies applied to Geely4D20 car diesel engine are introduced, e.g. electronic-control high-pressure common-rail injection system, EGR, tail gas after-treatment, turbo-charge and inter-cooling with VNT, variable intake swirl control, etc. The bench test of complete engine is performed according to European emission test cycle, the result shows that with many advanced technologies applied, the maximum power of the engine reaches 100kW, power per liter reaches 50kW/L, the minimum fuel consumption under full load condition is only 210g/(kW.h), peak torque reaches 307N.m (1800r/min), the noise level at the maximum torque is 85dB(A), meanwhile, the emission indices are lower than the limits of Euro V emission standard.Key words: Diesel Engine; Advanced technology; ApplicationABS液壓控制系統(tǒng)壓力變化速率的機(jī)理研究初亮1 歐陽1 張永生1 徐明法1 晁黎波1 盧文博1 劉明輝2（1吉林大學(xué)；2中國第一汽車集團(tuán)公司技術(shù)中心）【摘要】在研究ABS液壓控制系統(tǒng)結(jié)構(gòu)和原理的基礎(chǔ)上，對(duì)制動(dòng)壓力變化速率進(jìn)行了理論分析。利用Matlab和AMESim軟件平臺(tái)建立了整車模型和ABS控制策略，并進(jìn)行聯(lián)合仿真，驗(yàn)證了液壓調(diào)節(jié)單元的相關(guān)部件特性參數(shù)對(duì)壓力變化速率的影響以及高速開關(guān)閥控制信號(hào)與其臨界頻率之間的關(guān)系。通過臺(tái)架試驗(yàn)對(duì)國外某公司的ABS液壓調(diào)節(jié)單元進(jìn)行研究，得出了在具體控制周期時(shí)PWM信號(hào)占空比的有效調(diào)節(jié)范圍。主題詞：ABS 液壓控制系統(tǒng) 壓力變化 研究Mechanism Study of Pressure Change Rate of ABS Hydraulic Control SystemChu Liang1, Ou Yang1, Zhang Yongsheng1, Xu Mingfa1, Chao Libo1, Lu Wenbo1, Liu Minghui2(1. Jilin University; 2. China FAW Group Corporation R&D Center)【Abstract】Based on the research of structure and operating principle of ABS hydraulic control system, a theoretical analysis is made to the braking pressure change rate. A vehicle model and ABS control strategy are built with Matlab and AMESim software platform, which are co-simulated, the influence of related components characteristic parameter of the hydraulic adjusting unit on pressure change rate and the correlation between high velocity switch valve control signal and its critical frequency are verified. A research is made to ABS hydraulic adjusting unit made by an overseas company in rig test, in which the effective adjustment range of PWM signal duty cycle in a certain control period is derived.Key words: ABS; Hydraulic control system; Pressure change; Research并聯(lián)混合動(dòng)力轎車傳動(dòng)比初選方法鐘再敏 馬勇（同濟(jì)大學(xué)）【摘要】通過分析，對(duì)混合動(dòng)力汽車傳動(dòng)比的選擇給出了初步結(jié)論：從動(dòng)力性角度出發(fā)，當(dāng)動(dòng)力源工作在最大功率點(diǎn)時(shí)，恰當(dāng)選擇傳動(dòng)系統(tǒng)的總傳動(dòng)比，使得汽車能夠達(dá)到最高設(shè)計(jì)車速，選擇此時(shí)傳動(dòng)比為最小傳動(dòng)比；綜合考慮最大爬坡度、附著率及汽車最低穩(wěn)定車速3方面的問題確定最大傳動(dòng)比；最大和最小傳動(dòng)比之間的中間擋位應(yīng)按照等比級(jí)數(shù)分配傳動(dòng)比的原則進(jìn)行分配。關(guān)鍵詞：并聯(lián)混合動(dòng)力汽車，傳動(dòng)比，動(dòng)力性The Method of Drive Ratio Configuration for Parallel Hybrid CarZhong Zaimin1 Ma Yong1(Tongji University)【Abstract】A primary conclusion is given for the selection of drive ratio of hybrid car based on analysis: from the dynamic point of view, when the power source operates at the maximum power point, selecting appropriately the overall drive ratio of the driveline, which enables the vehicle to obtain the maximum design speed, the drive ratio selected at this moment is the minimum drive ratio; define the maximum drive ratio based on the maximum gradient, adhesion rate and the minimum vehicle stable speed; the intermediate gear between the maximum and minimum drive ratio shall be assigned according to the principle of geometric sequence drive ratio assignment.Key words: Parallel hybrid vehicle; Drive ratio; Dynamics基于ADAMS/CAR的某輕型載貨汽車前懸架仿真分析黃東明1 王良模1 井廣紅2 尹春華2 王森2（1.南京理工大學(xué)； 2.南京依維柯汽車有限公司）【摘要】利用Adams/Car軟件建立了某輕型載貨汽車雙橫臂獨(dú)立前懸架系統(tǒng)動(dòng)力學(xué)模型，并選取雙輪同向激振工況進(jìn)行了仿真，分析了車輪跳動(dòng)過程中參數(shù)變化對(duì)懸架性能的影響。結(jié)果表明，前懸架的主銷橫向偏移距偏大，容易發(fā)生制動(dòng)跑偏，前束變化不合理；車輪跳動(dòng)過程中輪距變化較大，會(huì)引起兩側(cè)輪胎方向相反的側(cè)偏運(yùn)動(dòng)，導(dǎo)致輪胎磨損，同時(shí)影響汽車的操縱穩(wěn)定性。主題詞：載貨汽車 雙橫臂獨(dú)立前懸架 仿真分析Simulative Analysis of Front Suspension of A Light Duty Truck Based on ADAMS/CARHuang Dongming1, Wang Liangmo1, Jing Guanghong2, Yin Chunhua2, Wang Sen2(1.Nanjing University of Science and Technology; 2.Nanjing IVECO Motor Company Ltd)【Abstract】A dynamic model of a wishbone front suspension system for a light duty truck was built with software Adams/Car, and the parallel wheel travel was chosen and simulated, the influence of parameter change on suspension performance during wheel bounce was analyzed. The results show that excessive high kingpin transverse offset of the front suspension leads to braking deflection and improper toe-in variation; while the excessive change of the track during wheel bounce leads to slip of the tires to opposite direction, and leads to tire wear, handling stability of the vehicle will be adversely affected.Key words: Truck; Wishbone front suspension; Simulative analysis重型載貨汽車動(dòng)力傳動(dòng)系統(tǒng)參數(shù)優(yōu)化匹配王 鐵1 武玉維1 李萍鋒1 鄭利鋒2 王曉2( 1.太原理工大學(xué)；2.太原長安重型汽車有限公司）【摘要】針對(duì)某重型載貨汽車油耗過高問題，利用仿真軟件AVLCrusie建立了整車性能仿真模型，采用MATLAB軟件建立了數(shù)學(xué)分析方程，并集成到優(yōu)化平臺(tái)ISIGHT軟件中，對(duì)汽車動(dòng)力傳動(dòng)系統(tǒng)的速比參數(shù)進(jìn)行了優(yōu)化設(shè)計(jì)和匹配。結(jié)果表明，經(jīng)優(yōu)化設(shè)計(jì)后，在滿足汽車動(dòng)力性各項(xiàng)設(shè)計(jì)指標(biāo)的前提下，該車輛驅(qū)動(dòng)功率損失率降低了0.28%，6工況循環(huán)油耗降低了3.7%。主題詞：重型載貨汽車 傳動(dòng)系參數(shù) 優(yōu)化The Parameter Optimized Matching of Powertrain for Heavy Duty TruckWang Tie1, Wu Yuwei1, Li Pingfeng1 ,Zheng Lifeng2,Wang Xiao2（1. Taiyuan University of Technology; 2. Taiyuan Changan Heavy-Duty Truck Co., Ltd）【Abstract】 To solve the problem of high fuel consumption of a heavy duty truck, a vehicle performance simulation model is established with software AVLCrusie, and a mathematic analysis equation is established with MATLAB, which is integrated to a optimized platform ISIGHT software, and optimization and matching are made to the speed ratio of powertrain. The results indicate that, after optimization design, driving power loss of the vehicle decreases by 0.28%, and fuel consumption in 6-cycle decreases by 3.7%, while satisfying the design criteria of vehicle dynamic property.Key words: Heavy-duty truck; Powertrain parameters, Optimization越野汽車試驗(yàn)場載荷信號(hào)的采集及預(yù)處理技術(shù)趙曉鵬 馮樹興 張 強(qiáng) 姜 丁 譚國斌 岳巍強(qiáng)（解放軍總后勤部軍事交通運(yùn)輸研究所）【摘要】以某型越野車為研究對(duì)象，在某試驗(yàn)場不同道路條件下進(jìn)行了整車載荷信號(hào)采集，并介紹了信號(hào)采集方法。為提高數(shù)據(jù)采集的真實(shí)性和可靠性，對(duì)試驗(yàn)場載荷信號(hào)進(jìn)行了信號(hào)時(shí)標(biāo)的一致性處理、異常點(diǎn)判別與剔除、趨勢項(xiàng)消除、數(shù)據(jù)檢驗(yàn)、樣本選擇及傅里葉低通濾波等預(yù)處理，為下一步進(jìn)行室內(nèi)道路模擬試驗(yàn)載荷譜的強(qiáng)化處理奠定了基礎(chǔ)。主題詞：越野汽車；道路試驗(yàn)；載荷信號(hào)；預(yù)處理技術(shù) Acquisition and Pretreatment of Load Signals of An Off Road Vehicle from A Proving GroundZhao Xiaopeng, Feng Shuxing, Zhang Qiang, Jiang Ding, Tan Guobin,Yue Weiqiang(Institute of Military Transportation, the General Logistic Dept., PLA)【Abstract】 This paper takes an off-road vehicle as research object, and introduces vehicle load signal acquisition under different road conditions in a proving ground, the signal acquisition method is also introduced in the paper. To improve authenticity and reliability of data acquisition, consistency treatment on signal time-tag, abnormal point identification and removal, tendency elimination, data inspection, sample selection as well as Fourier low-pass filter pretreatment, etc. are made to the load signals from the proving ground, this lays foundation for the enhancement of load spectrum of the indoor road simulation test.Key words: Off-road vehicle; Road test; Loading signal; Pretreatment technology基于輪速特征的防抱死制動(dòng)系統(tǒng)故障檢測技術(shù)研究張永輝 宋健（清華大學(xué) 汽車安全與節(jié)能國家重點(diǎn)實(shí)驗(yàn)室） 【摘要】比較了磁電式和霍爾式傳感器最低測量輪速的影響因素，分析了控制軟件最低計(jì)算輪速與采樣周期的關(guān)系，明確了防抱死制動(dòng)系統(tǒng)最低輪速的成因。基于單輪動(dòng)力學(xué)模型研究了車輪在正常工況下角加速度及其變化率的物理限值。以最低輪速、輪角加速度及其變化率作為特征，設(shè)計(jì)了輪速在線故障檢測算法，利用故障模擬試驗(yàn)對(duì)算法進(jìn)行了驗(yàn)證，結(jié)果表明該技術(shù)可有效識(shí)別多種類型的輪速故障。主題詞：防抱死制動(dòng)系統(tǒng) 故障檢測 輪速傳感器 Research on Fault Detection Technology of Anti-lock Braking System Based on Wheel-speed Characteristics Zhang Yonghui Song Jian (State Key Laboratory of Automotive Safety and Energy, Tsinghua University)【Abstract】 Effect factors of the lowest measurable speed for magnetic-electric and hall speed sensor were compared, and the relationship between the lowest calculable speed and sampling period of control software were analyzed, the origin of ABS lowest wheel speed was specified. Based on single wheel dynamic model, the physical limitation of wheel angular acceleration and its change ratio in normal condition was researched. The lowest speed, angular acceleration and its change ratio were selected as wheel speed characteristics, and online fault detection algorithm was proposed, it was validated in fault simulation test. The results show that this technology can effectively detect various wheel speed faults.Key words: Anti-lock braking system; Fault detection; Wheel-speed sensor基于路譜輸入的汽車臺(tái)架耐久性試驗(yàn)方法研究劉再生，霍福祥，楊立峰，王長明，石鋒 （1.中國第一汽車集團(tuán)公司技術(shù)中心；2.中國汽車工程研究院）【摘要】通過對(duì)路譜驅(qū)動(dòng)汽車臺(tái)架耐久性試驗(yàn)、汽車道路耐久性試驗(yàn)及載荷譜驅(qū)動(dòng)汽車臺(tái)架耐久性試驗(yàn)的試驗(yàn)車輛響應(yīng)信號(hào)和臺(tái)架信號(hào)的對(duì)比分析，探討了路譜驅(qū)動(dòng)臺(tái)架耐久性試驗(yàn)的可行性。并依據(jù)對(duì)路譜驅(qū)動(dòng)試驗(yàn)精度的分析，提出了提高試驗(yàn)精度的途徑。主題詞：道路譜 載荷譜 耐久性 臺(tái)架試驗(yàn)Research on Method of Vehicle Durability Bench Test based on Road Profile InputLiu Zaisheng1, Huo Fuxiang1, Yang Lifeng1, Wang Changming1, Shi Feng2（1. China FAW Group Corporation R&D Center; 2. China Automobile Engineering Research Institute）【Abstract】Based on the comparison and analysis of test vehicle response signal and bench signal of the vehicle durability bench test, vehicle road durability test in road-profile drive and vehicle durability bench test in load-spectrum drive, the feasibility of road-profile driven durability bench test is discussed. And the method to improve test accuracy is proposed based on the analysis of road-profile drive test accuracy.Key words: Road Profile; Load spectrum; Durability; Bench test雙流量EGR率測量系統(tǒng)開發(fā)黃 凱1 韓永強(qiáng)1 鐘 銘2 杜文暢2 秦克印2 閻 濤2（1.吉林大學(xué) 汽車動(dòng)態(tài)模擬國家重點(diǎn)實(shí)驗(yàn)室;2.中國第一汽車集團(tuán)公司技術(shù)中心）【摘要】利用科里奧利力式回流廢氣質(zhì)量流量計(jì)和層流式進(jìn)氣流量計(jì)構(gòu)建了雙流量實(shí)時(shí)EGR率測量系統(tǒng)。在EGR階躍工況下測量了EGR率響應(yīng)特性并與傳統(tǒng)的CO2示蹤法進(jìn)行了對(duì)比，二者在穩(wěn)定段測得的EGR率相近，同時(shí)雙流量EGR率測量系統(tǒng)響應(yīng)時(shí)間（約為0.7s）與系統(tǒng)本身響應(yīng)時(shí)間相近，表明該雙流量EGR率測量系統(tǒng)可實(shí)現(xiàn)EGR率的實(shí)時(shí)、高精度測量。針對(duì)該系統(tǒng)存在的問題及擬解決方案進(jìn)行了探討。主題詞：EGR率 測量 雙流量計(jì) 瞬態(tài)工況Development of Dual Flow EGR Rate Measurement SystemHuang Kai1, Han Yongqiang1, Zhong Ming2, Du Wenchang2, Qin Keyin2, Yan Tao2(1. State Key Laboratory of Automobile Dynamic Simulation, Jilin University; 2. China FAW Group Corporation R&D Center)【Abstract】Dual flow real-time EGR rate measuring system is established with both Coriolis meter and laminar flow meter. The EGR rate responding characteristics have been measured and compared with the traditional CO2 tracing method under step-change operations. The measured EGR rates by dual flowmeter based system and traditional CO2 tracing system are quite consentaneous. Whats more, the responding duration of dual flowmeter based EGR rate measuring system is approximately 0.7s, indicating that the dual flowmeter based EGR rate measuring system is precision-enough and quick-responding for real-time EGR rate measuring. Problems existing in the system and proposed solution are studied in the paper.Key words：EGR rate; Measurement; Flow Meter; Transient Operation發(fā)動(dòng)機(jī)缸蓋螺栓斷裂失效分析俞雁1宋貞楨2李瑞峰3劉卓1李鈺懷1（1. 廣州汽車集團(tuán)股份有限公司汽車工程研究院；2.本田汽車（中國）有限公司；3.華測檢測技術(shù)股份有限公司上海金屬試驗(yàn)室）【摘要】為確定某發(fā)動(dòng)機(jī)缸蓋上使用的SCM435螺栓的斷裂原因，對(duì)該螺栓進(jìn)行了斷口宏觀分析、SEM電鏡分析、化學(xué)成分分析、金相組織檢查及力學(xué)性能測試。分析結(jié)果表明，螺栓材質(zhì)化學(xué)成分不符合相關(guān)要求及螺紋表面存在微裂紋是該螺栓斷裂的主要原因。針對(duì)該螺栓斷裂原因提出了相應(yīng)改進(jìn)措施。主題詞：發(fā)動(dòng)機(jī) 缸蓋螺栓失效 分析Failure Analysis of Engine Cylinder Head Bolt FractureYu Yan1, Song Zhenzhen2, Li Ruifeng3 , Liu Zhuo1 , Li Yuhuai1(1. Automotive Engineering Research Institute, Guangzhou Automobile Group Co., Ltd; 2. Honda Motors (China) Co., Ltd); 3. Shanghai Metal Lab, Centre Testing International Corporation)【Abstract】In order to identify the failure cause of SCM435 bolts used in an engine，the tests such as fracture macroscopic analysis, SEM micro-morphology analysis, chemical composition analysis, metallographic examination and mechanical properties test were carried out. The results showed that the fracture of the bolts was mainly caused by unqualified chemical composition of bolt material and the tiny crack of the surface. Corresponding improvement measure is put forward in the paper.Key words: Engine; Cylinder head bolt; Failure; Analysis汽車車身A級(jí)曲面的表示與次數(shù)選擇徐家川 李迪 李旭（山東理工大學(xué)）【摘要】分析了汽車車身在光順過程中曲線曲面的Bézier表示方法和B樣條表示方法，并對(duì)2種方法表示的曲線曲面品質(zhì)進(jìn)行了對(duì)比分析。在此基礎(chǔ)上，提出選用Bézier表示方法光順汽車車身A級(jí)曲面，同時(shí)根據(jù)高次曲線曲面的振蕩性和光順要求，將曲線曲面的次數(shù)限制在27次。試驗(yàn)表明，采用Bézier方法得到的某汽車車身曲面符合造型要求，其曲面之間的斑馬線光滑過渡，達(dá)到了A級(jí)曲面的要求。主題詞：車身，A級(jí)曲面，表示方法Representing Method and Degree Selection of Class-A surfaces for Auto-bodyXu Jiachuan, Li Di, Li Xu(Shandong University of Technology)【Abstract】Curved surface Bézier representing method and B spline representing method during auto-body smoothing are analyzed, and quality of the curved surface represented with the two methods are compared and analyzed. On this basis, it is proposed in the paper to select Bézier representing method to smoothen Class A curved surface of auto-body, meanwhile, the time of curved surface is limited to two to seven times according to the requirement of oscillation and smooth of high-degree curved surface. The test indicates that the auto-body curved surface processed with Bézier method complies with styling requirement, the zebra line smooth transition satisfies the requirement of Class A curved surface.Key words: Auto-body; Class A surfaces; Representing method16