本文選題：傳動系 + 阻力測試�。� 參考：《山東大學(xué)》2017年碩士論文

【摘要】：汽車傳動系參數(shù)是決定汽車動力性和經(jīng)濟(jì)性的關(guān)鍵,功率損失是衡量傳動系統(tǒng)的一項重要技術(shù)指標(biāo),功率損失直接影響汽車整體效率、油耗和傳動系統(tǒng)運轉(zhuǎn)的穩(wěn)定性,傳動系統(tǒng)的功率損耗是汽車傳動系統(tǒng)所受阻力的表現(xiàn),本文首先在分析了小型面包車動力性檢測的基本理論的基礎(chǔ)上,選擇了兩種典型的小型面包車為試驗車輛,分別進(jìn)行了臺架測試,通過對比測試結(jié)果,發(fā)現(xiàn)實驗車與對標(biāo)車存在較大的差距,通過對兩種車輛傳動系統(tǒng)的關(guān)鍵特性進(jìn)行差異性分析,找出兩種車輛傳動系統(tǒng)特性的差異點,然后對產(chǎn)生差異的傳動系主要部件進(jìn)行改進(jìn)研究,最后通過對改進(jìn)前后整車性能的對比分析,驗證了改進(jìn)的有效性和實用性,相關(guān)結(jié)論可為提高小型面包車傳動效率提供參考。本文主要研究內(nèi)容如下:1.本文分析了小型面包車在正常行駛工況下所承受的外部阻力和內(nèi)部阻力;構(gòu)建了傳動系統(tǒng)中主要部件的功損模型,分別分析了軸承與齒輪組嚙合的功損。2.設(shè)計了傳動系統(tǒng)能耗測試的方法:分別選取冷態(tài)、熱態(tài)和磨合三種測試工況,在底盤測功機上使用轉(zhuǎn)鼓驅(qū)動測試傳動系阻力;選取了同級別的對標(biāo)車型,并設(shè)置了合理的逐級拆解傳動系統(tǒng)總成對比測試方案。3.利用目標(biāo)車型與對標(biāo)車型在不同工況下的阻力測試結(jié)果,發(fā)現(xiàn)在整車、拆蹄片以及斷軸之后測得樣車的阻力值均高于對標(biāo)車型,說明樣車的傳動效率有巨大的提升空間,為目標(biāo)車型明確了降阻方向。4.改進(jìn)了小型面包車變速箱和后橋主要零部件特性。對試驗車變速箱齒輪、軸承、潤滑油、后橋加工形位公差和半軸游隙進(jìn)行改進(jìn)和試驗,得到了優(yōu)化的零部件精度和參數(shù)數(shù)據(jù)。
[Abstract]:The parameters of the automobile transmission system are the key to determine the power and economy of the vehicle, and the power loss is an important technical index to measure the transmission system. The power loss directly affects the overall efficiency, fuel consumption and the stability of the transmission system. The power loss of the transmission system is the manifestation of the resistance of the automobile transmission system. Firstly, on the basis of analyzing the basic theory of the dynamic performance test of the minivan, two typical minivan are selected as the test vehicle. By comparing the test results, it is found that there is a big gap between the test vehicle and the contrasted vehicle. By analyzing the key characteristics of the two kinds of vehicle transmission system, we find out the difference points between the two kinds of vehicle transmission system characteristics. Then the improvement of the main parts of the differential transmission system is studied. Finally, the effectiveness and practicability of the improvement are verified by comparing the performance of the whole vehicle before and after the improvement. The relevant conclusions can provide a reference for improving the transmission efficiency of the minivan. The main contents of this paper are as follows: 1. In this paper, the external and internal resistance of minivan under normal driving condition is analyzed, the power loss model of main parts in transmission system is constructed, and the power loss of bearing and gear group meshing is analyzed respectively. The test method of energy consumption of transmission system is designed: selecting three test conditions of cold, hot and running-in, using drum drive to test the resistance of transmission system on chassis dynamometer, selecting the same level of standard vehicle, And has set up the reasonable step-by-step disassemblage transmission system assembly contrast test plan. 3. Based on the results of the resistance test of the target type and the standard type under different working conditions, it is found that the resistance value of the prototype is higher than that of the standard type after the whole vehicle, the removal of the hoof and the broken shaft, which indicates that the transmission efficiency of the prototype has a huge lifting space. The resistance reduction direction. 4. 4 was defined for the target vehicle model. The characteristics of main parts of gearbox and rear axle of minivan are improved. The gear of gearbox, bearing, lubricating oil, rear axle machining form tolerance and half shaft clearance were improved and tested, and the optimized parts precision and parameter data were obtained.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：D631.5

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