車專業(yè)英語Unit-10-Passage-B課件

1、Unit Ten Vehicle Tests and Facilities Passage BFacilities of Vehicle Proving GroundAlmost every major auto manufacturer has its own vehicle proving ground Generally , it is a comprehensive test course It is in this place that the auto manufacturer conducts various rigorous road tests for evaluating

2、vehicles technical performances and quality correctly A typical proving ground covers an area at least of 20 million square metersIt has several different types of test tracks including a high speed oval tract, a straightaway, a rough road test area and other special test facilities, etc (see Fig.10

3、-4).High-speed oval track True to its name, high-speed oval track is a closed oval shape track about 10 km long with 4 lanes, 30 degree inclining in the bend (see Fig.10-5). Track-proven driver drives a car on the high speed oval track at high speed for verifying engine power performance, drive trai

4、n performance, ride comfort, handling stability and max speedStraightawayStraightaway is about 3 km long straight line road with 3 lanes (see Fig.10-6). The straightaway is used to verify vehicles wind resistance, fuel economy, dynamic performance and handling stabilityRough surface road test areaRo

5、ugh surface road test area generally contains Belgian brick road, cobble-stone road, washboard road, and scale road (see Fig.10-7). Due to their uneven surfaces, these rough surface roads offer a chance to test the vehicles strength and durability and its parts within a short period of time There ar

6、e also some other special test facilities available for special purposes They are low friction road, wading channel facility, winding road and ramp facilityLow friction road surface is made of materials like epoxy When sprinklers shower water on the road surface, the friction coefficient of the road

7、 become equivalent to that of roads covered by rain, snow or ice Low friction road enables to test for braking performance, anti-lock brake system (ABS) and acceleration slip regulation (ASR) on icy roads regardless of actual weather conditions (see Fig.10-8a).Wading channel facility is used for veh

8、icle wading simulation just like rainy day drive (see Fig.10-8b). Wading capability of a car is also an important indicator in measuring the car quality While a car passing the wading channel, the car testers carry out wading analysis of the testing car by watching the situation of the firewall bein

9、g washed by water flow and sealing of the doors and windows by water splashing Through the test they can make modification thereof to avoid the firewall, doors and windows water leakageWinding road test is to let a testing car travel on a winding road to analyze and assess the testing cars steering

10、performance, brake performance and curve moving lateral stability, etc (see Fig.10-8c).Ramp test facility contains different ramps in gradient and length (see Fig.10-8d).Generally, each ramp is at least 25 meters long and the gradient is respectively 20%, 25% and 30% The ramp test is only to analyze

11、 and assess the cars climbing ability, engine power performance, transmission gear ratio and loadNew Words and Expressionsmanufacturer mnjufktr n 制造商comprehensive kmprihensiv adj 綜合的rigorous rigrs adj 嚴(yán)格的, 嚴(yán)厲的; 嚴(yán)密的oval uvl adj 橢圓的; 卵形的lane lein n 車道verify verifai vt 核實(shí); 查證uneven ni: vn adj 不平坦的wadin

12、g weidi adj 涉水的ramp rmp n 斜坡, 坡道epoxy ipksi n 環(huán)氧基樹脂New Words and Expressionssprinkler sprikl n 噴水器coefficient kuifint n 系數(shù)modification mdifikein n 修改, 修正thereof erv adv 由此lateral ltrl adj 側(cè)面的, 橫向的square meter平方米Common Automobile Termsstraightaway streitwei n 直線跑道high-speedoval track高速橢圓跑道Belgian brick road比利時磚路cobble-stone road鵝卵石路washboard road搓衣板路scale road魚鱗路handling stability行駛穩(wěn)定性wadi