新编汽车专业英语第3版黄汽驰电子课件Unit10PassageA.pptx

Unit Ten　 Vehicle Tests and Facilities;Passage AKinds of Vehicle Tests;Vehicle test must use specialized equipment, the laboratory and the specialized vehicle proving grounds． The major aims of vehicle test are to evaluate the car performance, find out its defects and weak links in order to further research and put forward improving implement to improve the vehicle performance．;Vehicle tests are classified in accordance with test purpose, test object and test site． According to the test purpose, vehicle tests are divided into quality test, new product test and scientific research test． Quality test is to evaluate the car’s quality, find out existing problems in time and make sure the quality control．;New product test is to assess whether the new developed product accords with the designed requirements before the new developed cars are put into mass production． Scientific research test is a series of activities to promote the technology advance for vehicles． According to the test object, vehicle tests are divided into complete vehicle test, assembly test and component test．;Complete vehicle test is to assess the main technical performances of a vehicle, such as dynamic property, fuel economy, ride comfort, maneuverability, stability and traffic ability． Assembly test is mainly to assess the operating performance and durability of each assembly in a vehicle, such as engine power, transmission efficiency and suspension unit．;Component test is to determine main components for their reasonable structure and design and measure their rigidity, strength and durability and service lifetime． According to the test site, vehicle tests are divided into indoor bench test, outdoor road test and proving ground test．;Indoor bench test (see Fig.10-1) is carried on in a room equipped with a specialized test bench, on which a complete vehicle is put to have a road simulation test． Through the road simulation, some parameters from the test bench are precisely controlled in order to