西北农林科技大学：《汽车拖拉机学》课程PPT教学课件（英文版，下册）Introduction

Introduction 1.Composition of Automobiles and Tractors (1)Engine (2)Chassis Transmission system:including clutch,transmission, drive axle,coupling.etc. Running system Steering system Brake system Working devices (3)Electrical equipment 机被电子工学家 Automobile and Tractor Northwest A&F University

Automobile and Tractor Northwest A&F University Introduction 1. Composition of Automobiles and Tractors (1) Engine (2) Chassis Transmission system: including clutch, transmission, drive axle ,coupling .etc. Running system Steering system Brake system Working devices (3) Electrical equipment

Introduction 2.Types of Automobiles and Tractors 2.1 Types of Automobiles Automotives can be divided into a variety of kinds by different classification methods. Classified by function:Can be divided into two categories: transport automobiles and special cars. 2.1.1 Transport automobiles (1)Car:Displacement below 1L Minicar;Displacement between 1.0 and 1.6L Compact car;Displacement between 1.6 and 2.5L -Intermediate car.Displacement between 2.5 and 4L Limousine;Displacement over 4.0L De luxe limousine. 械电子工程学 Automobile and Tractor Northwest A&F University

Automobile and Tractor Northwest A&F University Introduction 2. Types of Automobiles and Tractors 2.1 Types of Automobiles Automotives can be divided into a variety of kinds by different classification methods. Classified by function: Can be divided into two categories: transport automobiles and special cars. 2.1.1 Transport automobiles (1) Car: Displacement below 1L － Minicar; Displacement between 1.0 and 1.6L － Compact car; Displacement between 1.6 and 2.5L － Intermediate car. Displacement between 2.5 and 4L － Limousine; Displacement over 4.0L － De luxe limousine

Introduction (2)Bus:Length of 3.5m Minibus;Length between 3.5m and 7m Light bus;Length between 7m and 10m Medium bus; Length between 10m and 12m Motorbus;length greater than12m or double-deck coach length between 10m and12m extended bus. (3)Truck:Total mass less than 1.8t -Mini truck;Total mass between 1.8t and 6t Light truck;Total mass between 6t and 14t medium truck;Total mass greater than 14t Heavy-duty goods vehicle (4)Towing vehicle Exclusively or mainly used to tow trailers. 2.1.2 Special car:Design or modification cars according to special requirements.Notably used to complete the work other than transportation. 机被电子工程学膜 Automobile and Tractor Northwest A&F University

Automobile and Tractor Northwest A&F University Introduction (2) Bus: Length of 3.5m － Minibus; Length between 3.5m and 7m － Light bus; Length between 7m and 10m － Medium bus; Length between 10m and 12m － Motorbus; length greater than12m or double-deck coach length between 10m and12m － extended bus. (3) Truck: Total mass less than 1.8t － Mini truck; Total mass between 1.8t and 6t － Light truck; Total mass between 6t and 14t － medium truck; Total mass greater than 14t － Heavy-duty goods vehicle . (4) Towing vehicle : Exclusively or mainly used to tow trailers. 2.1.2 Special car: Design or modification cars according to special requirements. Notably used to complete the work other than transportation

Introduction (1)Recreational Vehicle:such as tourism vehicles and beach-play- automobiles. (2)Racing car (3)Special purpose vehicle:sanitation vehicles,ambulances and fire engines. Classified by types of power: (1)Internal combustion engine vehicle (2)Electric vehicle 机械电子工程学 Automobile and Tractor Northwest A&F University

Automobile and Tractor Northwest A&F University Introduction (1) Recreational Vehicle: such as tourism vehicles and beach-play￾automobiles. (2) Racing car (3)Special purpose vehicle: sanitation vehicles, ambulances and fire engines. Classified by types of power : (1) Internal combustion engine vehicle (2) Electric vehicle

Introduction Classified by the adaptability of road conditions: (1)Highway vehicle (2)Cross-country vehicle 2.2 Types of Tractors Classified by function:mainly divided into three categories: industrial,forestry and agricultural tractors. Agricultural tractors can be divided into: (1)General Tractor (2)Garden tractor (3)Intertillage tractor (4)Special tractor 机被与电子工程保 Automobile and Tractor Northwest A&F University

Automobile and Tractor Northwest A&F University Introduction Classified by the adaptability of road conditions: (1) Highway vehicle (2) Cross-country vehicle 2.2 Types of Tractors Classified by function: mainly divided into three categories: industrial, forestry and agricultural tractors. Agricultural tractors can be divided into: (1) General Tractor (2) Garden tractor (3) Intertillage tractor (4) Special tractor

Introduction Classified by running gear: (1)Crawler tractor (2)Wheeled tractor (3)Hand tractor (4)Ship type tractor Classified by the watt level: Greater than 100 horsepower-Large sized tractor; Between 20 and 100 horsepower-Medium sized tractor; Less than 20 horsepower-Small tractors. 械电子工程学酸 Automobile and Tractor Northwest A&F University

Automobile and Tractor Northwest A&F University Introduction Classified by running gear: (1) Crawler tractor (2) Wheeled tractor (3) Hand tractor (4) Ship type tractor Classified by the watt level: Greater than 100 horsepower — Large sized tractor; Between 20 and 100 horsepower — Medium sized tractor; Less than 20 horsepower — Small tractors

Introduction 3.Models of Domestic Automobiles and Tractors (1)Automobile model:including three parts:the head,middle and the tail. Head Middle Tail Catalog numbers of special cars and enterprise custom codes.The front part is letters,and the rear part can be letters or numbers. Product serial number,expressed by a number,and usually is the serial number of improvements The code of vehicles'principal characters,expressed by two numbers The vehicles'category codes,expressed by a number Code of company name,expressed by two to three letters Figure 0-1 Meanings of numbers and letters in automobile models 机被与电子工程学原 Automobile and Tractor Northwest A&F University

Automobile and Tractor Northwest A&F University Introduction 3. Models of Domestic Automobiles and Tractors (1) Automobile model: including three parts: the head, middle and the tail. Catalog numbers of special cars and enterprise custom codes. The front part is letters, and the rear part can be letters or numbers. Product serial number, expressed by a number, and usually is the serial number of improvements The code of vehicles’ principal characters, expressed by two numbers The vehicles’ category codes, expressed by a number Code of company name, expressed by two to three letters Head Middle Tail Figure 0-1 Meanings of numbers and letters in automobile models

Introduction (2)Tractor model:composed by the series code,power code,type code,function code and distinctive marking. The display order of them as follows: Distinctive marking Function code Type code -Power code Series code Figure 0-2 Meanings of numbers and letters in tractor models Automobile and Tractor Northwest A&F University

Automobile and Tractor Northwest A&F University Introduction (2) Tractor model: composed by the series code, power code, type code, function code and distinctive marking. The display order of them as follows: Distinctive marking Function code Type code Power code Series code Figure 0-2 Meanings of numbers and letters in tractor models

Introduction (3)Four-wheel farm transporter model Structural feature code,expressed by one to three letters. Loading capacity code,expressed by two numbers. Power code,expressed by two numbers. Company or brand code,expressed by two to three letters. Figure 0-3 Meanings of numbers and letters in four-wheel farm transporter models Automobile and Tractor Northwest A&F University

Automobile and Tractor Northwest A&F University Introduction (3) Four-wheel farm transporter model Structural feature code, expressed by one to three letters. Loading capacity code, expressed by two numbers. Power code, expressed by two numbers. Company or brand code, expressed by two to three letters. Figure 0-3 Meanings of numbers and letters in four-wheel farm transporter models

Introduction (4)Tri-wheel vehicle model The principal character code,expressed by three numbers. Feature code,expressed by three capital letters. The category code.For tri-wheel vehicle,it is 7Y. Company code,expressed by two to three Chinese characters. Figure 0-4 Meanings of numbers and letters in tri-wheel vehicle models 械电子工程学度 Automobile and Tractor Northwest A&F University

Automobile and Tractor Northwest A&F University Introduction (4) Tri-wheel vehicle model The principal character code, expressed by three numbers. Feature code, expressed by three capital letters. The category code. For tri-wheel vehicle, it is 7Y. Company code, expressed by two to three Chinese characters. Figure 0-4 Meanings of numbers and letters in tri-wheel vehicle models