汽车发动机英语_汽车发动机英语翻译怎么写

1.汽车发动机修复剂用英语怎么说

2.求：汽车专业英语词汇大全 ，越全越好

3.求关于发动机的英文文献及其翻译 用于毕业论文。急~~

4.turbo是什么意思

5.车上英文按键都是什么意思

6.毕业论文英语翻译，自动化仓库或立体车库方面

他的汽车发动机出毛病了

His car engine is out of order.

他的汽车发动机出毛病了

His car engine is out of order.

汽车发动机修复剂用英语怎么说

进气门 :

1. intake valve

. . . 汽车构造词汇 ...

飞轮 flywheel

进气门 intake valve

排气门 exhaust valve ...

求：汽车专业英语词汇大全 ，越全越好

汽车发动机修复剂

翻译成英文是：the repair agent of automobile engine

相关短语：

repair agent

网络 修补剂;

[例句]This?paper?briefly?introduces?the?repair?mechanism?of?polymer?alloy?repair agent?and?concrete?repairing?technique.?

本文简要介绍了高分子合金修补剂的修补机理及具体修补技术。

求关于发动机的英文文献及其翻译 用于毕业论文。急~~

尽量为您列举：

Static balance 静平衡；

Static pressure 静压力；

Stator 定子，（液力变矩器的）导轮；

Steering axis inclination (SAI) 转向轴线内倾；

Stellite 钨铬钴合金，硬合金；

Step-up transformer 升压变压器；

Stoichiometric 化学当量的，化学计算的；

Stress 压力；

Stroke 冲程；

Strut 滑柱；

Substrate （催化转化器的）载体；

Suction 吸入，真空度；

Sulfation 硫化现象；

Tracking 追迹行驶（顺前车旧辙行驶）；

Traction 牵引力，附着力，抓地力；

Traction motor （电动汽车的）牵引电动机；

Tractive effort 牵引力；

Tramp （汽车同一车桥左、右两个车轮）反向跳振；

Transaxle 变速驱动桥；

Transfer case 分动器；

Transistor晶体管，三极管；

Transverse 横向的；

Trouble codes 故障码；

Turbo boost 废气涡轮增压；

Turbocharger 涡轮增压器；

Turbulence 紊流；

Turning torque 旋转转矩；

Two-mode hybrid system 双模式混合动力系统；

Ultracapacitors 电容器；

Ultrasonic cleaning 超声波清洗；

Undersquare亚方型发动机（冲程缸径比大于1的发动机）；

Universal joint 万向节；

Urea 尿素；

Vacuum 真空；

Valve 气门；

Valve body 阀体；

Valve lifter 气门挺柱；

Valve seat 气门座；

Valve spring 气门弹簧；

Vapor 水蒸气，蒸发；

Vapor lock 气阻；

Variable nozzle turbine turbocharger (VNT) 可变（截面）喷嘴涡轮增压器；

Variable-rate coil spring 变刚度弹簧；

Variable resistor 可变电阻；

Variable valve timing (VVT) 可变气门正时；

掌握汽车专业英语词汇的用处：

学习汽车专业英语的用处主要是在汽车外企工作时，和别人进行交流。对自己的发展有重要的意义和帮助。

汽车专业是一个非常大的概念，主要包括：汽车服务工程，汽车销售与评估，汽车检测与维修，汽车商务管理等学科，基本是围绕汽车行业研发，制造，销售，售后服务这些过程都是汽车专业所包含的内容。

turbo是什么意思

Motor

vehicle suspension on the vehicle suspension system is a very important system.

Not only does it affect the comfort of the car (ride), but also to other

properties such as the adoption, as well as the stability of the attachment

he a significant impact on performance, each of the suspension by the elastic

components (buffers), body-oriented (from Chuan And stabilizing role), as well

as shock absorbers (from the role of shock absorption). However, not all of the

suspension must he three components. As long as we can play to the role of

the three.

Vehiclemaintenance for the conservation network 1, flying the classification

1.

Non-independent suspension: on both sides of the wheel mounted on a

total-vehicle-bridge, the train-bridge to fly through the frame and connected.

This suspension structure is simple and reliable power-but by two rounds of

shock and vibration affecting each other. But also because of the quality of

flying non-serious suspension of the poor performance of the buffer, the vibration

of a moving car, the greater the impact. The suspension generally used for

trucks, buses and a number of other ordinary vehicles. (2) independent

suspension: each individual through a set of wheels mounted on the body or

suspension of vehicular bridge, the use of off-Axle, in the middle of a fixed

frame or body; such wheel on both sides of the suspension by the shock

Hubuyingxiang, but due to non-flying than by the quality; buffer with a strong

shock absorption capacity, ride comfort. The indicators are better than

non-independent suspension, but the complex structure of the suspension, but it

also drive axle, steering system has become complicated. The use of such

suspension of the following two categories of vehicles. Cars, buses and

passenger vehicles. Can be improved ride comfort, and high speed when driving

the car to improve stability.

Off-road vehicles, military vehicles and

mining vehicles. In a bad way and he no say under the circumstances, we can

make sure all the wheels on the ground and contacts to enhance stability and

driving the car attached, to play a speed of the car.

2.Flexible

yuan for the type of (1) of the leaf spring: the long-range multi-chip and

curvature ranging from the composite plate. After installed at both ends of the

natural upward curve. In addition to the leaf spring with a buffer, there is a

certain degree of shock absorption, vertical layout also has a force-oriented,

non-independent suspension using most of the leaf spring so flexible

components, se-oriented devices and shock absorbers, simple structure . (2)

of the coil spring: only a cushion for the multi-car independent suspension. In

the absence of damping force and mass functions must also be equipped with

special shock absorbers and device-oriented. (3) oil and gas spring: a flexible

medium as a gas, liquid as a medium-power, which not only has a good buffer

capacity, also has a role in shock absorption and at the same time frame of a

high degree of regulation may also be licable to the use of hey vehicles and

buses. (4), torsion bar springs; will be made under the torsion bar springs

fixed at one end of the frame, on the other side through the arm and connected

to the wheels, and beat at wheel torsion bar the use of reverse deformation

played the role of buffer, is suitable for independent The use of suspension.

3.

the use of shock absorber tube shock absorbers, the use of oil in the small

role to cut energy consumption vibration. Shock absorber and the upper body

frame or connected with the lower end of the train-bridge connected. Most of

the trip can be done and the compression of the dual role of the role of shock

absorber.

4.device-oriented:

the flexibility in the independent suspension components, most of them can only

transfer the vertical loads and can not transmit vertical and horizontal, must

be a separate device-oriented. As noted, under the arm and vertical, horizontal

stabilizer, and so on.

5.

non-independent suspension: before and after the truckswere non-independent

suspension bridge, some vehicles such as buses and cars and so on, after the

bridge is also a non-independent suspension. Each car of the sedan chair by

hoisting two independent non-vertical arrangement of the composition of the

leaf spring. Leaf spring fixed in the middle of the train-bridge, with the

front end hinged frame or body, the back-end with the frame or body through the

ear hanging hinged or connected to use of skateboards. Top of the frame with a

shock absorber then, with the lower end of the next school Axle. The truck rear

axle and more without shock absorbers.

6.

many types of independent suspension, coil spring as the use of flexible

components. Torsion bar springs for the independent suspension is also divided

into vertical and horizontal torsion torque Cup two-under. Although many of the

advantages of an independent suspension, but the car would turn the system, the

Department of driving and driving more complicated structure of the bridge.

Keywords:

structure of the engine engine performance merits of a direct impact on the

performance of motor vehicles.

First, the use of fuel by the different

categories according to engine fuel, gasoline engine and the engine is divided

into two major categories of diesel engines.

1

.network Motor conservation maintenance, gasoline engine small size, light

weight, low prices; good start, when the maximum power of high-speed;work in a

small vibration and noise; suitable for small and medium-sized car in

particular, the use of high-speed car.Gasoline deflagration due to the restrictions

can not be too high compression ratio, thermal efficiency and economy are not,

such as diesel. Gasoline is a mixture of the main gas pipeline in the form over

into the cylinder, compressed by the end of close to the spark plugs fire. The

driver to speed up the adoption of the control pedal into the cylinder of the

gas mixture to control the load on the engine, known as the volume of

regulation. Gasoline engine’s fuel supply system and ignition system is a gasoline engine

failure on the part of a higher proportion. Gasoline engine emissions of

harmful material composition of carbon monoxide, carbon compounds and nitrogen

oxides than diesel, and so on, but with the current electronically controlled

fuel injection system and other exhaust gas purification devices, which he

greatly improved. In addition, the gasoline engine’s

torque characteristics are very suitable for automotive use, can significantly

reduce the labor intensity of the driver.

2.

diesel and gasoline engine, diesel engine size, weight, high prices, poor start

(especially when the low temperature); work more vibration and noise; easy to

overload when the black smoke. Diesel is characterized by:

1)

the absence of the deflagration, as well as restrictions on the needs of the

spontaneous combustion of diesel, diesel engine compression ratio high. Thermal

efficiency and economy must be better than the gasoline engine.

2)

the same power, the diesel engine’s torque, maximum power at the time of low speed, suitable for the

use of the truck.

3)

is a mixture of diesel engine cylinder internal form, no inlet throttle, the

intake of small resistance. The driver to speed up the adoption of fuel

injection control board, to change the engine load, known as the regulation of

quality, as there is no problem of hypoxia, emissions of hydrocarbons and

carbon monoxide content of less than gasoline.

4)

In the absence of the ignition system, as well as fuel supply device failure

rate low. Therefore, failure to less than diesel gasoline engine.

5)

diesel engine torque characteristics are not suitable for car driving cycle

needs, moving the stalls to use frequently, an increase of pilot labor

intensity. The main diesel engine for use in medium and hey vehicles.

Second, the number of engine cylinder and

arrangement of the engine cylinder displacement equal to the volume of work

and.

Increase

in the number of cylinder engine will not only increase capacity, improve the

engine output power, but also to enable the smooth operation of the engine to

reduce noise and vibration. Hyundai Motor he adopted multi-cylinder engine.

Mini-car for more than 3-cylinder engine, small trucks, passenger cars and

medium-sized following for more than 4-cylinder engine; medium-sized trucks,

large cars and buses for more than 6-cylinder engine; Hey-Duty Truck General

of 6-8 cylinder. 6-cylinder engine under a single row multi-cylinder in-line

mode; 8-cylinder V-type engines for alignment; some of the cars in order to

reduce engine height, length shortened, using V6, V8-type arrangement. Mini-car

use of 3-cylinder engine, most oblique way. In-line engine structure is simple

and cheap. The disadvantage is that a high degree of the engine higher longer

length.Is more a way. V-type engines with low height, short length, but the

structure of the complex, more expensive price, suitable for large-scale

engine. Water-cooled engine block using the whole cast. Small engines used

aluminum alloy materials, large-scale multi-engine for the cast iron. Cylinder

head bolts used in a fixed block on the plane, in addition to constitute a

closed cylinder combustion room, into the exhaust, valves are installed, and

spark plug valve, and so on.

Third,

the gasoline engine’s

fuel supply 1, the fuel-supply system carburetor gasoline engine fuel supply

line into carburetor and fuel-injection two major categories of carburetor main

oil installations operating principle is:

the work of the engine when the outside air In

the cylinder under the suction air filter to filter through into the cylinder.

When the air flow through the pipe section due to the smaller increase in the

velocity and pressure led to the decline in a certain vacuum. Float on the

interior of gasoline in the vacuum from the role of the main inlet into the

spray nozzle, the gas emitted by high-speed air currents disperse into mist,

known as fogging. And then to oil and oil-film evaporation space in the form of

evaporation, and the airway had mixed into the air mixture into the cylinder.

In order to achieve the economy, the main oil loading also uses the air brake.

The main nozzle at the indoor air, and along with a few scheduled to open

around the through-hole and air the same room. When the throttle opening

gradually increases, the air hole gradually connected with the air. Not only

reduces the vacuum so that the mixture-thinning, the main air nozzle is also

beneficial to the atomization of gasoline. 2. electronically controlled fuel

injection fuel-supply system carburetor fuel-supply device structure is simple,

reliable, cheap, easy maintenance. But the biggest drawback is that it can not

be precisely controlled mixture of concentration, resulting in incomplete

combustion, emissions of harmful ingredients, do not meet the stringent

requirements of environmental protection today. In addition, due to the

existence of the pipe so that the air resistance increases. There is also the

cylinder uneven distribution of gasoline and easy to produce and Qizu ice and

so on. In order to solve these problems, 80 electronically controlled fuel

injection system in the car engine on a wide range of lications more and

more.

electronically

controlled fuel injection system advantages: electronically controlled fuel

injection system (referred to as English EFI) has the following advantages:

1.

no matter under what conditions and in what conditions the engine can

accurately control the mixture of concentration, To make gasoline burn

completely full. This greatly reduces the emission of harmful components of

content, also has an excellent combustion engine of the economy.

2.

can supply, ignition temperature, such as centralized control, so that the work

of the engine performance, increased engine power output, lower fuel

consumption.

3.

the engine can always operate in a stable condition in a variety of conditions

so that all car drivers in accordance with the requirements of normal traffic.

4. In the absence of pipes, a small air

resistance. At the same time, difficult to produce Qizu, to the distribution of

gas cylinder uniform, and so on. The shortcomings of the fuel injection system

is the high cost structure of the complex and difficult to repair, and so on.

electronicallycontrolled fuel injection system of classification:

1) by way of testing the air quality into theway traffic density and speed of the way the two categories.

2) by way of fuel injection, the following two

categories. According to the location of the jet, into intake manifold junction

(SPI) and the jet intake manifold Department (MPI) are two jet, respectively,

also known as single-point and multi-point injection jet.

MPI is

currently widely used in the way.MPI is currently widely used in the

way. Department of gasoline ignition gasoline engine ignition system are

generally three categories: contact-type ignition system, electronic ignition

system, computer-controlled ignition system.

车辆悬架系统中的机动车辆悬架系统是一种非常重要的系统。它不仅对乘坐汽车的舒适度有影响，而且对附件的稳定性等其他性能有着显著的影响。每个悬挂的弹性元件(弹簧),是车架(起稳定作用)， 以及减振器的角色(减震)组成然而,并非所有的悬架必须有三个组成部分。只要我们能发挥三个作用。汽车的维护，悬架分类：

一 非独立悬架：两侧车轮安装在一根整体式车桥上，车轮连同车桥一起通过框架与车身相连。但这种悬架结构简单，可靠，制造方便，而是由两个轮冲击和振动轮互相影响。在载重汽车上被广泛应用。 但减震器的表现不佳，汽车行进中的震动越大，影响越严重，所以这种悬挂通常被用在卡车、客车和其他的普通车辆。

独立悬架:每个元件通过两侧车轮安装或悬挂在车架上，并且用断开式车桥。安装了这种减震系统的车轮不易失重飞起，具有强大减震能力的缓冲器更是提供了舒适的乘驾感受。若一侧车轮相对于车架(或车身)的位置发生变化时，另一侧车轮不受影响。这种悬架结构复杂，且车身的平稳性和高速行驶的稳定性较好，因此在轿车和小客车上得到普遍用。以上指标均优于非独立悬架，但是悬架的结构越复杂，驱动桥和转向系统也就越复杂。使用这种悬架的交通工有以下两种：

1汽车和客车等客运车辆：可以提高乘驾舒适度，并且当高速驾驶时能提高稳定性。

mining vehicles.越野车，军用车和矿车。在路况不佳时，可以确保所有的车轮接触地面并提高稳定性，避免汽车起伏，发挥出汽车的速度。

二.弹性元件类型：1 钢板弹簧：它是由若干片长方形的钢板组合成的复合板，呈弯曲形。安装在自然向上的曲线两端。此外,钢板弹簧通过减震器起到某种程度的减震、传递垂直载荷的作用。在非独立悬架和导向机构中，也使用钢板弹簧这种弹性元件和减震器这样简单的结构。

2螺旋弹簧；只为多汽车独立悬架缓冲，在缺少阻尼力和质量职能的情况下，还必须具备特殊的减震器和导向装置。

3油气弹簧: 使用油液和高压气体作为弹性材料，不仅有很好的减震能力，可以吸收冲击。在同样情况下能够提供更好的调节作用，适用于重型车辆和客车。

4扭杆弹簧：汽车车架与车轮用扭杆弹簧，其一端固定在车架上而另一端与车轮连接，车轮上下跳动时扭杆产生扭转变形，靠扭转弹力来吸收振动能量适合独立悬架系统。

三.减震器减震筒的使用，油的使用可以切断震动造成的能里损耗。减震器上端与车底架相连，下端与车桥相连。减震器在大部分的行程可以起到压缩的双重作用

四.导向机构：独立悬架的弹性元件，大多数只能传递垂直载荷，并不能传递水平载荷，必须是分离的导向机构。如上所述，在力臂和垂直和水平稳定器等。

五.非独立悬架：非独立悬架位于卡车的前部和后部，像客车，汽车等一些车辆的后桥也是非独立悬架。每个轿车均由两个独立的非垂直的钢板弹簧构成。钢板弹簧固定在车桥中间,其前后端车架或车身通过耳朵悬铰链或使用滑板连接的。上面的框架用减振器的下端连接轴。车后桥一般无减震器。

六 .螺旋弹簧作为弹性元件被用在多种类型的独立悬架。 扭杆弹簧

torque Cup two-under.为独立悬架分成纵向和横向扭力矩杯两杆。 虽然独立悬架具有许多优点，但汽车将会通过更复杂的桥结构改进系统，驱动和驾驶。

关键词：发动机的结构发动机的性能对机动车辆的性能有着直接的影响。

首先，燃料使用不同类别根据发动机的燃料，分为汽油发动机和柴油发动机。

1网络汽车养护维修，汽油发动机体积小，重量轻，价格低；当最大速度运行是，启动好；运行时震动小，噪音小，适合小型和中型汽车，尤其是高速车。由于爆燃的限制，汽油机不可以有过高的压缩比，热效率，而且不如柴油经济。汽油是一种进入气缸中的主要气体管道的混合物，在压缩到接近底部的火花塞时点火。驾驶者加速踩油门时混合气体进入气缸来控制发动机的负载，这是常规。汽油发动机的燃料供给系统和点火系统是发生汽油发动机故障的比例较高的一部分。虽然汽油发动机比柴油排放更多的一氧化碳，碳化合物和氮氧化物等有害物质成分，但是,现在的电控燃油喷射系统和其他废气净化装置却有了很大的改善。但与目前的电控燃油喷射系统和其他尾气净化装置，极大地改善。此外，汽油发动机的扭矩特性非常适用于汽车，可以大大降低司机的劳动强度。

2柴油发动机和汽油发动机，柴油发动机的大小，重量，价格高，启动差（尤其是低温时），运行时震动和噪音大; 有黑烟，容易超负荷。柴油发动机机的特点是：

1）没有爆燃的限制，但柴油需要自燃，所以柴油发动机压缩比很高。 .热效率和经济性比汽油发动机更好。

2）柴油发动机适用于卡车，因为同样的功率，扭矩大，最大功率也大。

3）柴油发动机汽缸内的内部是的混合物，没有进油门，小阻力的进气管。 司机.司机加快用燃油喷射控制板，通过改变发动机负荷，作为规管的质量，因为不存在缺氧问题，碳氢化合物和一氧化碳的排放量低于汽油。

4）由于没有点火系统，燃料供应设备故障率低。 因此，不低于汽油发动机。

5）柴油发动机扭矩特性并不适用于汽车驾驶循环的需求，移动的摊位，经常使用，是适合飞行员劳动强度的增加。主要适用于中型和重型车辆。

第二，发动机缸体及发动机缸体位移量相等的工作。

因此，增加汽缸发动机的数量，不仅能增加容量，提高发动机输出功率，而且能够使发动机顺利运作，以减少噪音和振动。现代汽车公司已用多缸发动机。微型车超过3缸发动机，小卡车，客车和中型以下超过4缸发动机;中型卡车，大型轿车和客车超过6缸发动机;重型卡车一般6-8缸。6缸下单列多缸模式下，8缸V型直列发动机，有些的汽车，为减少发动机的高度，将长度缩短，安装使用V6发动机，V8发动机类型。微型汽车使用3缸发动机，大多是倾斜的。 .在直列发动机结构简单，便宜。 .缺点是，发动机的高度更高，长度更长。更是一个方式。

.V型发动机高度低，长度短，但其结构复杂，价格更昂贵，适用于大型发动机。

.水冷式发动机缸体用整体铸造。小型发动机用铝合金材料，而大型发动机多用铸铁材料。

and so on.气缸盖螺栓是用在飞机上的固定块，除了构成一个封闭的汽缸燃烧室，进入排气管，阀门和火花塞等。

第三，汽油发动机的燃料供应1，燃料供应系统汽化器

汽油发动机燃料进入汽化器和燃油喷射器两种主要设备工作原理：

发动机工作时，外界空气被吸入空气过滤器，通过过滤器进入气缸。当空气流过管道部分由于较小的增长速度及压力的减少导致了真空。

车上英文按键都是什么意思

turbo：n 涡轮增压机

例句：

a?motor?vehicle?equipped?with?a?turbocharger.涡轮增压发动机汽车

英语：

英语（English）是印欧语系-日耳曼语族下的语言，由26个字母组合而成，英文字母渊源于拉丁字母，拉丁字母渊源于希腊字母，而希腊字母则是由腓尼基字母演变而来的。英语是国际指定的官方语言（作为母语），也是世界上最广泛的第一语言，英语包含约49万词，外加技术名词约30万个，是词汇最多的语言，也是欧盟以及许多国际组织以及英联邦国家的官方语言，拥有世界第三位的母语使用者人数，仅次于汉语和西班牙语母语使用者人数。

英语由古代从丹麦等斯堪的纳维亚半岛以及德国、荷兰及周边移民至不列颠群岛的盎格鲁、撒克逊以及朱特部落的白人所说的语言演变而来，并通过英国的殖民活动传播到了世界各地。由于在历史上曾和多种民族语言接触，它的词汇从一元变为多元，语法从“多屈折”变为“少屈折”，语音也发生了规律性的变化。在19至20世纪，英国以及美国在文化、经济、军事、政治和科学在世界上的领先地位使得英语成为一种国际语言。如今，许多国际场合都使用英语做为沟通媒介。

毕业论文英语翻译，自动化仓库或立体车库方面

汽车上的常用钥匙用英语解释如下：

1.主键：

l:左—左，r:右—右，分别代表左右后视镜。调整后视镜，然后启动汽车。无钥匙启动汽车将有一个发动机启动停止。

发动机：发动机就是发动机；启动：启动，即启动发动机；停止：停止，即停止发动机。

p:park——停车还是停车；r:反向-反向；n:Neutre—中性，代表中性；d:司机——开车，往前走；m:手动-手动；l:低—低速，S:Sport—运动，挂这个挡，油门更灵敏，变速箱降挡更快，转速更高。

2.多媒体键：

电台：广播站；媒体：媒体是多媒体的集合；菜单：Menu，汽车内部控制的主界面；返回：返回上一个界面；或者NAVI:导航；A/C:空控即空调；Max:最大值；Auto:自动，在汽车的很多方面都有使用。自动按钮是一个非常方便的按钮。

3.省油按钮：

ECO:简单来说就是省油模式，有些新能源车也可能是混动模式。舒适性：舒适性，运动性：只是车更强而已。

百万购车补贴

Car parts

Engine

The engine is a power plant, which provides power to drive the automobile．

In most automobile engines，the explosive power of the mixture of air and gasoline drives the pistons．The pistons turn a crankshaft to which they are attached The rotating force of the crankshaft makes the automobile’s wheels turn．

Some automobiles are powered by another kind of engine，known as the rotary valve，rotating combustion engine or Wankel engine The rotary valve engine also draws in a mixture of air and fuel, which is then compressed and burnt．A motor revolving in an elliptical chamber is connected to a shaft，Which finally drives the rear wheels．In most automobiles．the engine is mounted at the front end of the car，with the clutch and gearbox immediately behind it；the engine, clutch and gearbox are assembled into a single unit

A number of systems are necessary to make an engine work . A lubrication system is needed

to reduce friction and prevent engine wear. A cooling system is required to keep the engine’s temperature within safe limits .The engine must be provided with the correct amount of air and fuel by a fuel system．

The mixture of air and fuel must be ignited inside the cylinder at just the right time by an ignition system．Finally, an electrical system is required to operate the cranking motor that starts the engine and to provide electrical energy to power engine accessories

Lubrication System

An engine has many moving parts which eventually develop wear，as they move against each other．The engine circulates oil between these moving parts to prevent the metal-to-metal contact that results in wear． Parts that are oiled can move more easily with less friction and hence power loss due to friction is minimized．The secondary function of lubricant is to act as a coolant and also as a sealing medium to prevent leakages．Finally，a film of lubricant on the cylinder walls helps the tings in sealing and thus improves the engine’s compressions．

汽车部件

发动机

发动机是一种动力机械设备．它为汽车提供动力。

在大部分汽车发动机中．空气和汽油的混合气体产生的爆炸性能量驱动活动活塞运动。活塞使它们所连接的曲轴转动。曲轴的转动力量使汽车的车轮转动。

一些汽车是由另外一种发动机提供动力的，这种发动机被认为是旋转气门、旋转燃烧或汪克尔发动机。转子发动机也是吸入空气和燃料的混合气，混合气被压缩和燃烧?在一个椭圆形的室内旋转的发动机连接着一个轴，这个轴将最终驱动后面的车轮。大部分汽车中，发动机是架在汽车的前面末端的，离台器和变速箱在它后面，发动帆、离台器和变速箱被装配成一个整体。

发动机工作时有很多系统都是必要的。润滑系统可以减少摩擦并减轻发动机磨损。冷却系统被用来保持发动机的温度在安全范围内。发动机必须有燃油系统保证适当数量的空气和燃料供给。

空气和燃油混合物必须由点火系统在适当的时间在气缸内被点燃。最后，电子系统被用来控制启动发动机用的电动机和为发动机附件提供电能。

润滑系统

发动机有许多最终会被磨损的运动部件，因为它们是相对运动的。发动机使润滑油在这些运动的部件间循环，以避免因金属与金属之间的接触而导致磨损。被润滑过的部件能够因为摩擦减少而容易运动，因摩擦导致的能量损失是最小的。润滑油的第二个功能是作为冷却液和防止泄露。最后，气缸壁上的润滑油薄膜有助于活塞环密封并因此提高发动机的压缩性。