Ⅰ、Fill in the blanks.
1、Engine lubricating systems are divided into two types：（）and （）.
2、In some heavy-duty engines，where the oil has a harder and hotter job to do，（） is included in the lubricating system.
3、Gasoline engine pump is either （）or （）.
4、Engines of more recent designs use a full-flow （） oil filter.
5、The （）keeps the maximum lift of the rotor within 0.3 to 1.5mm.
6、Injection system pressure is controlled by a （）.
7、The fuel levels are measured by a （）unit.
8、The oil pump in automobile engine is driven from a gear made integral with the （）.
9、Fuel systems that have electrical fuel pumps and fuel injectors may use a （） to keep the fuel pressure constant.
10、（） are used to stop any contamination from getting into the fuel system of both gasoline and diesel engines.
11、The purpose of the （）is to connect and disconnect the ignition system from the battery.
12、In pulse injection systems，the total amount of fuel delivered is determined by the length of time the （）are held open.
13、The （）is used to store the fuel of engine needed.
14、Injectors can be part of a throttle body，or installed in the intake manifold and connected to the fuel system through a （）.
15、The computer receives signals from a number of （）whenever the engine is running.
16、The （）system on an internal combustion engine provides the spark that ignites the combustible air-fuel mixture in the combustion chamber.
17、The flow of air and fuel through the carburetor is controlled with
a （）.
18、The function of the （）coil when current passes through it is to creat a very strong electromagnetic field.
19、A distributor rotor is a conductor designed to rotate and distribute the high tension current to the towers of the （）.
20、The primary side of the ignition coil connects in series between the （）and the （）.
21、The （）in a spark ignition engine provides the gap across which the high tension voltage jumps，to create the spark ignites the compressed air-fuel mixture.
22、All starting motors are much the same in general design and operation，differing mainly in the type of （）used.
23、（）is one major performance characteristics of internal combustion engine.
24、The starting speed is 40 to 50 rpm for （）engines and 150 to 250 rpm for （）.
25、The starting system is a type of electrical circuit that converts （） into （）.
26、On automotive engines，two methods usually are employed to actuate the spark advance mechanism，（）and （）.
27、A clutch is a mechanism designed to connect or disconnect （）from one working part to another.
28、Brushes are used to make electrical contact between the rotating （）and the stationary （）.
29、The purpose of the drive is to engage and disengage the pinion gear from the （）.
30、The clutch allows the engine to operate when the vehicle is stopped without placing the transmission in （）.
31、The neutral safety switch remains open except when the transmission is in （） and （）.
32、The （）provides the running surface for the brushes.
33、The （）is an electromechanical device that switches electrical circuit on and off.
34、The flywheel ，clutch cover，release levers，and （）all revolve as a single unit.
Ⅱ、Give brief answers to the following questions.
1、What does the fuel system of the engine consist of？
