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1、汽油机燃料供给系（Gasoline engine fuel supply system）The fourth chapter gasoline engine fuel supply systemFirst, the multiple-choice question:The amount of fuel supplied by the 1. diaphragm type gasoline pump depends on the size of the pump.A. patch uplinkB. patch downlinkC. diaphragm spring tensionD. rocker
2、 swing momentum2. if the eccentric on the camshaft is badly worn, the gasoline pump ().A. fuel pressure riseB. lower fuel pressureC. increase of oil per cycleD. the fuel supply per cycle decreases3. when the gasoline engine is in the middle load condition, the excess air value should be ()A. 0.2, 0.
3、6B. 0.70.9C. 0.8, 0.9D. 0.91.14., if the gasoline pump diaphragm spring is perfect, will make ().A. fuel supply increasedB. fuel supply decreasedC. fuel pressure is too highD. low fuel pressure5. now, the idle speed rating of the gasoline engine is higher than in the past.A. can increase the rated s
4、peed of engine and increase power accordinglyB. reduces fuel consumptionThe C. speeds up the engineD. can make use of lower mixture at idle and reduce exhaust pollution6. when the engine is under heavy load condition, the excess air coefficient should be in () range.A. 0.6 0.8B. 0.8 0.9C. 0.9 1.1D.
5、1.1 1.2When the 7. gasoline engine works, the inlet pipe enters the cylinderA. gasolineB. airC. gas mixtureD. diesel8. the main components of the gas mixture are: ()A. air filterB. carburetorC. gasoline pumpD. gasoline filter9. the main assemblies used to complete the delivery of gasoline during the
6、 operation of the gasoline engine are: ()A. air filterB. carburetorC. gasoline pumpD. gasoline filter10. the main assemblies used to provide clean air during the operation of the gasoline engine are: ()A. air filterB. carburetor;C. gasoline pump;D. gasoline filter11. the excess air factor of the the
7、oretical mixture is: ()A. 1B. 0.85 0.95C. 1.05 1.15D.Fourteen point sevenThe excess air factor of the 12. power mixture is: ()A. 1B. 0.85 0.95C. 1.05 1.15D. 14.713. the excess air factor of the mixed gas is: ()A. 1B. 0.85 0.95C. 1.05 1.15D. 14.714. the air-fuel ratio of the theoretical mixture is: (
8、)A. 1B. 0.85 0.95C. 1.05 1.15D. 14.715. what extent does the excess air coefficient of the mixture lead to when the combustion rate slows down and the performance of the engine begins to decrease? ()A. 1.15;C. 1.3 to 1.4Two 、 judgment questions:1. the gasoline engine mixture is formed in the cylinde
9、r. ()2. when the gasoline engine is working, the mixture is compressed and spontaneous combustion. ()3. the throttle valve in the carburetor is used to control the intake of the engine. ()4. when the gasoline engine burns normally, the flame should travel at a certain speed. ()5. the function of the
10、 venturi in the carburetor is to limit the intake. ()6. at idle, the throttle valve opens with minimal entry into the cylinder and requires a small amount of concentrated mixture. ()7. when the small load, the quantity and quality of the mixture is higher than the idle speed, so the mixture is requi
11、red to be stronger than the idle speed. ()8. engines often work under moderate loads and should be supplied with a stronger mixture to ensure a good engine performance. ()9., in order to ensure the engine under large load dynamic requirements, should be supplied with a high concentration of power mi
12、xture. ()10. in idle conditions, the engine does not output power, the supply of a thinner mixture can meet the requirements. ()11. when the engine is speeding up, it should be added with a strong mixture to increase engine power rapidly. ()12. the air valve on the lid of the gasoline tank prevents
13、the pressure in the tank from too low and affects the normal suction of the gasoline pump. ()The steam valve on the top of the 13. gasoline tank prevents the pressure in the tank from being too high, so as to ensure safety. ()14. in use, the gasoline filter can be installed in any direction. ()15. t
14、he function of the gasoline pump is to filter the moisture and impurities in the gasoline. ()16. when the engine works, the fuel supply of the gasoline pump remains constant. ()17. with the hand rocker pump oil, if the float chamber oil level up to the required height, will not pull the rocker arm.
15、()18. when the engine works, no matter how much gasoline pump supplies, the rocker arm and diaphragm stroke are fixed. ()19. when the engine works, no matter how much fuel the pump supplies, the swing range of the rocker arm is fixed. ()20. gasoline pump is generally installed on the cylinder side, the use of eccentric wheel on the camshaft to dr
