汽油机燃料供给系 2（Gasoline engine fuel supply system 2）.docVIP

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汽油机燃料供给系 2（Gasoline engine fuel supply system 2）.doc

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汽油机燃料供给系 2（Gasoline engine fuel supply system 2）

汽油机燃料供给系 2（Gasoline engine fuel supply system 2） The fourth chapter gasoline engine fuel supply system First, the multiple-choice question: Answer: 1.a, 2.d, 3.d, 4.a, 5.d, 6.b, 7.c, 8.b, 9.c,, 10.a, 11.a, 12.b, 13.c, 14.d 15.b Two 、 judgment questions: Answer: 1.F, 2.F, 3.T, 4.T, 5.F, 6.T, 7.F, 8.F, 9.T,, 10.F, 11.T, 12.T, 13.T, 14.F 15.F, 16.F, 17.F, 18.F, 19.T, 20.T, 21.T, 22.F, 23.T, 24.F,, 25.F, 26.F, 27.T 28.T, 29.F, 30.F31.F, 32.F, 33.F, 34.F, 35.T, 36.F, 38.T, 37.T Three. Questions and answers: What is the function of the fuel supply system of the 4-1. gasoline engine? Answer: gasoline engine fuel supply system function is according to the different working condition of the engine, with a certain quantity and concentration of combustible gas mixture, and supplied to the cylinder in the near TDC on the spark ignition of complete power, the exhaust gas in the cylinder exhaust. What are the carburetor fuel supply systems for the 4-2. gasoline engine? A: the carburetor fuel supply system consists of four parts, the gasoline supply device, the air supply device, the gas mixing device and the intake and exhaust device. What is the composition and function of the 4-3. float mechanism? A: the float mechanism consists of a float, a needle valve, and a float chamber. The function of the float chamber is to store the gasoline from the gasoline pump. The float and needle valve work together to maintain a suitable oil level in the float chamber. 4-4. what is the function of the metering hole in the simple carburetor? Answer: control the amount of gasoline supplied. How does the 4-5. mixture form? A: when the engine is working, the piston in the intake stroke runs from the TDC to the TDC. As the cylinder volume increases, there is a certain degree of vacuum, so that the air is sucked into the carburetor through the air filter. At the same time, in the float chamber and nozzle opening pressure difference, the float chamber in gasoline by volume ejected from the nozzle hole