化油器的目的是提供并计量与发动机转速和负荷相应的可燃混合气。
The purpose of the carburetor is to supply and meter the mixture of fuel vapor and air in relation to the speed and load of the engine.
喷油压力、喷油始点、喷油持续角和喷油率均取决于柴油机转速和负荷。
The injection pressure, timing, duration and rate depend on the engine speed and load.
首先，它必须定量供应精确数量的燃油，定量供应精确数量的燃油，使发动机在驾驶员所要求的转速和负荷条件下运行。
First, it must meter the correct amount of fuel to run the engine at the speed and load demanded by the driver.
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