What Does a Gasoline Engine Inhale During the Intake Stroke?

1 Answers
LillianaLynn
07/30/25 9:48am
During the intake stroke, a gasoline engine inhales gasoline. Here are the relevant details: 1. Air-fuel mixture: Diesel engines inhale pure air during the intake stroke. Near the end of the compression stroke, diesel fuel is pressurized to over 10 MPa by the fuel injection pump and then injected into the cylinder through the fuel injector. It quickly mixes with the high-temperature compressed air to form a combustible mixture. 2. Air pressure: Due to the high compression ratio of diesel engines (typically 16-22), the air pressure in the cylinder at the end of compression can reach 3.5-4.5 MPa, with temperatures as high as 750-1000 K (while the air-fuel mixture pressure in gasoline engines at this stage is 0.6-1.2 MPa, with temperatures reaching 600-700 K), significantly exceeding the autoignition temperature of diesel fuel.
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