I just get to know the working steps of a four-stroke motor. I didn’t quite understand the meaning of the 2 measure compression. When compacting, the piston moves to the upper dead point. The volume decreases, which increases the pressure and temperature of the air-fuel mixture. What is the meaning of this now? As far as I understand this, the fuel is present in the air-fuel mixture in liquid state of the aggregate. The rising temperature of the mixture changes the f Loose fuel can be converted into gas and gas can be burned better, which is important for the following 3 measure work. Did I understand that correctly?