What is the normal cylinder pressure for a car engine

[VonOscar]

Automobile engine cylinder pressure is around 1000kpa. Generally, gasoline engines are around 1000kpa, diesel engines are around 2000kpa, most fuel injection engine cylinder pressures are between 1200~1400kPa, and a few high compression ratio engines have cylinder pressures above 1700kPa. The cylinder is a piston in the car's combustion chamber that is driven by the pressure or expansion force of the working fluid. The classification of cylinders is as follows: 1. Single-acting cylinder: Only one end has a piston rod, with air supplied from one side of the piston to generate pressure, which pushes the piston to produce thrust for extension, and returns via spring or self-weight. 2. Double-acting cylinder: Air is alternately supplied from both sides of the piston, producing force in one or two directions. 3. Diaphragm cylinder: Uses a diaphragm instead of a piston, producing force in only one direction, with spring reset. It has good sealing performance but a short stroke.