Pressure Sensor Type: This type directly measures cylinder pressure using a high-precision sensor, providing accurate data that can be displayed in real time. It is suitable for modern electronically controlled engines.
Starting Current Type: This type utilizes the proportional relationship between starter motor current and cylinder pressure, indirectly calculating pressure by detecting current changes. It does not require spark plug removal, but its accuracy is lower.
Inductive Discharge Type: This type determines cylinder pressure by analyzing the discharge waveform of the ignition coil secondary voltage. It is suitable for gasoline engines and requires specialized equipment.
Significance of Testing: Cylinder pressure is a core indicator for evaluating the mechanical condition of an engine. Balanced pressure ensures smooth engine power output, good fuel economy, and reduced emissions. Regular testing helps detect potential faults early and prevents major mechanical damage.
