Internal Combustion Engine Spark plug or fuel injector Valve Power Top Clearance dead center volume Bore Ignition Cylinder Stroke wall Exhaust valve Exhaust opens Bottom valve dead center closes Compression Reciprocating LPiston Exhaust motion Intake valve closes Intake Crank mechanism Rotary Top dead 1 Bottom I motion center dead centr Displacement 上游充通大 May9,2019 2 SHANGHAI JIAO TONG UNIVERSITYMay 9, 2019 2 Internal Combustion Engine Ignition