Engine Definition： Engine: A machine that converts energy into mechanical force or motion.

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Presentation transcript:

Engine Definition： Engine: A machine that converts energy into mechanical force or motion.

BMW 6-cylinder gas engine Benz 6-cylinder gas engine II Classification ： Gas Engine Diesel Engine 1 According to Fuel BMW 6-cylinder gas engine Benz 6-cylinder gas engine

Four-stroke Engine 2 According to “Stroke” Two-stroke Engine

Cooling system of a V-8 automotive spark-ignition engine Water-cooled Air-cooled 3 According to Cooling System A cylinder from an air-cooled engine Cooling system of a V-8 automotive spark-ignition engine

Single-cylinder Multi-cylinder Inline Ｖ-type Horizontally opposed 4 According to Cylinders Single-cylinder Multi-cylinder Horizontally Opposed Inline Ｖ-type

Operating Principle Camshaft Timing Gear Timing Gear belt valve piston cylinder Connecting rod bearing crankshaft Oil pan

Operating Principle Intake camshaft Spark plug Exhaust camshaft valve Water jacket piston Connecting rod crankshaft

Operating Principle displacement

Top dead center Combustion chamber volume Total cylinder volume Cylinder operating volume Journey of piston bottom dead center crankshaft Semidiameter

Operating Principle 1、Intake Stroke 2、Compression Stroke 3、Power Stroke 4、Exhaust Stroke

Four-Stroke Engine

1 Intake Stroke Piston moves downward Exhaust vale closes Intake valve opens

2 compression stroke Piston moves upward Exhaust valve closes Intake valve closes

3 power stroke Piston moves downward Intake valve closes Exhaust valve opens near the bottom of the stroke

4 exhaust stroke Piston moves upward Exhaust gases Intake valve opens just before the intake stroke Piston moves upward Exhaust valve opens

Four Strokes Operation 1.intake ２.compression ３.power 4.exhaust

Engine Structure Connecting Rods and Crankshaft Valve gear Fuel Two mechanism Connecting Rods and Crankshaft Valve gear Five system Fuel Lubricating Cooling Ignition Starting

Engine structure

Connecting Rods and Crankshaft

Valve Gear

Fuel System

Cooling System

Lubrication System

Ignition System

Starter

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