1.Engine System The engine is used to power a vehicle.Most automobiles uses the gasoline and diesel engine.Its main system includes: Crankshaft and connecting-rod assembly ◆Valve train ◆Engine fuel system Engine lubricating system Engine cooling system Engine ignition systems Engine starting systems1.Engine System The engine is used to power a vehicle. Most automobiles uses the gasoline and diesel engine. Its main system includes: Crankshaft and connecting-rod assembly Valve train Engine fuel system Engine lubricating system Engine cooling system Engine ignition systems Engine starting systems