27-03-2012, 11:53 AM
ENGINE COMPONENTS
7 Engine components 2.ppt (Size: 4.76 MB / Downloads: 44)
Engine – cylinder block
Largest part of the engine
Upper portion contains cylinder bores – cylinders where pistons move inside
Top of block is where cylinder heads attach to
Lower portion contains crankshaft – part that transfers engine energy to transmission
Called engine “bottom end”
Engine – oil pump
Oil pump – driven by camshaft or crankshaft
Contains 2 interlocking gears that force oil between them and into engine
Pickup tube in oil pan – oil pan is where oil is stored
Engine – water pump
Pumps and circulates coolant throughout the engine block, cylinder head and to radiator and heater core
Different styles
Coolant flow controlled by thermostat – closed when coolant is cold, opens when coolant reaches specific temperature to control coolant flow to radiator
Engine - pistons
Piston is shaped like cylinder bore
Turns explosion of combustion into downward force
Can be made of aluminum, steel, or an alloy – cast or forged
Can be domed, flat or dished top
Contain piston rings
Joined to rod by wrist pin
Engine – cylinder head
Has 1 or more intake and 1 or more exhaust “ports” or passages for gasses to flow into and out of cylinders
Contains mounting “flanges” or areas to mount intake and exhaust manifolds
Contains valvetrain – valves and all moving parts
Joined to block with head gasket – gasket between head and block
Called engine “top end”
Engine – valves
Valves have 3 main areas
Margin – part of valve that seals into valve seat – surface on head that valve seals tightly against when closed
Face – sloped, angled part of valve – curved for air flow
Stem – “stalk” of valve – also contains grooves for “keepers” to lock into
7 Engine components 2.ppt (Size: 4.76 MB / Downloads: 44)
Engine – cylinder block
Largest part of the engine
Upper portion contains cylinder bores – cylinders where pistons move inside
Top of block is where cylinder heads attach to
Lower portion contains crankshaft – part that transfers engine energy to transmission
Called engine “bottom end”
Engine – oil pump
Oil pump – driven by camshaft or crankshaft
Contains 2 interlocking gears that force oil between them and into engine
Pickup tube in oil pan – oil pan is where oil is stored
Engine – water pump
Pumps and circulates coolant throughout the engine block, cylinder head and to radiator and heater core
Different styles
Coolant flow controlled by thermostat – closed when coolant is cold, opens when coolant reaches specific temperature to control coolant flow to radiator
Engine - pistons
Piston is shaped like cylinder bore
Turns explosion of combustion into downward force
Can be made of aluminum, steel, or an alloy – cast or forged
Can be domed, flat or dished top
Contain piston rings
Joined to rod by wrist pin
Engine – cylinder head
Has 1 or more intake and 1 or more exhaust “ports” or passages for gasses to flow into and out of cylinders
Contains mounting “flanges” or areas to mount intake and exhaust manifolds
Contains valvetrain – valves and all moving parts
Joined to block with head gasket – gasket between head and block
Called engine “top end”
Engine – valves
Valves have 3 main areas
Margin – part of valve that seals into valve seat – surface on head that valve seals tightly against when closed
Face – sloped, angled part of valve – curved for air flow
Stem – “stalk” of valve – also contains grooves for “keepers” to lock into