Chpt. 11 Modes, Mechanisms, and alternate fuel
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| In the engine, what does preignition cause? | pinging
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| What rating does a diesel fuel have to ignite in cold weather? | cetane
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| What is a vehicle called that can operate on different types of fuel? | Flexible fuel
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| Does diesel fuel vaporize as easily as gasoline? | NO
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| What is a fuel cell an example of? | electrolysis in reverse
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| In the future what might recycled aluminum be used for? | auto bodies
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| What system permits rapid location of stolen or hijacked vehicles? | Vehicle tracking system
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| How does a fuel cell system work? | produces electrical energy by combining hydrogen and oxygen
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| 11 Why is an automotive engine called a power plant? | because it is the source of power for the vehicle
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| 11 What is the hollow area between the top of the piston and the bottom of the cylinder head called? | combustion chamber
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| 11 Tell who an engine converts fuel into a useful form of energy. | combustion pressure forces the piston down by linking the piston to the crankshaft.
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| 11 What can a rotating crankshaft be used for? | drive gears, chains and sprockets, belts and sprockets and other drive mechanisms
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| 11 What is a piston stroke? | the distance the piston slides up or down from TDC/BDC.
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| 11 Name the four strokes of an automobile engine. | 1. intake 2. compression 3. power 4. exhaust
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| 11 How many times must the crankshaft rotate to complete the four stroke cycle? | Two complete revolutions
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| 11 Name the main body of the engine | engine block or cylinder block
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| 11 Describe what cylinders look like. | large, round holes machined through the block from top to bottom
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| 11 Define deck surface. | the top of the block surrounding the cylinders
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| 11 What are water jackets? | are coolant passages through the block that allow a solution of water and antifreeze to cool the cylinders
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| 11 What are main bearing bores? | holes machined in the bottom of the block to hold the crankshaft.
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| 11 Describe what main caps do. | bolt to the bottom of the block and hold the crankshaft and main bearing inserts in place
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| 11 What part changes the up-and-down motion of the pistons into a rotating motion? | crankshaft
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| 11 What is the purpose of crankshaft counterweights? |
prevent engine vibrations
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| 11 What is the function of the crankshaft flange? | holds the engine flywheel
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| 11 What provides a mounting place for the camshaft drive mechanism, front damper, and fan belt pulleys? | crankshaft snout
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| 11 Engine main bearings are inserts that fit between ______and _____. | block main bore and crankshaft main journals
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| 11 List three functions of an engine fly wheel. | 1. connects the engine crankshaft to the transmission or trans-axle. 2. helps smooth engine operation for a vehicle with a manual transmission 3. start the engine(using large ring gear)
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| 11 How many pieces can an engine's rear main oil seal be in? | one or two
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| 11 What is main bearing clearance? | the space between the crankshaft main journal and the main bearing insert
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| 11 What limits the distance the crankshaft can slide forward or rearward in the block? | main thrust bearing
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| 11 What is the small space between the rod bearing and crankshaft journal? | rod bearing clearance
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| 11 Describe the purpose of an engine piston | transfers the pressure of combustion to the connecting rod and crankshaft.
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| 11 Name six part of an engine piston | 1. piston head 2. piston ring grooves 3. piston oil holes 4. piston ring lands 5. piston skirt 6. piston boss 7. piston pin 8. piston clearance
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| 11 What do piston rings do? | keep combustion pressure from entering the crankcase and keep oil out of the combustion chamber
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| 11 What is engine top end? | refers to the cylinder heads, valves, camshaft and other related components.
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| 11 Combustion chambers | small pockets formed in the cylinder heads
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| 11 Describe intake ports purpose? | route air or air and fuel into the combustion chambers
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| 11 What components make up an engine valve train? | camshaft, lifters, push rods. rocker arms, valves, valve spring assemblies
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| 11 Describe the function of the engine valve train? | open and closes the valves at the correct time
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| 11 Where is an engine camshaft located? | in the engine block or in the cylinder head
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| 11 Valve Lifter (tappet) does? | rides on the cam lobes and transfers motion to the rest of the valve train.
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| 11 Push rods | transfer motion between the lifters and the rocker arms
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| 11 Which is usually larger, the intake valve or the exhaust valve? | intake valve
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| 11 Define Value face | the machined surface on the back of the valve head. It touches and seals against the seat in the cylinder head.
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| 11 What is a valve stem | long shaft extending out of the valve head.
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| 11 What is the function of valve seals? | prevent oil from entering the combustion chambers through valve guides
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| 11 Where do fuel injectors and throttle body mount on, on late model engines? | intake manifold
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| 11 What is the function of an exhaust manifold? | carries burned gases into the exhaust system
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| 11 What is a thin metal or plastic cover over the top of the cylinder head? | valve (rocker)
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| 11 What four parts are attached to the engine front end? | camshaft drive, front cover, oil seal, crank damper
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| 11 What is a camshaft drive needed to do? | turn the camshaft at one half engine speed
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| 11 What is the purpose of an automotive engine s crank damper? | prevents crankshaft vibration and damage
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