Engine size and performance measurements

A_____crankshaft has weights formed opposite every rod journal

Fully counterweighted

What is the function of a mean thrust bearing?

Limits crankshaft end play.

the metric unit for power is the _____.

Watt (kilowatt)

If one piston displaces 30cu. in. and the engine has four cylinders, what is the engine's displacement?

120 cu.in.

WHat is the normal compression pressure for a modern automotive gasoline engine?

130-180 psi

About how much horsepower would be needed for a small engine to life 1000 lb a distance of 500' in one minute

15.2 hp

IF an engine has a bore of 3" and a stroke of 4", what is its piston displacement

28.26 cu. in.

Cylinder bore is very in size, but are typically from ____ to _____.

3 inches to 4 inches

Automotive pistons normally use___rings,___compression rings, and___oil rings

3,2,1

Engine thermal efficiency is generally ________%.

30-40%

if you use a hoist to lift a 600 lb engine 5' in the air, how much work has been done?

3000 ft lbs

How much power is needed for an engine to move a 4000lb car 2000' in one minute?

8,000,000 W

Define powdered metal forging

A process that forms the rough shape of a part out of metal powder before final shaping in a powerful forge

Identify the bore and stroke areas of measurement indicated below ***** insert pic on app

A) Bore B) Stroke C) two times offset equals stroke D) main journal centerline E) Rod journal centerline F) stroke

Many vehicles use____blocks to reduce weight and increase fuel economy.

Aluminum

And_____cylinder block dissipates he better than an____block.

Aluminum and cast-iron

Connecting rod and main bearings are available in undersizes of ______. (A) 0.125", 0.135", 0.145", 0.155" (B) 0.010", 0.020", 0.030", 0.040" (C) 0.225", 0.235", 0.245", 0.255" (D) 1.010", 1.020", 1.030", 1.040"

B

normally _____ of an engines power is lost to friction A) 10-15% B) 20-30% C) 35-40% D) 40-55%

B. 20-30%

Piston displacement is the volume the piston displaces as it travels from _____ to _____

BDC to TDC

____Is the barons ability to withstand being acted on by acid, water, and other impurities in the engine oil.

Bearing corrosion

____Refers to the ability to absorb dirt, metal, or other hard particles

Bearing embedability

____Is the bearings ability to withstand pounding and crushing during engine operation

Bearing load strength

____Is used on sport type engine bearings to hold a bearing in place during assembly.

Bearing spread

____Is the barons ability to adjust the imperfections in journal surface.

Besring confirmability

Generally, a larger ____ and a longer stroke make an engine more powerful

Bore

How is engine size determined?

By the number of cylinders, the cylinder diameter, and the amount of piston travel per stroke.

A____piston is slightly out of round when viewed from the top.

Cam-ground

What are pissed and pins normally made of?

Case hardened steel

____Is a heating and cooling process that increase the way resistance of the piston pin.

Case hardening

What are engine cylinder blocks normally made of?

Cast iron or aluminum

What are engine crankshaft usually made of?

Cast iron or forge steel

Hard rain coatings, such as____, are used in new or Freshly machine cylinders that are perfectly round.

Chrome or moly

The____prevent pressure leakage into the crank case and white boy from the cylinder walls

Compression rings

____ are used to ensure proper location of each connecting rod in the engine.

Conecting rods

The amount of throw (offset) built into the_____controls the piston stroke

Crankshaft rod

How is cylinder bore measured?

Cross the cylinder, parallel with the top of the block

Define cylinder bore

Diameter of the engine cylinder

Find piston stroke

Distance the piston moves from TDC to BDC

An ____is relatively thin and is not exposed to engine coolant.

Dry sleve

The head of a____piston is parallel with the box deck surface

Flat top piston

When are soft ring costings desirable?

For you cylinders that are slightly worn.

Turbo charged or diesel engines are normal equipped with crankshaft made of___.

Forged steel

___Mains are used on high performance engines.

Four bolt

And____pissed and Penny secured by snap rings and it's free to rotate in both the right and piston.

Full floating

How are engine bearings lubricated?

I bury Noyle holes in grooves in the engine bearings permit bearing lubrication

Explain low inertia parts

Light parts that will accelerate quickly

Oil enters the crankshaft at the____and passes through holes in the main bearing journals.

Main bearings

A____crankshaft has weights from opposite the journals in the center portion of the shaft only.

Partially counterweighted

____Generally refers to the countor of the piston top.

Piston head shape

A____on the head of the piston is frequently used to indicate piston pin offsite in the front of the piston

Piston notch

Describe the purpose of a rear main bearing oil seal.

Prevents oil leakage around the back of the crankshaft

Piston ring____is the distance from the face of the ring to it's inner wall.

Radial wall thickness

Name the two basic oil ring designs.

Rail spacer and one piece

Piston____is the distance between the ends of the ring when installed in the cylinder

Ring gap

The piston____is the distance from the top of the rain to the bottom of the ring.

Ring width

A____provide clearance between the piston and the crankshaft counterweights.

Slipper skirt

A pressfit pissed and penis force tightly into the connecting rods_____.

Small end

Define valve reliefs

Small intentions either cast or machine into the piston crown to provide ample piston to valve clearance.

And undersize bearing is designed to be used on a crankshaft journal that has been machine to a____diameter.

Smaller

A___bearing has the original dimensions specified by the engine manufacturer for a new, unworn, or on machine crankshaft.

Standard

Most connecting rods are made of____.

Steel

_____ horsepower is simply a general rating of engine size

Taxable

Define ring groove width.

The distance measure from the top to the bottom of the ring groove.

What is meant by the term pin hole diameter?

The distance measured across the inside of the piston pin hole.

Define pissed in diameter.

The distance measured across the sides of the piston.

If an engines specs for bore and stroke are given as 4.00"X 3.00", what does it mean?

The engine cylinder is 4 inches in diameter and the piston stroke is 3 inches

Explain ring seating

The initial ring where that makes the ring perfectly match the surface of the Cylinder

What is the function of a piston oil ring?

To keep crank case oil out of the combustion chambers

What is the purpose of piston pin offset?

To quiet the piston during use.

What is the purpose of a whole machine through the entire length of a drill connecting rod?

To supply oil to the piston

With a V type of engine,____connecting rods ball to each row journal.

Two

And____the main blog only uses to cap screws to secure each main bearing cap to the____.

Two bolt and cylinder block

Name three types of rear main bearing oil seals.

Two piece neoprene, one piece neoprene, and a wick or rope seal

What is the purpose of bearing crush

Used to help a split type bearing from spinning inside it's bore during engine operation

What is the purpose of piston taper?

Used to maintain the correct piston to Sonder clearance.

______ is the ratio of air drawn into the cylinder and the maximum possible amount of air that could enter the cylinder

Volumetric Efficiency

An_____Is exposed to engine coolant in my Swiss steak and combustion pressure and heat without added support of the cinder block.

Wet sleeve

What are the possible causes if an engines compression pressure is low

bad rings, burned valves, or a blown head gasket

_____ measures the usable power at the engine crankshaft

brake horsepower

A ____ measures the horsepower delivered to the drive wheels

chassis dynamometer

Define mechanical efficiency

compares brake horsepower and indicated horsepower

Define compression ratio

compares the cylinder volume with the piston at TDC to the cylinder volume with the piston at BDC

A _____ is used to measure engine compression pressure

compression gauge

A large cylinder diameter and large piston stroke produce a large piston _______.

displacement

A _____ is used to measure the brake horsepower of modern car engines

engine dynamometer

_____ horsepower is the engine power available with only basic accessories installed

gross

Thermal efficiency measures the amount of _____ converted into crankshaft rotation

heat energy

what is engine horsepower?

is a measure of an engines ability to perform work (power)

Define force

is a pushing or pulling action

Define engine torque

is a rating of the turing force at the engine crankshaft

define compression pressure

is the amount of pressure produced in the cylinder during the compression stroke

_____ horsepower is the maximum power developed when an engine is loaded by all accessories

net

Engine displacement is the volume displayed by all the _______ in an engine

pistons

COmpression pressure is normally measured in _____.

pounds per square inch

Define indicated horsepower

refers to the amount of power formed in the engine combustion chambers

Engine torque specifications can be looked up in a _____.

shop manual

What accounts for most of an engine's frictional loss?

the friction between the piston rings and cylinder walls

Explain frictional horsepower

the power needed to overcome engine friction

define power

the rate or speed at which work is done

Engine displacement is usually matched to the _____ of the vehicle

weight