Test #2 Study

Question 1

The “Veins” of the bike is and does what?

Answer 1

Delivers fuel from the pump to the fuel rail or injector.

Question 2

Describe the “Y” theory.

Answer 2

Every atomizing circuit has three openings.

Question 3

The “Muscle” of the bike is and does what?

Answer 3

Injectors - sprays high pressure fuel ensuring excellent atomization at all intake speeds.

Question 4

Answer 4

Question 5

What makes the slide rise in a CV carburetor?

Answer 5

Pressure Differences

Question 6

Three current basic injection duration methods:

Answer 6

A.) D-Jetronic (D-J)

B.) Alpha-N

C.) L-Jetronic (L-J)

Question 7

Throttle linkage is used to activate what auxiliary circuit?

Answer 7

Accelerator Pump

Question 8

What are the three purposes of the carburetor?

Answer 8

A.) Controls air volume supplied to the cylinder.

B.) Controls fuels supplies to the air.

C.) Varies AFR to sut engine requirements.

Question 9

Tow major parts of the float valve:

Answer 9

A.) Seat

B.) Needle

Question 10

Answer 10

Question 11

What three type of needle jets on a mechanical slide carburetor?

Answer 11

A.)Primary Type

B.) Bleed Type

c.) Primary/Bleed Type

Question 12

What are the three primary EFI sensor?

Answer 12

A.) IAP or MAP

B.) TPS or APS

C.) CKP or CPS

Question 13

Explain a “closed loop system”:

Answer 13

System that gets feedback from the exhaust and adjusts accordingly/

Question 14

Major Reasons for EFI:

Answer 14

A.)AFR is not reliant on jet sizes and air pressure differences.

b.) AFR can be controlled and changed based on a computer ontrolled fuel map.

C.) Increased emissions.

D.) Less problems from emissions with quick throttle change.

E.) Allows the use of multiple system interactions.

Question 15

The holes drilled in the fuel tube are?

Answer 15

Air Bleeds

Question 16

What’s the purpose of a slide cutaway on a mechanical slide carburetor?

Answer 16

Funneling effect assists with the transition from transer to needle circuit.

Question 17

Answer 17

Question 18

What controls the transer ports?

Answer 18

Throttle Plate

Question 19

Answer 19

Question 20

Describe Venturi Principle:

Answer 20

More speed = Less pressure

Question 21

When was fuel injection originally designed?

Answer 21

1902

Question 22

Purpose of the power jet:

Answer 22

Fuel amounts are regulated to create optimum combustion temperates and acceleration rate.

Question 23

Is a restriction used to meter fuel or air flow.

Answer 23

Jet

Question 24

Two ways power jets are controlled:

Answer 24

Pressure Jets

Electronically

Question 25

What are the two other names for the idle circuit?

Answer 25

A.) Slow

B.) Pilot

Question 26

Name the three auxiliary circuits found on carburetors:

Answer 26

A.) Accelerator Pump

B.)Power Jet

C.) Air Cut Valve

Question 27

The “Body” of the bike is and does what?

Answer 27

Throttle Body - throttle plates, also known as butterflies, control air velocity and volume.

Question 28

The mechanical slide carburetor has how many tuneable circuits?

Answer 28

4

Question 29

Answer 29

Question 30

What controls the airflow in a mechanical slide carburetor?

Answer 30

Slide Throttle

Question 31

The “Heart” of the bike is, and does what?

Answer 31

Fuel Pump - Supplies high pressure to the fuel lines.

Question 32

Answer 32

Question 33

Answer 33

Question 34

Name & Desribe the two engine cold start systems.

Answer 34

A.) Choke - A choke plate closes to create a large pressure difference at the fuel tubes causing all tubes to discharge fuel.

B.) Enrichener - a subsystem which acts like a mini carburetor to richen fuel.

Question 35

Sensor input data is split in to what categories?

Answer 35

A.)Primary

B.) Secondary

Question 36

Purpose of the air cut valve:

Answer 36

Prevents lean misfires on deceleration.

Question 37

Sensor signals are split in to what three categories?

Answer 37

A.) 5 Volt

B.) Inductive

C.) Electrochemical

Question 38

Name the three carburetor mounting styles.

Answer 38

A.)Flange

B.) Spigot

C.) Clamp-on

Question 39

What are the three basic carburetor circuits?

Answer 39

A.) Idle Circuit

B.) Midrange Circuit

C.) Main Circuit

Question 40

Four benefits of the CV carburetor:

Answer 40

A.) Fuel Efficient

B.) AFR is delivered proportionally to engine RPM

C.) Lower Emissions

D.) Compensate somewhat for altitude.

Question 41

What controls the operation of the air cut valve?

Answer 41

Engine Vacuum

Question 42

What restricts/allows air flow to the engine?

Answer 42

Throttle

Question 43

When did the 1st/2nd generation EFI systems emerge on motorcycles?

Answer 43

1st - early 90’s

2nd - Late 90’s

Question 44

The butterfly throttle controls what in the fixed venturi carburetor?

Answer 44

Airflow

Question 45

Answer 45

Question 46

The “brain” of the bike is and does what?

Answer 46

ECU - controls fuel delivery and ignition timing.

Question 47

Purpose of the slide lift hole:

Answer 47

Allows low pressure to get to the top of the slide.

Question 48

Alpha-N and D-Jetronic (DJ) are used for what, in motorsport applications?

Answer 48

Basic injection duration

Question 49

What does the ECU activate?

Answer 49

A.) Injectors

B.) Spark Plugs/Coils

C.) ETV (Electronic Throttle Valve)

D.) Idle Speed Control

E.) Instrument cluster RPM, speed, warning lights, etc,

Question 50

Purpose of the accelerator pump:

Answer 50

Prevents a lean condition on acceleration.

Question 51

Answer 51

Question 52

Answer 52