Engine Brakes

Question 1

Engine exhaust brakes work how

Answer 1

Choking down the exhaust flow

Question 2

Double cycle engine brakes work how?

Answer 2

By braking on both up and down stoke of the piston

Question 3

Compression brakes open what valve before the compression stroke is complete

Answer 3

Exhaust

Question 4

Hydro mechanical engine brake operates when the __________is energized. Then oil under pressure flows through a ____________ valve.

Answer 4

Solenoid valve

Control valve

Question 5

Jacobs type engine brakes use _______ movement to time and actuate the hydraulic circuit. This may be the injector rocker or when HEUI systems are used the _______ valve rocker over a different cylinder.

Answer 5

1. Rocker

2. Exhaust

Question 6

In some engines a separate ________ is used for engine brake only.

Answer 6

Cam lobe

Question 7

Internal compression brakes use a _________ control circuit to manage the brakes ________ circuit

Answer 7

1. Electric

2. Hydraulic

Question 8

The operating principle of an internal compression brake is to make the _______ perform the work of compressing the cylinders air charge and to negate or cancel the __________. By releasing the cylinders charge by opening the ________ valves at ________ on the compression stroke.

Answer 8

Piston
Power stroke
Exhaust
TDC

Question 9

Most engine brakes are controlled by an ___________ circuit that requires a series of switches to be closed. At minimum a_________,a___________,and an __________ or ___________ switch.

Answer 9

Electric 
Control switch 
Clutch switch
Accelerator
Governor

Question 10

Hydromechanical engine brake uses oil pressure to move a ________ piston that moves down to the __________ screw of the injector _______ lever. When that lever moves up. High oil pressure is sent to the __________ piston which moves down on the ________ and opens the ___________ valve.

Answer 10

Master
Adjusting
Rocker
Slave
Valve cross head
Exhaust