Engine Brakes Flashcards Preview

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Flashcards in Engine Brakes Deck (10):
1

Engine exhaust brakes work how

Choking down the exhaust flow

2

Double cycle engine brakes work how?

By braking on both up and down stoke of the piston

3

Compression brakes open what valve before the compression stroke is complete

Exhaust

4

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

Solenoid valve
Control valve

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.

1. Rocker
2. Exhaust

6

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

Cam lobe

7

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

1. Electric
2. Hydraulic

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.

Piston
Power stroke
Exhaust
TDC

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.

Electric
Control switch
Clutch switch
Accelerator
Governor

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.

Master
Adjusting
Rocker
Slave
Valve cross head
Exhaust