Commercial motor vehicles can be equipped with various types of auxiliary retarders to assist with deceleration. Match each auxiliary retarder type to its primary operating mechanism.
- Exhaust retarderRestricts gases in the exhaust system to generate retarding back pressure
- Engine compression retarderReleases compressed air through cylinder valves to prevent energy return to the pistons
- Hydraulic retarderCirculates fluid through an internal vane chamber to produce viscous drag
- Electric retarderUses electromagnetic coils to produce opposing magnetic resistance around driveline rotors
Answer
Exhaust retarder pairs with restricting exhaust gases to generate back pressure; Engine compression retarder pairs with releasing compressed air to prevent piston push; Hydraulic retarder pairs with circulating fluid to produce viscous drag; Electric retarder pairs with using electromagnetic coils to produce opposing magnetic resistance.
Each retarder is correctly matched to its defined physical mechanism: exhaust retarders restrict the flow of exhaust gases to build back pressure; engine compression brakes release trapped compressed air from the cylinders; hydraulic retarders use fluid drag within a housing; and electric retarders generate opposing electromagnetic fields on driveline rotors.
Step-by-Step Solution
Key Concept
The four main types of commercial vehicle retarders (exhaust, engine compression, hydraulic, and electric) each apply resistance to the drivetrain using different media and mechanical principles to slow the vehicle.
Estimated Time:45s