B42.60-0064-01
20.05 Engine brake drive cylinder
33.01 Engine brake electropneumatic valve
c Braking pressure
Operation
When actuated, the engine brake electropneumatic valve (33.01) allows the passage of air from the air reservoir (5.01) into the engine brake drive cylinder (20.05).
The engine brake pneumatic cylinder (20.05) drives the throttle butterfly of the engine brake, which is (normally) located in the engine exhaust circuit.