EPA07 MBE 4000 SERVICE MANUAL ENGINE BRAKING POWER To supplement vehicle braking, the MBE 4000 engine can be equipped with an engine brake. Exhaust Brake/Constant Throttle Valves To increase braking performance, the engine is equipped with an exhaust brake on the turbocharger in conjunction with constant throttle valves on the cylinder head. NOTE: The constant throttle values are activated by engine oil pressure. The exhaust back-pressure is used by the exhaust brake to increase braking performance. Optional Engine Brake For high braking output, the MBE 4000 engine can be equipped with an optional engine brake.
The engine brake increases the air mass flow through the engine to provide up to 600 brake horsepower. The engine brake can be operated either manually, in different stages, or automatically, through the cruise control function. Because the charge air pressure is maintained at a high level during braking, full throttle response is available immediately, if the operator desires it, without any turbo lag. All information subject to change without notice. DDC-SVC-MAN-0026 Copyright © 2011 DETROIT DIESEL CORPORATION 19