Patent ID: 6543226
Filing Date: 2003-04-08
Classification: F02D

Abstract:
An exhaust gas turbocharger with a variable turbine geometry which, in an engine firing operation, is adjustable via an automatic turbine controller to a definable desired supercharging pressure in an intake port thereof and, in a braking operation, is adjustable via an engine braking system with an automatic braking controller as a function of operating parameters of the internal-combustion engine into a ram position which increases pressure in an exhaust gas system, comprising a first change-over element for a change-over between the engine braking system and the automatic turbine controller, wherein the automatic turbine controller and the engine braking system are individual modules, and a second change-over element operative to provide a change-over between the automatic braking controller and a manually adjustable brake operating device other than a vehicle service brake, whereby the manually adjustable brake operating device is configured to generate a manual braking signal that is directly suppliable to the engine braking system and that is compared with a rotational-speed-dependent braking limit value.