Patent Number: 6,253,551

Title: Device for controlling boost pressure in an internal combustion engine

Abstract: An arrangement includes a first controller which is only switched through to an actuator for a turbocharger if a fault recognition device detects no fault in the operation of the engine. A switchover is made from the first controller to a second controller, if the fault recognition device detects a critical fault. In this connection, the second controller receives a system deviation as an input signal that is different from the one received by the first controller. Thus in the event of a fault, the turbocharger can be controlled in a very flexible manner without the danger that the speed of the turbocharger is increased into its critical range.

Inventors: Lohmann; Andrea (Stuttgart, DE), Baeuerle; Michael (Markgroeningen, DE), Ries-Mueller; Klaus (Bad Rappenau, DE)

Assignee: Robert Bosch GmbH

International Classification: F02D 41/00 (20060101); F02D 41/22 (20060101); F02D 23/00 (20060101); F02D 023/00 ()

Expiration Date: 07/03/2018