Bayerische Motoren Werke Aktiengesellschaft

Georg Chekaiban

Rainer Richter

Andreas Klemm

Wolfram Enke

Ulrich Wirth

Marko Kovacic

Holger Brandt

Ulrich Hess

A method is provided for operating a cooling system of an internal combustion engine, which cooling system has a controllable rotary slide valve with at least one switched inlet or outlet. The movement of the rotary slide valve into a plurality of switching positions, which each correspond with a cooling system state, is monitored. In accordance with an improper functional state of the rotary slide valve and a current switching position of the rotary slide valve, an operating state of the internal combustion engine is changed to an emergency operation state. A protection system in the cooling system carries out the method and includes a thermal management system, which receives and processes coolant temperatures, and a control unit of a controllable rotary slide valve having a position detector, which can detect a current switching position of the switchable rotary slide valve, wherein the thermal management system is connected to the control unit of the rotary slide valve.

Method for operating a cooling system of an internal combustion engine and protection system in a cooling system

A coolant circuit is provided for an internal combustion engine having a compression machine for intake air. The coolant circuit includes a high-temperature circuit and a low temperature circuit. The high-temperature circuit is provided in order to cool the internal combustion engine by way of a coolant radiator and a first coolant pump arranged in the high-temperature circuit. The low-temperature circuit is provided with a second coolant pump in order to cool the intake air compressed by the compression machine by way of an intercooler and in order to cool a coolant of a coolant circuit in a condenser. The high-temperature circuit and the low-temperature circuit are cooling circuits which are separated from each other. The thermal base load of the low-temperature circuit is reduced by this design, whereby the pressure level in the coolant circuit can be reduced resulting positively in a reduction of the energy consumption.

Coolant circuit for an internal combustion engine

According to a method and a system for controlling a cooling system of an internal-combustion engine, the capacity of a coolant pump is controllable as a function of a fuel quantity fed to the internal-combustion engine.

Method and system for controlling a cooling system of an internal-combustion engine

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Wolnzach, Germany

Georg Chekaiban