Method for operating cooling and heating circuit for motor vehicle with internal combustion engine, involves arranging shutoff device between main engine coolant pump and water jacket of engine cylinder block or engine cylinder head

摘要

The method involves arranging a shutoff device between a main engine coolant pump (7) and a water jacket of an engine cylinder block (1b) or an engine cylinder head (1k). The engine coolant flow rate of the main engine coolant pump is temporarily reduced in the direction of values near to zero. Independent claims are included for the following: (1) a method for varying the cabin heating energy and the motor internal cooling agent flow rate of an internal combustion engine of a motor vehicle; (2) a device for varying the cabin heating energy and the motor internal cooling agent flow rate of an internal combustion engine of a motor vehicle; (3) a cooling and heating circuit for motor vehicle with an internal combustion engine; (4) a device for executing the cooling and heating circuit operating method; and (5) a low-temperature exhaust gas recirculation system for vehicles with internal combustion engine.