System for cooling drive units and for heating the inner space of a hybrid vehicle

A system for cooling drive units and for heating the inner space of a hybrid vehicle comprising a cooling circuit in which are connected in series an internal combustion engine, which forms a first heat source, and a cooler, said cooling circuit comprising, in the coolant flow direction, an outgoing connection leading from the internal combustion engine to the cooler and a return connection leading from the cooler to the internal combustion engine, wherein the system further comprises:

• a first control means connected in the outgoing connection and dividing said outgoing connection into first and second outgoing connection sections arranged respectively between the internal combustion engine and the first control means and between the first control means and the cooler;
• a first cooler bypass connected between the first control means and the return connection;
• a second cooler bypass connected between the first outgoing connection section and the return connection;
• and
• a second heat source and a heat exchanger for heating the inner space of the vehicle, said second heat source and said heat exchanger being connected in series in said second cooler bypass,
• said second cooler bypass defining a first heating circuit which comprises the internal combustion engine, the second heat source and the heat exchanger,
• said first control means being formed such that a first connection is provided from the internal combustion engine to the cooler and a second connection is provided from the internal combustion engine into the first cooler bypass;
• and
• wherein the system further comprises uncoupling means connected in said first heating circuit for uncoupling the internal combustion engine from said first heating circuit and thereby defining a second heating circuit comprising the second heat source and the heat exchanger but bypassing the internal combustion engine,
• said uncoupling means comprising a second control means connected in the return connection and dividing said return connection into first and second return connection sections arranged respectively between the cooler and the second control means and between the second control means and the internal combustion engine, said second cooler bypass opening into said first return connection section.