Heating system and method for heating a vehicle interior of a vehicle having an internal combustion engine

A heating system for heating a vehicle interior of a vehicle having an internal combustion engine by way of a heat exchanger, the heating system comprising:

• a first heat circuit having a coolant flowing therethrough and coupling the heat exchanger with the internal combustion engine,
• a bypass line of the first heat circuit bypassing the internal combustion engine and having a bypass valve to form a second heat circuit,
• at least one heat source arranged downstream of the bypass line in a flow direction of the coolant,
• a first temperature sensor for measuring a coolant temperature at a coolant outlet of the internal combustion engine,
• a second temperature sensor for measuring the coolant temperature at a coolant inlet of the internal combustion engine, and
• a third temperature sensor for measuring the coolant temperature upstream of the at least one heat source in the flow direction of the coolant,
• wherein in presence of a first condition, where the first temperature sensor detects at least one predetermined nominal inlet temperature of the heat exchanger, the first heat circuit is operated exclusively with the internal combustion engine as a heat source, and
• wherein in absence of the first condition and in presence of a second condition, where the first temperature sensor detects during operation of the first heat circuit a coolant temperature above the coolant temperature detected with the second temperature sensor, the at least one heat source is operated as an additional heat source, or where during the operation of the second heat circuit the first temperature sensor detects a coolant temperature above the coolant temperature detected by the third temperature sensor, the first heat circuit is operated in conjunction with the at least one heat source.

A heating system for heating a vehicle interior of a vehicle having an internal combustion engine by way of a heat exchanger, the heating system comprising:

• a first heat circuit having a coolant flowing therethrough and coupling the heat exchanger with the internal combustion engine,
• a bypass line of the first heat circuit bypassing the internal combustion engine and having a bypass valve to form a second heat circuit,
• at least one heat source arranged downstream of the bypass line in a flow direction of the coolant,
• a first temperature sensor for measuring a coolant temperature at a coolant outlet of the internal combustion engine, and
• a second temperature sensor for measuring the coolant temperature at an inlet of the bypass valve,
• wherein in presence of a first condition, where the first temperature sensor detects at least one predetermined nominal inlet temperature of the heat exchanger, the first heat circuit is operated exclusively with the internal combustion engine as a heat source, and
• wherein in absence of the first condition and in presence of a second condition, where during operation the first heat circuit, the first temperature sensor detects a coolant temperature above the coolant temperature detected by the second temperature sensor, the at least one heat source is operated as an additional heat source, or where during operation of the second heat circuit, the first temperature sensor detects a coolant temperature above the coolant temperature detected by the second temperature sensor, the first heat circuit is operated in conjunction with the at least one heat source.\

A method for heating a vehicle interior of a vehicle having an internal combustion engine by way of a heat exchanger, the method comprising:

• coupling the heat exchanger with the internal combustion engine by way of a first heat circuit through which a coolant flows,
• forming a second heat circuit with a bypass line of the first heat circuit that bypasses the internal combustion engine and has a bypass valve, and
• arranging at least one heat source downstream of the bypass line in a flow direction of the coolant, and further
• in presence of a first condition, where a coolant temperature at a coolant outlet of the internal combustion engine reaches at least one predetermined nominal inlet temperature of the heat exchanger, operating the first heat circuit exclusively with the internal combustion engine as a heat source, and
• in absence of the first condition and in presence of a second condition, where during operation of the first heat circuit, the coolant temperature at the coolant outlet of the internal combustion engine is above the coolant temperature at a coolant inlet of the internal combustion engine, also operating the at least one heat source as an additional heat source, or where during operation of the second heat circuit, the coolant temperature at the coolant outlet of the internal combustion engine is above the coolant temperature upstream of the at least one heat source in the flow direction of the coolant, operating the first heat circuit in addition the at least one heat source.

A method for heating a vehicle interior of a vehicle having an internal combustion engine by way of a heat exchanger, the method comprising:

• coupling the heat exchanger with the internal combustion engine by way of a first heat circuit through which a coolant flows,
• forming a second heat circuit with a bypass line of the first heat circuit that bypasses the internal combustion engine and has a bypass valve, and
• arranging at least one heat source downstream of the bypass line in a flow direction of the coolant, and further
• in presence of a first condition, where a coolant temperature at a coolant outlet of the internal combustion engine reaches at least one predetermined nominal inlet temperature of the heat exchanger, operating the first heat circuit exclusively with the internal combustion engine as a heat source, and
• in absence of this first condition and in presence of a second condition, where during operation of this first heat circuit the coolant temperature at the coolant outlet of the internal combustion engine is above the coolant temperature at the inlet of the bypass valve, operating the at least one heat source additionally as an additional heat source, or where during operation of the second heat circuit the coolant temperature at the coolant outlet of the internal combustion engine is above the coolant temperature at an inlet of the bypass valve, operating the first heat circuit in addition the at least one heat source.