US 12,276,223 B2
Coolant circuit in a vehicle
Philipp Buecherl, Schmidgaden (DE); and Florian Schneider, Eichenau (DE)
Assigned to Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
Appl. No. 17/434,930
Filed by Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
PCT Filed Feb. 5, 2020, PCT No. PCT/EP2020/052796
§ 371(c)(1), (2) Date Aug. 30, 2021,
PCT Pub. No. WO2020/177963, PCT Pub. Date Sep. 10, 2020.
Claims priority of application No. 10 2019 105 505.9 (DE), filed on Mar. 5, 2019.
Prior Publication US 2022/0145794 A1, May 12, 2022
Int. Cl. F01P 7/16 (2006.01); F01P 3/20 (2006.01); F01P 5/10 (2006.01); F01P 7/14 (2006.01)
CPC F01P 7/16 (2013.01) [F01P 3/20 (2013.01); F01P 5/10 (2013.01); F01P 2007/146 (2013.01); F01P 2025/08 (2013.01); F01P 2060/04 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A coolant circuit in a vehicle, comprising:
a pump;
an engine;
a radiator;
a first flow control unit disposed in a main duct between the engine and the radiator, wherein the first flow control unit has a first valve and an actuator, and wherein the first flow control unit, as a function of a temperature of a coolant, in a stepless manner, thermostatically controls in an open loop or a closed loop a flow of the coolant;
a bypass duct which is fluidically disposed parallel to the radiator, wherein the bypass duct opens into the main duct after the radiator and branches off the main duct between the engine and the first flow control unit;
a second flow control unit disposed in the bypass duct remote from the first flow control unit in the coolant circuit, wherein the second flow control unit has a second valve; and
a first temperature sensor disposed in the engine or in a flow direction directly downstream of the engine, wherein the first temperature sensor is assigned to the first flow control unit and the second flow control unit,
wherein the first temperature sensor is an electronic temperature sensor that detects the temperature of the coolant,
wherein the first flow control unit and the second flow control unit are each an electronically actuated throttle thermostat,
wherein the first flow control unit and the second flow control unit are two-state valves that each have exactly one open state permitting coolant flow therethrough and exactly one closed state blocking coolant flow therethrough, and
wherein the first flow control unit and the second flow control unit cooperatively open and close the bypass duct, via an inverse open/close state relation to each other, as a function of the temperature of the coolant.