Cooling system and method for auxiliary brake device of hydrogen fuel cell truck
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorHyeon Chae Moon
Life of this patent
Estimating the term…
Abstract
A cooling system and method for an auxiliary braking device of a hydrogen fuel cell truck, are provided in consideration that auxiliary braking force generated by the regenerative braking of the motor may be unnecessary and the brake resistor may be unnecessary when a sufficient amount of auxiliary braking force is generated alone by the operation of a retarder. A portion of thermal energy generated by the retarder is distributed to a stack cooling system so that the portion of thermal energy is removed by the stack cooling system. Accordingly, due to sufficient cooling of the retarder, a sufficient amount of auxiliary braking force is provided, and the brake resistor that has consumed surplus electrical energy generated by regenerative braking is removed.
Claims17
A cooling system for an auxiliary braking device of a vehicle, the cooling system comprising:
- a retarder radiator configured for cooling thermal energy generated during an operation of a retarder of the vehicle;
- a first cooling fluid supply line connected to an outlet side of the retarder and an inlet side of the retarder radiator;
- a first cooling fluid discharge line connected to an outlet side of the retarder radiator and the inlet side of the retarder;
- a retarder cooling fluid temperature sensor mounted on the first cooling fluid discharge line;
- a three-way valve mounted on the first cooling fluid discharge line, between the retarder cooling fluid temperature sensor and the retarder;
- a heat exchanger enabling cooling fluid to circulate from a stack cooling system;
- a first cooling fluid branch line connected to the three-way valve and an inlet of the heat exchanger;
- and
- a first cooling fluid return line connected to an outlet of the heat exchanger and a portion of the first cooling fluid discharge line between the three-way valve and the retarder.
A cooling method of controlling a cooling system for an auxiliary braking device of a vehicle, the cooling method comprising:
- determining, by a retarder cooling controller, whether a retarder of the vehicle is operating and comparing, by the retarder cooling controller, a temperature of retarder cooling fluid with a predetermined temperature;
- upon determining that the retarder is operating and the temperature of the retarder cooling fluid detected by a retarder cooling fluid temperature sensor mounted on a first cooling fluid discharge line connected to the retarder and a retarder radiator is higher than a predetermined torque value, supplying the retarder cooling fluid that has been flowing from the retarder radiator to the retarder, to a heat exchanger in which cooling fluid from a stack cooling system is flowing, cooling the retarder cooling fluid through heat exchange therebetween;
- and
- supplying the retarder cooling fluid cooled in the heat exchanger to the retarder to cool the retarder.
Dependencies are inferred from the claim text.