Browse Publications Technical Papers 2019-01-0502
2019-04-02

Thermal Management of a Hybrid Vehicle Using a Heat Pump 2019-01-0502

This paper presents the thermal management of a hybrid vehicle (HV) using a heat pump system in cold weather. One advantage of an HV is the high efficiency of the vehicle system provided by the coupling and optimal control of an electric motor and an engine. However, in a conventional HV, fuel economy degradation is observed in cold weather because delivering heat to the passenger cabin using the engine results in a reduced efficiency of the vehicle system. In this study, a heat pump, combined with an engine, was used for thermal management to decrease fuel economy degradation. The heat pump is equipped with an electrically driven compressor that pumps ambient heat into a water-cooled condenser. The heat generated by the engine and the heat pump is delivered to the engine and the passenger cabin because the engine needs to warm up quickly to reduce emissions and the cabin needs heat to provide thermal comfort. To control the heat flow from the engine and the heat pump, switching between coolant circuits was used. An optimal way to control the engine and the heat pump to minimize the fuel consumption was found. To this end, a 1-D thermal vehicle model was used for optimization, and the fuel economy of the optimized system was measured on a prototype vehicle. Compared to a conventional HV, the fuel economy of the optimized system improved by 10%.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Development of Advanced Non-Bypass Exhaust Heat Recovery System Using Highly Heat-Conductive SiC Honeycomb

2019-01-0153

View Details

TECHNICAL PAPER

Development of a Compact and High-Performance Radiator for Thermal Management of Environmentally-Friendly Cars

2018-01-0087

View Details

TECHNICAL PAPER

Fuel Efficiency Technology Impact on Radiator Thermal Durability

2019-01-0498

View Details

X