Case Studies of Industrial Equipment Solutions
Thermal Storage System for Automobile Engine Cooling Water
A thermal storage system for TOYOTA adopted the vacuum-insulated hot water tank.
The system contributed to reducing emissions.
Development background
The world’s first thermal storage system for automobile engine cooling water developed by Toyota Motor Corporation was adopted for the 2004 hybrid vehicle model “Prius” for the North American market. As a part of that system, Tiger Corporation co-developed a thermal storage system with Denso Corporation. Engine coolant heated during driving is stored in the vacuum tank, and is efficiently supplied when the engine is restarted to quickly raise the temperature to the optimum level.
Product details
The vacuum tank keeps temperature of the coolant for hybrid vehicles. The system contributes to reducing emissions to protect the global environment. When an automobile engine is cold, such as at startup, it operates less efficiently than when the engine is running normally at high temperatures. This system stores engine coolant heated during driving in a vacuum tank, and when the engine is restarted, the warmed coolant in the vacuum tank is efficiently supplied to the engine, quickly raising it to the optimum temperature for improved efficiency.
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