ABR Staff Writer Published 30 January 2014 <\/p>\n
Hino Motors, Ltd. (Hino) and DENSO Corporation (DENSO) have jointly developed the world's first electric refrigerator system for heavy-duty trucks using a hybrid unit. <\/p>\n
This system is used in the Hino Profia, which will be released on Feb. 1, in Japan. <\/p>\n
With the combination of Hino's hybrid powertrain system technology and DENSO's electric refrigerator system technology, the two companies have developed a high-quality refrigerator system that helps improve fuel economy, improves refrigeration performance, and is quieter when operating. <\/p>\n
Hybrid trucks conventionally use energy generated from hybrid systems to assist the vehicle's driving. However, this new truck uses energy from hybrid unit only for the new electric refrigeration system, which saves fuel. <\/p>\n
Heavy-duty refrigerated trucks typically require an auxiliary engine or need to use their main engine power to operate the compressor of the refrigerator. The newly developed electric refrigerator system uses energy generated while driving or regenerated energy from the hybrid unit to operate the refrigerator's compressor. This substantially reduces the amount of fuel normally used to drive the engine to operate the compressor, thus reducing CO2 emissions as well. <\/p>\n
Compared to refrigerated trucks that use an auxiliary engine to operate the compressor, the new system is quieter, and contributes to an approximately 150kg weight reduction because it does not need an auxiliary engine. <\/p>\n
In addition, compared with those having the main engine-driven compressor system, the new truck can operate the refrigeration compressor at a constant rotational speed using the energy supplied from hybrid system, which stabilizes the refrigeration performance and quality regardless if the truck is moving or stopped. <\/p>\n
Trucks with main engine-driven compressor systems need to have separate refrigerator components in the engine compartment, under the floor panel, and in other places. However, the new truck uses a new integrated refrigeration unit that includes an electric compressor, condenser, and other devices. This simplified structure uses fewer tubes and wires and also is easier to maintain. <\/p>\n
The new refrigerator system includes a stand-by unit that can be connected to an external 200-volt power source so the refrigerator temperature can be maintained while the engine off for a long period of time. The stand-by unit also has a timer function, which can pre-freeze the refrigerator room without the driver's operation. This helps reduce fuel consumption and manpower costs. <\/p>\n
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