DENSO Develops Cold Storage Evaporator that Limits the Rise in Cabin Temperature During an Idle Stop
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DENSO Develops Cold Storage Evaporator that Limits the Rise in Cabin Temperature During an Idle Stop - JCN Newswire
DENSO Develops Cold Storage Evaporator that Limits the Rise in Cabin Temperature During an Idle Stop

Kariya, Japan, Sept 7, 2012 - (JCN Newswire) - DENSO Corporation has developed a Cold Storage (CS) Evaporator, which limits the increase in vehicle cabin temperature during an idle stop when stop/start technology is employed. The newly developed CS Evaporator is equipped with a cold insulator, located in the heat exchanging area, which stores cold energy to be used to cool in-vehicle cabin air while the engine and air-conditioning cycle is off in the idle-stop state.

"Air-conditioning systems with our CS Evaporator can limit the increase in cabin temperature when the engine and air-conditioning are off during an idle stop," said Akio Shikamura, senior executive director of DENSO's Thermal Systems Business Group. "This helps maintain occupant comfort while also increasing the vehicle's fuel efficiency,"

The Evaporator

An evaporator is a component driven by engine power that is used in the air-conditioning cycle. How it works is the cold refrigerant exchanges heat with warm air to send cooled or dehumidified air to the cabin. For conventional air-conditioning systems, when the engine stops during an idle-stop mode, the air-conditioning cycle also stops, which may impact cabin temperature. In order to cool the cabin on higher temperature days, the engine needs to remain on to continue the air-conditioning cycle, which is not fuel efficient.

DENSO's CS Evaporators

The CS Evaporator has the same basic structure and is the size of a conventional evaporator but it can store cold energy more quickly and discharge cooled air more slowly. To accomplish this, DENSO installed a closed case with inner fins and a cold insulation inside. The cold insulation case is placed between refrigerant tubes, which the cold insulator directly and efficiently extracts cold energy from during the air-conditioning cycle. When the air-conditioning cycle is stopped, cooled air is slowly released from the cold insulation container via the outer fins connected to the refrigerant tubes. With these functions, storing cold energy can be completed even in a relatively short time of vehicle travel and cooled air can be supplied to the cabin for a long period of time.

This product will be used in the Wagon R, which was launched in Japan on Sept. 6 by Suzuki Motor Corporation. DENSO will progressively make the CS evaporator available for a greater number of vehicle models worldwide

DENSO will continue its effort to develop environmental technologies which can help increase fuel efficiency while reducing CO2 emissions, as well as improve occupant comfort.

About Denso

DENSO Corporation, headquartered in Kariya, Aichi prefecture, Japan, is a leading global automotive supplier of advanced technology, systems and components in the areas of thermal, powertrain control, electronics and information and safety. Its customers include all the world's major carmakers. Worldwide, the company has more than 200 subsidiaries and affiliates in 38 countries and regions (including Japan) and employs more than 130,000 people. Consolidated global sales for the fiscal year ending March 31, 2013, totaled US$38.1 billion. For more information, go to, or visit our media website at


Sadayoshi Yokoyama, Goro Kanemasu 
Phone: 81-566-25-5594 
Fax: 81-566-25-4509

Sept 7, 2012
Source: Denso

Denso (TSE: 6902) (U.S: DNZOY)

From the Japan Corporate News Network
Topic: Research and development
View more news from these Sectors: Automobile Parts and Manufacturing

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