Experimental Results of a Novel Electronic Expansion Valve Otto Egelhof GmbH and CompanyKG

Format:

Book

Conference/Event

Author/Creator:

Sohn, Jürgen, author.

Contributor:

Willers, Eike

Conference Name:

Thermal Management Systems Conference 2021 (2021-09-22 : Rajasthan, India)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2021

Summary:

In modern vehicles, a large number of electric motors and solenoid valves are installed, which perform a wide variety of regulation and control tasks. Especially in refrigeration circuits, motor or magnetically driven valves for thermal management of passenger compartments or electrical components such as batteries are necessary. The advantage of these actuator types lies in the acceptable price/performance ratio. Disadvantages often are the weight of the actuators as well as the noise during switching.There is the development of actuators for refrigerant valves based on a pre-stressed wire element made of a shape memory alloy (SMA), that meets an acceptable price/performance ratio especially. Shape memory alloys are also known as "smart materials" and have the property of being able to switch frictionlessly and completely noiseless between two different phases with two different crystal structures. Additionally “smart materials” have both actuator and sensor properties. The SMA element in the surrounding refrigerant is activated by means of electrical current with the help of Ohm's resistance. The SMA drives are used in the climate circuit as a switching valve or with appropriate resistance or position-based control as a proportional valve. The great advantages of these developments lie in economical, silent, lightweight drives with position feedback due to the integrated sensor properties of the SMA elements

Notes:

Vendor supplied data

Publisher Number:

2021-28-0149

Access Restriction:

Restricted for use by site license