Implementation of custom solenoid valves in thermal management systems to accurately control flow rate can enable greater vehicle reliability and efficiency.
Next generation vehicles require better thermal management control. Controlling components and systems to optimal temperatures can offer increased reliability, efficiency, durability and safety. Developing custom solutions incorporating solenoid valves are emerging as attractive and cost-effective solutions.
These solutions may be obtained using a solenoid valve, a subset of similar solenoid valves or an array of different solenoid valve types. Typically, there are three main electromechanical solenoid valve types used in liquid cooled systems: binary, proportional and latching. The valve’s performance requirements determine what type must be used in each application. A binary and latching valve allow for two positions of flow control either fully open or fully closed. While a proportional valve allows the controller to vary the position of the flow restricting component, changing the fluid output.
With high-end magnetic and fluid modeling software, the performance of any type of solenoid valve can be designed with confidence before producing physical samples. Figure 1 displays a latching and a binary magnetic circuit. Magnetic flux is generated from either a permanent magnet or by applying power to a copper coil. As the magnetic flux increases through the ferritic materials, the parts become saturated, creating a greater magnetic force. The latching circuit incorporates permanent magnets, which requires zero power to stay in the retracted position (position depicted in Figure 1). Adversely, the binary magnetic circuit requires constant power to stay retracted. Magnetic modeling enables the magnetic performance, weight and material selection to be tailored to specific requirements.