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AS 0722 B The role of automotive solenoid control valves in modern headlight systems

 

Automotive solenoid valves are electromechanical control elements commonly employed in today’s vehicles. They are primarily involved in the regulating process of fluids or gases like fuel, oil, air, coolant, and hydraulic fluids. The advancements in electrification, emission, and intelligent control in today’s cars have emphasized the need for solenoid valves to guarantee accuracy and efficiency.

This article describes the operational principle and construction of the moveable arm type of fluid pressure sensor and discusses the general applications of the sensor from the engineering or OEM viewpoint and answers various FAQs associated with the sensor.

 

  1. What Is an Automotive Solenoid Valve?=

An automotive solenoid valve is defined as an electrical-to-mechanical conversion device that opens, closes, and controls fluid passage using fluid mechanics principles and the conversion of electrical to mechanical energy through the solenoid coil's magnetic field, which acts on the plunger/armature to achieve this functionality.

Essential features:

Fast response time (milliseconds)

High reliability under vibration & temperature

Compact Design for Vehicle Embedding

Support for ECU control signals

 

  1. Functioning of an Automotive Solenoid Valve

Basic Operating Principle

On receiving electricity, current passes through a solenoid coil.

This produces a magnetic field, which then attracts the plunger.

The status then changes to either open or close the fluid passage.

When the power source is removed, the plunger goes back to its initial position due to a spring system.

 

Common Operational Profiles

Normally Closed (NC) configuration – The valve opens when it is energized.

Normally Open (NO) configuration – The valve closes when it is energized.

Proportional Solenoid Valve - The flow rate is varied through the current.

PWM Control Valve - The duty cycle is varied by the Engine Control Unit (ECU).

    Product Description

    Brand Dr. Solenoid Model Number AS 0722
    Rated Voltage (V) DC 12  V ,16V or 18V  Rated Power(W) 7.2 ---10 W 
    Work Mode Push & Pull Frame type RoHS  Compliance
    Stroke(mm) 3-6 MM or Customized Reset Time(s) 1 S  on 3 S off
    Service Life 200 Thousand Times Certification CE,ROHS,ISO9001,
    Material Carbon Steel Housing Lead Wire Length(mm) 200
    Install Style mounted screw hole for easy set up Tolerance of Dimension  +/-  0.1 MM 
    Suctioin Force   1000 GF Insulation Class H 180 Degree
    Hi-Pot Test AC 600V 50/60Hz  1s Non-excitation Holding Force 0
    Working Temperature -10°C-100°C Duty Cycle 1-100%
    Thread Depth(mm) / Payment Term TT, or LC At Sight  
    Sample Order Yes Warranty 1 Year
    MOQ 1000 pcs Supply Ability 5000 pcs per Week
    Delivery Time 30 Days Port of Loading shenzhen

    Product detail diagram

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    Selection Factors for Automotive Solenoid Valves

    In selecting a solenoid valve to be used in automobiles, certain parameters need to be taken into consideration, namely:

    Rated voltage plays an important role and involves not only 12V and 24V but also higher voltages used in electric vehicles.

    Pressure and flow rate are also very essential.

    Response times and duty cycles also need consideration.

    Fluid compatibility is a requirement.

    Temperature range is normally -40°C to +150°C.

    The protection level of IP, such as IP67 or IP69K, matters.

    Lastly, it is important to follow the automotive standards of AEC-Q, ISO, and OEM requirements.

    FAQ - Automotive Solenoid Valve

    Q1: What is the typical voltage of automotive solenoid valves?

    In most cases, automobile solenoid valves function on 12V DC power, but for commercial vehicles, the power could be 24V DC. The electric vehicles could probably employ driver modules working on higher voltages.

    Q2: How do on/off solenoid valves differ from proportional solenoid valves?

    On/off valves are operated either to open or close.

    Proportional valves, however, vary flow rate constantly, as a function of the prevailing input.

    Q3: How long do automotive solenoid valves usually last? They tend to last for millions of cycles depending on factors such as duty cycle, temperature, and fluid cleanliness.

    Q4: Can solenoid valves be used for continuous duty applications? "Yes, but they have to be designed for continuous duty applications (100% ED) with appropriate thermal management."

    Q5: What failures occur in solenoid valves used in cars? The common causes include overheating, contamination, improper voltage, and seal deterioration