China Solenoid

A starter solenoid operates to transfer the large amount of power within the vehicle's battery to the vehicle's starter motor. Within the solenoid are two large metal contacts. When the ignition key is turned to activate the starter, these two contacts come together, thereby transferring the current from the battery to the starter. Starter solenoids are relatively easy to test, but it is important to first ensure that the battery is in good working condition.

Most vehicles use a starter-mounted solenoid that functions as a high power switch to connect the starter drive pinion gear with the flywheel to start the engine. Most on-starter solenoids are easy to wire as you mount the starter on the engine. Other solenoids--mostly on Fords--are remote mounted. These solenoids are located in the engine compartment close to the battery, which makes it much easier to wire. Whether you have an on-starter or remote-type solenoid, follow these steps to wire the unit in a matter of minutes.

Jump-starting a car with a solenoid, which is a switching mechanism that sends a 12-volt current to the starter, should be approached with caution. When the car battery is dead, turning the ignition switch may cause a rapid clicking sound. This is the solenoid opening and closing as it tries to deliver current to the starter. If the solenoid is bad, you won't hear any clicking. Bypassing the solenoid may enable you to jump-start your car, but precautions are necessary. This article explains how to do it and offers safety tips.Step 1Locate the solenoid on the car's electrical system. It is typically a small cylinder or box near the starter or battery cables.Step 2Find the primary side of the solenoid with a small terminal t

Richard Connell, Senior Designer at BLP in Newmarket, offers some insights into selecting and designing-in a solenoid while avoiding the most common pitfalls.

The solenoid is a key component in countless products from automotive and safety switches to vending and games machines. Designing-in one of these devices is unlikely to pose any great difficulties, provided you approach the task correctly.
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The general purpose of the starting system is to rotate the engine and allow it to start. This system is comprised of a starter motor, a solenoid, wiring harness/cables and the battery. The battery provides electrical current to the solenoid, which passes the current to the starter motor and rotates the engine so it will start. If you turn the ignition switch to the on position and the car doesn't start, the trouble source is probably the starter solenoid. Replacing the solenoid can be completed in an afternoon with a few simple tools.

1. Solenoid is the generic term for a coil of wire used as an electromagnet. It also refers to any device that converts electrical energy to mechanical energy using a solenoid. A device that creates a magnetic field from electric current and uses the magnetic field to create linear motion. Common applications of a solenoid are to power a switch, like the starter in an automobile, or a valve, such as in a sprinkler system.
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Owners of some cars are inconvenienced by only being able to open their trunk with a key. No doubt, many would like the convenience of being able to pop open the trunk from the driver's seat. This can be done by the addition of a solenoid. A solenoid is a motor or heavy duty actuator that pulls. When installed properly it can pull the manual release mechanism of the trunk.

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Varying the current applied makes it possible to use a smaller solenoid. To prevent the winding from overheating the current is limited by a resistor after the plunger reaches the end of the stroke. This circuit cannot be used with high operating frequencies. The size of the dropping resistor depends on the resistance of the winding.

There are three ways of damping solenoids:

12.1. Damping by Ohmic resistance
A parallel resistor can be used to limit the voltage surge that occurs when the power to the solenoid is cut off. As a result, however, the drop-out time increases as does the power requirement. Both are reduced as the parallel resistance is reduced.