ISC Mobile - Definition, Characteristics, and Functions
Technology has developed quite rapidly today, including in the automotive field, especially cars. A few years ago, you would still encounter car engines with carburetors and there were screws to manually adjust the idle.
Now, ISC has come automatically, so what is ISC in cars and what are its functions? Let's check the complete review below!
What is ISC in Cars?
Car engines must have a stable rotation speed to avoid sudden shutdowns, especially when the car AC is used. Therefore, modern car manufacturers have equipped their products with automatic Idle Speed Control adjustments.
This part is vital, so it can still be found in cars with manual carburetor engines. The main function of this ISC is to regulate the engine's rotation speed stably and to control the amount of air entering or exiting.
Air can enter or exit through valves that open and close automatically. Not only that, but these valves can also determine the direction of air to be channeled to the parts of the car that need it.
The performance of this ISC certainly does not work alone; the valves can open and close due to commands from other parts. That part is the AC when you turn it on and the air inside becomes too vacuum.
The car's ISC is an important part to address that vacuum air, so the ECU commands the valve to open and air can enter through it.
The need for air is also determined by the ECU, so this part must not experience problems or obstacles. The car engine can operate stably because the incoming air is sufficient, then the ECU will command the outtake valve to close again.
Thus, the ISC has worked optimally to keep the engine's rotation speed stable.
Signs of a Damaged Car ISC
To keep the system in the car functioning well, you need to know the signs given by the ISC when it experiences problems. The first sign is indicated by unstable engine revolutions, especially when the engine is running at low speeds.
You can feel this when the engine RPM suddenly rises and then drops significantly.
Another sign you may feel is that the engine vibrates when running at low speeds. This is caused by the engine's rotation speed suddenly increasing, even though you are not pressing the gas.
The condition of this sign of a damaged car ISC occurs when the engine's rotation speed suddenly drops drastically, causing the car to shut down suddenly.
The second sign to watch out for is that the engine's rotation speed also suddenly drops when you drive it normally.
At normal speeds, the car's RPM should also be stable because the ISC can perfectly regulate the air intake and exhaust. However, that condition is not what you obtain and it can stop when you fix it. Here is how to fix a damaged car ISC.
Another common occurrence is that your four-wheeled vehicle's engine often shuts down suddenly. This condition is worsened when you turn on the AC during the trip, causing the ISC not to open the valve perfectly.
The air inside is too vacuum, making the engine rotation imperfect and dangerous for the driver.
This is also caused by the engine load increasing when the AC is turned on. The engine's performance is divided between running the car and turning the AC compressor, so the ECU cannot send commands accurately to the ISC.
This sign of a damaged car ISC actually causes your four-wheeled vehicle's engine to shut down quickly while driving.
Functions of Car ISC
The very vital function of this part helps the engine warm up quickly in the morning, as it can raise the RPM to 2000. You just need to start the engine, and the ECU will send a command to the ISC to increase the engine's rotation speed higher.
This is also triggered by the amount of air that can enter the intake tube. It is important to regulate the incoming air when the speed decreases gradually. The car engine must remain stable, so the incoming air must be adjusted to avoid excess.
Thus, the ECU will send a command for the valve to close so that the incoming air is not too much, as well as when the air from inside is expelled through the outtake valve.
When the AC is turned on, the engine load increases because it has to turn the compressor. At that moment, the ECU sends a command to the ISC to allow more air to enter its tube.
This function of the car ISC can reduce the engine load, thus not causing vibrations that are quite disturbing for passengers.
Having a vehicle in this modern era means that the product you own has switched to an injection system.
The advantage of this system is that it is equipped with ISC that can automatically regulate the air intake and exhaust into the engine. The valves can open and close so that the engine's performance is not too heavy, especially when the AC is used.
Read also: Causes of ISC Not Functioning
