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Inertial fuel switch in a car: what is it for and how to use it?

  • July 19, 2022
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Every car is a vehicle that poses an increased danger to pedestrians, other road users and the driver himself. That is why car manufacturers are constantly concerned about

Inertial fuel switch in a car: what is it for and how to use it?
Every car is a vehicle that poses an increased danger to pedestrians, other road users and the driver himself. That is why car manufacturers are constantly concerned about safety as much as possible. For example, cars have an inertial fuel switch. The AvtoVzglyad portal has discovered what it is for and what to look for.

An inertial fuel switch is found in many cars. In older models, it is presented in the form of a mechanical button. In modern cars, this is a really smart sensor controlled by an electronic control unit. What function does it have?

Both minor and more serious accidents can occur on the road. And in the second case, fractions of seconds can decide whether those who got into it will live or not. The point is that the risk of a car catching fire in a violent collision is extremely high. And car manufacturers have figured out how to avoid this.

The solution is quite simple: turn off the fuel supply. On older cars, this is done by pressing a special button located in the cabin, in the trunk, under the front passenger or driver’s seat, under the hood right next to the fuel pump, at the feet on the driver’s side, or in any other location that worth knowing – this is stated in the vehicle owner’s manual. Pressing this button forces the fuel pump to turn off. Fuel stops flowing through the pipe to the engine, minimizing the risk of fire.

Modern vehicles have an inertial sensor that is activated by a collision or sharp impact, as well as several other potentially dangerous conditions, which send a signal to the electronics to cut off the fuel supply.

Needless to say, it is first necessary to know where such a sensor and the cherished button are located. And second, to be sure of their performance. During the use of the car, they can become clogged or even fail, without identifying themselves in the on-board computer warning system.

It will therefore not be superfluous to check this system a few times a year. Fortunately, this is not difficult to do. It is enough to press the button if the car is old or ask the car service to check the inertia sensor on the computer and start the car. It won’t start, so it’s okay. Otherwise, the sensor must be repaired. Such checks are especially important during the holiday season, when you have to travel long distances by car. Anything can happen along the way, and it’s better to be prepared for it.

Photo: AvtoVzglyad

An inertial fuel switch is found in many cars. In older models, it is presented in the form of a mechanical button. In modern cars, this is a really smart sensor controlled by an electronic control unit. What function does it have?

Both minor and more serious accidents can occur on the road. And in the second case, fractions of seconds can decide whether those who got into it will live or not. The point is that the risk of a car catching fire in a violent collision is extremely high. And car manufacturers have figured out how to avoid this.

The solution is quite simple: turn off the fuel supply. On older cars, this is done by pressing a special button located in the cabin, in the trunk, under the front passenger or driver’s seat, under the hood right next to the fuel pump, at the feet on the driver’s side, or in any other location that worth knowing – this is stated in the vehicle owner’s manual. Pressing this button forces the fuel pump to turn off. Fuel stops flowing through the pipe to the engine, minimizing the risk of fire.

Modern vehicles have an inertial sensor that is activated by a collision or sharp impact, as well as several other potentially dangerous conditions, which send a signal to the electronics to cut off the fuel supply.

Needless to say, it is first necessary to know where such a sensor and the cherished button are located. And second, to be sure of their performance. During the use of the car, they can become clogged or even fail, without identifying themselves in the on-board computer warning system.

It will therefore not be superfluous to check this system a few times a year. Fortunately, this is not difficult to do. It is enough to press the button if the car is old or ask the car service to check the inertia sensor on the computer and start the car. It won’t start, so it’s okay. Otherwise, the sensor must be repaired. Such checks are especially important during the holiday season, when you have to travel long distances by car. Anything can happen along the way, and it’s better to be prepared for it.

Source: Avto Vzglyad

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