What is Stop and Start Engine System? How Does the Stop Start System Work?

The Stop and Start Engine System is a  technology that allows the engine to be switched off automatically when the car stops,  for example, at a traffic light. Thanks to this, it is possible to save energy and reduce carbon emissions.

How Does the Stop Start System Work?

The study entitled  Influence of the start-stop system in the vehicle regarding the durability of the accumulator battery  (Madrid, 2018) explains how the Start Stop system worksAs soon as the speed is reduced, the battery power is cut off, and the combustion engine shuts down without producing a spark.  

During this rest period, the rest of the electrical functions depend on the battery.; to resume movement, the current from the same battery reactivates the starter motor. Now, what tells the battery that you want to start the movement? Depending on the car model, power is reset when the brake is released, the clutch is pressed (mechanical), or the brake is released, and the accelerator is applied (automatic). The Bosch company also ensures that vehicles with a Start Stop system require more powerful batteries, as the requirement to start up after each rest cycle is greater. In addition, they have speed sensors to determine when the engine should be turned off.

Advantages of the Stop and Start Engine System

Vehicles with a Stop and Start Engine System offer various benefits, both for you and for the environment:

Carbon footprint reduction

According to  País Circular, transport represents 31% of the total annual carbon emissions in Chile. At the same time, figures from the European Parliament indicate that private cars are responsible for 60.7% of the emissions emitted by transportation systems in the Old Continent. From this perspective, by using the Start Stop, you reduce the carbon emission of your car by between 5 and 10%,  since no gases are released during the rest phases.

Fuel savings

No fuel is consumed during idle cycles with the engine off, unlike in conventional systems, which use fuel at idle. According to the RACE, depending on the distance traveled and the number of stops, this saving is between 8 and 15%.

Automatic start

As soon as you want to restart, press the accelerator or release the brake. At the same time, startup is silent and vibration-free in less than a second, which is much more convenient than doing it manually.

Electrical utilization

Even if the engine dies, you continue to enjoy other car functions, such as air conditioning, radio, or geolocation devices. All this is possible thanks to the electrical supply offered by the battery.


The Start Stop system improves the vehicle’s performance and its elements, such as the efficiency of the catalytic converter and the spark plugs, since these reduce carbon deposits. This results in savings when it comes to maintaining your car.

Convenient Connection

In any vehicle with this system, it is possible to switch off the function on the dashboard to be used only when you need it. Very comfortable, suitable? The Start Stop system is a technology that allows you to save fuel while helping to reduce the carbon emissions emitted by your car. It gives you the convenience of shutting down and starting in just seconds and through simple actions like slowing down and depressing the clutch. This makes it an excellent option to improve performance without affecting the comfort that your vehicle offers.

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