An increasingly common feature in recent cars, Start Stop system ´s came about in the 70s with the purpose of turning off a car engine when it’s not required.
Beyond providing fuel savings when driving in cities, there are other benefits to having this system in your vehicle. However, some argue that this system increases engine wear, which may not be true.
Keep reading this article to find out how they work and the problems linked to Start/Stop systems.
What is a Start-Stop System?
Start-stop systems are nothing more than a form of technology that automatically turns off a vehicle engine when it hasn’t been running for a certain amount of time (for example, when stopped at a red light)
However, although the engine is turned off, the car is still running, as are all other functions.
While a car is on standby, spark plugs and fuel injection systems are suspended, although this will vary depending on the type of transmission.
How Does a Start-Stop System Work?
For cars with an automatic transmission, the system is activated when the driver presses down on the brake pedal, bringing the vehicle to a standstill. In cars with manual transmissions, it is activated when the vehicle is placed in neutral. To activate the engine, the driver must simply take their foot off the brake pedal and step on the clutch.
What are the Features of a Start/Stop System?
For this system to work, the car must have the following components:
- Additional sensors;
- More efficient alternator;
- Optimised electrical system;
- Reinforced starter motor;
- Optimised internal combustion engine;
- Battery with a higher capacity (some hybrid and electric cars have a second battery).
How do you Activate a Start/Stop System?
In most cars, to activate the start/stop system, all you have to do is press a button displaying an “A” with a clockwise arrow around it.
You should, however, check your owner’s manual to find out how to activate this feature.
How do you Deactivate a Start/Stop System?
Here are some ways to deactivate the start-stop system:
- Press the button on the dashboard;
- Refer to your owner’s manual;
- Access your car’s dashboard.
The Start-Stop System Doesn’t Work: Now what?
Although each manufacturer integrates distinct security measures into the system, there are common causes for it not to work, such as:
Car Battery
The car battery influences the Start-stop system. If it is worn out, it can cause the system to deactivate automatically.
Electrical Consumption;
Remember that Start-Stop systems are electric. This means that the more electrical components are connected, the more likely they are to stop activating.
If you have your air conditioning or lights on or are charging your mobile phone, the Start-Stop system will stop activating to prevent your car battery from draining.
Seat Belt
Although few people know it, some cars have functions that are deactivated until they detect that seat belts have been buckled. Start-stop systems are an example of this.
Engine Temperature
The car system needs lubrication, refrigeration, and cooling.
As such, if the engine overheats, the Start/Stop may not work to avoid thermal shock.
Steep Slopes
As drivers generally aim to keep their car from slipping backwards on steep slopes, the start/stop system stops working in these cases to allow the engine to keep running until it reaches its destination.
What are the Benefits of a Start-Stop System?
Much more than convenience, this optional system allows you to:
- Save fuel;
- Reduce noise within the vehicle;
- Reduce greenhouse gas emissions.
What are the Disadvantages of a Start/Stop System?
On the other hand, the system presents some downsides, such as:
- Noise when activated;
- Reduced air conditioning capacity;
- A more expensive battery, as more power is required.
Start/Stop System: What is the Long-term Impact on the Engine?
First of all, the starting system for a vehicle with a Start/Stop system is more reinforced than in conventional models. In other words, it is designed to carry out more start cycles.
Then there is the entire electronic system, as well as the controls and sensors for the battery, crankshaft, wheel rotation and neutral, which are supported by software. This way, the programme analyses whether or not there is a need to activate Start and Stop.
Which Start-Stop System Tools are Available in the KROFtools Catalogue?
If you often come across Start/Stop Systems in your workshop, it’s time to invest in tools that are up to the challenge.
As such, you’ll find the following tools in the KROFtools catalogue:
Digital Battery Tester
Use this regulation and testing tool to measure a battery’s charge, capacity, and life. By doing so, you’ll keep track of the status of the starting system, charging system, and the condition of the alternator diodes.
Click on the image to find out more about our Digital Battery Tester (ref. 6163).
Battery Tester With Printer
This device allows you to test various battery standards and print out test reports with personalised user information and in different languages.
Click on the image to find out more about our Battery Tester With Printer (ref. 6164).
What are the Environmental and Efficiency Considerations of a Start-Stop System?
The main environmental benefit of this system is reduced pollutant emissions, such as carbon dioxide (CO2) and nitrogen oxides (NOx), especially when driving in urban traffic.
According to a study by the University of Madrid, a Start-and-stop system reduces CO2 by up to 20% when driving at an average speed of 15.5 km/h.
Nevertheless, the environmental impact of the production and disposal of batteries must be considered, especially if no regulations exist to control this.
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