Sylvie Willis
The Auto Start/Auto Stop (AST) technology is a system that shuts off a vehicle's engine when it's idle to save fuel and reduce emissions. It's designed to automatically turn on when you press the accelerator pedal again. The concept of the stop-start system is to cut fuel use and eliminate idle emissions. The amount of fuel saved depends on the type of car and driving habits. For example, a Jaguar F-Type R with the system off consumed 4.1 gallons and 3.6 gallons with it on, a reduction of 10.9%. A Mini Cooper with the system off used 2.7 gallons and 2.6 gallons with the system on, a modest fuel saving of 2.9%.
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What You'll Learn
Auto Start/Stop technology can save up to 15-20% of fuel
Auto Start/Stop technology is designed to improve fuel efficiency and reduce emissions. The system automatically shuts off the engine when the vehicle is idling, and restarts when the driver lifts off the brake or engages the clutch. The basic principle is that idling wastes fuel, so cutting fuel use when the car is stationary makes sense.
The technology has been available for some time, but it is becoming more common, and is now found on vehicles with conventional engines, not just hybrids. It is particularly popular in Europe, where fuel costs are higher.
The amount of fuel saved depends on the driver's habits and the type of car. If a car is frequently idling, for example in heavy traffic, then the savings will be greater. A study by the Society of Automotive Engineers found that using start-stop can see a car's fuel economy improve by over eight percent in heavy traffic. Another study, by Transport Energy Emission Research, found that Australian passenger vehicles idle for about 20 per cent of the time they are running, so this extra fuel consumption could add up. Auto Start/Stop technology can save up to 15-20% of fuel, but only in certain conditions. For example, if a person starts their car at idle speed during rush hour traffic or at a stoplight, they will see significant savings. When a vehicle is travelling long distances, the system isn't used and therefore doesn't save any fuel.
There are two types of Auto Start/Stop technology. One uses a timer and will stop the engine when the car is parked for more than 10 seconds. The other uses acceleration sensors and is less accurate, stopping the engine when the driver has stopped accelerating for a specified amount of time.
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Fuel savings depend on the driver's type of car and their driving habits
The Auto Start/Auto Stop (AST) technology is a system that shuts off a vehicle's engine when it's idle to save fuel and reduce emissions. It is designed to automatically turn on when you press the accelerator pedal again. The idea behind this technology is that if you keep your car idling, you're wasting gas.
The fuel savings offered by AST will vary depending on the driver's type of car and their driving habits. For example, if a person starts their car at an idle speed during rush-hour traffic or at a stoplight, they will see significant savings in fuel consumption. On the other hand, when a vehicle is travelling long distances, the system isn't used at all and therefore doesn't contribute to any fuel savings.
A study by the Society of Automotive Engineers found that using start-stop can see a car's fuel economy improve by over eight percent in heavy traffic. This may not sound like a lot, but over time, it adds up to a whole lot of wasted gas. In addition, a Transport Energy Emission Research study found that Australian passenger vehicles idle for about 20 per cent of the time they are running, so this extra fuel consumption could eventually add up.
It is important to note that the Auto Start/Stop technology is not a fuel-saving solution but an emissions-saving one. It can help prevent emissions from the tailpipe, such as carbon monoxide and harmful hydrocarbons, from being released into the environment.
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Auto Start/Stop systems are designed to reduce emissions
The automatic start/stop function turns off the engine when the vehicle is idling, cutting fuel use and eliminating idle emissions. This technology is designed to handle the repeated starting and stopping of the engine. The basic logic is that if a car is idling, it is wasting fuel and contributing to increased emissions and urban pollution. By some estimates, the effects of start-stop systems can reduce fuel consumption by anywhere from 7 to 26 percent, depending on traffic patterns. For instance, in one test, a Jaguar consumed 4.1 gallons with the system off and 3.6 gallons with it on, a reduction of 10.9%.
The start-stop system has become increasingly popular due to fuel economy and emissions regulations. The system is often complemented by regenerative braking technology, which captures kinetic energy during braking and converts it into electrical energy that can be stored and reused, reducing the overall demand on the engine and lowering fuel consumption and emissions.
The start-stop system was first introduced in the six-cylinder Toyota Crown in 1974, claiming a 10% gas saving in traffic. Since then, it has been included in various vehicles, such as Citroën, Land Rover, Peugeot, Smart, Volvo, Fiat, Nissan, and Volkswagen. While the system offers fuel savings and reduces emissions, some drivers find it irritating and claim that it causes sluggish acceleration and disrupted air conditioning.
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Constantly stopping and starting your engine can damage its parts
The automatic start/stop function is designed to shut off the engine when the vehicle is idling or at a standstill, such as at a stoplight. This technology aims to reduce fuel consumption and eliminate idle emissions. While it is effective in achieving these goals, there are concerns about the potential impact on engine components due to frequent stopping and starting.
Some people argue that constantly stopping and starting the engine can cause extra wear and tear on certain parts, especially if the engine is not designed for this type of usage. The starter motor, for example, is expected to experience more frequent use and may wear out faster over time. Similarly, the additional stress on the engine from taking off immediately after a dead stop can be demanding, as the oil may not be circulating adequately yet.
However, automotive manufacturers claim that modern vehicles are designed to handle the repeated starting and stopping of the engine. For instance, some cars utilize a separate battery for the start/stop function, ensuring that the main battery remains dedicated to other essential tasks. Additionally, advancements in battery technology have resulted in longer-lasting batteries, such as AGM batteries, which can better withstand the demands of start/stop systems.
Furthermore, improvements in engine oil have led to the development of slicker, stickier oils that remain on the moving parts even when the engine is stopped for extended periods. This innovation helps mitigate the potential damage caused by frequent stopping and starting. Nevertheless, it is essential to adhere to the recommended service schedule and use the manufacturer's suggested oil type to ensure optimal performance and minimize potential issues.
While the start/stop function can provide fuel savings and environmental benefits, it is essential to consider the potential impact on specific engine components. Regular maintenance and adhering to the manufacturer's guidelines can help mitigate any potential issues arising from frequent engine stopping and starting.
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Auto Start/Stop systems are gaining momentum
Auto Start/Stop systems are designed to shut off a vehicle's engine when it is idling, thereby saving fuel and reducing emissions. The system automatically turns the engine back on when the driver lifts their foot off the brake or presses the accelerator. This technology first began to show its worth in the 1990s, appearing in cars such as the Volkswagen Polo '3L' and the Audi A2 '3L'. These cars were the first in production to use as little as 3.0L/100km, in part thanks to the start-stop system.
In recent years, start-stop systems have been gaining momentum, with an increasing number of new cars being equipped with this technology. This includes vehicles with conventional gasoline engines, such as the best-selling 2015 Ford F-150, as well as hybrid models. The growing popularity of start-stop systems can be attributed to their potential fuel savings and environmental benefits.
The effectiveness of start-stop systems in reducing fuel consumption varies depending on driving habits and the type of car. For example, during EPA fuel mileage testing, there is a significant amount of idling time, and a start-stop feature can produce an artificially high MPG rating. In real-world driving, however, there may be minimal idle time, resulting in less significant fuel savings. Additionally, the constant starting and stopping of the engine can increase maintenance costs and potentially shorten engine life.
Despite this, start-stop technology can still offer fuel savings in certain conditions, such as when a vehicle is idling in rush-hour traffic or at a stoplight. In one test, a Jaguar F-Type R with the system on consumed 3.6 gallons of fuel compared to 4.1 gallons with the system off, resulting in a 10.9% reduction in fuel consumption. Another test on a Mini Cooper with the air conditioning on showed a 2.9% improvement in fuel economy with the system on, increasing to 9.5% when the air conditioning was turned off. These results highlight the potential for fuel savings with start-stop technology, especially in congested areas with frequent stops.
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Frequently asked questions
Yes, auto start/stop technology can save up to 15-20% of fuel, but only in certain conditions. For example, if a person starts their car at idle speed during rush-hour traffic or at a stoplight, they will see significant savings in fuel consumption.
Auto start/stop systems shut off a vehicle's engine when it's idle to save fuel and reduce emissions. The system is designed to automatically turn on when you press the accelerator pedal again.
In addition to saving fuel, auto start/stop can help prevent emissions from the tailpipe, such as carbon monoxide and harmful hydrocarbons, from being released into the environment.
The constant starting and stopping of a vehicle's engine may harm the car and negatively impact the environment. Additionally, battery power is consumed at a much higher rate, which can become expensive to maintain.
