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While wheel alignment and balance both contribute to a smoother ride, the services are quite different. A wheel alignment makes sure your tires contact the road in the correct way... Have you ever been confused as to the sounds coming from your vehicle when you brake? From grinding and rattling to thumping and squealing, you can learn how to decode... Let’s analyze what is happening with our system for different conditions of input and disturbance.
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Cruise control offers several benefits to drivers, especially during long road trips or highway driving. While driving through the city, you’ll face a number of stop lights and stop signs that will require manual braking. Heavy, or stop-and-go traffic is not ideal for safely using cruise control. When engaging cruise control on the highway, ensure your lane is clear and there are no vehicles stopping ahead.
Cruise Control Acceleration and Deceleration
Plus, some ACC systems can even handle stop-and-go traffic, bringing your car to a full stop and then picking up speed again when traffic gets moving. Cruise control systems, even adaptable cruise control, may not always detect these streets correctly, causing accidents. After turning on cruise control, you’ll need to set your desired speed. Many systems set the cruise control at the current speed, while others require you to manually set one. You can increase and decrease this speed as needed without interrupting the mechanism.
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To prepare (compensate) for the additional opposing force, at the beginning of the hill, the driver will press more the accelerator pedal which will increase the torque of the engine (input). The positive road gradient causes an additional opposing force on the vehicle which should cause vehicle slowdown. The cruise control function reads the current vehicle speed and increases the engine torque in order to compensate for the road gradient. This way the vehicle speed is kept constant regardless of the disturbance. Two companies are developing a more advanced cruise control that can automatically adjust a car's speed to maintain a safe following distance. This new technology, called adaptive cruise control, uses forward-looking radar, installed behind the grill of a vehicle, to detect the speed and distance of the vehicle ahead of it.
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For instance, if the vehicle in front of you slows down/speeds up, a car with adaptive cruise control will reduce speed/accelerate automatically without any external inputs. It is a system that accurately maintains the speed set by the driver without any external intervention. It automatically controls the speed of a car and only allows the vehicle to hit a speed set by the driver. You can even find this feature in the top-spec variants of some of the affordable hatchbacks and sedans.
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Instead, the ACC system will hold the pre-set speed until you change it, or it catches up with another vehicle. According to the Department for Transport, driving at a steady speed of 50 mph instead of 70 mph can improve fuel economy by 25%. The primary function of cruise control is to make driving more comfortable, but by smoothing out acceleration and deceleration you can save fuel too. Modern-day cruise control was invented in 1948 by blind American mechanical engineer Ralph Teetor, although speed control has its roots in the 18th century when it was used to regulate steam engines. Cruise control is one feature you’ll want from a good car for road trips and other frequent highway driving.
But cruise control actuates the throttle valve by a cable connected to an actuator, instead of by pressing a pedal. The throttle valve controls the power and speed of the engine by limiting how much air the engine takes in (see How Fuel Injection Systems Work for more details). But with the advent of technology in the automotive industry, the cruise control system in modern cars entirely relies on electronics. Instead of a cable, the system now communicates with the throttle via various sensors connected to a computer (ECU - Electronic Control Unit). So, when you set a speed, the ECU calculates the throttle position and engages the throttle wirelessly.
Does cruise control use more gas?
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If the car begins to slow down because of an incline (e.g. going up a hill), the system will open the throttle to accelerate. Conversely, if the car starts to speed up due to a declin (e.g. going downhill), the system will close the throttle to decelerate. Cruise control is a handy feature for drivers that allows you to maintain a constant speed without having to keep your foot on the gas pedal. In this post, we'll explore how cruise control works, its benefits, and how to use it safely to make your driving experience more comfortable.
Using cruise control also reduces wear and tear on both your engine and transmission by running things more smoothly and steadily, and reducing workload on both components. Drivers who have the most difficulty managing their cruising speed could be using 60 per cent more fuel than they need to. Because you don’t have to keep your foot on the accelerator, it’s easier to nod off – and lose control of your vehicle. Cruise control is designed to be used on A-roads and motorways that don’t have frequent stops and turns to negotiate. Founded in 1937, Progressive is the third largest personal car insurer in the U.S. with over 26 million drivers enrolled. Life Lanes helps you do just that, from owning a car and home to other life moments and adventures.
Safely navigating certain slippery or dangerous driving conditions requires careful manual control of your vehicle’s throttle, and in these situations, you’re best to leave the cruise control off. In many cases with modern cars, it’s generally easier and more cost effective to just opt for a unit equipped with cruise control from the factory. Cruise control is widely available as standard equipment on most modern vehicles. Once familiar with your car’s cruise control system, you can try it out.
But instead of pressing the accelerator pedal, it uses a different mechanism to maintain a constant cruising speed. It can also help you do your part to maintain the steady and efficient flow of traffic. While cruising, even a highly competent driver who isn’t using cruise control will tend to slow down and speed up in a repeated cycle, possibly several times per minute. Though fluctuations in speed may be slight, they do cause your engine to use more fuel than required.
But installing such a kit becomes almost impossible in modern cars due to the complex electronics. Step 5 - If you wish to accelerate when the cruise control is engaged, you can press the ‘+’ button on the steering wheel to briefly engage the accelerator pedal. Step 1 - Before activating cruise control, build up speed by accelerating the car.
For example, if the road gradient is 5 ° we’ll give an additional 1500 N to the wheel in order to compensate for the disturbance. Instead of engine torque as an input we are going to use the traction force. This is a valid approach since the traction force applied at the wheel is directly proportional with the engine torque.
The below table highlights the key differences between cruise control and adaptive cruise control. Justin has written one of the largest collections of used car buyer guides on the internet, and his TV program, AutoPilot, has aired over 600 episodes across 16 seasons. With 4 years as co-chair of the Canadian Car of the Year Awards (CCOTY) program, a passion for vehicle testing shines though in all of his work. Depending on the year, make and model, cruise control may be available for add-on or retrofit. Professional installation is recommended, and you’ll want to talk to a professional about the specific availability of parts and integration for your vehicle.
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