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Topic: Vehicle Stability Control

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Traction control

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Traction control

	Howstuffworks "Stability Control"
		A stability control system uses several sensors to detect a loss of traction in your vehicle, then works with the antilock brake system to apply individual brakes to help keep the vehicle on its intended path.
		Stability control pulsates the brakes of individual wheels to help "rotate" the vehicle to the driver's intended path.
		Stability control is an important safety feature on today's vehicles, so make sure the vehicle you are considering has it.
	auto.howstuffworks.com /28001-stability-control.htm (457 words)

	CanadianDriver: Auto Tech - Vehicle Stability Control Systems
		Stability control is the third step in electronic systems that help us control our vehicles.
		AdvanceTrac, the stability control option on the 2001 Ford Focus is the first system offered on an economy car, and it brings vehicle stability controls within the financial grasp of the majority of the buying public.
		Stability control systems are especially beneficial on wet, snowy, or icy conditions, although they do offer handling benefits during emergency maneuvers on dry pavement.
	www.canadiandriver.com /articles/jk/at_010320.htm (737 words)

	Stability Control: Get Your Yaw-Yaws Out! (Site not responding. Last check: 2007-10-12)
		Stability control is actually the latest in a series of braking-related developments that began appearing in production vehicles in the 1980s.
		As you can imagine, stability control systems are particularly effective in inclement driving conditions, where the roadway may be covered with rain, ice or snow and the normal friction between the tires and the road is reduced.
		Stability control represents one more example of the significant impact advanced electronics are having on the automobile.
	www.edmunds.com /ownership/safety/articles/45992/article.html (1444 words)

	Hybrid Vehicle Dynamics
		The ECB's linear hydraulic pressure control determines the difference between the actual and target hydraulic pressure (which is added to the feedback term) and the valve-opening current that varies with the difference in pressure upstream and downstream of the valve (and added to the feed-for-ward term).
		Furthermore, because the amount of control itself is minimized and the control converges quickly (Figures 8c and d), smoother driving is realized, while the vehicle deceleration that occurs when the control steps in is kept to a minimum.
		Although the VSC system can control drive torque within an acceptable deviation between a target yaw rate (required by the driver) and the actual yaw rate generated by the vehicle, the new VDM system achieves smoother cornering start-off performance, with motor control beginning in the normal operating range.
	www.saeindia.org /Home/hybridvehicledyamics.htm (1293 words)

	Toyota.com : Moving Forward : 2005 : January : Star Safety System
		VSC technology helps prevent two factors that frequently cause drivers to lose control of their vehicles: front-wheel slip and rear-wheel slip.
		Vehicle Stability Control would detect a difference between where you're trying to go and where you're actually going, and the system would then recognize that you're about to lose traction.
		If a vehicle without Traction Control were backing out of a driveway and encountered a mound of snow, wheelspin might occur and the vehicle could come to a stop.
	www.toyota.com /html/movingforward/2005/january/starsafety.html (1027 words)

	Mandatory Stability Control - MSN Autos
		Electronic stability control that seeks to automatically reduce speed and judiciously apply braking power to one or more wheels to avoid a skid and loss of driver control isn't exactly new, especially to buyers of luxury Mercedes-Benz vehicles.
		A study from Germany early this decade confirmed the benefits of stability control: Mercedes cars with this technology were involved in 15 percent fewer crashes than vehicles that didn't have stability control.
		There are no additional maintenance requirements for stability control, which basically piggybacks on sensors in a vehicle's four wheels that operate the anti-lock brake system and also can intervene on throttle control.
	autos.msn.com /advice/article.aspx?contentid=4024270 (950 words)

	Vehicle Stability Control Expands Throughout The Toyota Lineup
		The VSC system is designed to help reduce lateral skids through active control of the brakes and engine output, such as when the driver steers abruptly, or when turning on slippery road surfaces.
		In cases where the vehicle skids toward the outside of the curve, braking on the rear inner wheel and reduced engine power are applied.
		The VSC system also includes a slip indicator, which beeps to warn the driver the tires are about to exceed the grip limit.
	www.carbuyersnotebook.com /archives/2006/09/vehicle_stabili.htm (455 words)

	Stability system called best thing since seat belts
		The system, known generically as electronic stability control, is as important a safety device as seat belts and air bags, the Insurance Institute for Highway Safety said in a study released today.
		The stability control system could reduce "the risk of fatal vehicle rollovers of SUVs by 80 percent, 77 percent for cars," and could cut fatalities in vehicle crashes of all kinds by nearly a third if it were standard on all cars, trucks and SUVs, the institute said.
		Stability control systems use computerized electronic sensors to detect when a car veers sharply and when a driver is about to lose control because the car has started "straying from the intended line of travel," the insurance institute said.
	www.sfgate.com /cgi-bin/article.cgi?file=/c/a/2006/06/13/MNG7UJD1451.DTL (972 words)

	Electronic Stability Control at AllExperts
		Electronic Stability Control (ESC) is the generic term for systems designed to improve a vehicle's handling, particularly at the limits where the driver might lose control of the vehicle.
		ESC also integrates all-speed traction control, which senses drive-wheel slip under acceleration and individually brakes the slipping wheel or wheels, and/or reduces excess engine power, until control is regained.
		ESC combines anti-lock brakes, traction control and yaw control (yaw is spin around a vertical axis).
	en.allexperts.com /e/e/el/electronic_stability_control.htm (948 words)

	[No title]
		By integrating braking and damping, these vehicles are able to maintain their luxury comfort with the added ability to instantaneously transform the ride authority to sports car-like handling.
		The result: better control and ride comfort; and a more seamless transition between regular and emergency driving that is consistent with the brand character of the car.
		Presently, vehicle stability control systems are designed to react only during emergency driving situations, applying the brakes to help maintain control.
	www.emailwire.com /news/aut2363.shtml (983 words)

	UM Electrical Engineering and Computer Science (Site not responding. Last check: 2007-10-12)
		Vehicle stability control systems provide vehicle stability and handling predictability through the interaction of multiple chassis actuators.
		Currently, the external inputs to a vehicle stability controller generally consist of a steering wheel angular sensor, yaw rate sensor, and lateral accelerometer.
		A vehicle stability control system that knows road bank angle has an advantageous capability in achieving desired control sensitivities for maneuvers on ice and snow, among all surfaces, while avoiding false/nuisance activation on a banked road.
	www.engin.umich.edu /center/controls/W01/Tseng.html (276 words)

	ConsumerReports.org - Safety features to look for 11/06 (Site not responding. Last check: 2007-10-12)
		Electronic stability control started on luxury cars and has been catching on for the past few years.
		To help consumers identify the system in a vehicle's features list, the Society of Automotive Engineers has asked that all manufacturers use electronic stability control or ESC, as common terminology when referring to their stability-control systems.
		If a vehicle's air bag is deployed in a collision, the system automatically notifies the dispatch center, locates the vehicle, and sends emergency aid if the driver does not respond to an inquiry.
	www.consumerreports.org /main/detailv4.jsp?CONTENT<>cnt_id=113365&FOLDER<>folder_id=113261&ASSORTMENT<>ast_id=333137&bmUID=1107272987466 (1902 words)

	USATODAY.com - Vehicle stability control gets cool reception in USA (Site not responding. Last check: 2007-10-12)
		That's not far from the situation facing auto suppliers who make stability control systems, which sense when drivers are about to lose control of their vehicles and help them regain it.
		On vehicles with stability control, sensors detect when a driver is about to lose control of a vehicle, and brakes are applied at the necessary wheels to bring it under control.
		Despite what many believe is compelling evidence that stability control works, government regulators aren't endorsing it, safety advocates are pushing vehicle redesigns instead of it, and automakers are slow in installing it.
	www.usatoday.com /money/autos/2003-08-06-rollover_x.htm (909 words)

	Electronic Stability Control
		If the stability control software in the ABS control module detects a difference in the normal rotational speeds between the left and right wheels when turning, it immediately reduces engine power and applies counter braking at individual wheels as needed until steering control and vehicle stability are regained.
		The test is then repeated with stability control engaged and the vehicle remains flat on the ground.
		The first vehicles to come factory-equipped with electronic stability control were the 1995 BMW 750iL and 850Ci models with a 5.4 liter V12 engine.
	www.aa1car.com /library/stability_control.htm (1910 words)

	Integrated Vehicle Dynamics Control (IVDC)
		The objective of the research is to be able to control the vehicle in terms of under- and oversteer under normal and extreme driving manoeuvers.
		The project focusses on the development of a vehicle controller and a state estimator that was implemented and tested in a vehicle equipped with a combined braking and chassis control system to improve handling.
		The vehicle dynamics controller consists of a feed forward body roll compensation and a feedback stability controller.
	www.automotive.tno.nl /smartsite.dws?id=1005 (168 words)

	NHTSA VRTC Crash Avoidance Staff (Site not responding. Last check: 2007-10-12)
		Riley Garrott is the Chief of the Vehicle Stability and Control Division (Crash Avoidance) at VRTC.
		Riley Garrott, Ph.D.;Chief, Vehicle Stability and Control Division
		Riley Garrott is Division Chief of NHTSA's Vehicle Stability and Control Division.
	www-nrd.nhtsa.dot.gov /vrtc/ca/castaff.htm (899 words)

	Carlab Vehicle Dynamics Control
		Several vehicle dynamic control systems are able to improve the lateral dynamics of a vehicle.
		And by controlling the steering angles of the wheels an active steering system has great influence on the lateral dynamic behavior of a car during cornering.
		The objective of the research is to be able to control the vehicle in terms of under- and oversteer under normal and extreme driving maneuvers.
	www.automotive.tno.nl /smartsite.dws?id=1555 (337 words)

	eBay Guides - How to Choose Vehicle Safety Features
		Once you purchase the vehicle, be sure to complete all of the title paperwork and pay any required taxes on the vehicle.
		This may simply be the cost of driving across the city or state if the vehicle is close-by or it may mean working with a shipping company that can transport the vehicle from anywhere in the country.
		While $2,000 may not be a high enough limit for the full purchase price of most vehicles, it's great for deposits (many sellers require a deposit on a passenger vehicle within several days of the close of a listing).
	pages.ebay.com /buy/guides/choose-vehicle-safety-features-guide (3232 words)

	Hot Trends in Today's Cars - MSN Autos
		The cell phone itself can be placed anywhere in the vehicle during this time, even in the glove box or trunk, and phone conversations can continue, uninterrupted, via the driver's cell phone after a vehicle is parked and the driver departs.
		Known as Vehicle Stability Control (VSC) at Toyota, it uses an electronic system that can, in many circumstances, sense a potential skid and work to correct the direction and speed of the vehicle to try to avoid the loss of control.
		However, VSC cannot overcome the laws of physics and correct a situation if a vehicle's speed is too high at the time of impending loss of control, or if the driver is pushing the vehicle to unsafe limits.
	autos.msn.com /advice/article.aspx?contentid=4022270 (1706 words)

	TRW Announces Contracts For Vehicle Stability Control Systems For European And North American Platforms
		In addition to standard VSES components, which include an inertial module and electro-hydraulic control unit, TRW also supplies a pre-charge pump and proportioning valve which are especially important for large vehicles, such as the Suburban, to ensure superior system performance at all operating temperatures.
		TRW Automotive continues to enhance the functionality of its vehicle stability control systems by including new features in the system, such as "panic brake assist" and "hill hold," which will be introduced on major European platforms this year.
		The "hill hold" feature uses the vehicle stability system to maintain a driver-generated brake pressure to prevent the vehicle from rolling on a hill in the time between when a driver releases the brake and drives away -- an automatic transmission-style driving feature for manual transmission vehicles.
	www.prnewswire.com /cgi-bin/stories.pl?ACCT=104&STORY=/www/story/08-07-2002/0001779207&EDATE= (653 words)

	Stability control saves lives
		SC can prevent a severe skid or loss of control by braking individual wheels, thus guiding the car in the desired direction if it senses the driver is in danger of losing control.
		Stability control uses a computer to monitor variables such as individual wheel speed and steering, and it also measures changes in direction.
		This helps it decide whether the vehicle is likely to skid, by comparing the driver's desired course with the actual one.
	www.which.co.uk /press/press_topics/product_news/which_magazine/Stability_control_saves_lives_press_571_62418.jsp (549 words)

	Safercar.gov - Rollover
		Available in many new cars, this technology helps drivers maintain control of their vehicle during extreme steering maneuvers by keeping the vehicle headed in the driver's intended direction, even when the vehicle nears or exceeds the limits of road traction.
		It would be unlikely, however, for an average driver to properly apply countersteering techniques in a panic situation to regain vehicle control.
		ESC cannot increase the available traction, but maximizes the possibility of keeping the vehicle under control and on the road during extreme maneuvers by using the driver’s natural reaction of steering in the intended direction.
	www.safercar.gov /rollover/pages/NewTechESC.htm (286 words)

	Lexus GS - Features & Pricing - Safety
		The GS 350 is equipped with Vehicle Stability Control (VSC) [2] and Traction Control (TRAC).
		If the vehicle skids during a turn, VSC can apply individual brakes and reduce engine power to help you stay on course.
		Factors including speed, road conditions and driver steering input can all affect whether VSC will be effective in preventing a loss of control.
	www.lexus.com /models/GS/features/safety/vehicle_stability_features.html (267 words)

	Behind the Wheel: 'Get used to' deviated steering wheel (Site not responding. Last check: 2007-10-12)
		Stability control helps when you're going into curves and around corners, or coming out of them.
		The bottom line is you need stability control as well as traction control, which prevents wheel spin when you hit a slippery surface by cutting the engine power, applying the brakes and putting more power to the other wheel, which has more grip.
		The ideal situation is all-wheel drive with both traction control and stability control.
	www.post-gazette.com /pg/05293/591531.stm (433 words)

	How It Works: Stability Control Brings Stability to SUV Segment - Cars - Blogs.ca
		Electronic stability control (ESC) systems are already commonplace among the luxury car set, and are now becoming more and more available on entry-level vehicles as well, especially SUVs.
		Similarly, if a vehicle is understeering, or pushing forward on the front wheels, breaking traction and potentially causing an unintentional lane change, ESC will apply the brakes to the inside wheels to pull the car back into its lane.
		Certainly there are variations in the way the systems are programmed to respond to a loss of control, with some stability control systems activated sooner than others and some still that will cause a vehicle to slow down faster when needed, but that’s about it.
	cars.blogs.ca /2006/04/10/how-it-works-stability-control-brings-stability-to-suv-segment (853 words)

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