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Topic: Active Torque Transfer System

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	Honda Prelude - Wikipedia, the free encyclopedia
		The four wheel steering system on the third generation prelude was an extraordinary piece of engineering in itself.
		As of 2006, it is the only four wheel steering system on a production car that is entirely mechanical in its design; that is, there is always a direct mechanical connection between the steering wheel and the rear wheels.
		The Active Torque Transfer System (ATTS) as used in the fifth generation Prelude.
	en.wikipedia.org /wiki/Honda_Prelude (2009 words)

	Automotivetalk : Lets talk about Automotive: November 2005
		Both systems are slightly biased, with 52 percent of the torque normally going to the rear tires and 48 percent to the front.
		The system is calibrated to offer more control of the vehicle under a variety of conditions, and to operate in a manner that is not intrusive in normal or spirited driving.
		The Four-C active suspension system is a plus as it continuously adjusts the damping rates in the shocks so that the wheels stay in better contact with the ground for improved handling while also delivering a nicer ride.
	automotivetalk.blogspot.com /2005_11_01_automotivetalk_archive.html (14027 words)

	2002 Acura DN-X Concept Car (Site not responding. Last check: 2007-11-03)
		Also unique to the DN-X are new drive-by-wire systems that control throttle, brake and steering operations and eliminate the need for a mechanical connection between the cockpit and these components.
		Active Headlights further aid visibility by adjusting the angle of its beams to match the speed and direction in which the vehicle is traveling.
		In addition, alerts from the IDS system, notification of incoming phone calls and e-mails, as well as other basic driving status information are also displayed on this meter.
	www.seriouswheels.com /top-2002-Acura-DN-X-Concept-Car.htm (858 words)

	Powered By Honda
		A reaction force equivalent to the increased amount of torque is directed to the inner wheel as a braking force, thus reducing torque to the inner wheel, and varying the lateral distribution of driving torque.
		The mechanical component of the AYC system is the torque-transfer differential located at the rear between the wheels incorporated with the final drive/differential unit, and is driven by the propeller shaft from the front-mounted transverse power plant.
		Power and torque values for the SOHC, 16-valve unit are 101 kW (JIS net) and 192 N m at 4500 rpm on a 8.8:1 compression ratio, and the dual overhead camshaft version produces 119 kW at 6000 rpm and 201 N m at 5200 on a 9.2:1 CR.
	www.g-speed.com /pbh/ae-honda-tech.html (7858 words)

	Review for Honda Prelude 2000
		You have to drive the car quite briskly to experience the benefits of the system, which is transparent during normal driving conditions.
		This system moves front-drive performance cars another step closer to parity with their rear-drive competitors in terms of absolute handling.
		Transferring as much as 80 percent of the power into the outside front wheel, which typically bears the heaviest load in hard cornering, compensates for the extra load and restores balance.
	cars.forsalebyowner.com /review.php?iReviewID=2768 (1194 words)

	F1 News > What is this torque transfer business? - Grandprix.com
		The FIA technical delegate Jo Bauer examined the system and concluded that it was not in compliance with Article 11.1.3 of the 2004 FIA Formula 1 Technical Regulations and referred the question to the stewards of the meeting: Paul Gutjahr, Mumtaz Tahincioglu and Waltraud Wunsch.
		The stewards ruled that the BAR system was not acceptable but BAR has now appealed that decision in order to get a clearer picture of why the system is not allowed because there are implications in other systems in other areas of the car.
		It is perhaps worth noting that for several years the Honda Prelude SH model has been fitted as standard with a system called the Active Torque Transfer System on which it seems the BAR system is based.
	www.grandprix.com /ns/ns13321.html (633 words)

	1999 Honda Prelude Type SH - The Car Connection (Site not responding. Last check: 2007-11-03)
		In 1988, for instance, Honda's four-wheel steering system debuted on a Prelude, and in 1993 a Prelude became the first Honda to receive the wizardry of sophisticated VTEC valve timing for its aluminum engine.
		Showing off with the SH This year, Prelude Type SH shows off Honda's active torque transfer system, which affects the controlled cornering characteristics of a rear-wheel-drive vehicle on one that applies power to the front wheels.
		A car with a front-wheel-drive power delivery system may provide a traction advantage over rear-wheel drive on slick or wet pavement, but it can also fall prey to understeer - the tendency for a front-driver to push off its intended line nose-first.
	www.thecarconnection.com /index.asp?n=157,184&sid=184&article=867&pf=1 (886 words)

	12/96 m.e. marketplace: news and notes
		The Active Torque Transfer System (ATTS), to be introduced on the 1997 Prelude Type SH, generates additional cornering force by actively changing the driving force transmitted to the left and right front wheels.
		The ATTS uses a feed-forward control system that decides the required degree of cornering assistance based on the driver's input and the output of various sensors that monitor lateral acceleration, steering angle, vehicle speed, and yaw rate.
		The photovoltaic system avoids some of the problems inherent in traditional solar water-heating systems that absorb sunlight with a metallic plate to heat a fluid flowing under or through the plate.
	www.memagazine.org /backissues/december96/marketplace/newsnote/news_note.html (2360 words)

	Honda Prelude History (Site not responding. Last check: 2007-11-03)
		The third generation Prelude was built upon the success of the second generation, however it gained 4 wheel steering (on some models), as well as a 2.0 L SOHC carburetor engine, a B20A DOHC EFI engine, or a slightly-larger B21A1 with the second series in 1990 and 1991.
		It is the only 4WS system on a production car that is entirely mechanical in its design; That is, there is always a direct mechanical connection between the steering wheel and the rear wheels.
		This system allowed Honda to overcome the front-wheel drive limitation somewhat, and in 1997 Car and Driver named the Prelude Type-SH the "best-handling car under $30,000." The close of the history of the Honda Prelude and its discontinuation will be welcomed by the newer engine, the K-series..
	www.honda-prelude.biz /history (1125 words)

	1997-2001 Honda Prelude Full Review (Site not responding. Last check: 2007-11-03)
		The gear selector lever could be left in Drive for regular automatic shifting, or tipped forward or backward to permit manual gear selection.The SH model went on sale first, equipped with a new Honda-developed system designed to combat the tendency of front-drive cars to plow, or understeer, when accelerating through a turn.
		Called the Active Torque Transfer System, it automatically distributed more of the engine's power to outside front wheels when accelerating in a turn.
		The system could direct up to 80 percent of engine torque to a single wheel.
	auto.consumerguide.com /Auto/Used/reviews/full/index.cfm/id/2265/act/usedcarreviewshowall?print=yes (1327 words)

	1999 Honda Prelude (Site not responding. Last check: 2007-11-03)
		In 1988, for instance, Honda's 4-wheel steering system debuted on a Prelude, and in 1993 a Prelude became the first Honda to receive the wizardry of sophisticated VTEC valve timing for its aluminum engine.
		This year, Prelude Type SH shows off Honda's active torque transfer system, which effects the controlled cornering characteristics of a rear-wheel-drive vehicle on one that applies power to the front wheels.
		A car with front-wheel-drive power delivery system may provide a traction advantage over rear-wheel-drive on slick or wet pavement because the front steering wheels can pull the vehicle through a curve rather than push it, exerting engine torque directly to wheels that steer for more precise traction control through the turn.
	www.cartrackers.com /am/showarticle.php?id=6487 (857 words)

	Automotive Engineering International Online
		Shibahata and his team have produced an advanced yaw control technology, the Active Torque Transfer System (ATTS), which was adopted in the top model in the recently updated Honda Prelude coupe range.
		Honda's system is based on the concept of stabilization through control of the front wheels (in a front-wheel-drive car) without reducing the pleasure of driving.
		The system applies an appropriate individual brake, and modulates the engine's torque output as required by the situation.
	www.sae.org /automag/toptech/1298t07.htm (1284 words)

	Supercars.net - 1997 Honda Prelude, Coreys
		Prelude has been Honda's experimental car, the vehicle to test the merits of such systems as anti-lock brakes, double-wishbone suspension, variable valve timing and four-wheel steering before passing the technology on to other members of the family or scrapping it (four-wheel steering) and trying again.
		ATTS is one of those sophisticated systems that few will understand and perhaps even fewer will get to appreciate because it is offered only in the uplevel SH (super handling) version with 5-speed manual.
		Because ATTS is one of those systems that performs without you having to push a button or turn a dial, you'll enjoy it without realizing you've got it.
	www.supercars.net /garages/PenneyWise/40v2.html (1250 words)

	Cartrackers.com (Site not responding. Last check: 2007-11-03)
		Honda calls it the Active Torque Transfer System (ATTS), and it takes front-drive performance cars another step closer to parity with their rear-drive competitors in terms of absolute handling.
		That--plus the pronounced forward weight bias that goes with having all the powertrain stuff up front--is why front-drive cars like the Prelude are more prone to understeer than their rear-drive counterparts.
		ATTS addresses this trait through a clever set of mechanical functions that automatically transfers engine torque to the outside front wheel, while increasing its rotational speed.
	www.cartrackers.com /Buyers_Guide/Reviews/Used_Cars/PID.89.517372899.2.html (555 words)

	Prelude
		The engine is equipped with Honda's VTEC system, a setup that varies the timing of the ignition so that the optimum performance is delivered regardless of the engine speed.
		The system would be available in limited numbers on a special variant, the Prelude VT'-R ATTS.
		ATTS transfers the drive force to the outside wheel in cornering to neutralise handling.
	www.basuweb.com /home/prelude_news.htm (2877 words)

	Prelude
		An optional active torque transfer system in Honda's Prelude gives itself to the cornering aspects to the car.
		Perfect for curvy back roads, this system is available only on the Prelude SH.
		Both Prelude and Prelude SH are powered by a 2.2-liter/195-horsepower inline four engine that will launch you to 60 mph in a amazing 7.0 seconds when paired with the manual five-speed transmission.
	members.tripod.com /broddy1/id30.htm (77 words)

	Honda Prelude S Type, specs, features and information
		It is equipped with ATTS or Active Torque Transfer System.
		The Prelude S Type is a 2-door, front wheel drive car that measures at about 101.77 inches for its wheelbase, 60.03 inches and 59.64 inches for its track front and rear respectively, 177.95 inches for its length, 68.89 inches for its width, and 5.51 for it ground clearance.
		With its smooth torque curve, lower intake resistance, higher compression, and secondary balancers on the engine, together with an anti-lock braking system or ABS, this car was able to make it as one of Honda's masterpieces.
	www.sportycoupe.com /HondaPreludeStype.html (210 words)

	Automotive Addicts - Readers Rides - 1998 Honda Prelude SH
		With the introduction of the Active Torque Transfer System (ATTS) in the SH model it had an edge over the competition in the handling field.
		The ATTS acts as an electronically controlled Limited Slip Differential system would if there was such a thing.
		of torque, this was not bad from a 4cyl.
	www.automotiveaddicts.com /prelude98.html (512 words)

	Find new car reviews and more at CarBuzzard.com (Site not responding. Last check: 2007-11-03)
		At the max, up to 80 percent of drive torque is transmitted through the planetary gearbox to the outside wheel, spinning the outside wheel up to 15 percent faster than the inside wheel.
		A dual-stage intake system restricts intake to a single tract at low and middle rpm ranges, single providing intake velocity for better cylinder filling and combustion chamber turbulence, but at 4800 rpm a valve flips open to a second intake tract for increased volume.
		The standard 120-watt stereo system has a microphone in one of the rear speakers that “samples” sound in the cabin, and alters the electronic signal to correct it.
	www.carbuzzard.com /review.php?id=12642 (1774 words)

	auto-asia.com (Site not responding. Last check: 2007-11-03)
		The former generates 103ps at 5,500rpm and 24kg-m of torque at 2,000rpm.
		An interesting electronic 'Active Torque Transfer' system enables the vehicle to shift on the fly betwen 2wd rear-wheel-drive to counter oversteer, 2wd front-wheel-drive to counter understeer, part-time 4x4 to handle tight cornering under braking, or full-time 4x4 to tackle slippery surfaces on or off-road.
		A fairly sophisticated anti-noise system, flexible seating, four-way projection headlamp, sliding roof carrier, reverse warning system and side undermirrors are among other features.
	www.auto-asia.com /print.asp?news=2852 (335 words)

	HONDA PRELUDE
		Even though the sound of this engine as it approaches the 7,000 rpm power peak under full throttle is one of the most hair-raising you will hear this side of a race track, it is a bit more quiet and smooth than the last model.
		Unlike a traction control system that will limit power to a spinning wheel, the ATTS system will take the same computer-generated measurements of driver inputs and vehicle status data and increase power to the wheel with the most traction in theory - the outside front one.
		It's a complicated system, mechanically, with clutches, gears and solenoids, but to simplify a description of it, its performance can be likened to the way a tracked vehicle like a bulldozer turns.
	www.infostuff.com /carstuff/frechette/honda_prelude.html (1024 words)

	[No title] (Site not responding. Last check: 2007-11-03)
		In 1997, Honda continued this tradition by equipping the Prelude SH with the Active Torque Transfer System (ATTS).
		The system works by monitoring the car's speed, steering angle and yaw rate to determine whether the car is following the driver's intended course.
		Also standard is a state-of-the-art anti-theft system that uses a digitally coded radio signal to ensure that the key you use is the one that came with the vehicle.
	www.cs.wisc.edu /niagara/data/edmunds/2001_Honda_Prelude_Type_SH.xml (576 words)

	Honda - The Car Connection (Site not responding. Last check: 2007-11-03)
		The CR-V's Real Time four-wheel-drive system doesn't need to be turned on and off -- it senses wheel slip and engages the rear wheels when needed.
		Prelude models have a wealth of power accessories as standard, and they are quite comfortable, except their interiors are a bit on the cramped side.
		The sporty Prelude SH model adds a high-technology Active Torque Transfer System (ATTS), which aids handling at the limit of adhesion, a rear spoiler, a subtle appearance package, and stiffer suspension tuning.
	www.thecarconnection.com /index.asp?article=2284&pf=1 (799 words)

	Honda Acura Forum - Tech Performance Forums : Civic, Integra, Accord - What is ATTS?
		the system sends more torque to the outer wheel in a turn thus makin it spin faster than the inside wheel.
		The system allows you to apply power early when turning because it eliminates understeer.
		Tather hen having the inside wheel spinuselessly in a corner, the ATTS would- through a series of electro magnetic clutched and other computerized gadgetry-shit the torque to the outide wheel where there was more traction.
	www.superhonda.com /forum/showthread.php?t=85156 (782 words)

	automobiles.honda.com: The American Honda Motor Company Site
		The system is exclusive to Prelude in its class.
		An Immobilizer security system with a special key incorporating a digital security code greatly reduces the likelihood of the Prelude being driven away by a thief.
		An innovative, Honda-developed handling system called Active Torque Transfer System (ATIS) is standard on the Prelude Type SH.
	automobiles.honda.com /info/news/article.asp?ArticleID=20010221001317 (394 words)

	View topic - Active Torque Dynamics; Not Your Average LSD
		Using the Ford Focus RS to showcase its technology, Prodrive has replaced the standard limited-slip diff with an active differential that locks when traction is required, but can allow the wheels to turn at different speeds to balance speed and grip.
		ATD changes the torque running to individual wheels based on information from sensors monitoring the car’s behaviour.
		Although Prodrive won’t offer ATD as an aftermarket item, it says several manufacturers are close to a decision on whether to fit the system as standard, where it would cost around £300 per unit.
	forum.mazda6tech.com /about2855.html (351 words)

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