Prodrive tries to solve torquesteer issue with FWD vehicles
#1
Prodrive tries to solve torquesteer issue with FWD vehicles
Rally firm takes on torquesteer - - SOurce: Autocar
Engineering consultancy company Prodrive has created a system which combats the aggressive torquesteer suffered by powerful front-wheel-drive cars. The Banbury-based firm’s Automotive Technology division has developed a new front-wheel-drive version of its Active Torque Dynamics (ATD) stability system.
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. On four-wheel-drive cars it senses under- or oversteer and alters the drive to correct this.
Prodrive, which runs Subaru’s world rally team, has been working on ATD for around five years, and has demonstrated its capabilities to around half a dozen manufacturers in cars ranging from off-roaders to rear-wheel-drive sports cars. However, its application in a front-wheel drive layout is new.
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.
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. On four-wheel-drive cars it senses under- or oversteer and alters the drive to correct this.
Prodrive, which runs Subaru’s world rally team, has been working on ATD for around five years, and has demonstrated its capabilities to around half a dozen manufacturers in cars ranging from off-roaders to rear-wheel-drive sports cars. However, its application in a front-wheel drive layout is new.
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.
#4
But still, when the front tires are doing all the acceleration and steering at the same time, they will use up all the available tire traction very fast. However, for RWD cars, all the front tires' traction will be used in steering, and the rear tires' traction purely on acceleration. RWD cars can still accelerate out of turns faster.
#5
True Ed. Obviously this is another patch on the inherent torquesteer issue with the FWD setup. In all fairness though, FWD has come a long way with this issue. You can put up to 240 lb-ft of torque on the front wheels without huge issues currently.
#7
Originally Posted by gocubsgo55
Dont a lot of Honda FWD cars (Type-R mostly) already have LSDs? Or does that not do the trick?
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