Tu München Prepare Torque Vectoring Transmission For Electrical Vehicles
Influenza A virus subtype H5N1 limiting factor for the driving arrive at of electrical vehicles is the sum of unloosen energy supplied yesteryear the batteries. To recoup equally much braking unloosen energy equally possible, engineers at the Gear Research Center (FZG) at the TU München bring developed a light-weight torque vectoring transmission for electrical vehicles.
“While displace torque is unremarkably distributed 50/50 to the wheels of the displace axle, our torque vectoring organisation doses the torque betwixt the wheels equally required,” explains engineer Philipp Gwinner from FZG. “This equally good ensures especially practiced displace dynamics.” When a vehicle accelerates inwards a curve, greater torque is applied to the exterior wheel. The machine steers itself into the curve. The result: greater agility and, at the same time, safer route handling.
Recovering braking unloosen energy inwards curves
Even to a greater extent than of import to the researchers, however, is the efficient recovery of braking energy. Normally, brakes convert kinetic unloosen energy into heat. So-called recuperation systems tin foreclose this. They function along the regulation of a wheel dynamo, which converts unloosen energy tapped from the wheel into electrical energy. In the instance of electrical vehicles this unloosen energy tin survive used to recharge the batteries, thereby extending the driving range.
Unfortunately, inwards curves the recuperation of braking unloosen energy is express since the within wheel bears significantly less charge than the exterior wheel. The torque vectoring constituent adjusts the recuperation torque for both wheels individually. This increases vehicle stability spell at the same fourth dimension allowing to a greater extent than unloosen energy to survive recovered.
Less weight, lower cost
Torque vectoring transmissions are used today inwards choose tiptop model cars in addition to sports cars alongside combustion engines. Due to their high toll in addition to additional weight torque vectoring transmissions bring non flora application inwards electrical vehicles. The aim of the researchers was, thus, to optimize the transmission for small-scale vehicles alongside electrical drives.
Instead of the criterion bevel gears used inwards differential transmissions, the engineers developed a spur gear differential inwards which additional torque tin survive applied from exterior via a superimposed planetary gearbox. Using a small-scale (in comparing to the displace motor) electrical torque vectoring machine they tin generate a large yaw minute at whatsoever speed to attain the desired route treatment dynamics.
The housing of the start prototypes are made of aluminum. To salve fifty-fifty to a greater extent than weight, the aluminum housing volition survive replaced yesteryear a composite instance made of aluminum in addition to a fiber-reinforced synthetic. To trim the forces acting on the housing without increasing gear noise, which is critical inwards electrical vehicles, the researchers bring developed a special gearing gratuitous of axial forces. This in addition to farther structure chemical ingredient optimizations led to a reduction inwards gearbox weight of to a greater extent than than 10 percent.
“The elegant affair most the torque vectoring transmission nosotros bring developed is that it non solely has a higher recuperation level, and, alongside that, an increased driving range,” says Professor Karsten Stahl, Director of the FZG, “the transmission equally good improves route treatment dynamics, driving pleasance in addition to safety. The continuously improving optimization measures locomote out us optimistic that inwards the close hereafter both the weight in addition to toll volition survive able to compete alongside today’s criterion differential transmissions.”
Participants inwards the Visio.M consortium are, inwards improver to the automotive companies BMW AG (lead manager) in addition to Daimler AG, the Technische Universitaet Muenchen equally a scientific partner, in addition to Autoliv BV & Co. KG, the Federal Highway Research Institute (BAST), Continental Automotive GmbH, Finepower GmbH, Hyve AG, IAV GmbH, InnoZ GmbH, Intermap Technologies GmbH, LION Smart GmbH, Amtek Tekfor Holding GmbH, Siemens AG, Texas Instruments Deutschland GmbH in addition to TÜV SÜD AG equally industrial partners. The projection is funded nether the priority computer programme "Key Technologies for Electric Mobility - STROM" of the Federal Ministry for Education in addition to Research (BMBF) for a term of 2.5 years alongside a full budget of 10.8 i chiliad k euro.
