FEV shows compact DCT for FWD vehicles

  • 05-Mar-2015 03:22 EST
xDCT.jpg

Current production dual-clutch transmissions (DCTs) are limited by their inherent mechanical complexity, according to FEV engineers. In addition, most conventional DCTs are characterized by drivers as having sluggish launch feel. The company has developed a new generation of DCTs, called the xDCT family, that are said to offer reduced transmission mass, lower complexity/cost, and improved fuel consumption, while also improving vehicle launch characteristics. The 7-xDCT has seven forward gears and a 250 N·m (184 lb·ft) input torque capacity, and the 10-xDCT has ten forward gears and an input-torque capacity of 400 N·m (295 lb·ft). Specific benefits are improved mechanical efficiency, reduced parasitic drag, an increased ratio spread, and inherent hybridization potential. Shift quality is enhanced, the company claims, by using smaller gear steps and full powershift capabilities. The technology will be on display at the upcoming SAE 2015 World Congress. Innovative features include “gear generation” and “supported shifts.” To generate gears, a switchable connection between the two input shafts is installed that allows use of all gears inside the transmission with both clutches. Supported shifts, during which torque fill-in for an automated manual (AMT)-style gear shift, is provided by the next higher gear. The combination of these two concepts allows for effective use of all theoretically available gears.

Author:
Sector:
Mentions:
Share
HTML for Linking to Page
Page URL
Grade
Rate It
4.50 Avg. Rating

Read More Articles On

2016-08-03
Porsche broke the engineering "golden rule" in developing its latest powertrain family but the resulting engines and gearbox are better than their predecessors in every metric.
2016-07-15
Validation testing of the new 2-step VCR by several OEMs has been successful to date and is expanding, as the industry examines more sophisticated solutions to meet CO2 regulations.
2016-07-17
The material—hot deformed neodymium—is being used first in a new permanent-magnet traction motor powering Honda’s 2017 Freed Sport Hybrid compact minivan. Significantly, the material is not a “heavy” rare-earth metal, one that requires “doping” with dysprosium or terium rare earths to achieve high heat-resistance characteristics.
2016-08-04
What does it cost to replace an EV battery at the retail level? For a BMW i3 a new battery will set owners back about $16,000, according to Dr. Christian Cozzarini, BMW Department Head, Environmental Engineering, who spoke at the 2016 CAR Management Briefing Seminars.

Related Items

Standard
2015-08-10
Training / Education
2010-03-15
Training / Education
2011-04-12