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Automotive Engineering: November/December 2019

  • Magazine Article
  • 19AUTP11_17
Published 2019-11-01 by SAE International in United States

Valeo is an industry leader in technologies essential to vehicle electrification and connected/automated driving. The French Tier 1 pioneered 48V mild-hybrid systems and is a major producer of e-hardware and software including belt-starter generators, power electronics, electric superchargers and traction motors. Valeo recently entered a collaboration with Dana Inc. to develop and supply electrified AWD systems featuring 48-V hybrid power. The first of these is scheduled to launch in volume in early 2020 with a major European OEM.

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GKN spreads premium propshaft tech to quiet pickup cabins

Automotive Engineering: October 2019

Stuart Birch
  • Magazine Article
  • 19AUTP10_11
Published 2019-10-01 by SAE International in United States

It may seem a long way in engineering and NVH terms from premium European cars such as Audi's A5 and A7 to light duty trucks, but GKN Automotive has bridged that gap with its latest lightweight all-wheel drive (AWD) modular propshaft. Many pickups suffer a significant amount of unwanted NVH emanating from the front propshaft, with its two universal or CV joints and an interconnecting shaft positioned below and close to the passenger cabin. But now GKN Automotive has “re-characterized” its premium car driveline system to an entirely different vehicle category.

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WHAT WE'RE DRIVING

Automotive Engineering: September 2019

  • Magazine Article
  • 19AUTP09_08
Published 2019-09-01 by SAE International in United States

As the sporting player in Volvo's C-segment sedan lineup, this all-wheel drive, turbocharged-and-supercharged R-Design S60 faces benchmark competition in the BMW 3-Series, Audi A4 and Mercedes-Benz C-Class. In pure performance, the stylish Swede stacks up nicely against the Germans: Its 316 hp (236 kW) pushes the 3,900 lb (1769 kg) car plus my 200-lb (91 kg) of dead weight from a standstill to 60 mph (97 km/h) in 5.5 s, according to my stopwatch. Dynamically, the S60 T6 (not my choice of nomenclature, as it's a 4-cyl., not a six) feels solid and secure, if not exceptionally nimble, when pushed hard in the corners.

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Definition and Measurement of Transfer Case Speed-Dependent Parasitic Loss

Drivetrain Standards Committee
  • Ground Vehicle Standard
  • J2985_201907
  • Current
Published 2019-07-17 by SAE International in United States
This SAE Recommended Practice covers transfer cases used in passenger car and light truck applications. Transfer cases are of the chain, geared, manually and electronically shifted types although other configurations are possible. The operating points (speeds, temperatures, etc.) were chosen to mirror those of the United States Environmental Protection Agency Vehicle Chassis Dynamometer Driving Schedules (DDS).
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Modeling and Optimal Design of All-Wheel-Drive Hybrid Light Trucks

SAE International Journal of Alternative Powertrains

Ford Motor Company, USA-Xiaowu Zhang
Robert Bosch LLC, USA-Nikhil Ravi
  • Journal Article
  • 08-08-01-0003
Published 2019-06-06 by SAE International in United States
Fuel economy and performance are both important in the design of hybrid pickup trucks. All-wheel drive is essential to ensure superior performance compared to two-wheel-drive designs. In this article, as a comprehensive extension work to the article published in ASME Dynamic Systems and Control Conference [1] on all-wheel-drive (AWD) hybrid truck, we investigate the modeling, design, and control problem of AWD hybrid vehicles and develop a methodology to identify optimal designs. This methodology 1) formulates an automated modeling process, 2) searches exhaustively through all possible AWD designs, and 3) employs a near-optimal energy management strategy, to obtain a family of designs with superior performance and fuel economy. A design case study for a hybrid Ford F-150 is conducted, to showcase this design process.
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2020 Escape: Ford's first crossover on new global FWD architecture

Automotive Engineering: June 2019

Paul Seredynski
  • Magazine Article
  • 19AUTP06_15
Published 2019-06-01 by SAE International in United States

Ford recently unveiled the all-new 2020 Escape, its first SUV based on the company's new FWD global architecture, leveraging the new unibody toolkit to create a compact “urban” SUV for the voracious compact-crossover segment. A second 5-seat, 2-row SUV based on the same architecture-but with a more “rugged, off-road focus”-was announced at the Escape unveiling, though it does not yet have a name or official release date-and will be in addition to the upcoming Bronco.

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As automotive climates shift, GKN ramps up its winter testing

Automotive Engineering: June 2019

Paul Seredynski
  • Magazine Article
  • 19AUTP06_13
Published 2019-06-01 by SAE International in United States

As the influx of electrification continues to roil the industry, seamlessly integrating the hardware and wealth of software it brings with it creates a far broader engineering challenge. Tier-1 companies that traditionally supplied “parts” are rapidly transitioning from a component-level mindset to system-level projects that include exponential investments in programming and control algorithms. Meshing innovative electrified propulsion systems while still meeting diverse and performance-hungry OEM integration criteria is making winter testing more crucial than ever.

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Mazda finally ready with Skyactiv-D for U.S.

Automotive Engineering: June 2019

Paul Seredynski
  • Magazine Article
  • 19AUTP06_14
Published 2019-06-01 by SAE International in United States

Mazda announced the long-awaited arrival of its Skyactiv-D diesel engine to the U.S. at April's New York International Auto Show. The 2.2L twin-sequential turbocharged 4-cylinder diesel is available for pre-order now in the highest AWD trim of Mazda's best-selling vehicle, the 2-row, 5-seat Mazda CX-5 SUV. The 2019 model with the diesel engine has a starting MSRP of $41,000-a $4K premium over the equivalent gasoline trim-with deliveries expected to begin this summer.

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Distributed Drive Electric Vehicle Longitudinal Velocity Estimation with Adaptive Kalman Filter: Theory and Experiment

China Automotive Engineering Research Institute Co., Ltd.-Yaming Zhang
Tongji University-Bo Leng, Lu Xiong, Zhuoping Yu, Dequan Zeng
Published 2019-04-02 by SAE International in United States
Velocity is one of the most important inputs of active safety systems such as ABS, TCS, ESC, ACC, AEB et al. In a distributed drive electric vehicle equipped with four in-wheel motors, velocity is hard to obtain due to all-wheel drive, especially in wheel slipping conditions. This paper focus on longitudinal velocity estimation of the distributed drive electric vehicle. Firstly, a basic longitudinal velocity estimation method is built based on a typical Kalman filter, where four wheel speeds obtained by wheel speed sensors constitute an observation variable and the longitudinal acceleration measured by an inertia moment unit is chosen as input variable. In simulations, the typical Kalman filter show good results when no wheel slips; when one or more wheels slip, the typical Kalman filter with constant covariance matrices does not work well. Therefore, a gain matrix adjusting Kalman filter which can detect the wheel slip and cope with that is proposed. Simulations are carried out in different conditions, including no wheel slips, one wheel slips, all wheel slip, passing a bump, and variable acceleration…
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Development of Innovative Dynamic Torque Vectoring AWD System

Toyota Motor Corp.-Ryota Horie, Ryohei Yuasa
Published 2019-04-02 by SAE International in United States
This paper describes the development of an innovative AWD system called Dynamic Torque Vectoring AWD for all-wheel drive (AWD) vehicles based on a front-wheel drive configuration. The Dynamic Torque Vectoring AWD system helps to achieve high levels of both dynamic performance and fuel efficiency. Significant fuel economy savings are achieved by using a new compact disconnection mechanism at the transfer and rear units, which prevents any unnecessary rotation of the propeller shaft. In addition, the system is also capable of independently distributing torque to the rear wheels by utilizing electronically controlled couplings on the left and right sides of the rear differential. This greatly enhances both on-road cornering performance and off-road driving performance.
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