JSAE Automotive Engineering Exposition 2014: OEM driver assistance systems

Nissan Smart Rearview Mirror, Subaru EyeSight, and commercial vehicle powertrain technologies



JSAE Automotive Engineering Exposition 2014  This is the second JSAE report that covers exhibits by Japanese OEMs at the 2014 Automotive Engineering Exposition held in Yokohama, Japan on May 21 to 23, 2014 (hosted by the Society of Automotive Engineers of Japan).   This report summarizes safety driving assistance technologies such as Nissan’s Smart Rearview Mirror and the new EyeSight (ver.3) from Fuji Heavy Industries (FHI: maker of Subaru automobiles). It also introduces latest mini and commercial vehicle technologies, ultra micro electric vehicles (EVs), and the Yamaha Tricity.


Related Reports:

JSAE Automotive Engineering Exposition 2014
  new OEM powertrain technologies
  latest EV/HV technologies

Nissan Smart Rearview Mirror and Subaru EyeSight (ver.3)


Nissan Smart Rearview Mirror                 Nissan Smart Rearview Mirror The LCD screen shows an image from the rearview camera

Nissan Smart Rearview Mirror                  Nissan Smart Rearview Mirror An actual view on the rearview mirror. With this view, it is apparently difficult to check the rearview of the vehicle as it is hindered by tall plants, rear seat head rests, and C-pillars. After switching to the LCD screen, the clear view is projected as shown in the left-side photo.

narrow-angle rearview camera Newly developed 1.3M-pixel narrow-angle rearview camera mounted on the top of the rear window (for the Smart Rearview Mirror)

Nissan Direct Adaptive Steering Nissan Direct Adaptive Steering


Nissan Smart Rearview Mirror The system allows the driver to switch between the rearview mirror and the liquid crystal display (LCD) screen depending on the driver's preference. The LCD screen projects images captured by the rearview camera which is mounted on the top of the rear window. The LCD and the mirror display modes are switchable by changing the elevation angle of the rearview mirror. As OEMs recently tend to downsize rear windows in order to improve aerodynamic characteristics of vehicle bodies, it is becoming more difficult to check r conditions behind a vehicle with a rearview mirror. The new switchable mirror was developed to provide a clear rearview for the driver.
One of the challenges before commercialization was to reduce glare on LCD screen, as Nissan uses a half mirror to transmit the rearview images on the LCD screen. This challenge has been addressed by optimizing the rearview mirror angle on LCD screen mode so that the mirror can project dark images with less glare.
The mirror is expected to be available as an option for the X-Trail and Elgrand in Japan in June 2014. For the availability in other countries, Nissan is currently under consideration.
Direct Adaptive Steering (steer-by-wire) The steer-by-wire is a function that transmits the movement of the steering to the steered wheels without the aid of the steering shaft. The new Skyline (Infiniti Q50) is the world's first production model equipped with this function (launched in U.S. in August 2013). The driver's steering movements are transmitted to the steering actuator by way of  an angle sensor and three electronic control units (ECUs). This system offers a better responsiveness than steering through the steering shaft. In addition, the system automatically adjusts steering deviation which occurs due to disturbances during driving, and can alleviate the driver’s fatigue.
One ECU drives a steering force actuator that detects the rotation of the steering and a sensor. The other two ECUs respectively drive two actuators that operate the steered wheels. The three ECUs also monitor each other's function. When the Direct Adaptive Steering function stops, the system engages clutches to allow normal steering via the steering shaft. Cost reduction for the system remains as a challenge.
Subaru EyeSight Ver.3 The third-generation advanced driving assistance system to be installed on the Levorg (to be launched in June 2014 in Japan). In addition to color recognition for the stereo camera system, the viewing angle has been increased from 25 degrees to 40 degrees. The system's visibility distance was also improved by approximately 40%. The condition for the Pre-Collision Braking Control was increased from a relative speed of 30km/h to 50km/h.
The color recognition of the camera enabled the system to detect the brake lights of a vehicle ahead, allowing earlier deceleration in cruise control mode. The system can also detect signals. Therefore, the new EyeSight can warn a driver by detecting a red signal ahead when the cruise control function is used inappropriately on a road (note). Other new assistance systems include steering control, lane keeping, and lane departure prevention functions.

(Note) FHI says that Adaptive Cruise Control is a driving support system intended for use on expressways, freeways and interstate highways. T


Subaru EyeSight Ver.3 stereo camera system FHI: Subaru EyeSight Ver.3 stereo camera system The lenses are located closer to the windshield than the previous type. This helps reduce the flontglass area that needs to be kept clean.



Mini vehicle technologies for Daihatsu Tanto and Suzuki Hustler


Daihatsu Tanto Daihatsu Tanto Daihatsu Tanto Daihatsu Tanto's resin back door
Daihatsu Tanto Daihatsu Tanto's resin hood Suzuki Hustler Suzuki Hustler


Daihatsu Tanto A fully-redesigned mini wagon with a high roof and spacious cabin that was launched in October 2013. A sliding rear door is used on the driver's seat side, while the cabin space has been widened, including a 2cm-higher front seat head clearance. The fuel efficiency has also been improved from 25.0km/liter to 28.0km/liter (both in JC08 mode) by using the Cooled i-EGR (exhaust gas recirculation) system. The Tanto has been the best selling model in Japan for two consecutive months in April and May 2014.
By using resin for exteriors including the back door, hood, and front fender, the vehicle is lighter by 10kg compared to when conventional steel parts are used. This also improves protective performance for pedestrians. In the previous model, only front and rear bumpers were made of resin.
Suzuki Hustler The first mini crossover launched in January 2014. In order to improve off-road driving performance, the AWD model is equipped with the hill descent control system that can keep a constant speed of 7km/h on a steep downward slope. It also features the grip control system that helps starting on slippery road surfaces like a snowy road.
While the monthly sales target is set at 5,000 units, Suzuki reportedly have increased its capacity to produce more than 10,000 units per month, in response to brisk orders.



Powertrain technologies from four commercial vehicle makers


6UZ1-TCH Isuzu's 10-liter engine: 6UZ1-TCH ELF CNG-MPI Isuzu CNG truck: ELF CNG-MPI
Urea-less system Hino: Urea-less system for simultaneous NOx and PM reduction Pro Shift 12 Hino's 12-speed AMT: Pro Shift 12


Isuzu 6UZ1-TCH An inline 6-cylinder diesel engine with a displacement of 9,839cc. The engine features super high-pressure common-rail and injector, cooled EGR, and electronically controlled no-step variable capacity turbo. An urea selective catalytic reduction (SCR) system has also been added as an aftertreatment system.
ELF CNG-MPI A compressed natural gas (CNG)-powered light-duty truck currently on sale. A 4.6-liter engine is featured with the maximum output of 96kw/3200rmp (net). The maximum payload is 3 tons.
Hino Urea-less system for simultaneous NOx and PM reduction A system developed for medium- and light-duty commercial vehicles to reduce NOx and particulate matters (PMs) simultaneously. For large commercial vehicles, diesel particulate filters (DPFs) and urea SCR systems have already been commercialized as exhaust gas aftertreatment devices. However, required urea infrastructures have yet to be sufficiently established. To solve this problem, Hino developed a system that reduces NOx by using diesel fuel for a reaction promoter and processes PMs simultaneously in the same catalyst. The system is compliant with the post new long-term regulation in Japan and has been on sale since 2010.
Pro Shift 12 A 12-speed automated manual transmission (AMT) for large vehicles. Easy driving is achieved with the Slow switch that facilitates very slow-speed traveling. The E-COAST switch increases the coasting distance. Recently, the demand for AMTs is increasing also in emerging countries, partly due to the increase of female drivers to address labor shortage.
Mitsubishi Fuso Canter Eco Hybrid Canna A light-duty hybrid truck launched by Mitsubishi Fuso in May 2012. An in-built motor is fitted within a 6-speed dual clutch transmission. The company exhibited the Canna concept model, whose interior and exterior were designed specifically for female truck drivers by an in-house project team.
6R10 An inline 6-cylinder 12,808cc diesel engine jointly developed with Daimler's truck division. The engine is fitted with a new boosting common rail system, the X-Pulse. It is mounted on the Super Great heavy-duty truck and the Aero Queen large-sized bus.
UD Trucks GH11TC A 10,836cc diesel engine. Adoption of a variable geometry turbocharger (VGT) helps achieve the output and torque equivalent to a 13,000cc engine.
ESCOT-V A 12-speed Automated Manual Transmission (AMT). Twelve speeds are provided by six speed gears and auxiliary gears (High/Low) for each.


Mitsubishi Fuso Canter Eco Hybrid Canna Mitsubishi Fuso Canter Eco Hybrid Canna Mitsubishi Fuso's 6R10 engine Mitsubishi Fuso's 6R10 engine
UD Trucks' GH11TC engine UD Trucks' GH11TC engine UD Trucks' 12-speed AMT UD Trucks' 12-speed AMT



Ultra micro EVs and Yamaha Tricity


Toyota i-ROAD Toyota Auto Body COMS
Toyota i-ROAD Ultra micro EV with two front wheels and one rear wheel. Demonstration tests have been conducted in Toyota city, Japan since March 2014. Toyota Auto Body COMS        Single-seater micro EV priced at JPY 821,000          (consumption tax included, for private use).
Nissan New Mobility Concept Honda MC-β
Nissan New Mobility Concept Tandem two-seater micro EV. The exterior design has been changed from the Renault Twizy on sale in Europe. Honda MC-β Tandem two-seater micro EV. Demonstration tests have been carried out mainly in Saitama city, Japan.


Yamaha trike: Tricity

A trike launched in Thailand in April 2014 (made in Thailand). The local price is THB 79,500. The launch in Japan is planned within 2014, with the expected price at JPY 400,000 or lower. The release in Europe is also planned in 2014. The current model carries a 125cc single-cylinder engine, but a larger engine may be featured.
Yamaha Tricity three-wheeler Yamaha trike: Tricity  (front view) Yamaha Tricity three-wheeler Yamaha trike: Tricity (side view)


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