Supplier Spotlight

Video Exclusives

Ferrari 812 Superfast powertrain

gtr

Ferrari details its IEOTYA 'Above 4-liter' category winning engine, as fitted to its latest model, the 812 Superfast


Jaguar E-Pace extreme testing

gtr

As Jaguar continues to ready the E-Pace ahead of its global market debut, the development team gives some insight in to the comprehensive program


Click here/on image to watch video

In light of Volvo's ambiguous announcement that all of its car will 'go electric' by 2019; do you consider 48V systems to be a necessary segue between current-generation ICE and a full EVs?

Web Exclusives

« back to listing

Schaeffler begins electromechanical camshaft phasing unit production

German supplier Schaeffler has revealed that it is about to begin volume production of its electromechanical camshaft phasing units to be installed in a Japanese engine.

 

German supplier Schaeffler has revealed that it is about to begin volume production of its electromechanical camshaft phasing units to be installed in a Japanese engine.

The company says using this type of unit instead of the current standard hydraulic systems allow the camshaft to adjust more quickly and accurately to the prevailing engine operating conditions, reducing consumption and harmful emissions while simultaneously increasing comfort during stop/start operation.

Schaeffler says the electromechanics make it possible to phase the camshaft at speeds up to 600 crank angle degrees per second, and that the hydraulic systems operate from two to 10 times more slowly, irrespective of the engine speed and temperature.

The increased dynamics of electromechanical phasing units allow very fast reactions to changes in load, even at low engine speeds, such as when the driver suddenly kicks down on the gas pedal while the engine is overrunning.

Unlike hydraulic systems, the reaction speed to a change in load is not dependent on the oil supply. In some cases, it is no longer necessary to have a larger engine oil pump which has a subsequent benefit in terms of improvements to fuel consumption.

The company also says that stopping and starting the engine is much smoother with electromechanical camshaft phasing units, because it is possible to start the ICE without any noticeable judder. This is because, up to 200rpm, the engine runs with reduced compression as the camshaft can be positioned as required before the engine starts.

During acceleration, valve control times are synchronized with the injection so that there is a soft onset of compression; when compression and ignition are correctly adjusted, the result is smooth engine startup.

The electric motor used also contributes to the phasing accuracy as it serves not only as an actuator but also as a sensor. In addition to the position recognition already in use with hydraulic systems, usually four times per camshaft rotation, in the electrical system, the rotor position is checked continuously by integral sensors and assessed by an electronic control system.

The precise position of the camshaft is therefore always known. Schaeffler has developed the DC motor in-house.

“Overall, we can see a clear trend to highly versatile valve trains,” said Martin Scheidt, senior vice president of R&D engine systems at Schaeffler. “The strict CO₂ regulations mean that more and more automotive manufacturers are using cylinder deactivation systems.”

October 14, 2015

 

14 October 2015

Read Latest Issue

International Engine of the Year Awards
Read Latest Issue
Read Latest Issue

Web Exclusive Articles

Engines on test: Honda 3.5-liter bi-turbo V6
The long-awaited replacement for Honda's NSX supercar has finally arrived. Engine Technology International samples the 2017 supercar's electrically-assisted 3.5-liter bi-turbo V6 in an unusual setting
Read Now

Engines on test: Jaguar Land-Rover AJ126 3.0-liter V6
A sports car engine in an SUV? Does JLR's AJ126 supercharged 3.0-liter V6 help the Range Rover Sport live up to its nameplate? 
Read Now

Audi A8 range 48V system: The Knowledge
Audi's next-generation A8 will feature a 'range-wide' adoption of 48V circuitry, for the very first time. Engine Technology International details the new electrical subsystem
Read Now


Supplier Spotlight

Supplier SpotlightClick here for listings and information on leading suppliers covering all aspects of the engine technology industry. Want to see your company included? Contact aboobaker.tayub@ukimediaevents.com for more details.

فروشگاه اینترنتی فروشگاه اینترنتی سیستم همکاری در فروش کانال تلگرام چت روم ماهواره آنلاین اندروید دانلود فیلم فروشگظ;ه اینترنتی

Submit your industry opinion

Industry BlogDo you have an opinion you'd like to share with the engine technology community? We'd like to hear your views and opinions on the leading issues shaping the industry. Share your comments by sending up to 500 words to d.slavnich@ukimediaevents.com

Submit Your Recruitment Ad

Recruitment AdTo send us your recruitment advertising or to receive information on placing a banner please email aboobaker.tayub@ukimediaevents.com