Schaeffler displays key emission reduction and fuel efficiency technologies at SIAT Expo

by Amit Panday 16 Jan 2019


UniAir is the world’s first fully-variable electrohydraulic valve control system.

Schaeffler, which pitches itself as a ’systems partner to the automotive industry‘, is making a strong presentation of its products and technologies at SIAT 2019 (at SIAT Expo, Stall No. 92) which opened today in Pune.

Some of the key future technologies and products that Schaeffler is showcasing for emission reduction and fuel efficiency technology in India (at Stall 92) are:

P2 hybrid module: In P2 hybridisation, a powerful electric motor is installed (coaxially or even axially parallel) between the combustion engine and the transmission. In addition, an automated C0 disconnect clutch is needed so that the electric motor can also be used independently of the combustion engine for pure electric driving. the particular advantage of combining a double clutch transmission with a P2 hybrid system rather than a P2.5 hybrid system with fixed coupling of the electric motor and a sub-transmission is that the gear ratio function of the double clutch transmission can be used in all operating modes (purely electric driving, hybrid mode, and battery charging). This results in a high level of overall energy efficiency. It is also possible to drive in any situation without interrupting the tractive force, making for extremely comfortable driving.

UniAir: Schaeffler introduced the UniAir technology as a production-ready solution back in 2009. The same year saw its first application in the Fire MultiAir engine from Fiat. Schaeffler supplies the UniAir as a modular system comprising: 
- Electrohydraulic actuator elements
- Control unit software module for engine management
- Application-specific calibration data set

Schaeffler says it set new standards with the start of volume production of UniAir – the world’s first fully-variable electrohydraulic valve control system. The latest generation of the UniAir system not only makes it possible to reduce charge cycle losses, but also optimize combustion and achieve transient torque control via the air path.

Dual clutch transmission: Over the past few years, double clutch transmissions have become established as an integral part of the automatic transmission sector. They meet this sector’s high requirements for driving pleasure, comfort and efficiency. Double clutch transmissions also offer great potential for further reducing CO₂ levels as part of electrification. With important transmission components such as wet and dry double clutches and a wide range of actuators, Schaeffler says it has maintained its leadership position on the market in the past few years, producing more than four million double clutches per year worldwide. Schaeffler covers all vehicle segments, from compact cars to super sports cars and SUVs and develops customized solutions with the aim of improving efficiency and comfort in the power train even further.

Mild Hybrid P0 System: If a belt starter generator (BSG) is used in a classic auxiliary drive, this is referred to as a ’PO mild hybrid‘. While the focus was originally on 12-volt belt start-stop systems in the auxiliary drive, it has now shifted to PO mild hybrid systems with a 48-volt or high-voltage belt starter generator, which can be used to fulfill stricter CO₂ regulations.  

The central argument in favor of PO mild hybrids is their high functional scope combined with comparatively minimal integration time and effort, and low costs. This topology makes it possible to use more powerful electrical consumers, along with fast and comfortable combustion engine restart via the belt drive, and it is also capable of recuperating braking energy and feeding it back to the drive as needed, called ’boosting ’.

Electric axle drive P4 System: A significant feature of the Schaeffler electric axle is the integration of a differential with a planetary design as an alternative to the bevel gear differential. In terms of its functionality, there are no differences in comparison to the classic bevel gear differential.  It provides uniform distribution of torque to the wheels and compensates differences in rotational speed during cornering. In terms of installation space requirements, the Schaeffler lightweight differential offers significant benefits compared to the classic bevel gear differential which is characterized by a compact radial design due to the lack of a drive wheel but requires significantly more space in the axial direction than the lightweight differential with the same torque capacity.