MAHLE und India Pistons unterzeichnen Vereinbarung ... - Mahle.com

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MAHLE und India Pistons unterzeichnen Vereinbarung ... - Mahle.com

PRESSRELEASE

New at MAHLE: solid-metal, machined, and composite

commercial vehicle camshafts

Stuttgart, September 2008–MAHLE provides casted, composite,

and forged camshafts for passenger car engines, either as raw

parts or ready-to-assemble. For commercial vehicles, MAHLE is

already producing cast camshafts. The commercial vehicle

portfolio is now being expanded to include composite camshafts

and steel camshafts manufactured from solid metal.

The MAHLE composite camshaft allows, for one thing, a reduction

in weight of up to 50 percent; for another, it enables the integration

of additional functions such as camshaft oil separation or

counterbalance shafts. It consists of a precision steel tube onto

which the cams and parts are attached with a thermal shrink fit.

This transverse press fit provides high durability—as do the

carefully selected materials. For commercial vehicles, MAHLE

exclusively uses cam lobes made of inductively hardened ball

bearing steel 100Cr6, which allows contact stresses of about

2,000 MPa.

The selection of different materials for the composite camshaft

allows targeted applications. Components that are subject to lower

loads are made of less expensive materials. For example, the

trigger wheel is often a power metal or sheet metal part, the axial

bearing rings are made of low-alloy steel, and the drive wheel is a

forged part, while the cam lobes are made of high-alloy steel.

A further advantage of the composite camshaft from MAHLE is the

ability to integrate additional functions into the camshaft tube. For

example, the swirl generator of a blow-by separator, which

combines high separation rates with a reduced freezing hazard

and low space requirement. MAHLE has also already created an

integrated counterbalance shaft for a V6 engine for commercial

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vehicles. It is based on the patented MAHLE CamInCam ®

technology.

For a year now, MAHLE has also provided its customers with steel

camshafts manufactured from bar stock. These are used mainly in

commercial vehicle, stationary, and large engines. For commercial

vehicle engines, they are used primarily as a central camshaft with

tunnel bearings, which is still a low-cost solution for the highest

requirements for bending and torsional stiffness.

Large engines have similarly high requirements. In addition, a

service life of up to 60,000 operating hours must be guaranteed

there. For large engines, segmented camshafts are used. Each

segment contains the cam for at least one cylinder and is screwed

end-to-end to the adjacent elements. The product range currently

includes camshafts with an overall length of up to 2.15 m, and

diameters up to 35 cm.

MAHLE is thus a complete provider of camshafts for motorcycles,

passenger cars, commercial vehicles, and stationary engines, and

is the only supplier that covers the entire spectrum of camshafts

for all types of combustion engines.

The MAHLE Group is one of the 30 largest companies in the

automotive supply industry worldwide. As a leading manufacturer

of components and systems for the combustion engine and related

products, MAHLE ranks among the top 3 systems suppliers for

piston systems, cylinder components, valve train systems, air

management systems, and liquid management systems. MAHLE

employs around 48,000 people at 110 production plants and eight

research and development centers. In 2007, MAHLE achieved

sales of over EUR 5 billion (USD 7.5 billion).

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Further queries:

MAHLE GmbH

Birgit Albrecht

Corporate Communications/Public Relations

Pragstraße 26–46

D-70376 Stuttgart

Germany

Phone: +49 (0) 711/501-12506

Fax: +49 (0) 711/501-13700

birgit.albrecht@mahle.com

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