Skip to main content

Engineering Milestones

2015 - Pioneering Turbocharger Technology Launched
Official launch of the new Two-Stage turbocharger that powers the All New 2016 Nissan TITAN XD at the Mid-America Trucking Show (MATS). The next generation Two-Stage System with Rotary Turbine Control (RTC) is Cummins’ most sophisticated turbocharger to date, delivering high efficiency, excellent driveability and low emissions levels.

2014 - New addition to our range of larger turbochargers
Introduction of the Series 900 to the large turbocharger range, enabling Cummins Turbo Technologies to bring to market the most efficient turbochargers in this range with new technologies capable of improving overall turbocharger efficiency of a typical application by up to 10%.

Showcased a selection of next generation innovations capable of improving the fuel efficiency of modern diesel engines by at least 10% including Holset M2 Two-stage system with Rotary Turbine Control (RTC), Electrical Waste Heat Recovery Turbine Expander prototype, Next Generation HE300VG and Electric Wastegate.

2012 – First Holset VGT™ introduced to Brazil
The first Holset VGT is introduced in Brazil on the 8.9 litre ISL engine. To achieve higher air quality, Brazil’s government skipped the Euro IV equivalent, Conama P6 and jumped straight to the more stringent Conama P7, similar to Euro V legislation currently in place in Europe.

2011 – New test cell as Cummins Turbo Technologies leads the way on new technologies
A waste heat recovery test cell is opened. This test cell, designed internally, ideally places Cummins Turbo Technologies to lead on new technologies required for emerging fuel economy and CO2 legislation. It allows evaluation of the thermodynamic performance and durability of high speed turbine expander devices designed to work in an organic Rankine Cycle.

2010 – New turbochargers for 2-6 litre diesels launched
A new range of turbochargers for 2 to 6 litre diesel engines are launched at IAA Hannover and later in the year at the Beijing Engine Show.

2009 – First turbine expander prototype produced
The first turbine expander prototype is produced. It is a compact and efficient means of converting the energy from the vaporised organic fluid into useful mechanical or electrical work. It is one of the most promising technologies to allow improved vehicle fuel consumption and thereby reduce carbon dioxide emissions.

2007 – Increasing power whilst lowering emissions
The axial turbocompound is released on the Daimler DD15 engine in the USA. It is designed for heavy-duty trucks and provides an alternative to the use of variable geometry or two-stage turbocharging to achieve higher power at lower emissions.

2004 – Holset excels in training
Holset is recognised for its outstanding level of training. Peter Collins, Regional Manager of the Institute of Mechanical Engineers (IMechE) presents Holset with the accreditation award for its Monitored Professional Development (MPD) Scheme.

2003 - China facility opened
A new world class US$8 million technical and production facility in Wuxi opens, including test cells to run performance mapping and mechanical testing.

2002 – Queen's Award for innovative Holset VGT™
Prestigious Queen’s Awards for International Trade and Innovation received for the innovative Holset VGT.

Research work on an Electric Exhaust Gas Turbocharger is underway. The concept is to integrate an electric motor/generator into the rotor of a turbocharger, as a means of augmenting boost at lower engine speeds, to achieve estimated fuel savings of approximately 5%.

2001 - Premium wheels for durability improvement
Machined From Solid (MFS) aluminium impellers are designed for production turbochargers. These premium wheels offer a durability improvement over the standard cast wheels. They are designed for use on applications with arduous duty cycles. 

1998 - World's first sliding wall variable geometry turbocharger launched
The world’s first sliding wall variable geometry turbocharger is launched – Holset VGT™. This product goes on to win numerous awards and become the most successful product in the Holset Turbochargers range. The first heavy-duty volume production application of the Holset VGT is produced, the Holset HX55V. It was launched on the Iveco Cursor 8 engine.

1997 - Turbo technologies are the way forward
Holset is now purely focused on turbocharging technology following the sale of the other business units (including vibration dampers) the previous year. The first production wastegate is produced in China.

1994 - Testing thermal stress and fatigue
The first Finite Element Analysis tests are performed to assess thermal stress and fatigue of turbine housings. This is carried out on 2D axis-symmetric sections.

1990 - First commercial automotive turbocompound engine released
The first commercial automotive turbocompound engine is released by Holset and Scania with an additional radial power turbine downstream of the turbocharger.

A pan-European 3 year grant is awarded to develop variable geometry (VG) technology for commercial diesel trucks together with four partners: Bosch, Magnetti Marelli, Iveco and ZF. The first European heavy-duty wastegate goes into production, the WH2D. It achieves a target life of 750,000 km.

1989 – Variable geometry trials begin
Early trials of the variable geometry turbochargers commences at the Royal Armament Research & Development Establishment (RARDE) on the VH2D tracked vehicle trials.

1988 – Aerodynamics in 3D
A 3D viscous flow analysis programme is introduced and along with the 2D inviscid flow analysis programme reduced the aerodynamic design phase from 13 weeks to 3-4 weeks.

1987 -Turbochargers get smaller but more efficient
The development of smaller and more efficient range of turbochargers commences. This leads to the production of the HX30 and HX40 range, replacing the H Series.

1986 – Compressor range increased
Map width enhancement (MWE) is invented and patented. This increases the map width, or range of the compressor by 20%.

1985 – Turbochargers go the distance
Turbocharger durability is now improved to reach 500,000 miles

1983 – Life in the fast lane
Holset turbocharger’s reign in motorsport begins with victory in the Indy Race Car Championship and debut in Formula One on the Toleman-Hart 1.5 litre turbocharged 4-cylinder racing car driven the subsequent year by Ayrton Senna.

A laser anemometer is installed enabling gas velocities to be measured inside rotating wheels.

1980 – Impressive efficiencies gained
Vaned diffuser and compressor wheel technology improved, achieving 82% compressor efficiency at 4:1 pressure ratio.

1974, 75 & 79 - Computers aid turbocharger improvements
In 1974 the first computerised stress analysis method is used providing a detailed insight into the wear and tear the turbocharger is exposed to in the engine.  A high speed turbine dynamometer is also introduced to measure torque and speed to calculate efficiency, highlighting the importance of information capture to aid turbocharger development. In 1975 an engineering computer was purchased and would be used to match turbos, design rotors, bearings and wheels. This period of change also saw the first ‘backswept’ compressor design introduced. The now familiar Computer Aided Design (CAD) system was introduced at Holset.

1973 – Holset and Cummins unite
Holset becomes part of Cummins and the new ‘H’ range is launched with the release of the H1 turbocharger.

1965 & 1967 – Turbocharger design becomes increasingly sophisticated
The Model 3LD is the first design without a nozzle ring; the gas flow is controlled by the turbine housing volute passage. In 1967 the  4LE model is released with a water cooled turbine housing for marine applications.

1960 – Testing facilities improve turbocharger reliability
Dedicated test cells help to check that all turbochargers meet design ratings prior to despatch worldwide.

1958 - Turbocharger manufacturing facility gets green light
Ron Hesselden gets the green light to build a turbocharger manufacturing facility which was ready to commence production in September.

1957 - A key milestone in Holset history
A Licence agreement signed between Holset Engineering Co. Ltd. and Schwitzer Corporation of Indianapolis, USA for the manufacture and sale of turbochargers and rubber dampers across Europe. This agreement moved the company firmly into the turbocharger business and at this time Holset was the only company in the world capable of handling torsional vibration issues across the whole spectrum of internal combustion engines. In the same year a breakthrough had also been made in lightweight automotive turbocharger design.

1952 - Holset is incorporated