David Garside
David W. Garside is an inventor
Personal history
In his book "Norton Rotaries", Kris Perkins states that "David Garside could rightly be called the father of the Norton Rotary". Garside studied mathematics and mechanical engineering at
The Norton Classic
Garside, who had been impressed by the
Wankel engines run very hot, of evaporation.
Even so, at 50 °C (122 °F) the fuel-air mixture was still hotter than ideal, and the engine's volumetric efficiency remained somewhat impaired. The eccentric shaft's main bearings and the inlet manifolds were fed by oil-injection lubrication, and the fuel-air mix also carried residual mist of oil from the interior of the rotors, which helped to lubricate the rotor tips.[10]
Notable innovations
To address the deficiencies of the air-cooled Norton Wankel engine, Garside went on to develop SPARCS (self-pressurising-air rotor cooling system),[11] a system that utilises self-pressurising blow-by gases as a cooling medium, absorbing higher levels of heat from the engine core and dispersing the heat by means of an external heat exchanger. This system provides superior heat rejection than standard air cooling methods.[12]
In addition to SPARCS, Garside also filed a patent in 2011 to develop a rotary exhaust expander unit or CREEV (compound rotary engine for electric vehicles) for use with Wankel rotary engines.[13] The CREEV system acts as an ‘exhaust reactor’ by consuming unburned exhaust products while expansion occurs, reducing overall emissions and improving thermal efficiency.[14]
In 2015, David Garside signed a licensing agreement with UK Midlands based engineers Advanced Innovative Engineering (UK) Ltd for exclusive use of his patents in their next generation Wankel rotary engines.[15]
Aero-engine derivative
The Norton Wankel engine was further developed at Staverton airport into the MidWest aero-engine. The MidWest engine's output increased from BSA's 85 bhp to nearly 110 bhp[16] by improving volumetric efficiency. This was achieved by feeding pressurised air to cool the rotors which was then dumped overboard (rather than fed to the combustion chambers); the engine received a fuel-air mixture with cool ambient air.[17]
References
- ^ Garside's patents [1]
- ISBN 978-0-7864-2905-9
- ^ Denniss, Tony (1990). "The Norton Rotary". Retrieved 14 August 2011.
- ISBN 978-1-85532-181-6.
- ISBN 978-1-85532-181-6.
- ^ "Bike" magazine Summer 1973
- ^ Note: unlike a reciprocating engine, where the combustion chamber is cooled by the incoming fuel-air charge, a Wankel engine's combustion zone is never cooled in this way and so always stay very hot.
- ^ "Cycle World" magazine February 1971
- ^ Bill Murray monograph 1985: "The decline of the British motorcycle industry"
- ^ Bill Murray monograph 1985: "The decline of the British motorcycle industry"
- ^ "World Intellectual Property Organization Pub. No: WO2009101385". World Intellectual Property Organization.
- ^ Ian, Bamsey (April 2016). "Cool Running". Unmanned Systems Technology Magazine (7).
- ^ "World Intellectual Property Organization Pub. No: WO/2009/115768". World Intellectual Property Organization.
- ^ "CREEV | Advanced Innovative Engineering (UK) Ltd". Retrieved 20 September 2016.
- ^ https://www.aieuk.com/aie-sign-exclusive-licence-agreement-use-patented-engine-technology/
- ^ MidWest Engines Ltd AE1100R Rotary Engine Manual
- ^ The MidWest engines were both water-cooled (the rotor chambers having cooling jackets) and air-cooled, with a belt-driven centrifugal pump forcing pressurised cool air through the engine's interior.