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A Promising Oil-engine Development

17th January 1936
Page 49
Page 49, 17th January 1936 — A Promising Oil-engine Development
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Keywords :

Tekon

T ekon Concern Acquires Recently Patented Gaspar Design for W hich Important Advantages are Claimed

AN interesting design of oil-engine combustion chamber, patented (No. 437.887) by Mr. E. Gaspar, was described in The Commercial Motor dated December 20, 1935. We are now asked to state that the rights of this invention have been acquired by Tekon Development, Ltd., Aldwych House, Aldwycli, London, W.G2, which concern has given us some interesting information concerning the claims made for the design, and certain results, in connection with air velocities, obtained from tests of an Ailsa Craig single-cylindered oil engine, in which it has been embodied. We understand that two prominent oil-engine makers are interesting themselves in the design.

The accompanying drawing clearly shows the shape and layout of the combustion chamber and injector. The aim of the design is to combine the advantages of the direct-injection and air-cell principles, whilst eliminating their drawbacks.

It is claimed that this has been accomplished by reducing the surface-to-volume ratio, by increasing the cross-section and minimizing the length of the interconnecting ports and by improving the control of the air swirl.

The application of the patent permits the use of heatresisting material for the air cell, and enables a satisfactory mounting incorporating no screwed parts (other than the studs) to be employed.

As a result, heat losses are small, whilst the energy absorbed in producing the air swirl is low. Consequently, fuel-consumption returns are good„ and starting from cold is facilitated. We have inspected curves showing air velocities against crank angle, and comparing 'the Tekon head with another of well-known design. They reveal, in the case of the former, that maximum velocity is higher, that it occurs immediately after, instead of just before the point at which injection cominences, and that the area included by the curve, indicating the work done in creating turbulence, is much lower.

Larger communicating passages afford good scavenging. Thus volumetric efficiency is high, and better torque characteristics are obtained. These points are of especial importance in the case of small high-speed engines.

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People: E. Gaspar
Locations: London

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