Rolls-Royce Archives
         « Prev  Box Series  Next »        

From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Summary of methods to prevent continuous explosions in the silencer.

Identifier  ExFiles\Box 66\2\  scan0233
Date  23th August 1926
  
Contd. -5- Hs{Lord Ernest Hives - Chair}/ACL1/T23.8.26.

opening up and again perhaps just after shutting the throttle.
At present we know no means of preventing this.

Our next step in this direction is to see to what
extent the governor tends to keep the throttle away from
this optimum value and what would be required of the governor
to appreciably reduce the trouble.

SUMMARY:-

Continuous explosions in the silencer can be
prevented by the following means :-

1. By admitting air to the induction pipe, but we have
been unable to make this work automatically by means of
a spring loaded suction valve because the depression in
the induction pipe under low speed conditions is higher
than obtained in some cases when silencer explosions occur.

2. By richening the mixture to give steady firing in
the cylinder.

3. It is not necessary for the throttle to be entirely
shut for all motoring speeds but the lower the speed
the more the throttle has to be closed to prevent
explosions. For low speeds it is necessary to shut
throttle.

Hs{Lord Ernest Hives - Chair}/ACL.
  
  


Copyright Sustain 2025, All Rights Reserved.    whatever is rightly done, however humble, is noble
An unhandled error has occurred. Reload 🗙