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Bus noise

28th May 1983, Page 21
28th May 1983
Page 21
Page 21, 28th May 1983 — Bus noise
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THE BUS MANUFACTURER is on "a hiding to nothing" in meeting the noise limits for passenger vehicles due later this year according to David Burnicle, technical director of Leyland Bus.

Speaking at a seminar on truck and bus noise organised by the Institution of Mechanical Engineers, Mr Burnicle said that the 1983 limits could be met but it would be at a cost of diminishing the number of special options available to the operator.

(The 1983 limits to directive 77/212/EEC set a maximum limit of 82 dB(A) for vehicles with more than 12 seats and grossing more than 35 tonnes and 85 dB(A) for the same but with engines of more than 147kW (200 bhp)).

Mr Burnicle went on to say that for manufacturers to meet these limits would impose an inevitable cost and weight penalty.

Backing up Mr Burnicle, National Bus engineering director Peter Wyke Smith said that, in general, engine manufacturers have opted for turbocharging which he claimed can save up to 3dB(A).

However, he explained that in spite of the theoretical benefits in increased power, improved fuel consumption and reduced thermal loading, experience has shown that problems with turbocharged engines can actually increase maintenance costs.


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