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Smoke checks in MoT tests
Page 36
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THE introduction of smoke-emission checks into the Ministry of Transport's commercial vehicle tests starting next year was stressed by Dr. Albert Parker at the Clean Air Conference, in Blackpool on Tuesday.
Last year, he estimated, petrol vehicles emitted 5.3m tons of carbon monoxide gas and 0.26m tons of unturned or partially burned hydrocarbons, whereas diesel vehicles discharged only 80,000 and 16,000 tons of the same materials respectively.
Correctly adjusted and maintained diesels did not emit clouds of smoke, he said. And he revealed that the technical committee of the National Society for Clean Air thought the recently prepared British Standard referring to fuel should quickly be revised. It was not so stringent as LTB's practice—or the practice of some engine makers.
Mr. Stephen Swingler, Minister of State, opening the conference, said he hoped to see street-level pollution cut by improved vehicle design rather than by legislation. Many filtering devices tested by Ministry experts had been found impractical; but they were pressing ahead with their task.