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Stephen Wallman, shows his gold medal and the three-way catalytic converter with lambda-sond

May 14, 2008 ID: 15300
Stephen Wallman, shows his gold medal and the three-way catalytic converter with lambda-sond
The world’s perhaps most important invention for controlling exhaust emissions on cars was developed at Volvo Car Corporation in the early 1970s. Under the leadership of the legendary environmental expert Stephen Wallman, the three-way catalytic converter controlled by an oxygen sensor was introduced. Mr. Wallman has now been awarded the Royal Swedish Automobile club’s gold medal.
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