Youtor
The secondary air system Part 1 Design function components
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=dod7xZceY7Q
How does the secondary air system work? • What components is it made up of? • What is secondary air? • What does the secondary air pump do? • What is the function of the secondary air valve? • In this video you can find out what makes up the secondary air system and how it works. • 00:00 Cold start and emissions • 01:00 Design and function of the secondary air system • 01:41 Secondary air pump and secondary air valve • 02:21 Emission control • With spark-ignition engines, the greatest pollution occurs on cold starting. Secondary-air systems have been successfully employed to reduce such cold starting emissions. • A “rich mixture”, i.e. a mixture with excess fuel, is required for starting a cold spark-ignition engine. • Until the catalytic converter reaches operating temperature and Lambda control action starts to take effect, large quantities of carbon monoxide and unburnt hydrocarbons are produced. • To reduce the level of these pollutants, ambient air with a high oxygen content (“secondary-air”) is injected into the exhaust manifold directly downstream of the exhaust valves during the cold starting phase. This results in post-oxidation (“afterburning”) of the pollutants to form carbon dioxide and water. • The heat generated in this process additionally warms the catalytic converter and speeds up the onset of Lambda control action. • Read more: https://www.ms-motorservice.com/int/e... • - - - - - - - • Further technical information for you: • Service information: • mam.kspg.com/mc/epaper?guid=14c1145d17ae932c • • Knowledge transfer via video on our website: • http://www.ms-motor-service.com/en/re... • Our video podcasts provide you with useful information on our products, such as hands-on fitting instructions and system descriptions. • Facebook: / motorserviceg. . • Twitter: / msmotorservice • Website: http://www.ms-motorservice.com
#############################
