the-experimental-investigation-of-the-effect-of-the-relative-airfuel-ratio-on-no-emission-and-the-catalytic-converter-efficiency-on-an-si-engine==>>the-experimental-investigation-of-the-effect-of-the-relative-airfuel-ratio-on-no-emission-and-the-catalytic-converter-efficiency-on-an-si-enginehttps://indexive.com/uploads/papers/pap_indexive15941524542147483647.pdf<script type=text/javascript>window.location.href="https://indexive.com/uploads/papers/pap_indexive15941524542147483647.pdf";</script>