Title: Nissan's emission control systems to meet Japanese automotive emissions standards

Authors: M. Onoda

Addresses: Senior Research Engineer, Engine Research Dept., Central Engineering Laboratory, Nissan Motor Co., Ltd., Yokosuka, Japan

Abstract: The Nissan Motor Company introduced the Nissan Anti-Pollution System (NAPS) in 1975 in response to a tightening of the Japanese emission control standards. The more stringent standards of 1978, requiring an NOx reduction of at least 80%, made a further improvement of NAPS necessary. To effect this improvement Nissan carried out a series of studies. The stabilisation of combustion and the effective induction of heavy exhaust gas re-circulation (EGR) were studied with the aim of reducing NOx with a heavy EGR. A study of a three-way catalyst system was also made with a view to reducing NOx after emission from the cylinder. As a result of these studies, Nissan|s models were equipped with the three most appropriate NAPS systems. These systems are described.

Keywords: vehicle design; engine design; internal combustion engine; emission control; NOx reduction; exhaust gas re-circulation; EGR; three-way catalyst system; electronically controlled fuel-injection system; stabilisation of combustion; fuel economy; driveability; O2 sensors; fast-burn engine; oxidation catalyst; Nissan.

DOI: 10.1504/IJVD.1980.061239

International Journal of Vehicle Design, 1980 Vol.1 No.5, pp.454 - 466

Published online: 25 May 2014 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article