Toyota emission control systems for Japanese emission standards
by Y. Kimbara
International Journal of Vehicle Design (IJVD), Vol. 1, No. 4, 1980

Abstract: This paper outlines the three emission control systems employed by Toyota to meet Japanese emission standards. The first system known as the three-way catalyst system, is described as having the highest potential in terms of NOx control, fuel economy and engine power, and is applied to the heavier inertia-weight class models. The second system called the turbulence generating pot (TGP) with oxidation catalyst system, is applied to the middle-inertia-weight class cars. The oxidation catalyst system adopted for lower-inertia-weight class models completes the list. The paper concludes with a brief review of a number of other emission control devices: exhaust gas recirculation (EGR), secondary air supply and auxiliary air-fuel ratio control.

Online publication date: Sun, 25-May-2014

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