Title: Toyota emission control systems for Japanese emission standards
Authors: Y. Kimbara
Addresses: Engine Engineering Department, Toyota Motor Co., Ltd. Toyota, Japan
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.
Keywords: air-fuel ratio; carburettor; electronic control; electronic fuel injection; EFI; emission control; emission standards; exhaust gas recirculation; EGR; feedback; liquefied petroleum gas; LPG; O2 sensor; open loop control; closed loop control; stoichiometry; turbulence generating pot; TGP; Toyota.
International Journal of Vehicle Design, 1980 Vol.1 No.4, pp.311 - 327
Published online: 25 May 2014 *
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