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Toyota Status Report on Low Emission Concept Vehicles
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1972 by SAE International in United States
Annotation ability available
The status of Toyota's development of low emission concept packages-
- 1.NOx and HC/CO Catalytic Converter and EGR,
- 2.Thermal Reactor, NOx and HC/CO Catalytic Converter and EGR and their components is described.
- Variations of thermal reactor design, performance and durability characteristics are discussed.
- Above the throttle valve entry EGR has been found to have desirable flow characteristics with a simple control system.
- EGR rate over 15% brings about unacceptably poor driveability and fuel economy with smaller vehicles.
- Many types of catalytic converters for pelleted catalysts have been designed and examined for their performance and durability. A down-flow type converter has relatively good flow distribution and warm-up characteristics.
- As for HC and CO, a few prototype vehicles have met the 1975 Federal Regulation at low mileage, but the 1976 regulation for NOx of 0.4 gm./mi. is very difficult to meet even with a significant penalty in driveability and economy for our smaller vehicles.