1971 Cars and the “New” Gasolines

Morris, William; Poskitt, R. W.

doi:10.4271/710624

Cited by 6 publications

(2 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From the experimental decays of and in RF discharges [l] ( y = 1.5% at 0.4 Torr, 85 W, ne -1O1O cm-3). Nevertheless they are less than those measured in a microwave discharge at 2450 MHz by Mearns and Morris 0, = 15% at 1 Torr, 120 W, ne -5 X 10" [20]. In order to explain these discrepancies we briefly report the kinetics of atoms in the low-pressure oxygen discharges.…”

Section: Atomic Oxygen Concentrationmentioning

confidence: 83%

Characterisation of a low-pressure oxygen discharge created by surface waves

Granier

Pasquiers

Boisse‐Laporte

et al. 1989

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

Low-pressure oxygen discharges created by surface waves are characterised. Three discharge characteristics, the electron-neutral collision frequency nu , the maintaining electric field Eeff and the power required to maintain one electron theta , are deduced from the measurement of the electron density. They are independent of the microwave power and are studied as functions of the tube diameter (8-52 mm), the pressure (0.05-2 Torr) and the excitation frequency (390 or 210 MHz). The concentrations of ground state and singlet molecular oxygen are measured by VUV absorption and the concentration ratio of singlet to ground state molecular oxygen is about 10%, whatever the microwave power and the pressure. The ground state atomic oxygen concentration is measured downstream from the discharge by VUV absorption. The dissociation rate increases with the microwave power but remains less than 5%. A power balance model in the discharge, i.e. calculation of theta , is performed and yields a relation between theta /N and Eeff/N (n being the total neutral density), which is in good agreement with the experimental results. Finally, similarity laws are shown in the form theta /N and Eeff/N (Nr), where r denotes the tube radius.

show abstract

Section: Atomic Oxygen Concentrationmentioning

confidence: 83%

Characterisation of a low-pressure oxygen discharge created by surface waves

Granier

Pasquiers

Boisse‐Laporte

et al. 1989

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…The slope of the regression lines indicates about 1.4% loss in fuel economy for each one octane number reduction in requirement. This slope is essentially the same as the slope of 1.5% per octane number derived when only one variable such as compression ratio or spark advance was used to reduce octane requirement and the resulting change in fuel economy was determined (31).…”

mentioning

confidence: 99%

Alternative Automotive Emission Control Systems

Cantwell

Jacobs

Pierrard

1974

ACS Symposium Series

View full text Add to dashboard Cite

Relationships developed between automotive exhaust emissions and ambient air quality levels have been used to establish the degree of emission control needed to meet the ambient air quality standards in major urban areas. Interim emission standards already established for 1975 appear to be more than adequate for congested urban areas and the existing 1974 standards appear more than adequate for the remainder of the country. The very low levels mandated by the 1970 Amendments to the Clean Air Act do not appear necessary. Emission control systems based on engine modifications and thermal reactors have been shown to provide the degree of emission control needed to achieve the ambient air quality goals and are compatible with the continued use of leaded gasoline. Exhaust lead traps have been shown to be a practical means to reduce lead emissions to the environment should such control be needed. The lead tolerant control systems used with high compression ratio engines are shown to have the potential to improve fuel economy to a greater degree than proposed catalytic systems used with unleaded gasoline and low compression ratio engines. Both approaches are shown to impose severe fuel economy penalties at the very stringent emission standards mandated by the 1970 Amendments to the Clean Air Act.

show abstract

Role of Lead Antiknocks in Modern Gasolines

Pahnke

Bettoney

1971

SAE Technical Paper Series

View full text Add to dashboard Cite

1971 Cars and the “New” Gasolines

Cited by 6 publications

References 5 publications

Characterisation of a low-pressure oxygen discharge created by surface waves

Characterisation of a low-pressure oxygen discharge created by surface waves

Alternative Automotive Emission Control Systems

Role of Lead Antiknocks in Modern Gasolines

Contact Info

Product

Resources

About