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Tune-up Inspection a Continuing Emission Control
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English
Abstract
This paper presents results of a program conducted during 1968 to evaluate the capability of an engine tune-up inspection to reduce exhaust emission levels of a car population. Tune-up parameters such as ignition timing and carburetor idle mixture and speed were evaluated. The test sample included 478 privately-owned passenger cars, 1959 through 1968 models, being operated in the Los Angeles area.
As received average exhaust emission levels in this population were found to be 675 ppm HC and 2.73% CO. Adjustment of only idle speed and mixture reduced HC by 10 percent and CO by 16 percent, while oxides of nitrogen increases slightly. If applied to the car and light truck population of Los Angeles County, this tune-up program could result in reducing the daily output of hydrocarbon by 100 tons and carbon monoxide by 1050 tons. This in effect would advance the present automotive exhaust emission control program in California by 2 to 5 years.
Considering the small annual cost per car, less than $3, the effectiveness in reducing exhaust emissions to the atmosphere, and the high customer acceptance of the adjustments at 93 percent, this type annual minor tune-up approach is ideal for current statewide programs of emission control from the automobile.
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Dickinson, G., Ildvad, H., and Bergin, R., "Tune-up Inspection a Continuing Emission Control," SAE Technical Paper 690141, 1969, https://doi.org/10.4271/690141.Also In
References
- Bowditch F. W. Director of Emission Control, General Motors Corporation December 19 1968
- Roensch M. M. “Air Pollution Control - The Challenge of Automotive Engineers” Presented at SAE St. Louis Section Meeting May 1967
- Bowditch F. W. May 16 1968
- Department of Health, Education and Welfare “Control of Air Pollution from New Motor Vehicles and New Motor Vehicle Engines.” Federal Register 33 108 June 4 1968 8307 8311
- Hocker Arthur J. “Exhaust Emissions from Privately Owned 1966–1968 California Automobiles, A Statistical Evaluation of Surveillance Data” November 8 1968
- Brubacher M. L. Olson D. R. “Smog Tune-Up for Older Cars” Paper No. S403, SAE Southern California Section April 27 1964
- “Vehicle Inspection” September 10 1968
- Brubacher Miles L. Raymond John C. “Reduction of Vehicle Emissions by a Commercial Garage” Presented at the Seventh Technical Meeting, West Coast Section, Air Pollution Control Association October 20 1967
- Brubacher M. L. Olson D. R. “Smog Tune-Up for Older Cars” Paper No. S403, SAE Southern California Section April 27 1964