Abstract
The exhaust emissions from a single-cylinder spark ignition engine were measured as a function of burning time. Flame propagation time was measured with an ionizabion probe, and the exhaust gas was sampled with a gas sampling valve. Electronic control logic determined the cycles to be sampled, based on the flame propagation time. Tests were carried out at full throttle, for lean, optimum, and rich A/F. The exhaust components measured were CO, HC, O//2, H//2, and N//2 using a gas chromatograph. The emission most affected by CBCV is CO. Cycles that are either faster or slower than the mean cycle have increased CO, particularly at lean A/F where a five-fold difference in CO concentration was measured. HC emissions show a 150% change for the same conditions. For other than lean A/F operation, H//2 was an exhaust product, up to 6% at rich A/F operation.
| Original language | English (US) |
|---|---|
| Journal | SAE Prepr |
| Issue number | 741034 |
| State | Published - Jan 1 1974 |
| Externally published | Yes |
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All Science Journal Classification (ASJC) codes
- Engineering(all)
Cite this
CYCLE BY CYCLE VARIABILITY IN EMISSIONS OF A SPARK IGNITION ENGINE. / Milkins, E. E.; Watson, H. C.; Goldsworthy, L. C.; Hallworth, Richard J.
In: SAE Prepr, No. 741034, 01.01.1974.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - CYCLE BY CYCLE VARIABILITY IN EMISSIONS OF A SPARK IGNITION ENGINE.
AU - Milkins, E. E.
AU - Watson, H. C.
AU - Goldsworthy, L. C.
AU - Hallworth, Richard J.
PY - 1974/1/1
Y1 - 1974/1/1
N2 - The exhaust emissions from a single-cylinder spark ignition engine were measured as a function of burning time. Flame propagation time was measured with an ionizabion probe, and the exhaust gas was sampled with a gas sampling valve. Electronic control logic determined the cycles to be sampled, based on the flame propagation time. Tests were carried out at full throttle, for lean, optimum, and rich A/F. The exhaust components measured were CO, HC, O//2, H//2, and N//2 using a gas chromatograph. The emission most affected by CBCV is CO. Cycles that are either faster or slower than the mean cycle have increased CO, particularly at lean A/F where a five-fold difference in CO concentration was measured. HC emissions show a 150% change for the same conditions. For other than lean A/F operation, H//2 was an exhaust product, up to 6% at rich A/F operation.
AB - The exhaust emissions from a single-cylinder spark ignition engine were measured as a function of burning time. Flame propagation time was measured with an ionizabion probe, and the exhaust gas was sampled with a gas sampling valve. Electronic control logic determined the cycles to be sampled, based on the flame propagation time. Tests were carried out at full throttle, for lean, optimum, and rich A/F. The exhaust components measured were CO, HC, O//2, H//2, and N//2 using a gas chromatograph. The emission most affected by CBCV is CO. Cycles that are either faster or slower than the mean cycle have increased CO, particularly at lean A/F where a five-fold difference in CO concentration was measured. HC emissions show a 150% change for the same conditions. For other than lean A/F operation, H//2 was an exhaust product, up to 6% at rich A/F operation.
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M3 - Article
JO - SAE Prepr
JF - SAE Prepr
IS - 741034
ER -