Prospectus of ignition enhancement in a two-stroke SI engine

Conference · Fri Dec 01 04:00:00 EST 1995

OSTI ID:198700

Manivannan, P V; Ramesh, A ^[1]; Poola, R B ^[2]; Dhinadgar, S J ^[3]

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1. Indian Inst. of Tech., New Delhi (India)
2. Argonne National Lab., IL (United States)
3. Tata Engineering & Locomotive Co., New Delhi (India)

Conventional two-stroke spark-ignition (SI) engines have difficulty meeting the ignition requirements of lean fuel-air mixtures and high compression ratios, due to their breaker operated, magneto-coil ignition systems. In the present work, a breakerless, high-energy electronic ignition system was developed and tested with and without a platinum-tipped electrode spark plug. The high-energy ignition system showed an improved lean-burn capability at high compression ratios relative to the conventional ignition system. At a high compression ratio of 9:1 with lean fuel-air mixtures, the maximum percentage improvement in the brake thermal efficiency was about 16.5% at 2.7 kW and 3000 rpm. Cylinder peak pressures-were higher ignition delay was lower, and combustion duration was shorter at both normal and high compression ratios. Combustion stability as measured by the coefficient of variation in peak cylinder pressure was also considerably improved with the high-energy ignition system.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: Indian Inst. of Tech., Madras (India)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 198700
• Report Number(s): ANL/ES/CP--87093; CONF-950942--1; ON: DE96002705
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
COMBUSTION CHAMBERS
FUEL-AIR RATIO
IGNITION SYSTEMS
PULSE CIRCUITS
PULSE TECHNIQUES
SPARK IGNITION ENGINES
THERMAL EFFICIENCY