Estimation of In-Cylinder Inhomogeneity in a Port-Fuel-Injected Spark-Ignition Engine at Cold Start

In-cylinder inhomogeneity in a port-fuel-injected (PFI) spark-ignition (SI) engine at cold start is investigated experimentally. The equivalence ratio distribution in cylinder is described assuming a normal distribution. The standard deviation, the degree of inhomogeneity, is determined based on the exhaust gas analysis. Before experiments, all the experimental setup including fuel is soaked for ten hours at defined soak temperatures. The test engine is driven by using a starter motor at a constant speed of 350 rpm and the fuel is injected once at a certain cycle. Just after the injection, the engine is stopped and the exhaust gas is rapidly confined using a solenoid valve installed downstream the exhaust valve. By using an FID, the exhaust mass of fuel is calculated. Without spark, the amount of fuel trapped in cylinder is measured. With the spark (with combustion), the amount of fuel trapped but not involved in combustion is measured. The standard deviation of equivalence ratio in cylinder is determined so that the exhaust mass of fuel estimated by model consistently reproduce the experimental results. The standard deviation of mixture is shown to be on the order of unity for a conventional configuration of PFI SI engine.

• Record URL:
  https://doi.org/10.11351/jsaeronbun.52.826
• Record URL:
  https://www.jstage.jst.go.jp/article/jsaeronbun/52/4/52_20214583/_pdf
• 
• Record URL:
  https://scholar.google.com/scholar_lookup?title=Estimation%20of%20In-Cylinder%20Inhomogeneity%20in%20a%20Port-Fuel-Injected%20Spark-Ignition%20Engine%20at%20Cold%20Start&author=D.%20Suwa&author=H.%20Shinohara&author=M.%20Araki&author=P.%20Gonzalez&author=S.%20Shiga&publication_year=2021
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/02878321
• Authors:
  • Suwa, Daichi
  • Shinohara, Hironobu
  • Araki, Mikiya
  • Gonzalez Palencia, Juan C
  • Shiga, Seiichi
• Publication Date: 2021-7

Language

• English
• Japanese

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: pp 826-832
• Serial:
  • Transactions of Society of Automotive Engineers of Japan
  • Volume: 52
  • Issue Number: 4
  • Publisher: Society of Automotive Engineers of Japan
  • ISSN: 0287-8321
  • EISSN: 1883-0811
  • Serial URL: https://www.jstage.jst.go.jp/browse/jsaeronbun
• Publication flags:

  Open Access (libre)

Subject/Index Terms

• TRT Terms: Cold starts (Driving); Combustion; Engine cylinders; Fuel mixtures; Heterogeneity; Spark ignition engines
• Subject Areas: Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 01783001
• Record Type: Publication
• Source Agency: Japan Science and Technology Agency (JST)
• Files: TRIS, JSTAGE
• Created Date: Sep 27 2021 9:45AM