Improvement of Cold Startability Running on M85 Spark Ignition Engine

Paper #:
  • 920293

Published:
  • 1992-02-01
Citation:
Mitsumoto, H., Ohta, T., and Hamai, K., "Improvement of Cold Startability Running on M85 Spark Ignition Engine," SAE Technical Paper 920293, 1992, https://doi.org/10.4271/920293.
Pages:
8
Abstract:
Cold startability is one problem common to methanol vehicles because of methanol's low volatility. This study describes two necessary conditions for cold starting at -30°C: installing a cold start injector in the intake manifold and raising the Reid Vapor Pressure to 75.5 kPa. The cold start injector atomizes fuel to a 90- μ m average diameter in the intake ports and improves the mixture distribution at a temperature as cold as -30°C. Moreover, accomplishing cold starting requires that the indicated mean effective pressure of 686 kPa and above must be sustained until fast idling is reached.
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