Why Intake Charge Dilution Decreases Nitric Oxide Emission from Spark Ignition Engines

710009

02/01/1971

Event
1971 Automotive Engineering Congress and Exposition
Authors Abstract
Content
This study was undertaken to develop a better understanding of how intake charge dilution by various gases affected nitric oxide (NO) emission from a single-cylinder spark ignition engine. Carbon dioxide, nitrogen, helium, argon, steam, and exhaust gas were individually added to the intake charge of a propane-fueled, single-cylinder engine operated at constant speed and load. Nitric oxide emission was reduced in all cases. The gases with higher specific heats gave larger NO reductions. The product of diluent flow rate and specific heat correlated with NO reduction. The effects of diluents on calculated combustion temperature, mbt spark timing, and fuel consumption are also presented and discussed.
Meta TagsDetails
DOI
https://doi.org/10.4271/710009
Pages
11
Citation
Quader, A., "Why Intake Charge Dilution Decreases Nitric Oxide Emission from Spark Ignition Engines," SAE Technical Paper 710009, 1971, https://doi.org/10.4271/710009.
Additional Details
Publisher
Published
Feb 1, 1971
Product Code
710009
Content Type
Technical Paper
Language
English