Innovative Carburetor Design with Dynamic Air to Fuel Ratio (AFR) Control for Improved Fuel Economy and Reduced Emissions

Author:

Simmons Timothy C.1,Markoski Larry J.1

Affiliation:

1. INI Power Systems

Abstract

<div class="section abstract"><div class="htmlview paragraph">An innovative carburetor system has been developed for use in single cylinder small engines. The carburetor has been implemented on a 79cc 4 stroke portable gasoline generator for the purposes of illustrating its effect in reducing emissions, engine deposits and improving fuel economy without re-jetting the carburetor. This method of carburetion dynamically tunes the venturi effect in the carburetor, allowing for air density, fuel viscosity and fuel type compensation for optimal AFR. Modified and stock generators were tested at various power levels, elevations and temperatures to simulate operational environments. The improvements in emissions and fuel consumption will be presented. In addition, the system has been designed as a bolt-on, low cost alternative to an EFI method of complying with emissions regulations for existing small engine applications.</div></div>

Publisher

Society of Automotive Engineers of Japan

Reference19 articles.

1. Consumer Product Safety Commission Safety Standard for Portable Generators 16 CFR Part 1241 Docket No. CPSC-2006-0057, RIN 3041-AC36 81 224 November 21 2016 https://www.federalregister.gov/documents/2016/11/21/2016-26962/safety-standard-for-portable-generators May 2017

2. Emmerich S.J. , Persily A.K. and Wang L. Modeling and Measuring the Effects of Portable Gasoline Powered Generator Exhaust on Indoor Carbon Monoxide Level (NIST Technical Note 1781) Feb 2013

3. Adrian Irimescu , Gabriel Vasiu , Tordai Gavrilă Trif Perfomance and emissions of a small scale generator powered by a spark ignition engine with adaptive fuel injection control Applied Energy 121 15 May 2014

4. Hushim Mohd Faisal , Ahmad Jais , Alimin , Batcha Mohd Faizal Mohideen , Mohd Ali Mas Fawzi , Rashid Luqman Abdul Port-Fuel Injection Systgem for Small 4-Stroke Single Cylinder Engine: An Experimental Framework 2nd International Conference on Mechanical and Manufacturing Engineering 2011

5. Crypton Equipment Understanding Exhaust Emissions http://www.crypton.co.za/Tto%20know/Emissions/exhaust%20emissions.html Apr. 4 2017

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