Method for Turbocharging Single Cylinder Four Stroke Engines

This paper presents a feasibility study of a method for turbocharging single cylinder, four-stroke internal combustion engines. Turbocharging is not conventionally used with single cylinder engines because of the timing mismatch between when the turbo is powered, during the exhaust stroke, and when...

Full description

Bibliographic Details
Main Authors: Buchman, Michael R., Winter, Amos
Other Authors: Massachusetts Institute of Technology. Department of Mechanical Engineering
Format: Article
Language:en_US
Published: ASME International 2015
Online Access:http://hdl.handle.net/1721.1/98220
https://orcid.org/0000-0002-4151-0889
https://orcid.org/0000-0003-2371-6784
_version_ 1826200301426704384
author Buchman, Michael R.
Winter, Amos
author2 Massachusetts Institute of Technology. Department of Mechanical Engineering
author_facet Massachusetts Institute of Technology. Department of Mechanical Engineering
Buchman, Michael R.
Winter, Amos
author_sort Buchman, Michael R.
collection MIT
description This paper presents a feasibility study of a method for turbocharging single cylinder, four-stroke internal combustion engines. Turbocharging is not conventionally used with single cylinder engines because of the timing mismatch between when the turbo is powered, during the exhaust stroke, and when it can deliver air to the cylinder, during the intake stroke. The proposed solution involves an air capacitor on the intake side of the engine between the turbocharger and intake valves. The capacitor acts as a buffer and would be implemented as a new style of intake manifold with a larger volume than traditional systems. In order for the air capacitor to be practical, it needs to be sized large enough to maintain the turbocharger pressure during the intake stroke, cause minimal turbo lag, and significantly increase the density of the intake air. By creating multiple flow models of air through the turbocharged engine system, we found that the optimal size air capacitor is between four and five times the engine capacity. For a capacitor sized for a one-liter engine, the lag time was found to be approximately two seconds, which would be acceptable for slowly accelerating applications such as tractors, or steady state applications such as generators. The density increase that can be achieved in the capacitor, compared to air at standard ambient temperature and pressure, was found to vary between fifty percent for adiabatic compression and no heat transfer from the capacitor, to eighty percent for perfect heat transfer. These increases in density are proportional to, to first order, the anticipated power increases that could be realized with a turbocharger and air capacitor system applied to a single cylinder, four-stroke engine.
first_indexed 2024-09-23T11:34:41Z
format Article
id mit-1721.1/98220
institution Massachusetts Institute of Technology
language en_US
last_indexed 2024-09-23T11:34:41Z
publishDate 2015
publisher ASME International
record_format dspace
spelling mit-1721.1/982202022-09-27T20:26:26Z Method for Turbocharging Single Cylinder Four Stroke Engines Buchman, Michael R. Winter, Amos Massachusetts Institute of Technology. Department of Mechanical Engineering Winter, Amos Buchman, Michael R. This paper presents a feasibility study of a method for turbocharging single cylinder, four-stroke internal combustion engines. Turbocharging is not conventionally used with single cylinder engines because of the timing mismatch between when the turbo is powered, during the exhaust stroke, and when it can deliver air to the cylinder, during the intake stroke. The proposed solution involves an air capacitor on the intake side of the engine between the turbocharger and intake valves. The capacitor acts as a buffer and would be implemented as a new style of intake manifold with a larger volume than traditional systems. In order for the air capacitor to be practical, it needs to be sized large enough to maintain the turbocharger pressure during the intake stroke, cause minimal turbo lag, and significantly increase the density of the intake air. By creating multiple flow models of air through the turbocharged engine system, we found that the optimal size air capacitor is between four and five times the engine capacity. For a capacitor sized for a one-liter engine, the lag time was found to be approximately two seconds, which would be acceptable for slowly accelerating applications such as tractors, or steady state applications such as generators. The density increase that can be achieved in the capacitor, compared to air at standard ambient temperature and pressure, was found to vary between fifty percent for adiabatic compression and no heat transfer from the capacitor, to eighty percent for perfect heat transfer. These increases in density are proportional to, to first order, the anticipated power increases that could be realized with a turbocharger and air capacitor system applied to a single cylinder, four-stroke engine. Massachusetts Institute of Technology. Department of Mechanical Engineering 2015-08-25T18:28:51Z 2015-08-25T18:28:51Z 2014-08 Article http://purl.org/eprint/type/ConferencePaper 978-0-7918-4634-6 http://hdl.handle.net/1721.1/98220 Buchman, Michael R., and Amos G. Winter. “Method for Turbocharging Single Cylinder Four Stroke Engines.” Volume 3: 16th International Conference on Advanced Vehicle Technologies; 11th International Conference on Design Education; 7th Frontiers in Biomedical Devices (August 17, 2014). https://orcid.org/0000-0002-4151-0889 https://orcid.org/0000-0003-2371-6784 en_US http://dx.doi.org/10.1115/DETC2014-35044 Volume 3: 16th International Conference on Advanced Vehicle Technologies; 11th International Conference on Design Education; 7th Frontiers in Biomedical Devices Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf ASME International Prof. Winter via Angie Locknar
spellingShingle Buchman, Michael R.
Winter, Amos
Method for Turbocharging Single Cylinder Four Stroke Engines
title Method for Turbocharging Single Cylinder Four Stroke Engines
title_full Method for Turbocharging Single Cylinder Four Stroke Engines
title_fullStr Method for Turbocharging Single Cylinder Four Stroke Engines
title_full_unstemmed Method for Turbocharging Single Cylinder Four Stroke Engines
title_short Method for Turbocharging Single Cylinder Four Stroke Engines
title_sort method for turbocharging single cylinder four stroke engines
url http://hdl.handle.net/1721.1/98220
https://orcid.org/0000-0002-4151-0889
https://orcid.org/0000-0003-2371-6784
work_keys_str_mv AT buchmanmichaelr methodforturbochargingsinglecylinderfourstrokeengines
AT winteramos methodforturbochargingsinglecylinderfourstrokeengines