{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,9]],"date-time":"2025-10-09T13:00:36Z","timestamp":1760014836547,"version":"build-2065373602"},"publisher-location":"400 Commonwealth Drive, Warrendale, PA, United States","reference-count":6,"publisher":"SAE International","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"abstract":"<div class=\"htmlview paragraph\">Few diesel vehicles engines from Czech production have been converted into gas (LPG, CNG) fuelled SI engines. The higher power engines (p<sub>eMAX<\/sub> &gt; 1 MPa) used the concept \u03bb \u00bb1 in turbocharging-intercooler and with oxidation catalysts mode with total (max) efficiency of about 38%. For lower power engines (p<sub>eMAX<\/sub> &lt; 1 MPa) the more suitable concept was using \u03bb=1 in naturally aspirated (atmospheric) mode with 3-way catalysts. Most of the work included the development of the engines to work on Natural Gas (CNG) and LPG for buses and medium trucks. Some laboratory tests were done also with Hydrogen and Natural Gas on the laboratory single-cylinder engine.<\/div>\n<div class=\"htmlview paragraph\">The measurements consists of standard emissions (CO, HC, NOx, CO<sub>2<\/sub>, PM) but Polycycle Aromatic Hydrocarbons (PAH and their carcinogenic derivatives PAH<sub>carc<\/sub>) were also investigated. Combustion stability was assessed by means of Coefficient of MIP (indicated mean effective pressure) Variation (VARp<sub>i<\/sub>) for lean and very lean gas fuelled engines. The effect of Rate of Heat Release on VARp<sub>i<\/sub> was also investigated.<\/div>\n<div class=\"htmlview paragraph\">Finally, the development of the combustion chamber design for a bus gas engine during a period of 7 years is shown and discussed, showing the improvements in various areas such as total efficiency, power and emissions.<\/div><\/jats:p>","DOI":"10.4271\/2001-01-0144","type":"proceedings-article","created":{"date-parts":[[2010,10,4]],"date-time":"2010-10-04T13:40:21Z","timestamp":1286199621000},"source":"Crossref","is-referenced-by-count":18,"title":["The Development of Gas (CNG, LPG and H2) Engines for Buses and Trucks and their Emission and Cycle Variability Characteristics"],"prefix":"10.4271","volume":"1","author":[{"given":"Stanislav","family":"Beroun","sequence":"first","affiliation":[{"name":"Techn. Univ. Liberec - Czech Republic"}]},{"given":"Jorge","family":"Martins","sequence":"additional","affiliation":[{"name":"Univ. Minho - Portugal"}]}],"member":"2796","published-online":{"date-parts":[[2001,3,5]]},"reference":[{"key":"ref0","unstructured":"HOLLEMANS, B. VOOGD, A. WEIDE, J. Europan Technologies to Reach ULEV Emissions for Gaseous Fuels in Combination with Fuel Consumption Reduction Metha-Motion-European Conference London 1995"},{"key":"ref1","unstructured":"HOLLEMANS, B. LPG a Clean and Efficient Motor Fuel - Regulated and Non Regulated Emissions of a Commercially Attrective LPG Vehicle The Commomnwealth Conference and Events Centre London 1996"},{"key":"ref2","unstructured":"CHMELA, F.,G. KAPUS, P., E. CARTELLIERI, W., P. Alternative Fuels for Automotive Engines CATEC Symposium Beijing 1997"},{"key":"ref3","unstructured":"BEROUN, S. BLA\u017dEK, J. POSP\u00cd\u0160IL, M. Emission of solid particulates and unburned hydrocarbons by diesel and gas engines MOTORSYMPO 99 Brno 1999"},{"key":"ref4","unstructured":"SCHOLZ, C. Combustion variability of spark ignition hydrogen burning engines MOTORSYMPO 99 Brno 1999"},{"key":"ref5","unstructured":"BEROUN, S. Importance of the Combustion Chamber Form for the Quality of the Gas Engines VII th International Scientific Conference MOTAUTO Sofia 2000"}],"event":{"name":"SAE 2001 World Congress","start":{"date-parts":[[2001,3,5]]},"number":"50026","location":"Detroit, Michigan, United States","acronym":"ANNUAL"},"container-title":["SAE Technical Paper Series"],"original-title":[],"link":[{"URL":"https:\/\/saemobilus.sae.org\/downloads\/papers\/2001-01-0144\/Full%20Text%20PDF","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,4]],"date-time":"2025-10-04T21:06:48Z","timestamp":1759612008000},"score":1,"resource":{"primary":{"URL":"https:\/\/saemobilus.sae.org\/papers\/development-gas-cng-lpg-h2-engines-buses-trucks-emission-cycle-variability-characteristics-2001-01-0144"}},"subtitle":[],"proceedings-subject":"SAE Technical Paper Series","short-title":[],"issued":{"date-parts":[[2001,3,5]]},"references-count":6,"URL":"https:\/\/doi.org\/10.4271\/2001-01-0144","relation":{},"ISSN":["0148-7191","2688-3627"],"issn-type":[{"type":"print","value":"0148-7191"},{"type":"electronic","value":"2688-3627"}],"subject":[],"published":{"date-parts":[[2001,3,5]]},"article-number":"2001-01-0144"}}