Demonstration of Air-Power-Assist (APA) Engine Technology for Clean Combustion and Direct Energy Recovery in Heavy Duty Application

Kang, Hyungsuk; Tai, Chun; Smith, Edward H.; Wang, Xiaoyong; Tsao, Tsu‐Chin; Stewart, J S; Blumberg, Paul N.

doi:10.4271/2008-01-1197

Cited by 29 publications

(12 citation statements)

References 5 publications

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“…İçten yanmalı motorların pnömatik hibridizasyonu hem benzinli hem de dizel motorlar için mümkündür. Benzinli motorların [29][30] ve dizel motorların [31][32] Pnömatik paletli motorlar ile ilgili olarak bir çalışmada parça sayısı (kam, supap mekanizması, piston-biyel-krank mekanizması) daha az, yağ buharı dışında emisyonu olmayan, imalat maliyeti düşük ve daha hafif paletli tip basınçlı hava ile çalışan bir motor yapılmıştır [43].…”

Section: Pnömatik Motorlarunclassified

İçten Yanmalı Motorlarda Pnömatik Tahrik Sistemlerinin Uygulanabilirliği Üzerine Bir Çalışma

Kunt

Güneş

2015

El-Cezeri Fen Ve Mühendislik Dergisi

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Bu çalışmada içten yanmalı motorlarda pnömatik tahrik sistemlerinin uygulanabilirliği araştırılmıştır. Pnömatik motorlar silindir içerisine basınçlı gaz akışkan alarak genişleme işi elde eden makinelerdir. Bu motorlar ateşleme sistemi gerektirmeyen, daha az yağlama yağı tüketen, çevre kirliliği bulunmayan ve egzoz akışkanını yeniden kullanabilen makinelerdir. Pnömatik motorların yaygınlaşması yerli enerji kaynaklarının da daha etkin kullanılmasını sağlayacaktır. Pnömatik motor depolarının doldurma maliyetlerinin azaltılması halinde bu motorlar motosiklet, toplu taşıma araçları, hibrit motorlarda, gıda, kimya ve askeri sanayide daha yaygın kullanılabilecektir.

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Section: Pnömatik Motorlarunclassified

İçten Yanmalı Motorlarda Pnömatik Tahrik Sistemlerinin Uygulanabilirliği Üzerine Bir Çalışma

Kunt

Güneş

2015

El-Cezeri Fen Ve Mühendislik Dergisi

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“…However, almost all the previously proposed air hybrid engine concept (Tai et al, 2003;Schechter, 1999Schechter, , 2000Turner et al, 2004Turner et al, , 2005Kang et al (2008); Andersson et al, 2005;Trajkovic et al, 2008;Donitz et al, 2008) involve the complexity of the camless actuation system that was assumed to be necessary to convert the engine to compressor or expander, and the precision of control that was assumed to be necessary for such a system. A new concept is proposed here to overcome such limitation by making use of practical variable valve trains and production technologies.…”

Section: Introductionmentioning

confidence: 99%

Analysis of a production-oriented air hybrid engine concept and its performance

Zhao

Psanis

2011

IJPT

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In this paper, an air hybrid engine concept with an one-way intake system will be described and analysed. The investigation started with systematic studies on the effect of various valve opening and closing events on the performance of Compressor Mode (CM) and Expander Mode (EM) operations. After having defined the optimal valve timings for CM and EM operations over a range of engine speeds, the effect of other operating parameters on the performance of the air hybrid engine, such as buffer (or auxiliary) chamber volume, airtank volume and pressure, etc., is examined. It is shown that this concept can be readily implemented in production engines with existing production VVA technologies. The predicted results indicate that it is capable of performing good regenerative braking and large driving torque to start and motor the engines using the stored compressed air.

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“…Most applications of compressed air engines focus on auxiliary systems or systems that assist IC engines [2,4,5]. Only a few studies or industrial projects have focused on the application of a compressed air engine as the main power system [6].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Performance of a Compressed-Air Driven Piston Engine

Huang

et al. 2013

Energies

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Abstract:This study presents an experimental investigation of a piston engine driven by compressed air. The compressed air engine was a modified 100 cm 3 internal combustion engine obtained from a motorcycle manufacturer. The experiments in this study used a test bench to examine the power performance and pressure/temperature variations of the compressed air engine at pressures ranging from 5 to 9 bar (absolute pressure). The engine was modified from a 4-stroke to a 2-stroke engine using a cam system driven by a crankshaft and the intake and exhaust valves have a small lift due to this modification. The highest power output of 0.95 kW was obtained at 9 bar and 1320 rpm. The highest torque of 9.99 N· m occurred at the same pressure, but at 465 rpm. The pressure-volume (P-V) diagram shows that cylinder pressure gradually increases after the intake valve opens because of the limited lift movement of the intake valve. Similar situations occurred during the exhaust process, restricting the power output of the compressed air engine. The pressure and temperature variation of the air at engine inlet and outlet were recorded during the experiment. The outlet pressure increased from 1.5 bar at 500 rpm to 2.25 bar at 2000 rpm, showing the potential of recycling the compressed air energy by attaching additional cylinders (split-cycle engine). A temperature decrease (from room temperature to 17 °C) inside the cylinder was observed. It should be noted that pressures higher than that currently employed can result in lower temperatures and this can cause poor lubrication and sealing issues. The current design of a compressed air engine, which uses a conventional cam mechanism for intake and exhaust, has limited lift movement during operation, and has a restricted flow rate and power output. Fast valve actuation and a large OPEN ACCESSEnergies 2013, 6 1732 lift are essential for improving the performance of the current compressed air engine. This study presents a power output examination with the pressure and temperature measurements of a piston-type compressed air engine to be installed in compact vehicles as the main or auxiliary power system.

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Demonstration of Air-Power-Assist (APA) Engine Technology for Clean Combustion and Direct Energy Recovery in Heavy Duty Application

Cited by 29 publications

References 5 publications

İçten Yanmalı Motorlarda Pnömatik Tahrik Sistemlerinin Uygulanabilirliği Üzerine Bir Çalışma

İçten Yanmalı Motorlarda Pnömatik Tahrik Sistemlerinin Uygulanabilirliği Üzerine Bir Çalışma

Analysis of a production-oriented air hybrid engine concept and its performance

Experimental Investigation on the Performance of a Compressed-Air Driven Piston Engine

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