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Spray and Combustion Characteristics of HCCI Engine Using DME/Diesel Blended Fuel by Port-Injection Huazhong Univ. of Science and Tech
- Format:
- Conference/Event
- Author/Creator:
- Yu, Yu, author.
- Conference Name:
- International Powertrains, Fuels & Lubricants Meeting (2010-05-05 : Rio De Janeiro, Brazil)
- Language:
- English
- Physical Description:
- 1 online resource
- Place of Publication:
- Warrendale, PA SAE International 2010
- Summary:
- Homogeneous charge compression ignition (HCCI) is a newcombustion concept which achieves high efficiency, low nitrogenoxides (NOx), and particulates matter (PM) emissions. Inorder to realize the HCCI combustion, a homogenous mixturepreparation plays an important role in the HCCI engine. However, itis well known that diesel fuel is very difficult to achieve auniform mixture distribution within the engine cylinder because ofits high viscosity and poor fuel vaporization.In order to eliminate these problems, the low viscosity and highvolatility Dimethyl ether (DME) was added into diesel fuel toenhance the spray and atomization. The spray tip penetration andspray cone angle of DME/diesel-blended fuel has been examined byusing direct photography technology. Measurements were achieved byusing spray images taken with a high-resolution CCD camerasynchronized with strobe light. Results obtained reveal that thespray behavior and atomization are enhanced with the increase inDME ratio. Accordingly, the DME/diesel-blended fuel was injectedinto the manifold near the intake port by using pintle typeinjection nozzle. Then the fuel/air mixture was sucked into thecylinder, and HCCI combustion can be fulfilled. The premixed ratioof DME/diesel-blended fuel was estimated with various DME ratios,different intake temperature and injection pressure on a modifiedsingle-cylinder diesel engine. Based on the optimal parameters ofDME to diesel ratio and injection pressure, the combustion andemission characteristics are investigated for the diesel/DME HCCIengine at different intake air temperature
- Notes:
- Vendor supplied data
- Publisher Number:
- 2010-01-1485
- Access Restriction:
- Restricted for use by site license
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