| 摘要 |
The addition of water, eg steam, to the engine charge is a relatively simple, single process for reducing both PM and NOx emission levels in turbo diesel internal combustion engines. The reaction between air, steam and high temperature carbon (PM) absorbs heat, lowering the maximum combustion temperature and hence NOx. The water may be demineralised and added into the intake air as steam or water spray, injected directly into the cylinder or included in the fuel. A secondary fuel may also be added, eg methanol/alcohol, to improve combustion of the primary diesel fuel. The methanol/alcohol may act as an anti-freeze additive. The components and consumables are readily obtainable and may be incorporated and retrofitted easily into existing designs of engines. |
