Summary
Methods of Operation for Controlled Temperature Combustion Engines Using Gasoline-like Fuel, Particularly Multicylinder Homogenous Charge Compression Ignition (HCCI) Engines Available for Licensing
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Full Description
| Patent Information: USPTO Site Listing | |||
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| Patent Title: | Methods of Operation for Controlled Temperature Combustion Engines Using Gasoline-like Fuel, Particularly Multicylinder Homogenous Charge Compression Ignition (HCCI) Engines | ||
| Patent Number: | 7025042 | ||
| Issue Date: | 4/11/2006 | ||
| Lab Name: | National Vehicle and Fuel Emissions Laboratory | ||
| Location: | Ann Arbor, MI | ||
| Contact: | WVHTC Foundation |
| Technical Description: |
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| The patent provides methods for utilizing a control system in multicylinder homogenous charge compression ignition (HCCI) engines to maintain stable, efficient, low-emission combustion during both transient and steady-state engine operating conditions and to optimize individual cylinder combustion control. During transient conditions, the technology adjusts certain engine operating parameters (such as intake temperature, intake oxygen concentration, intake boost, engine cooling, etc.) followed by the necessary fuel adjustments. A closed-loop feedback system allows the controller to adjust the fuel on a cylinder-by-cylinder basis to achieve and maintain a target engine combustion parameter (such as location of peak cylinder pressure, maximum rate of cylinder pressure, etc.) based on a stored engine map to achieve the optimum combustion event for each cylinder. | |||
| Industry Significance: |
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| The technology provides several benefits over currently available methods for controlling combustion events in HCCI engines: controlling the initiation of combustion to the optimum timing (e.g., as determined by crank angle location) over the full range of engine speed and load conditions; capability to quickly transition from one engine speed/load operating condition to another; and method for adjusting the combustion event on an individual cylinder basis in a multicylinder engine during transient conditions (which requires very fast adjustments within a single engine cycle). The above benefits allow the technology to increase fuel economy and reduce the production of pollutants, such as NOx and PM, during the HCCI engine’s operation. |
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| Potential Applications: |
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| The primary application will be in the automotive power train industry, with opportunities for use by HCCI engines, also referred to as premixed charge compression ignition (PCCI) engines. Other applications which utilize HCCI engines as part of a power system will also benefit from the technology. | |||
| Partnership Opportunities: |
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The advantages of the technology in improving fuel economy and reducing pollutants may interest automotive manufacturers/suppliers and other HCCI engine providers. http://www.epatechmatch.com/EPA/PATENT/BROWSEFEATURED.ASPX#
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