Additive-mixing fuel-injection system for internal combustion engines
| DWPI Title: Method for controlling timing of combustion in internal combustion engine e.g. diesel engine, involves actuating fuel-additive supply valve in series of one or more pulses during each engine cycle to meter amount of additive into fuel |
| Abstract: A system and method for fast control of the timing of combustion in an internal combustion engine, comprising actuating a fast-acting fuel-additive supply valve to meter a variable amount of fuel additive into a fuel stream, thereby forming an additive-enhanced fuel with an additive concentration that can be dynamically adjusted as fast as each engine cycle; injecting the additive-enhanced fuel directly or indirectly into a combustion chamber or into an intake port; and combusting the additive-enhanced fuel. |
| Use: Method for controlling timing of combustion in internal combustion engine such as diesel engine and petrol spark-ignition engine. |
| Advantage: Significant pressure differential between additive supply and fuel-line is allowed to introduce the additive on engine-cycle timescales, and to minimize the effect of pressure variations in fuel line. The lag time is minimized when longer lengths are required. The combustion temperatures are reduced at lower boost conditions, and the need for hot residuals is eliminated. |
| Novelty: The method involves actuating a fast-acting fuel-additive supply valve (315) to meter an amount of fuel additive into a fuel stream conduit (320), to form an additive-enhanced fuel. The additive-enhanced fuel is supplied directly or indirectly into a combustion chamber, an intake port, or an intake manifold. The fuel additive is mixed with fuel in fuel stream conduit with a mixing system. The additive-enhanced fuel is combusted. The fuel-additive supply valve is actuated in a series of one or more pulses during each engine cycle to meter the amount of additive into fuel. |
| Filed: 9/16/2015 |
| Application Number: US14855809A |
| Tech ID: SD 13291.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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