System for Variable Blending Of Ethanol And Exhaust Water For Use As An Anti-Knock Agent
First Claim
1. A system for providing a water-ethanol mixture for introduction into a spark ignition engine where the water in said mixture is removed from the engine exhaust and employed to extract ethanol from a gasoline-ethanol mixture contained in a fuel tank, and wherein the resulting ethanol-water mixture is introduced into said engine.
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Abstract
The present application describes systems for water retrieval from the engine exhaust. This collected water can be used both for removing ethanol from ethanol-gasoline blends, and for use as a knock suppressant. The water that is removed from the exhaust can be used as the only source of water or in combination with water that is externally supplied. The present application also describes new means for removal of water from the exhaust that can be employed for applications. In some embodiments, an auto-heat exchanger is employed to recover water from the engine exhaust.
67 Citations
43 Claims
- 1. A system for providing a water-ethanol mixture for introduction into a spark ignition engine where the water in said mixture is removed from the engine exhaust and employed to extract ethanol from a gasoline-ethanol mixture contained in a fuel tank, and wherein the resulting ethanol-water mixture is introduced into said engine.
- 11. An engine system where water that is extracted from engine exhaust is directly injected into said engine and where the amount of water that is employed is sufficiently high so as to prevent knock while being low enough to prevent misfire.
- 21. An engine system where water is extracted from the engine exhaust and is stored in a first fluid tank and where ethanol or an ethanol water mixture from a second conditioning tank is added to the fluid in the first fluid tank and where the fluid in the first fluid tank is introduced into said engine.
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33. An engine system where water is extracted from the exhaust using a moving auto heat exchanger.
- 34. A engine system, where a first tank provides water or a mixture of water and a second fluid for direct injection into said engine and where a second tank is filled with said second fluid and where said first and second tank are connected in such a way that said second fluid in said second tank can be added to said first tank to provide varying mixtures of water from said first tank and said second fluid from said second tank.
Specification