Improvements to Combustion Engines

Abstract

The present invention provides methods for improving the efficiency of combustion engines. The method includes measuring the amount of primary fuel supplied to the combustion engine. An operating state of the combustion engine is determined. A fuel mapping profile is selected based on the operating state of the combustion engine and an amount of secondary fuel to be injected as a fraction of a measured amount of primary fuel is determined from the fuel mapping profile.

Description

technical field [0001] The present invention relates to improvements in combustion engines and to combustion engines, particularly, but not exclusively, to improvements in the combustion efficiency of internal combustion engines. Background technique [0002] Engine operation using more than one fuel is known. Many of these systems attempt to reduce overall fuel costs by using less expensive secondary fuels instead of relatively more expensive primary fuels. This type of system can be retrofitted to existing engines or supplied as an integral part of the engine / vehicle by the manufacturer. There is a wide variety of systems produced for the automotive market, especially the light and heavy truck markets, where fuel costs constitute a significant cost to the operator. [0003] There are generally two types of systems that are typically used. [0004] The first type of system works by introducing a secondary fuel in addition to the primary fuel. The amount of primary fuel ...

AI Technical Summary

Problems solved by technology

[0011] Therefore, existing dual fuel systems have limitations such as requiring a minimum fraction of about 25% secondary fuel and / or requiring the ECU or primary fuel supply to be controlled or adaptable

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