US 9,957,947 B2 · Method for introducing microwave energy into a combustion chamber of a combustion engine and combustion engine

Abstract

A method for introducing microwave energy into a combustion chamber of a reciprocating internal combustion engine with at least one cylinder with a cylinder head in which the microwaves reach the combustion chamber through a microwave window, wherein the microwaves are run about a circumference of the combustion chamber and radially injected into the combustion chamber through at least a portion of a combustion chamber wall functioning as a microwave window. The method and the internal combustion engine facilitate a precise control of a beginning of a space ignition of a fuel air mix in the combustion chamber so that an optimum low emission combustion of a fuel is achieved with an efficiency that is higher compared to conventional reciprocating piston combustion engines. In general the invention provides safe ignition of lean fuel air mixtures.

Claims9

Dependent claims

A method for injecting microwave energy into a combustion chamber of a reciprocating internal combustion engine with at least one cylinder with a cylinder head, comprising the steps:

running microwaves though at least one annular hollow conductor cavity arranged at a circumference of a combustion chamber;
and
radially injecting the microwaves into the combustion chamber through at least a portion of a combustion chamber wall functioning as a microwave window,
wherein the combustion chamber wall separates the combustion chamber from the at least on annular hollow conductor cavity and is made from a solid temperature stable material which is permeable for the microwaves,
wherein the at least one annular hollow conductor cavity includes at least one opening oriented towards the combustion chamber, and
wherein the at least one annular hollow conductor cavity is integrated into an engine block of the reciprocating internal combustion engine.

3 more elements

An internal combustion engine, comprising:

at least one cylinder with a cylinder head and a piston in which microwaves are injected through a microwave window into a combustion chamber,
wherein the combustion chamber includes a combustion chamber wall which functions as a microwave window at least in portions, and
wherein the combustion chamber wall is enveloped by at least one circumferential annular hollow conductor cavity with at least one feed for the microwave and at least one outlet opening for the microwave which outlet opening is oriented towards the combustion chamber wall,
wherein the combustion chamber wall separates the combustion chamber from the at least on annular hollow conductor cavity and is made from a solid temperature stable material which is permeable for the microwaves, and
wherein the at least one annular hollow conductor cavity is integrated into an engine block of the reciprocating internal combustion engine.

2 more elements

Dependencies are inferred from the claim text.

Method for introducing microwave energy into a combustion chamber of a combustion engine and combustion engine

Life of this patent

Method for introducing microwave energy into a combustion chamber of a combustion engine and combustion engine

Life of this patent

Abstract

Claims9