US 2002/0162544 A1 · Exhaust gas assisted fuel injection system for internal combustion engine

Abstract

The present invention relates to a fuel injecting apparatus for an internal combustion engine, in which exhaust gas is applied to the injection of fuel. According to the fuel injecting apparatus, a portion of hot exhaust gas is introduced in front of the outlet of the fuel injector allowing hot exhaust gas to promote the fine particle formation and vaporization of fuel thereby enhancing efficiency of fuel. Again, a portion of exhaust gas can be circulated into the combustion chamber to restrict the production of nitrogen oxide. Also, exhaust gas re-introduced into the combustion chamber through the EGR line is cooled by heat of vaporization of fuel injected from the fuel injector thereby advantageously relieving the installation of an additional cooling system for cooling exhaust gas which is re-circulated into the combustion chamber.

Claims6

Dependent claims

An exhaust gas assisted fuel injection apparatus for an internal combustion engine, comprising:

a fuel injector installed in a suction port for supplying fuel to a combustion chamber of the engine;
an EGR line installed between one side of an exhaust manifold of the engine and said fuel injector so that a portion of exhaust gas released from the engine surrounds fuel injected from said fuel injector thereby promoting the fine particle formation and vaporization of injected fuel;
an exhaust gas injection apparatus or EGR valve installed in one side of said EGR line for regulating exhaust gas within said EGR line;
and
a control unit for opening/shutting said exhaust gas injection apparatus or EGR valve according to operating conditions of the engine.

2 more elements

An exhaust gas assisted fuel injection apparatus for an internal combustion engine, comprising:

a fuel injector installed in one side of a combustion chamber of the engine for injecting fuel into the combustion chamber of the engine;
an EGR line installed between one side of an exhaust manifold of the engine and said fuel injector so that a portion of exhaust gas from the engine can surround fuel, said fuel being injected from said fuel injector, to promote fine particle formation or vaporization of injected fuel;
an exhaust gas injection apparatus or EGR valve installed in one side of said EGR line for regulating exhaust gas;
and
a control unit for opening/shutting the EGR valve according to operating conditions of the engine.

2 more elements

Dependencies are inferred from the claim text.

Exhaust gas assisted fuel injection system for internal combustion engine

Life of this patent

Exhaust gas assisted fuel injection system for internal combustion engine

Life of this patent

Abstract

Claims6