US 4,543,929 A · Turbulence generating method and internal combustion engine for carrying out the same

Abstract

Disclosed are a turbulence generating method for an internal combustion engine and an internal combustion engine for carrying out that method. Main and auxiliary recesses communicating with each other are formed by at least two projections in the combustion chamber of a reciprocating internal combustion engine, which is defined by a piston, a cylinder head and a cylinder block. A swirling mechanism for swirling the intake air is disposed in an intake mechanism for supplying the intake air into the combustion chamber. A swirl of intake air is generated in the main recess by the swirling mechanism and is accelerated and introduced into the main recess as the piston rises. A turbulent layer is formed while the swirl is converted occasionally into turbulences by the projections. Secondary swirls other than the main swirl are generated in the auxiliary recesses. Turbulences are further generated between the swirl and the secondary swirls thereby to improve combustion efficiency.

Claims18

Dependent claims

A turbulence generating method for a reciprocating internal combustion engine in which there are provided a combustion chamber defined by a piston, a cylinder head and a cylinder block, main and auxiliary recesses provided in said combustion chamber, said main and auxiliary recesses being connected through at least two projected portions;

an intake swirling mechanism for supplying intake air into said combustion chamber, including a swirling mechanism for swirling intake air, comprising the steps of generating a swirl of intake air in said main recess by means of said swirling mechanism and accelerating said swirl in said main recess as said piston rises;
forming a turbulent layer while occasionally converting said swirl into turbulences by means of said projected portions;
generating secondary swirls in said auxiliary recesses different from said swirl and counter-rotating to said swirl;
and
further generating a layer of turbulences between said swirl and said secondary swirls for separating said swirl from said secondary swirls, to thereby improve the combustion efficiency of said engine.

2 more elements

A reciprocating internal combustion engine, comprising;

a combustion chamber defined by a piston, a cylinder head and a cylinder block;
and
an intake swirling mechanism for supplying intake air into said combustion chamber, and including a swirling mechanism for swirling the intake air,
said combustion chamber being formed with a main recess for introducing and accelerating the swirl of the intake air, which is generated by said swirling mechanism,
said main recess being formed with at least two projected portions for forming a turbulent layer while occasionally converting said swirl into a turbulence,
said main recess being formed with auxiliary recesses for accommodating secondary swirls different from and counter-rotating to said swirl and for further generating a layer of turbulences between said swirl and said secondary swirls for separating said swirl from said secondary swirl, to thereby improve the combustion efficiency of said internal combustion engine.

3 more elements

Dependencies are inferred from the claim text.

Turbulence generating method and internal combustion engine for carrying out the same

Life of this patent

Turbulence generating method and internal combustion engine for carrying out the same

Life of this patent

Abstract

Claims18