US5007394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion chamber for compression ignition internal combustion engine
Assignee: AVIA koncern
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Filing: 1990-05-10
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Granted: 1991-04-16
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Expires: 2010-05-10
Abstract
Abstract A combustion chamber, designed for compression ignition internal combustion engines, solves the problem of distribution and whirling of fuel mixture in the combustion chamber of the engine and from this the resulting easier ignition of fuel mixture, optimum increase in the combustion pressures with optimum layout of the valve gear and the intake and exhaust channels in a simplified design of the cylinder head enabled by the larger eccentricity of the injection jet. A rotary combustion chamber is formed in the piston head, the bottom of the chamber formed by a rotary peripheral surface and rotary internal surface with a circular barrier. Ratios between the depth of the rotary peripheral surface and the depth of the top of the barrier, the largest diameter of the rotary internal surface and the largest diameter of the rotary peripheral surface, and the depth of both rotary surfaces are defined in specific ranges.
Inventors
- 👤 Jaroslav Brychta
- 👤 Eduard Lutisan
- 👤 Vladimir Jirkovsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:44
CPC Classifications
F; F02; F02B; F02B23/00; F02B23/02; F02B23/06; F02B23/0645; F02B23/0654; F02B23/0657; F02B23/0669; F02B23/0672; F02B23/0678; F02B23/0687; F02F; F02F3/00; F02F3/26; F02B2275/00; F02B2275/14; F02B3/00; F02B3/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
198 words
A combustion chamber for a compression ignition internal combustion engine with multiport jet direct fuel injection, said chamber comprising a hollow cavity formed in a piston head wherein said cavity is defined by a rotary side wall surface and a shaped bottom; said shaped bottom of the combustion chamber in the piston head having a peripheral rotary surface and an internal rotary surface; said peripheral rotary surface being separated from said internal rotary surface by a barrier of circular plan; said barrier having a top, said piston head having a planar surface, said rotary surfaces each having diameters, distances from said planar surfaces being referred to as depths, the following ratios being adhered to: the ratio between the depth of the top of the barrier and the maximum depth of the peripheral rotary surface being in the range from 0.4 to 0.7; the ratio between the maximum diameter of the internal rotary surface and the maximum diameter of the peripheral rotary surface being in the range from 0.25 to 0.45; and the ratio between the maximum depth of the internal rotary surface and the maximum depth of the peripheral rotary surface being in the range 0.85 to 1.15.
Claim 2
Dependent Claim
198 words
A combustion chamber for a compression ignition internal combustion engine with multiport jet direct fuel injection, said chamber comprising a hollow cavity formed in a piston head wherein said cavity is defined by a rotary side wall surface and a shaped bottom; said shaped bottom of the combustion chamber in the piston head having a peripheral rotary surface and an internal rotary surface; said peripheral rotary surface being separated from said internal rotary surface by a barrier of circular plan; said barrier having a top, said piston head having a planar surface, said rotary surfaces each having diameters, distances from said planar surfaces being referred to as depths, the following ratios being adhered to: the ratio between the depth of the top of the barrier and the maximum depth of the peripheral rotary surface being in the range from 0.4 to 0.7; the ratio between the maximum diameter of the internal rotary surface and the maximum diameter of the peripheral rotary surface being in the range from 0.25 to 0.45; and the ratio between the maximum depth of the internal rotary surface and the maximum depth of the peripheral rotary surface being in the range 0.85 to 1.15.
Claim 3
Dependent Claim
44 words
The combustion chamber as claimed in claim 1, wherein the volume defined by the internal rotary surface and the plane in which the top of the barrier lies forms 2 to 10% of the entire volume of the combustion chamber in the piston head.
Claim 4
Dependent Claim
52 words
The combustion chamber as claimed in claim 1, wherein the peripheral rotary surface of the bottom of the combustion chamber is shaped as a semi-toroid formed by the rotation of a hemispherical arc around the combustion chamber axis and the internal rotary surface of the bottom of the combustion chamber is hemispherical.
Claim 5
Dependent Claim
60 words
The combustion chamber as claimed in claim 1, wherein the peripheral rotary surface of the bottom of the combustion chamber is smoothly followed by the rotary side wall surface of the combustion chamber and wherein a straight line along said side wall and the combustion chamber axis form an angle of 0° to 20° with a vertex above the piston.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-04-15 | 1994-10-15 | 1995-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-15 | 1998-10-15 | 1999-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-15 | 2002-10-15 | 2003-04-16 | $7700.00 | Window Closed / Lapsed |