US4664607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary engine cooling system with flow balancing
Assignee: Rotary Power International Inc
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Filing: 1985-05-30
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Granted: 1987-05-12
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Expires: 2005-05-30
Abstract
Abstract A rotary engine has a substantially trochoidal-shaped housing cavity in which a rotor planetates. A cooling system for the engine directs coolant along a single series path consisting of series-connected groups of passages. Some coolant passages in the top-dead-center region are restricted to equalize cooling among various portions of the top-dead-center region.
Inventors
- 👤 Charles Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:24
CPC Classifications
F; F02; F02B; F02B55/00; F02B55/08; F02B55/10; F01; F01C; F01C21/00; F01C21/06; F02B53/00; F02B2053/005; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
94 words
A rotary internal combustion engine having a trochoid rotor housing section and having a group of cooling passages extending through a top-dead-center (TDC) region, characterized by: at least one passage of the group following a curved path which extends through a first hotter portion of the TDC region, by at least one further passage of the group following a substantially uncurved path through a second cooler portion of the TDC region, and by a fluid restriction for restricting fluid flow through the at least one further passage to balance coolant flow between the passages.
Claim 2
Dependent Claim
94 words
A rotary internal combustion engine having a trochoid rotor housing section and having a group of cooling passages extending through a top-dead-center (TDC) region, characterized by: at least one passage of the group following a curved path which extends through a first hotter portion of the TDC region, by at least one further passage of the group following a substantially uncurved path through a second cooler portion of the TDC region, and by a fluid restriction for restricting fluid flow through the at least one further passage to balance coolant flow between the passages.
Claim 3
Dependent Claim
56 words
The invention of claim 1, wherein: the engine is a stratified charge engine and the TDC region includes a spark plug receiving bore intersecting a pilot injector bore, the bore defining a V-crotch housing portion spaced apart from an inner rotor surface of rotor housing section, the at least one passage passing through the V-crotch portion.
Claim 4
Dependent Claim
61 words
The invention of claim 2, wherein: the engine comprises an end housing section and a set of passages extending through at least a portion of the end housing section, each passage of the set registering with a corresponding passage of the group, the restriction being formed in a passage of the set which registers with the at least one further passage.
Claim 5
Dependent Claim
158 words
In a stratified charge rotary internal combustion engine having a trochoid rotor housing section and an end housing section and having a series cooling circuit including a first group of cooling passages extending through a top-dead-center (TDC) region of the rotor housing section, and including a second group of passages extending through at least a portion of the end housing sections, each passage of the second group registering with a corresponding passage of the first group, characterized by: at least one passage of the first group presenting a lesser restriction to fluid flow than that which is presented by at least one further passage of the first group and characterized by at least one passage of the second group including a restriction therein, said at least one passage of the second group registering with the at least one passage of the first group, said restriction operating to balance fluid flow rates between the passages of the first group.
Claim 6
Dependent Claim
158 words
In a stratified charge rotary internal combustion engine having a trochoid rotor housing section and an end housing section and having a series cooling circuit including a first group of cooling passages extending through a top-dead-center (TDC) region of the rotor housing section, and including a second group of passages extending through at least a portion of the end housing sections, each passage of the second group registering with a corresponding passage of the first group, characterized by: at least one passage of the first group presenting a lesser restriction to fluid flow than that which is presented by at least one further passage of the first group and characterized by at least one passage of the second group including a restriction therein, said at least one passage of the second group registering with the at least one passage of the first group, said restriction operating to balance fluid flow rates between the passages of the first group.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-11 | 1990-11-10 | 1991-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-11 | 1994-11-10 | 1995-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-11 | 1998-11-10 | 1999-05-12 | $7700.00 | Window Closed / Lapsed |