US3834156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine turbocharging system with vented compressor bearing
Assignee: Wallace Murray Corp
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Filing: 1973-01-10
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Granted: 1974-09-10
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Expires: 1993-01-10
Abstract
Abstract Disclosed is a combination of a spark ignition internal combustion engine and an exhaust gas driven turbocharger whose compressor component delivers charge air to the air induction system of the engine downstream of the engine carburetor and air cleaner. A tube provides communication between the crankcase of the engine and the impeller shaft bearing housing of the turbocharger compressor component to thereby permit entry of crankcase gases into the bearing housing thereby eliminating the ingestion of bearing lubricating oil along the impeller shaft and through the impeller shaft bearing into the compressor discharge passage when a vacuum condition exits in the compressor component as for example under engine idle condition.
Inventors
- 👤 J Cutler
- 👤 R Edwards
- 👤 C Sarle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:19
CPC Classifications
F; F02; F02C; F02C6/00; F02C6/04; F02C6/10; F02C6/12; F02B; F02B39/00; F02B39/14; F02B1/00; F02B1/02; F02B1/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
177 words
In combination, an internal combustion engine of the spark ignition type having an engine fluid collection point and an airfuel vaporizing means under the control of a throttle valve for providing an air-fuel mixture to the air induction conduit for the engine, an air charging means for providing additional air to the engine and including a compressor having its discharge passage communicating with the air induction conduit of the engine and having its intake passage coupled to said air fuel vaproizing means, said compressor having an impeller disposed adjacent a collector area and having an impeller shaft which is supported on a bearing assembly within a bearing housing through which lubricating oil is circulated and a conduit connecting the engine fluid collection point with the interior of said bearing housing to permit entry of gases from said fluid collection point into said bearing housing thereby eliminating the ingestion of lubricating oil through said impeller shaft bearing assembly and into the compressor discharge passage when pressure in said air induction conduit decreases as said throttle valve is closed.
Claim 2
Dependent Claim
177 words
In combination, an internal combustion engine of the spark ignition type having an engine fluid collection point and an airfuel vaporizing means under the control of a throttle valve for providing an air-fuel mixture to the air induction conduit for the engine, an air charging means for providing additional air to the engine and including a compressor having its discharge passage communicating with the air induction conduit of the engine and having its intake passage coupled to said air fuel vaproizing means, said compressor having an impeller disposed adjacent a collector area and having an impeller shaft which is supported on a bearing assembly within a bearing housing through which lubricating oil is circulated and a conduit connecting the engine fluid collection point with the interior of said bearing housing to permit entry of gases from said fluid collection point into said bearing housing thereby eliminating the ingestion of lubricating oil through said impeller shaft bearing assembly and into the compressor discharge passage when pressure in said air induction conduit decreases as said throttle valve is closed.
Claim 3
Dependent Claim
41 words
A combination as claimed in claim 1 in which said air charging means takes the form of an exhaust gas driven turbocharger with said compressor impeller shaft being driven by a turbine through which exhaust gases from said engine are expanded.
Claim 4
Dependent Claim
19 words
A combination as claimed in claim 2 in which said air-fuel Vaporizing means takes the form of a carburetor.
Claim 5
Dependent Claim
46 words
A combination as claimed in claim 1 in which said bearing housing is provided with a gravity oil drain opening in its lower wall and the junction of said conduit with the interior of the bearing housing is a substantial distance above said oil drain opening.
Claim 6
Dependent Claim
19 words
A combination as claimed in claim 1 in which said engine fluid collection point is the engine crankcase chamber.
Claim 7
Dependent Claim
21 words
A combination as claimed in claim 1 in which said engine fluid collection point is upstream of the air-fuel vaporizing means.
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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |