US5803027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supercharged internal combustion engine
Assignee: Delphi Technologies Inc
•
Filing: 1996-02-16
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Granted: 1998-09-08
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Expires: 2016-02-16
Abstract
Abstract A method of controlling the air supply to a scavenged internal combustion engine having a blower for suppling air thereto and bypass means for allowing a bypass air flow from the outlet side of the blower to the inlet side thereof, the method including regulating the bypass air flow through the bypass means to provide a variable rate of air flow therethrough and regulating the flow of ambient air to the blower to thereby control the pressure of the intake air supply to the blower and controlling a supply of recirculated exhaust gas introduced upstream of the blower by controlling the flow rate of ambient air to the blower such that a requisite pressure is generated upstream of the blower to thereby control the exhaust gas flow rate.
Inventors
- 👤 Gregory Bruce Bell
- 👤 Stephen Reinhard Malss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:43
CPC Classifications
F; F02; F02D; F02D23/00; F02D23/02; F02D21/00; F02D21/06; F02D21/08; F02B; F02B33/00; F02B33/32; F02B33/34; F02B33/36; F02B33/40; F02B37/00; F02B37/12; F02B37/16; F02D9/00; F02D9/02; F02M; F02M26/00; F02M26/52; F02M26/59; F02M26/60; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02B75/12; F02B2075/125; F02B2275/00; F02B2275/14; F02B3/00; F02B3/06; F02D2400/00; F02D2400/04; F02D41/00; F02D41/0025; F02D41/0047; F02D41/0065; F02M26/02; F02M26/03; F02M26/45; F02M26/46; F02M26/47; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
128 words
A method of controlling the air supply to a scavenged internal combustion engine having a blower for supplying air thereto and bypass means for allowing a bypass air flow from the outlet side of the blower to the inlet side thereof, the method including regulating the bypass air flow through the bypass means to provide a variable rate of air flow therethrough and regulating the flow of ambient air to the blower to thereby control the pressure of the intake air supply to the blower and controlling a supply of recirculated exhaust gas introduced upstream of the blower by controlling the flow rate of ambient air to the blower such that a requisite pressure is generated upstream of the blower to thereby control the exhaust gas flow rate.
Claim 2
Independent Claim
128 words
A method of controlling the air supply to a scavenged internal combustion engine having a blower for supplying air thereto and bypass means for allowing a bypass air flow from the outlet side of the blower to the inlet side thereof, the method including regulating the bypass air flow through the bypass means to provide a variable rate of air flow therethrough and regulating the flow of ambient air to the blower to thereby control the pressure of the intake air supply to the blower and controlling a supply of recirculated exhaust gas introduced upstream of the blower by controlling the flow rate of ambient air to the blower such that a requisite pressure is generated upstream of the blower to thereby control the exhaust gas flow rate.
Claim 3
Dependent Claim
28 words
A method according to claim 1 wherein the air supply to the engine is controlled at least when the engine is operating at idle and/or at low loads.
Claim 4
Dependent Claim
27 words
A method according to claim 1 wherein the flow of ambient air to the blower is regulated to provide a variable rate of ambient air flow thereto.
Claim 5
Dependent Claim
24 words
A method according to claim 1 wherein the bypass air flow rate and the ambient air flow rate to the blower are independently controlled.
Claim 6
Dependent Claim
26 words
A method according to claim 1 wherein the pressure of the intake air supply to the blower is controlled as a function of engine operating conditions.
Claim 7
Dependent Claim
37 words
A method according to claim 1 including bypassing a greater proportion of air supplied by the blower when the engine is operating at idle or at low loads than when the engine is operating at higher loads.
Claim 8
Dependent Claim
23 words
A method according to claim 1 including providing different exhaust gas flow rates while maintaining the overall air flow rate to the blower.
Claim 9
Dependent Claim
26 words
A method according to claim 1 including controlling the bypass air flow rate and the ambient air flow rate as a function of engine operating conditions.
Claim 10
Dependent Claim
25 words
A method according to claim 8 including primarily controlling the bypass air flow rate as a function of the ambient air flow to the engine.
Claim 11
Dependent Claim
24 words
A method according to claim 8 including controlling the ambient air flow rate as a function of an operator load demand on the engine.
Claim 12
Dependent Claim
21 words
A method according to claim 1 including maintaining at least a minimum ambient air flow to the blower during engine operation.
Claim 13
Dependent Claim
32 words
A method according to claim 11 wherein the minimum ambient air flow is the minimum required to generate a requisite pressure upstream of the blower to thereby enable exhaust gas recirculation thereto.
Claim 14
Independent Claim
133 words
A method of controlling the air supply to a scavenged internal combustion engine having a blower for supplying air thereto and bypass means for allowing a bypass air flow from the outlet side of the blower to the inlet side thereof, the method including regulating the bypass air flow through the bypass means to provide a variable rate of air flow therethrough and regulating the flow of ambient air to the blower to thereby control the pressure of the intake air supply to the blower, and controlling the supply of recirculated exhaust gas upstream of the blower by controlling the bypass air flow rate and the flow rate of ambient air to the blower such that a requisite pressure is generated upstream of the blower to thereby control the exhaust gas flow rate.
Claim 15
Independent Claim
133 words
A method of controlling the air supply to a scavenged internal combustion engine having a blower for supplying air thereto and bypass means for allowing a bypass air flow from the outlet side of the blower to the inlet side thereof, the method including regulating the bypass air flow through the bypass means to provide a variable rate of air flow therethrough and regulating the flow of ambient air to the blower to thereby control the pressure of the intake air supply to the blower, and controlling the supply of recirculated exhaust gas upstream of the blower by controlling the bypass air flow rate and the flow rate of ambient air to the blower such that a requisite pressure is generated upstream of the blower to thereby control the exhaust gas flow rate.
Claim 16
Dependent Claim
141 words
A blower scavenging arrangement for an internal combustion engine including a blower for supplying air to the engine, a bypass air control means for regulating a bypass air flow from the outlet side of the blower to the inlet side thereof to thereby provide a variable rate of bypass air flow, an ambient air control means for regulating the flow rate of ambient air to the blower, and exhaust gas recirculation means for recirculating exhaust gas to the engine, the exhaust gas being returned upstream of the blower, wherein said regulation by said bypass air control means and said ambient air control means thereby controls the pressure of the intake air supply to the blower and the rate of exhaust gas recirculation is regulated by controlling the bypass air flow rate and the flow rate of ambient air to the blower.
Claim 17
Dependent Claim
141 words
A blower scavenging arrangement for an internal combustion engine including a blower for supplying air to the engine, a bypass air control means for regulating a bypass air flow from the outlet side of the blower to the inlet side thereof to thereby provide a variable rate of bypass air flow, an ambient air control means for regulating the flow rate of ambient air to the blower, and exhaust gas recirculation means for recirculating exhaust gas to the engine, the exhaust gas being returned upstream of the blower, wherein said regulation by said bypass air control means and said ambient air control means thereby controls the pressure of the intake air supply to the blower and the rate of exhaust gas recirculation is regulated by controlling the bypass air flow rate and the flow rate of ambient air to the blower.
Claim 18
Dependent Claim
21 words
An arrangement according to claim 14 wherein the bypass air control means and the ambient air control means are independently controlled.
Claim 19
Dependent Claim
23 words
An arrangement according to claim 14 wherein the bypass air control means provides the primary control of the air supply to the engine.
Claim 20
Dependent Claim
31 words
An arrangement according to claim 14 wherein the ambient air control means primarily serves to create a flow restriction upstream of the blower during idle and/or low load engine operating conditions.
Claim 21
Dependent Claim
38 words
An arrangement according to claim 14 wherein the bypass air control means and the ambient air control means are interactive to control the pressure of the intake air supply to the blower in response to engine operating conditions.
Claim 22
Dependent Claim
29 words
An arrangement according to claim 14 wherein the bypass air control means includes a bypass duct and a bypass valve for providing the variable rate of bypass air therethrough.
Claim 23
Dependent Claim
25 words
An arrangement according to claim 19 wherein the bypass valve is controlled by an electronic control unit as a function of the engine operating conditions.
Claim 24
Dependent Claim
37 words
An arrangement according to claim 20 including an air flow meter for measuring the ambient air flow rate to the engine wherein the bypass valve is primarily controlled on the basis of the ambient air flow rate.
Claim 25
Dependent Claim
27 words
An arrangement according to claim 14 wherein the ambient air control means includes an ambient air valve for regulating the rate of ambient air to the blower.
Claim 26
Dependent Claim
26 words
An arrangement according to claim 22 wherein the ambient air valve is able to provide for a variable rate of ambient air flow to the blower.
Claim 27
Dependent Claim
24 words
An arrangement according to claim 22 wherein the ambient air valve is controlled as a function of an operator load demand on the engine.
Claim 28
Dependent Claim
28 words
An arrangement according to claim 22 wherein the ambient air valve is controlled by an electronic control unit as a function of a vehicle throttle or pedal position.
Claim 29
Dependent Claim
22 words
An arrangement according to claim 22 wherein the ambient air valve is of the butterfly type and includes orifices or slits therethrough.
Claim 30
Dependent Claim
32 words
An arrangement according to claim 22 wherein the ambient air valve is arranged to allow for a minimum flow of ambient air to the blower even when in the fully closed position.
Claim 31
Dependent Claim
17 words
An arrangement according to claim 14 wherein the engine is a direct injected two stroke cycle engine.
Claim 32
Dependent Claim
16 words
An arrangement according to claim 14 wherein the engine is a spark ignited internal combustion engine.
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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) | 2001-09-07 | 2002-03-09 | 2002-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-09-07 | 2006-03-09 | 2006-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-09-07 | 2010-03-09 | 2010-09-08 | $7700.00 | Window Closed / Lapsed |