US5771695A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for overcoming turbo lag
Assignee: 482047 BC Ltd
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Filing: 1993-02-24
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Granted: 1998-06-30
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Expires: 2013-02-24
Abstract
Abstract A method and apparatus for improving the time response of a turbo-compressor assisted internal combustion engine wherein the turbo-compressor is driven by an electric motor at a speed somewhat less than its full-load operating speed until such time as the turbo-compressor is driven at a higher speed by an exhaust gas turbine. The electric motor is provided to maintain the minimum rotational speed of the turbo-compressor when the engine load is low so that the turbo-compressor is ready for prompt response when driven by increasing exhaust gas as a result of additional load demand on the internal combustion engine.
Inventors
- 👤 Edward M. Halimi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:16
CPC Classifications
F; F02; F02B; F02B37/00; F02B37/04; F02B37/10; F02B37/11; F02B37/12; F02B37/14; F02B39/00; F02B39/02; F02B39/08; F02B39/10; F02B39/12; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
194 words
A drive system comprising: a rotary compressor for delivering compressed air to the inlet of an internal combustion engine, said rotary compressor having a compressor shaft, said rotary compressor having an inlet duct; an exhaust gas turbine having an impeller permanently connected to said rotary compressor shaft, said exhaust gas turbine being connected to the engine for receiving exhaust gas from the engine for driving said rotary compressor; an electric motor in said inlet duct to said rotary compressor, said electric motor having a rotatable shaft therein, said shaft being in axial alignment with said rotary compressor shaft; and a one-way clutch permanently connecting said electric motor to said rotary compressor shaft, said one-way clutch being positioned so that said electric motor drives said rotary compressor at a speed above idle speed until said exhaust gas turbine drives said rotary compressor at a rotative speed higher than the rotative speed of said electric motor so that said rotary compressor always rotates at a speed at least that of the electric motor so that when the internal combustion engine produces more exhaust gas in response to a power demand, said rotary compressor is already running.
Claim 2
Dependent Claim
194 words
A drive system comprising: a rotary compressor for delivering compressed air to the inlet of an internal combustion engine, said rotary compressor having a compressor shaft, said rotary compressor having an inlet duct; an exhaust gas turbine having an impeller permanently connected to said rotary compressor shaft, said exhaust gas turbine being connected to the engine for receiving exhaust gas from the engine for driving said rotary compressor; an electric motor in said inlet duct to said rotary compressor, said electric motor having a rotatable shaft therein, said shaft being in axial alignment with said rotary compressor shaft; and a one-way clutch permanently connecting said electric motor to said rotary compressor shaft, said one-way clutch being positioned so that said electric motor drives said rotary compressor at a speed above idle speed until said exhaust gas turbine drives said rotary compressor at a rotative speed higher than the rotative speed of said electric motor so that said rotary compressor always rotates at a speed at least that of the electric motor so that when the internal combustion engine produces more exhaust gas in response to a power demand, said rotary compressor is already running.
Claim 3
Dependent Claim
32 words
The drive system of claim 1 wherein said electric motor is in a housing and said housing has ventilation passages therein so that air in said inlet duct cools said electric motor.
Claim 4
Dependent Claim
28 words
The drive system of claim 2 wherein said inlet duct around said motor is sufficiently large to permit adequate air flow through said duct around said electric motor.
Claim 5
Dependent Claim
36 words
The drive system of claim 3 wherein the air flow area in said duct around said electric motor is at least as large as the air flow area in said duct away from said electric motor.
Claim 6
Dependent Claim
21 words
The drive system of claim 4 wherein said motor housing is streamlined to minimize air flow restriction through said inlet duct.
Claim 7
Dependent Claim
222 words
A drive system for an internal combustion engine having cylinders and a turbocharger comprising: a rotary compressor, an air inlet duct on said rotary compressor, an outlet duct on said rotary compressor for connection to an inlet to the cylinders; an exhaust gas turbine having an inlet duct for connection to an exhaust gas outlet of the internal combustion engine, said exhaust gas turbine having an outlet duct for discharge of exhaust gas; a shaft permanently connected to both said rotary compressor and said exhaust gas turbine so that said rotary compressor and said exhaust gas turbine run at the same speed, said shaft defining an axis; an electric motor lying on said axis, said electric motor having a motor shaft, a one-way clutch, said one-way clutch being connected to said motor shaft and to said shaft so that said electric motor can drive said rotary compressor in an air-compressing direction, said motor lying in said air inlet duct to said rotary compressor so that when said electric motor is energized, said rotary compressor has a minimum rotative speed equal to the rotative speed of said electric motor and said rotary compressor can run faster than said electric motor when driven faster by said exhaust gas turbine so that said rotary compressor is always driven at a least said minimum rotative speed.
Claim 8
Dependent Claim
222 words
A drive system for an internal combustion engine having cylinders and a turbocharger comprising: a rotary compressor, an air inlet duct on said rotary compressor, an outlet duct on said rotary compressor for connection to an inlet to the cylinders; an exhaust gas turbine having an inlet duct for connection to an exhaust gas outlet of the internal combustion engine, said exhaust gas turbine having an outlet duct for discharge of exhaust gas; a shaft permanently connected to both said rotary compressor and said exhaust gas turbine so that said rotary compressor and said exhaust gas turbine run at the same speed, said shaft defining an axis; an electric motor lying on said axis, said electric motor having a motor shaft, a one-way clutch, said one-way clutch being connected to said motor shaft and to said shaft so that said electric motor can drive said rotary compressor in an air-compressing direction, said motor lying in said air inlet duct to said rotary compressor so that when said electric motor is energized, said rotary compressor has a minimum rotative speed equal to the rotative speed of said electric motor and said rotary compressor can run faster than said electric motor when driven faster by said exhaust gas turbine so that said rotary compressor is always driven at a least said minimum rotative speed.
Claim 9
Dependent Claim
32 words
The drive system of claim 6 wherein said inlet duct is larger around said electric motor than at the inlet to said turbo-compressor to maintain adequate air flow area to said turbo-compressor.
Claim 10
Dependent Claim
25 words
The drive system of claim 7 wherein said motor is mounted in a housing and said housing is mounted on fins within said inlet duct.
Claim 11
Dependent Claim
33 words
The drive system of claim 8 wherein said motor housing is streamlined and has vent openings therein to minimize pressure drop around said motor housing and to provide air ventilation to said motor.
Claim 12
Independent Claim
221 words
The method of maintaining a turbocharger ready for prompt response comprising the steps of: providing a rotary compressor for connection to an internal combustion engine for drawing air into an inlet and for the delivery of air to the engine; providing an exhaust gas turbine for connection to an exhaust of the internal combustion engine so that the exhaust gas turbine is rotationally driven by exhaust gas from the internal combustion engine; providing a coupling between the exhaust gas turbine and the rotary compressor so that the rotary compressor always operates at the same speed as the exhaust gas turbine; providing an electric motor and a one-way coupling connected to the rotary compressor so that the electric motor always drives the rotary compressor at least a minimum rotative speed and the exhaust gas turbine can drive the rotary compressor higher than the minimum speed without driving the electric motor higher than the minimum speed; and positioning the electric motor in axial alignment with the rotary compressor and exhaust gas turbine and positioning the electric motor within the air inlet to the rotary compressor so that the electric motor is cooled by inlet air to the rotary compressor so that the rotary compressor is always operating at a speed at least ready to supply rotary compressed air to the internal combustion engine.
Claim 13
Independent Claim
221 words
The method of maintaining a turbocharger ready for prompt response comprising the steps of: providing a rotary compressor for connection to an internal combustion engine for drawing air into an inlet and for the delivery of air to the engine; providing an exhaust gas turbine for connection to an exhaust of the internal combustion engine so that the exhaust gas turbine is rotationally driven by exhaust gas from the internal combustion engine; providing a coupling between the exhaust gas turbine and the rotary compressor so that the rotary compressor always operates at the same speed as the exhaust gas turbine; providing an electric motor and a one-way coupling connected to the rotary compressor so that the electric motor always drives the rotary compressor at least a minimum rotative speed and the exhaust gas turbine can drive the rotary compressor higher than the minimum speed without driving the electric motor higher than the minimum speed; and positioning the electric motor in axial alignment with the rotary compressor and exhaust gas turbine and positioning the electric motor within the air inlet to the rotary compressor so that the electric motor is cooled by inlet air to the rotary compressor so that the rotary compressor is always operating at a speed at least ready to supply rotary compressed air to the internal combustion engine.
Claim 14
Dependent Claim
29 words
The method of claim 10 further including providing an air inlet duct around the motor so that air to the turbo-compressor is not impeded but cools the electric motor.
Claim 15
Dependent Claim
183 words
A drive system for an internal combustion engine having cylinders and a turbocharger comprising: a rotary compressor, an air inlet duct on said rotary compressor, an outlet duct on said rotary compressor for connection to an inlet to the cylinders; an exhaust gas turbine having an inlet duct for connection to an exhaust gas outlet of the internal combustion engine, said exhaust gas turbine having an outlet duct for discharge of exhaust gas; a shaft permanently connected to both said rotary compressor and said exhaust gas turbine so that said rotary compressor and said exhaust gas turbine run at the same speed, said shaft defining an axis; an electric motor lying on said axis, said electric motor having a motor shaft, said electric motor shaft lying on the same axis as said shaft connected to said rotary compressor and said exhaust gas turbine, a clutch connected to both said motor shaft and to said shaft connected to said rotary compressor and to said exhaust gas turbine so that when said clutch is actuated, said electric motor is connected to drive said rotary compressor.
Claim 16
Dependent Claim
183 words
A drive system for an internal combustion engine having cylinders and a turbocharger comprising: a rotary compressor, an air inlet duct on said rotary compressor, an outlet duct on said rotary compressor for connection to an inlet to the cylinders; an exhaust gas turbine having an inlet duct for connection to an exhaust gas outlet of the internal combustion engine, said exhaust gas turbine having an outlet duct for discharge of exhaust gas; a shaft permanently connected to both said rotary compressor and said exhaust gas turbine so that said rotary compressor and said exhaust gas turbine run at the same speed, said shaft defining an axis; an electric motor lying on said axis, said electric motor having a motor shaft, said electric motor shaft lying on the same axis as said shaft connected to said rotary compressor and said exhaust gas turbine, a clutch connected to both said motor shaft and to said shaft connected to said rotary compressor and to said exhaust gas turbine so that when said clutch is actuated, said electric motor is connected to drive said rotary compressor.
Claim 17
Dependent Claim
31 words
The drive system of claim 12 wherein said electric motor lies within said air inlet duct on said rotary compressor so that air to said rotary compressor cools said electric motor.
Claim 18
Dependent Claim
37 words
The drive system of claim 12 wherein said clutch is an electric clutch the energization of which can be controlled to couple and decouple said electric motor shaft from said rotary compressor and exhaust gas turbine shaft.
Claim 19
Dependent Claim
31 words
The drive system of claim 14 wherein said electric motor lies within said air inlet duct on said rotary compressor so that air to said rotary compressor cools said electric motor.
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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) | 2001-06-29 | 2001-12-29 | 2002-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-29 | 2005-12-29 | 2006-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-29 | 2009-12-29 | 2010-06-30 | $7700.00 | Window Closed / Lapsed |