US4593525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for operating a piston driven internal combustion engine having an exhaust gas turbocharger
Assignee: Dr Ing HCF Porsche AG
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Filing: 1985-07-19
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Granted: 1986-06-10
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Expires: 2005-07-19
Abstract
Abstract An apparatus and method for operating a piston driven internal combustion engine having an exhaust gas turbocharger, provides for the exhaust gases of the cylinders to be conducted to an afterburner chamber and subsequently to the exhaust gas turbine of the turbocharger when the motor vehicle is coasting, i.e., when the motor vehicle and engine are being driven by the vehicle's inertia, with the ignition for the cylinders being turned off and the charging air being introduced into the afterburner chamber. The noncombusted fuel/air mixture from the cylinders is combusted in the afterburner chamber with the additional charging air to thereby bring the turbocharger to its full output for reacceleration of the engine.
Inventors
- 👤 Hans Mezger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:23
CPC Classifications
F; F02; F02B; F02B37/00; F02B37/12; F02B37/18; F02B37/183; F02B37/16; F02B37/164; F02B37/166; F02D; F02D23/00; F02B1/00; F02B1/02; F02B1/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
188 words
A method of operating a piston-driven internal combustion engine of a motor vehicle having an exhaust gas turbocharger, in which exhaust gases from cylinders of the engine are conducted to an afterburner chamber and subsequently to an exhaust gas turbine of the turbocharger and in which air under admixture of fuel is blown into the cylinders of the engine by a charging compressor driven by the exhaust gas turbine by way of a throttling arrangement, comprising the steps of substantially inhibiting the engine combustion process when the engine is being driven by the inertia of the motor vehicle, conducting noncombusted fuel-air admixture from the cylinders into the afterburner chamber, branching off the charging air from a line from the charging compressor to the cylinders of the internal combustion engine and conducting the charging air to the afterburner chamber, controlling the substantial inhibition of the engine combustion process and the branching off of the charging air as a function of the position of the throttling arrangement in the charging air line, and combusting the fuel-air admixture in the afterburner chamber to thereby generally preclude a drop in turbocharger speed.
Claim 2
Independent Claim
188 words
A method of operating a piston-driven internal combustion engine of a motor vehicle having an exhaust gas turbocharger, in which exhaust gases from cylinders of the engine are conducted to an afterburner chamber and subsequently to an exhaust gas turbine of the turbocharger and in which air under admixture of fuel is blown into the cylinders of the engine by a charging compressor driven by the exhaust gas turbine by way of a throttling arrangement, comprising the steps of substantially inhibiting the engine combustion process when the engine is being driven by the inertia of the motor vehicle, conducting noncombusted fuel-air admixture from the cylinders into the afterburner chamber, branching off the charging air from a line from the charging compressor to the cylinders of the internal combustion engine and conducting the charging air to the afterburner chamber, controlling the substantial inhibition of the engine combustion process and the branching off of the charging air as a function of the position of the throttling arrangement in the charging air line, and combusting the fuel-air admixture in the afterburner chamber to thereby generally preclude a drop in turbocharger speed.
Claim 3
Dependent Claim
202 words
A piston-driven internal combustion engine with an exhaust gas turbocharger, in which exhaust gases from a cylinder of the engine are conducted to an afterburner chamber and subsequently to an exhaust gas turbine of the exhaust gas turbocharger, and in which air under admixture of fuel is blown into the cylinder by a charging compressor driven by the exhaust gas turbine by way of a throttling arrangement, comprising control means operable when the engine is being driven by the inertia of the motor vehicle for substantially inhibiting the engine combustion process and for conducting noncombusted fuel-air admixture from the cylinder into the afterburner chamber, said control means being operable to branch off charging air from a line from the charging compressor means to the cylinder means of the internal combustion engine and to conduct the charging air to the afterburner chamber means when the engine is being driven by the inertia of the vehicle, said control means being operable to control the substantial inhibition of the engine combustion process and to branch off charging air as a function of the position of the throttling arrangement in the charging air line, wherein air-fuel admixture combusted in the afterburner chamber generally maintains turbocharger speed.
Claim 4
Dependent Claim
202 words
A piston-driven internal combustion engine with an exhaust gas turbocharger, in which exhaust gases from a cylinder of the engine are conducted to an afterburner chamber and subsequently to an exhaust gas turbine of the exhaust gas turbocharger, and in which air under admixture of fuel is blown into the cylinder by a charging compressor driven by the exhaust gas turbine by way of a throttling arrangement, comprising control means operable when the engine is being driven by the inertia of the motor vehicle for substantially inhibiting the engine combustion process and for conducting noncombusted fuel-air admixture from the cylinder into the afterburner chamber, said control means being operable to branch off charging air from a line from the charging compressor means to the cylinder means of the internal combustion engine and to conduct the charging air to the afterburner chamber means when the engine is being driven by the inertia of the vehicle, said control means being operable to control the substantial inhibition of the engine combustion process and to branch off charging air as a function of the position of the throttling arrangement in the charging air line, wherein air-fuel admixture combusted in the afterburner chamber generally maintains turbocharger speed.
Claim 5
Dependent Claim
164 words
A piston-driven internal combustion engine with an exhaust gas turbocharger, in which exhaust gases from a cylinder of the engine are conducted to an afterburner chamber and subsequently to an exhaust gas turbine of the exhaust gas turbocharger, and in which air under admixture of fuel is blown into the cylinder by a charging compressor driven by the exhaust gas turbine by way of a throttling arrangement, comprising control means operable when the engine is being driven by the inertia of the motor vehicle for substantially inhibiting the engine combustion process and for conducting noncombusted fuel-air admixture from the cylinder into the afterburner chamber wherein the fuel-air admixture combusted in the afterburner chamber generally maintains turbocharger speed, said control means being operable to control the substantial inhibition of the engine combustion process and branching off of charging air through a line from the charging compressor to the afterburner chamber as a function of the position of the throttling arrangement in the charging air line.
Claim 6
Dependent Claim
164 words
A piston-driven internal combustion engine with an exhaust gas turbocharger, in which exhaust gases from a cylinder of the engine are conducted to an afterburner chamber and subsequently to an exhaust gas turbine of the exhaust gas turbocharger, and in which air under admixture of fuel is blown into the cylinder by a charging compressor driven by the exhaust gas turbine by way of a throttling arrangement, comprising control means operable when the engine is being driven by the inertia of the motor vehicle for substantially inhibiting the engine combustion process and for conducting noncombusted fuel-air admixture from the cylinder into the afterburner chamber wherein the fuel-air admixture combusted in the afterburner chamber generally maintains turbocharger speed, said control means being operable to control the substantial inhibition of the engine combustion process and branching off of charging air through a line from the charging compressor to the afterburner chamber as a function of the position of the throttling arrangement in the charging air line.
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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) | 1989-06-09 | 1989-12-09 | 1990-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-09 | 1993-12-09 | 1994-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-09 | 1997-12-09 | 1998-06-10 | $7700.00 | Window Closed / Lapsed |