Power plants – Fluid motor means driven by waste heat or by exhaust energy... – With supercharging means for engine
Reexamination Certificate
2001-02-14
2002-08-13
Denion, Thomas (Department: 3748)
Power plants
Fluid motor means driven by waste heat or by exhaust energy...
With supercharging means for engine
C251S123000, C123S568180, C123S568270, C123S568230
Reexamination Certificate
active
06430929
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to exhaust gas recirculation (EGR) systems, and more particularly, to an EGR valve integrated into a turbocharger with a valve inlet cast into the turbine housing and an actuation system mounted directly to the turbocharger.
2. Description of the Prior Art
Commercial Diesel EGR Systems require an EGR valve to control the flow of exhaust gas into the intake manifold. Commercial Diesel EGR Systems are characterized by very challenging packaging constraints of the EGR system, within the existing vehicle envelope, sensitivity to EGR system pressure losses and fuel consumption.
Present EGR systems are typically configured using separate components for each element of the system. This approach does not allow optimization of the system to accommodate the challenges described.
SUMMARY OF THE INVENTION
The present invention addresses the packaging and EGR system pressure loss resulting in a minimized effect on the vehicle fuel consumption. An EGR valve is incorporated onto a turbocharger turbine housing in a more compact manner than a separate EGR valve assembly (which is more typical within the component suppliers). In addition, the EGR valve is located such that the EGR system pressure losses are minimized (relative to the EGR valve). This is accomplished by taking advantage of the dynamic pressure associated with the turbine inlet flow. The design of the EGR valve integration provides “infinite” flexibility in the orientation of the EGR valve outlet relative to the turbocharger centerline. This feature aids significantly in the packaging of the EGR system within the vehicle installation constraints. The design of the EGR valve lends itself to this packaging advantage. The invention employs a “swing valve” design. A EGR port is cast into the turbocharger turbine housing such that the gas dynamics of the engine exhaust entering the turbine housing supplements the flow of exhaust gas into the EGR system therefore reducing the EGR system pressure losses. The EGR valve is attached to the turbine housing such that the exhaust port from the EGR valve may be directed in an infinite number of directions without redesign of the turbocharger, turbine housing, or EGR valve sub-assembly.
The EGR valve actuator, and associated actuator mounting bracket are combined as a sub-assembly for mounting to the turbocharger permitting the EGR valve exhaust port to be directed in the best orientation for the EGR System/engine packaging.
REFERENCES:
patent: 5617726 (1997-04-01), Sheridan et al.
patent: 5943864 (1999-08-01), Sumser et al.
patent: 5947681 (1999-09-01), Rochford
patent: 6000222 (1999-12-01), Regnier
patent: 6026791 (2000-02-01), Arnold
patent: 6032465 (2000-03-01), Regnier
patent: 6062535 (2000-05-01), Ruth et al.
patent: 6089019 (2000-07-01), Roby et al.
patent: 6168134 (2001-01-01), Ruth et al.
patent: 6263672 (2001-07-01), Ropby et al.
patent: WO 99 31375 (1999-06-01), None
patent: WO-009935390 (1999-07-01), None
Patent Abstracts of Japan vol. 004, No. 171(M-044), Nov. 26, 1980 & JP 55 123344 A Nissan Motor Co. Ltd; Sep. 22, 1980 abstract.
Fischer Felix
Honeywell International , Inc.
Starr Ephraim
LandOfFree
Turbocharger with integrated exhaust gas recirculation valve does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Turbocharger with integrated exhaust gas recirculation valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Turbocharger with integrated exhaust gas recirculation valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2969758