Patent EP0685638A2 successfully refreshed from Google Patents.
EP0685638A2
Expired / Lapsed
EP
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Turbocharger control management system
Assignee: Dresser LLC
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Filing: 1995-04-28
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Granted: —
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Expires: 2015-04-28
Abstract
Abstract An electronic turbocharger control system for an internal combustion engine is provided to control at least one turbocharger by controlling a bypass valve and a wastegate in response to the engine speed, engine load, ambient temperature, and the operating environment's barometric pressure wherein the turbocharger is controlled to operate within predetermined islands of efficiency on a pressure ratio versus mass airflow map thereby allowing the adaptation of one turbocharger assembly for various applications. The method and apparatus provides improved engine efficiency and increases low speed torque.
Inventors
- 👤 Michael T. Zimmer
- 👤 Richard J. Kakoczki
- 👤 James A. Davis
- 👤 Jerrold A. Pratt
- 👤 Edward O. Reinbold
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 22:36
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/14; F02D41/1438; F02D41/1444; F02D41/1448; F02B; F02B37/00; F02B37/12; F02B37/16; F02B37/18; F02D41/0002; F02D41/0007; F02D41/1401; F02D2041/1409; F02D2200/00; F02D2200/02; F02D2200/04; F02D2200/0406; F02D2200/0414; F02D2200/70; F02D2200/703; F02D41/18; F02D41/187; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
89 words
An electronic turbocharger control system for an internal combustion engine comprising: - at least one turbocharger connected to the engine and having a turbine and a compressor; - at least one engine characteristic monitor; - an engine characteristic signal produced by the monitor; - an electronic control for processing the characteristic signal; - a control signal produced by the processor in response to the characteristic signal; - a bypass valve connected between the compressor and the turbine for changing airflow through the compressor in response to the control signal.
Claim 2
Dependent Claim
22 words
The control system of claim 1, wherein the bypass valve routes at least a portion of the compressor airflow into the turbine.
Claim 3
Dependent Claim
23 words
The control system of claim 1 or 2, wherein at least a portion of the compressor airflow is diverted away from the turbine.
Claim 4
Dependent Claim
42 words
The control system of any of claims 1 to 3, wherein the electronic control controls the compressor airflow to include routing a portion of the compressor airflow into the turbine and directing a portion of the compressor airflow away from the turbine.
Claim 5
Dependent Claim
42 words
The control system of any of claims 1 to 4, further comprising a bypass control actuator to create a response signal indicating a position of the bypass valve, wherein the electronic control receives the response signal and monitors the bypass valve position.
Claim 6
Dependent Claim
90 words
An electronic turbocharger control system for an internal combustion engine comprising: - at least one turbocharger connected to the engine and having a turbine and a compressor; - at least one engine characteristic monitor; - an engine characteristic signal produced by the monitor; - an electronic control for processing the characteristic signal; - a control signal produced by the processor in response to the characteristic signal; - a wastegate connected between the engine and the turbine for diverting engine exhaust away from the turbine in response to the control signal.
Claim 7
Dependent Claim
43 words
The control system of any of claims 1 to 6, further comprising a plurality of engine characteristic monitors to sense at least engine speed and intake manifold pressure and each engine characteristic monitor produces an engine characteristic signal in response to the sensing.
Claim 8
Dependent Claim
43 words
The control system of any of claims 1 to 7, wherein the electronic control comprises a memory programmed with predetermined parameters wherein the electronic control selects a predetermined parameter from the memory and produces the control signal based upon the engine characteristic signals.
Claim 9
Dependent Claim
39 words
The control system of claim 8, wherein the memory comprises sets of predetermined parameters, each set based upon barometric pressure, and the electronic control is preprogrammed to select the correct set of predetermined parameters for a given barometric pressure.
Claim 10
Dependent Claim
25 words
The control system of any of claims 6 to 9, wherein the wastegate routes at least a portion of the engine exhaust into the turbine.
Claim 11
Dependent Claim
43 words
The control system of any of claims 6 to 10, wherein the electronic control controls the engine exhaust flow to include routing a portion of the engine exhaust into the turbine and directing a portion of the engine exhaust away from the turbine.
Claim 12
Dependent Claim
42 words
The control system of any of claims 6 to 11, further comprising a wastegate control actuator to create a response signal indicating a position of the wastegate valve, wherein the electronic control receives the response signal and monitors the wastegate valve position.
Claim 13
Dependent Claim
56 words
An internal combustion engine turbocharger control system comprising: - at least one turbocharger connected to the engine and having a turbine and a compressor; - a bypass valve connecting the compressor and the turbine; - a wastegate connected between the engine and turbine; - an electronic control controlling in combination the bypass valve and the wastegate.
Claim 14
Dependent Claim
27 words
The control system of any of claims 1 to 13, wherein said electronic control responds to at least one engine characteristic monitor sensing a given engine characteristic.
Claim 15
Dependent Claim
18 words
The control system of any of claims 1 to 14, wherein the engine characteristic monitor senses engine speed.
Claim 16
Dependent Claim
18 words
The control system of any of claims 1 to 14, wherein the engine characteristic monitor determines engine load.
Claim 17
Dependent Claim
17 words
The control of claim 16, wherein the engine characteristic senses intake manifold pressure to determine engine load.
Claim 18
Dependent Claim
18 words
The control system of any of claims 1 to 17, wherein the engine characteristic monitor senses ambient temperature.
Claim 19
Dependent Claim
48 words
The control system of any of claims 1 to 18, further comprising: - an engine speed sensor; - an engine intake manifold pressure sensor; and wherein the electronic control responds to the engine speed sensor and engine intake manifold pressure sensor to control the bypass valve and wastegate.
Claim 20
Dependent Claim
44 words
The control system of any of claims 1 to 19, further comprising a barometric pressure sensor and wherein the electronic control responds to the engine speed sensor, engine intake manifold pressure sensor, and the barometric pressure sensor to control the bypass valve and wastegate.
Claim 21
Dependent Claim
58 words
The control system of any of claims 1 to 20, wherein the turbocharger operation can be graphically represented on a map of compressor discharge pressure over barometric pressure versus turbocharger airflow wherein the map includes islands of efficiency and the electronic control maintains the turbocharger operation within the islands of efficiency by controlling the bypass valve and wastegate.
Claim 22
Dependent Claim
73 words
The control system of any of claims 1 to 21, further comprising an engine intake throttle arranged between the compressor and the engine and having a throttle angle for variably controlling engine intake air wherein the throttle angle versus engine load can be graphically represented and wherein the electronic control provides for a substantially linear graph of the throttle angle change as the engine load varies by controlling the bypass valve and wastegate.
Claim 23
Dependent Claim
49 words
The control system of any of claims 1 to 22, wherein the electronic control includes a processor and a memory, wherein the memory is programmed with predetermined parameters and wherein the processor selects a predetermined parameter from the memory for controlling the bypass valve and the wastegate in combination.
Claim 24
Dependent Claim
29 words
The control system of any of claims 1 to 23, wherein the turbocharger has a preferred band of operation based upon engine speed, barometric pressure and intake manifold pressure.
Claim 25
Dependent Claim
28 words
The control system of claim 24, wherein the electronic control maintains the turbocharger operation within the preferred band of operation by varying the bypass valve and the wastegate.
Claim 26
Dependent Claim
34 words
The control system of any of claims 1 to 25, further comprising a bypass duct having the bypass valve and an orifice therein and a wastegate duct having the wastegate and an orifice therein.
Claim 27
Independent Claim
59 words
A method of controlling the operation of a turbocharger on an internal combustion engine comprising the steps of: - obtaining barometric pressure; - obtaining intake manifold pressure; - obtaining engine speed; - determining a preferred turbocharger output based on the intake manifold pressure, engine speed and barometric pressure; - regulating turbocharger output in response to the preferred turbocharger output.
Claim 28
Dependent Claim
31 words
The method of claim 27, wherein the step of regulating turbocharger output is further defined to include diverting turbocharger output away from the engine in response to the preferred turbocharger output.
Claim 29
Independent Claim
62 words
A method of controlling the operation of a turbocharger on an internal combustion engine comprising the steps of: - obtaining barometric pressure; - obtaining intake manifold pressure; - obtaining engine speed; - determining a preferred turbocharger output based on the intake manifold pressure, engine speed and barometric pressure; - regulating engine exhaust to the turbocharger in response to the preferred turbocharger output.
Claim 30
Dependent Claim
32 words
The method of claim 29, wherein the step of regulating engine exhaust is further defined to include diverting engine exhaust away from the turbocharger turbine in response to the preferred turbocharger output.
Claim 31
Independent Claim
82 words
A method of controlling the operation of a turbocharger on an internal combustion engine having a wastegate and bypass valve comprising the steps of: - obtaining barometric pressure; - obtaining intake manifold pressure; - obtaining engine speed; - determining a preferred turbocharger output based on the intake manifold pressure, engine speed and barometric pressure; - regulating turbocharger output to the engine in response to the preferred turbocharger output; - regulating engine exhaust to the turbocharger in response to the preferred turbocharger output.
Claim 32
Independent Claim
34 words
The method of any of claims 27 to 31, further comprising the step of obtaining ambient temperature and wherein the step of determining a preferred turbocharger output is also based on the ambient temperature.
Claim 33
Independent Claim
44 words
The method of any of claims 27 to 32, further comprising the step of adapting a particular turbocharger to operate within a preferred band of operation for a plurality of engine applications based upon the intake manifold pressure, engine speed and the barometric pressure.
Claim 34
Independent Claim
43 words
The method of any of claims 27 to 32, further comprising the step of adapting a particular wastegate and bypass valve to an engine and turbocharger based on the size of an orifice in a duct connected to the wastegate and bypass valve.
References Cited (Backward Citations)
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