EP0136541A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
System controlling variable capacity turbine of automotive turbocharger
Assignee: Nissan Motor Co Ltd
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Filing: 1984-08-29
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Granted: —
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Expires: 2004-08-29
Abstract
Abstract In order to derive the optimal supercharging pressure, a basic control signal via which a device which varies the capacity of a turbocharger is controlled, is arranged to increase the supercharge pressure until engine knocking or like indesirable phenomenon occurs, whereafter the throttling provided by the capacity controlling device is incrementally reduced until the phenonomenon disappears. Subsequent increases and decreases in the throttling degree holds the supercharge pressure at the optimal level. When acceleration is required, the maximum degree of throttling is induced and held for a time or until an undesirable pheonomenon occurs. The hold time may be varied with engine operational parameters such as engine speed.
Inventors
- 👤 Yuji Hirabayashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 11:34
CPC Classifications
F; F02; F02D; F02D35/00; F02D35/02; F02D35/027; F01; F01D; F01D17/00; F01D17/10; F01D17/12; F01D17/14; F01D17/146; F02B; F02B37/00; F02B37/12; F02B37/22; F02D41/00; F02D41/0002; F02D41/0007; F02B1/00; F02B1/02; F02B1/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
106 words
In a method of controlling an internal combustion engine turbocharger which includes a volute passage through which exhaust gases flow from an internal combustion engine associated with said turbocharger and means for throttling said passage in a manner to vary the supercharging capacity of said turbocharger, the steps of: (a) sensing a first engine operational parameter; (b) sensing a second engine operational parameter which varies with the supercharging of said engine; (c) generating a control signal SpM for controlling said throttling means in response to the magnitude of said first paramenter; and (d) modifying said control signal in response to the magnitude of said second parameter.
Claim 2
Dependent Claim
106 words
In a method of controlling an internal combustion engine turbocharger which includes a volute passage through which exhaust gases flow from an internal combustion engine associated with said turbocharger and means for throttling said passage in a manner to vary the supercharging capacity of said turbocharger, the steps of: (a) sensing a first engine operational parameter; (b) sensing a second engine operational parameter which varies with the supercharging of said engine; (c) generating a control signal SpM for controlling said throttling means in response to the magnitude of said first paramenter; and (d) modifying said control signal in response to the magnitude of said second parameter.
Claim 3
Dependent Claim
76 words
A method as claimed in claim 1, further comprising the steps of: (e) sensing the demand for engine acceleration; (f) modifying said control signal in response to said demand for acceleration in a manner to cause said throttling means to increase the throttling of said passage to at least a predetermined degree until an undesired phenomenom occurs; and (f) modifying said control signal in response to the occurence of said undesirable phenomenon until said undesirable.phenomenon disappears.
Claim 4
Dependent Claim
36 words
A method as claimed in claim 2, further comprising the step of: maintaining, in the absence of said undesired phenomenon, the modification of said control signal derived in step (f) for a predetermined period of time.
Claim 5
Dependent Claim
25 words
A method as claimed in claim 3, further comprising the step of varying said predetermined period of time in reponse to a selected operational parameter.
Claim 6
Dependent Claim
94 words
In an internal combustion engine a turbocharger ahving a volute passage through which exhaust gases of said engine flow means for throttling said passage so as to vary the supercharging capacity of said turbocharger; means for sensing a first engine operational parameter; means for sensing a second engine operational parameter which varies with the supercharging of said engine; means for generating a control signal for controlling said throttling means in response to the magnitude of said first parameter; and means for modifying said control signal in response to the magnitude of said second parameter.
Claim 7
Dependent Claim
94 words
In an internal combustion engine a turbocharger ahving a volute passage through which exhaust gases of said engine flow means for throttling said passage so as to vary the supercharging capacity of said turbocharger; means for sensing a first engine operational parameter; means for sensing a second engine operational parameter which varies with the supercharging of said engine; means for generating a control signal for controlling said throttling means in response to the magnitude of said first parameter; and means for modifying said control signal in response to the magnitude of said second parameter.
Claim 8
Dependent Claim
79 words
An internal combustion engine as claimed in claim 5, further comprising: means for sensing a demand for engine acceleration; means for modifying said control signal in resposne to said demand for acceleration in a manner to cause said throttling means to increase the throttling of said passage at least to a predetermined degree until an undesirable phenomenon occurs; and means for modifying said control signal in response to the occurence of said undesirable phenomenon until said undesirable phenomenon disappears.
Claim 9
Dependent Claim
41 words
An internal combustion engine as claimed in claim 6, further comprising means for maintaining in the absence of said undesired phenomenon, the modification of said control signal derived in response to the demand for acceleration, for a predetermined period of time.
Claim 10
Dependent Claim
25 words
An engine as claimed in claim 7, further comprising means for varying said predetermines period of time in response to a selected engine operation parameter.
References Cited (Backward Citations)
No citation records indexed.
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