Patent US2801818A successfully refreshed from Google Patents.
EP0599321A1
Expired / Lapsed
EP
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Electronic control system for the speed of rotation of a variable geometry turbocompressor
Assignee: Iveco SpA
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Filing: 1993-11-25
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Granted: —
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Expires: 2013-11-25
Abstract
Abstract An electronic control system (1) for a variable geometry turbocompressor applied to a diesel engine, in which a first circuit (40) produces, in response to input signals (N, FR, BP), a first closed-loop piloting signal supplied to an actuator (31) which modifies the geometrical characteristics of the turbocompressor. The system further comprises a second circuit (44) which receives as input a measurement signal (nT) proportional to the speed of rotation of the turbocompressor and generates a second piloting signal which is supplied to the actuator (31) when the measurement signal (nT) exceeds a stored limit value (nTmax).
Inventors
- 👤 Giancarlo Dellora
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 10:31
CPC Classifications
F; F02; F02B; F02B37/00; F02B37/12; F02B37/22; F02B37/24; F02D; F02D41/00; F02D41/0002; F02D41/0007; F02B3/00; F02B3/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
215 words
An electronic control system for a variable geometry turbocompressor (4) applied to an engine (6), in particular a diesel engine, comprising first electronic calculation means (40) receiving as input a plurality of information signals (N, FR) measured in the engine (6), these first electronic calculation means (40) generating as output (40e), in response to the information signals (N, FR), a first piloting signal (S), characterized in that it comprises second electronic calculation means (44) having an input connected to sensor means (27) coupled to the turbocompressor (4) and generating a measurement signal (nT) proportional to the number of revolutions of the turbocompressor (4), these second electronic calculation means (44) generating as output (44e), in response to the measurement signal (nT), a second piloting signal (SnT), and electronic diverter means (50) having an output (51) adapted to supply a piloting signal to an actuator (31) of the turbocompressor (4) and at least a first (46) and a second (47) input connected respectively to the outputs of the first (40) and the second (44) electronic calculation means, the system (1) further comprising actuator means (53) for the electronic diverter means (50) adapted to connect the output (51) to the second input (47) when the instantaneous value of the measurement signal (nT) exceeds a stored threshold value (nTmax).
Claim 2
Dependent Claim
125 words
A system as claimed in claim 1, characterized in that the second calculation means (44) comprise an electronic calculation unit (90) receiving as input at least one of the information signals (N) and having an input connected to a first input of a summing node (92), this second electronic calculation unit (90) generating as output, for each value of the input signal (N), a signal (nTmax) estimating the limit value of the speed of rotation of the turbocompressor (4), the summing node (92) further comprising a second input connected to the sensor means (27) and receiving the measurement signal (nT), this node (92) having an output supplying an error signal (nTdiff) formed by the difference between the estimate signal (nTmax) and the measurement signal (NT).
Claim 3
Dependent Claim
48 words
A system as claimed in claim 2, characterized in that the second calculation means (44) comprise a processing unit (94) whose input is connected to the output of the node (92) and which has an output communicating with the second input (47) of the electronic diverter means (50).
Claim 4
Dependent Claim
44 words
A system as claimed in claim 3, characterized in that the processing unit (94) comprises integrator-multiplier means (94b), shunter-multiplier means (94a) and multiplier means (94c) disposed in parallel with one another and interposed between the input and the output of the processing unit (94).
Claim 5
Dependent Claim
35 words
A system as claimed in claim 4, characterized in that it comprises switch means (94d) disposed in parallel with the integrator-multiplier means (94b) and adapted to be actuated synchronously with the electronic diverter means (50).
Claim 6
Independent Claim
66 words
A system as claimed in any one of claims 3 to 5, characterized in that it comprises a second node (96) having a first input connected to the output of the processing unit (94) and a second input supplied with a piloting signal of the actuator (31), the second node (96) having an output communicating with the second input (47) of the electronic diverter means (50).
Claim 7
Independent Claim
48 words
A system as claimed in any one of the preceding claims, characterized in that the information signals comprise a first signal (N) proportional to the number of revolutions of the engine (6) and a second signal (FR) proportional to the quantity of fuel supplied to the engine (6).
Claim 8
Independent Claim
40 words
A system as claimed in any one of the preceding claims, characterized in that the first electronic means (40) further receive a feedback signal proportional to the supercharging pressure (BP) measured in a supply duct (13) of the engine (6).
Claim 9
Independent Claim
161 words
A system as claimed in any one of the preceding claims, characterized in that the first electronic means (40) comprise closed-loop calculation means (55) receiving as input the information signals (N, FR) and a feedback signal (BP), these closed-loop calculation means (55) generating as output a first piloting signal (SBP) in response to the information signals (Nmot, FR) and the feedback signal (BP), open-loop calculation means (56) receiving as input the information signals (N, FR) and generating as output a second piloting signal (Smin), and electronic diverter means (57) having first and second inputs (58, 59) connected respectively to the output of the closed-loop calculation means (55) and the output of the open-loop calculation means (56), the diverter means (57) having an output (60) which may be selectively connected to the first (58) or second (59) inputs on the basis of the result of the comparison of the value of the first piloting signal (SBP) with a reference limit value (Slim).
References Cited (Backward Citations)
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