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EP0096367A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Apparatus for preventing thermal seizure of a turbo-supercharger drive shaft

Assignee: Nissan Motor Co Ltd
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Filing: 1983-06-01
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Granted: —
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Expires: 2003-06-01
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Abstract

Abstract in a first embodiment, a thermal sensor senses the temperature of exhaust from an intemal combustion engine. When the sensed temperature of exhaust exceeds a predetermined value, the sensor produces a drive signal which drives a fan motor (4) to cool the engine compartment and therefore the shaft and bearings of an exhaust turbine of a turbo-super-charger for use with the engine, thereby preventing thermal seizure of the shaft and bearings. In a second embodiment, the fan motor (4) is responsive to the opening of an ignition switch (7) and to the presence of a value (ST) indicative of the drive signal immediately before the opening of the ignition switch (7) to be driven to cool the turbo-supercharger shaft and bearings subjected to high heat produced in the engine compartment after the engine has been stopped.

Inventors

  • 👤 Noboru Yamaguchi
  • 👤 Sachiro Kataoka
  • 👤 Ikuya Kato

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-28 14:06
CPC Classifications
F; F01; F01P; F01P7/00; F01P7/02; F01P7/08; F01P11/00; F01P11/14; F02; F02B; F02B39/00; F02B39/005

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 82 words
Apparatus for preventing thermal seizure of the shaft and bearings of exhaust turbine and compressor of a turbo-supercharger for use with an internal combustion engine, comprising: - means (5;9) for sensing the temperature of exhaust gas from the engine to output a drive signal when the sensed temperature exceeds a predetermined value; - means (4) for cooling the shaft and bearings, and - control means (5;6) responsive to the drive signal for driving the cooling means to cool the shaft and bearings.
Claim 2
Dependent Claim 82 words
Apparatus for preventing thermal seizure of the shaft and bearings of exhaust turbine and compressor of a turbo-supercharger for use with an internal combustion engine, comprising: - means (5;9) for sensing the temperature of exhaust gas from the engine to output a drive signal when the sensed temperature exceeds a predetermined value; - means (4) for cooling the shaft and bearings, and - control means (5;6) responsive to the drive signal for driving the cooling means to cool the shaft and bearings.
Claim 3
Dependent Claim 65 words
Apparatus according to claim 1, characterized in that said control means includes a timer (6) responsive to the opening of an ignition switch (7) and the presence of a value indicative of the drive signal from said sensing means (9) immediately before the opening of the ignition, switch to drive the cooling means (4) for a particular time interval after the ignition switch has opened.
Claim 4
Dependent Claim 74 words
Apparatus according to claim 2, characterized in that said timer (6) includes means (AS) responsive to the closing of said ignition switch (7) for supplying power therethrough to said sensing means (9) and responsive to the opening of said ignition switch (7) for interrupting the supply of said power to said sensing means (9), and means (C 2 ,r 3 ) for holding the value indicative of the drive signal for a short time.

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