Patent US2728475A successfully refreshed from Google Patents.
JPS5227922A
Expired / Lapsed
JP
⏱️ 0.0 years remaining
Operation diagnostic device for exhaust gas recirculation valve
Assignee: Hitachi Ltd
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Filing: 1975-08-27
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Granted: —
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Expires: 1995-08-27
Abstract
Abstract PURPOSE:Intake negative pressures before and after the operation of EGR valve are measured and the differences in pressures are compared, thereby an operation of EGR valve is diagnosed.
Inventors
- 👤 Naoya Seki
Bibliographic Details
Application Number
—
Jurisdiction
JP
Data Source
google_patents
Last Synchronized
2026-10-23 20:13
CPC Classifications
F; F02; F02M; F02M26/00; F02M26/52; F02M26/55; F02M26/49
Claims Analysis
Total Claims: 0
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