发明名称 |
Valve operation verification system for verifying valve operation of valve disposed in hot gas flow passage |
摘要 |
A valve operation verifying system for making verification of valve operation of an EGR valve of a type having a diaphragm elastically deformable according to operating conditions of an engine to admit controlled amounts of exhaust gas that is recirculated into an intake air stream which verifies, on a basis of gas pressure in an EGR passage, whether the diaphragm remains elastically deformable as specified and whether a pressure sensor remains free from freezing, and executes the verification of valve operation of the EGR valve on a basis of a change in the gas pressure in the EGR passage when the EGR valve opens and when it closes, and when the temperature of ambient air is lower than a critical point, verifying that the diaphragm remains elastically deformable as specified and that said pressure sensor is free from freezing.
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申请公布号 |
US6035835(A) |
申请公布日期 |
2000.03.14 |
申请号 |
US19970980442 |
申请日期 |
1997.11.28 |
申请人 |
MAZDA MOTOR CORPORATION |
发明人 |
SHIGIHAMA, SHINGO;HOSOKAI, TETSUSHI;KAMAKURA, TAMOTSU;SAKAMOTO, KATSUHIKO;NISHIOKA, FUTOSHI;KOTOKU, MASANOBU;SHINMOTO, KAZUHIRO |
分类号 |
F02M25/07;(IPC1-7):F02M25/07 |
主分类号 |
F02M25/07 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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