发明名称 |
Method for monitoring a system for delivering secondary air to the exhaust gas of an internal combustion engine |
摘要 |
A method for monitoring a system for delivering secondary air to an exhaust tube of an internal combustion engine. In the method a secondary air pump is switched on and builds up a pressure on the inlet side of a blocking valve which is normally closed and not being acted upon. The blocking valve has a valve closing member that is acted upon by a predetermined closing force of an elastic element. If the secondary air quantity pumped by the secondary air pump reaches a certain minimum air quantity and pressure, then with the then-opened blocking valve, a lambda sensor disposed in an exhaust tube detects a change in the lambda value in the exhaust tube that exceeds a predetermined threshold value. The method is suitable for monitoring the function of a system for delivering secondary air to the exhaust tube of an internal combustion engine.
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申请公布号 |
US5526642(A) |
申请公布日期 |
1996.06.18 |
申请号 |
US19940345389 |
申请日期 |
1994.11.18 |
申请人 |
ROBERT BOSCH GMBH |
发明人 |
DAMBACH, DIETER-ANDREAS;FRANK, RAINER;MEZGER, MANFRED |
分类号 |
F01N3/32;F01N3/22;F01N11/00;F02B77/10;F02D35/00;F02D41/14;(IPC1-7):F01N3/22 |
主分类号 |
F01N3/32 |
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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