发明名称 |
Air/fuel ratio management system with calibration correction for manifold pressure differentials |
摘要 |
An air fuel ratio management system having a calibration correction for the pressure differentials between the exhaust and intake manifolds of the engine is disclosed. The differential calibration corrects the air/fuel ratio of the system for the variable internal exhaust gas recirculation occasioned by changing restrictions to flow found in the intake and exhaust manifolds. In one implementation a differential pressure sensor communicates with both the intake and exhaust manifolds to develop a differential pressure signal. The differential pressure signal is thereafter applied to a function circuit which generates a pressure correction signal. An electronic control unit receives the pressure correction signal and utilizes it to modify the air/fuel ratio calibration according to the functional conversion. In the preferred embodiment the function circuit comprises a voltage controlled linear current source. In another implementation individual pressure sensors are used for each manifold to generate signals to a difference circuit which subtracts the intake manifold absolute pressure from the exhaust manifold absolute pressure to form the differential pressure signal. In either implementation incremental or proportional modification of a variable duration fuel pulse from the electronic control unit can be obtained by the pressure correction signal.
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申请公布号 |
US4269156(A) |
申请公布日期 |
1981.05.26 |
申请号 |
US19790035036 |
申请日期 |
1979.05.01 |
申请人 |
THE BENDIX CORPORATION |
发明人 |
DRELLISHAK, GLEN J. |
分类号 |
F02B75/02;F02D41/32;(IPC1-7):F02B3/00 |
主分类号 |
F02B75/02 |
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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