专利名称：Fuel injection apparatus for an engine发明人：Atsushi Niimi,Hiroshi Uruno申请号：US10305240申请日：20021127公开号：US06792920B2公开日：20040921
专利附图：
摘要：A redundant mechanism includes two pressure regulating valves for coveringone of the pressure regulating valves when the other one is in a defective condition. Firstand second pressure regulating valves are provided as pressure regulating members ofthe fuel injection circuit. The valves are connected to the reflux passage and the by-pass
passage that communicates with the fuel injection passage via the first and the secondorifices, respectively. First and second sensors are provided for detecting the fuelpressure applied on the respective pressure regulating valves separately. A controller ofthe failure diagnostic member compares the fuel pressures P, Pdetected by the first andsecond sensors and the predetermined fuel pressure P in the fuel injection passage. If PP,both of the first and the second pressure regulating valves are determined to be normal.When a defective operating condition occurs in one of the pressure regulating valves,Pand Pvary. Therefore, it is determined to be abnormal based on the differentialpressure and a display is activated.
申请人：HONDA GIKEN KOGYO KABUSHIKI KAISHA
代理机构：Birch, Stewart, Kolasch & Birch, LLP
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