| 摘要 |
An apparatus for diagnosing leakage of a fuel supply system for a hybrid vehicle is provided to stably diagnose the fuel supply system by smoothly supplying negative pressure necessary for diagnosing the leakage of the fuel supply system even during engine stoppage with simple construction or low costs. An apparatus for diagnosing leakage of a fuel supply system for a hybrid vehicle comprises an assistant tank(3), a negative pressure forming valve(7) and a negative pressure providing valve(9). The assistant tank is connected to an air suction manifold(1) of an engine. The negative pressure forming valve is installed so as to allow the assistant tank to be communicated with a fuel tank(11), and controlled by an engine controller(5). |
