| 摘要 |
PURPOSE:To facilitate the varying control of fuel pressure in accordance with the operating condition of an engine by providing a hollow cylinder type valve seat on a diaphragm which is displaced in accordance with the operating condition of said engine and engaging plural springs with said diaphragm. CONSTITUTION:First and second diaphragm 16, 26 are provided interposing a partition wall 15a in between, in a fuel pressure regulating device 14. A first spring 21 presses a valve member 18 against a valve seat 22. And, due to the opening/closing action of the valve member 18, the fuel pressure of a first chamber 19 is kept at a first set value determined by the first spring 21. The rise in temp. of a fuel injection valve 7 is detected by a temp. sensor 8, causing an electronic control device 34 to drive an electromagnetic selector valve 33, thereby, switching over the pressure of an air chamber 27 to the atmospheric pressure. As a result, the valve seat 22 is moved and the fuel pressure in the chamber 19 is increased. Thereby, the varying control of fuel pressure can be easily carried out in accordance with the operating condition of an engine. |
