| 摘要 |
PURPOSE:To improve the responsibility of a control valve for fuel temperature change by, in a fuel pressure control device having the first and the second valve to control fuel supply pressure according to differential pressure between an intake pipe negative pressure and the fuel supply pressure and fuel temperature respectively, making the valve part of the second valve function through a temperature sensing element acting on the fuel temperature. CONSTITUTION:This control valve is composed of the first and the second valve 1, 2. The first valve 1 has a diaphragm 11 whose peripheral edge is caulked on a caulking part 45 of a case 40, and the first valve part 12 fixed to the diaphragm 11, end moves a valve body 123 of the first valve part 12 according to differential pressure between intake pressure in an intake pressure introducing pipe 50 and fuel supply pressure in a fuel chamber 500. The second valve 2 is formed of the second valve part 21 fixedly inserted in a through hole 33 on a base 30 of a housing 3 and a thermowax 22 to make the valve part 21 function. when fuel temperature in a fuel passage 222 rises to expend the thermowax 22, the second valve part 21 is thereby closed through a piston 212. |
