F - Mech Eng,Light,Heat,Weapons – 02 – M
Patent
F - Mech Eng,Light,Heat,Weapons
02
M
F02M 7/18 (2006.01) F02M 7/17 (2006.01) F02M 7/20 (2006.01)
Patent
CA 2164063
The position located above the upper surface of fuel in a float chamber is communicated with the position where the sectional area of a suction passage varies or the position in the vicinity of the foregoing position via a negative pressure introduction passage. The intermediate part of the negative pressure passage is opened or closed by a solenoid valve adapted to be controlled by electronic controlling means. An opening/closing rate of a solenoid valve is determined by inputting informations from a temperature sensor sensing the atmospheric temperature as well as a pressure sensor sensing the atmospheric pressure into the electronic controlling means. The float chamber is normally communicated with the atmosphere via an atmosphere passage. As an altitude becomes high more and more, the valve opening time for the negative pressure introduction passage is elongated and the differential pressure between the float chamber and the suction passage is reduced, causing a quantity of ejected fuel to be reduced. In addition, as the atmospheric temperature becomes high more and more, the valve opening time for the negative pressure introduction passage is elongated and the differential pressure between the float chamber and the suction chamber is reduced, and a quantity of ejected fuel is reduced so that the air fuel ratio is corrected by adjusting a quantity of fuel to be ejected.
Mikuni Corporation
Smart & Biggar
LandOfFree
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