Title:
【発明の名称】内燃機関用パージング及びプライミング装置
Document Type and Number:
Japanese Patent JPH0672576
Kind Code:
B2
Abstract:
A fuel delivery system for purging air from the reservoir (22) of a diaphragm carburetor (18) on an internal combustion engine and for supplying priming fuel to the carburetor air intake (26). An manual pump (12) has an inlet coupled by a fuel line (16) through the carburetor reservoir to a fuel supply (20), and an outlet connected by the fuel line to a constant flow rate nozzle orifice (24) positioned at the carburetor air intake. A pressure switch (36) is connected in the fuel line between the pump and orifice and provides a signal, in the form of a switch closure, to priming control circuitry (46) whenever fuel, as distinguished from air, is pumped through the orifice to the carburetor air intake. The control circuitry receives battery power through the pressure switch contacts, and includes an integrator (50) for accumulating total time of fuel flow and thereby indirectly indicating the total quantity of priming fuel supplied through the constant-flow orifice. When the integrated time duration exceeds a selected threshold, an LED (58) is driven by an oscillator (56) to advise the operator to terminate the manual priming operation. Most preferably, the time-duration threshold is varied as a function of engine temperature.
Inventors:
The James Kenneth Miller
Application Number:
JP7525789A
Publication Date:
September 14, 1994
Filing Date:
March 29, 1989
Export Citation:
Assignee:
Walbro Corporation
International Classes:
F02M1/16; F02M17/04; F02M37/16; F02M37/20; (IPC1-7): F02M1/16; F02M37/16; F02M37/20
Domestic Patent References:
| JP1142252A | ||||
| JP1114931U |
Attorney, Agent or Firm:
Hideo Takino
Next Patent: ガス燃料エンジンの空燃比制御装置