公开(公告)号：US20170314510A1

公开(公告)日：2017-11-02

申请号：US15520540

申请日：2015-11-05

Applicant: WALBRO LLC

Inventor： Takashi ABEI ,  Naoya KUMAGAI

IPC: F02M17/34 ,  F02M37/04 ,  F02M37/12 ,  F04B43/06

CPC classification number: F02M17/34 ,  F02M7/08 ,  F02M17/04 ,  F02M37/046 ,  F02M37/12 ,  F04B43/06

Abstract: In at least some implementations, a carburetor includes a body, a fuel pump diaphragm and a pressure pulse passage. The fuel pump diaphragm is carried by the body and defines in part a fuel chamber on one side of the fuel pump diaphragm and a pressure pulse chamber on the other side of the fuel pump diaphragm. The pressure pulse passage communicates the pressure pulse chamber with a pressure pulse source to provide pressure pulses in the pressure pulse chamber to actuate the fuel pump diaphragm. The pressure pulse passage includes an inlet communicating with a passage in which pressure pulses are present and the inlet is spaced from a surface defining the passage in which pressure pulses are present.

公开(公告)号：US20180195443A1

公开(公告)日：2018-07-12

申请号：US15743857

申请日：2016-07-22

Applicant: WALBRO LLC

Inventor： Takashi ABEI ,  Martin N. ANDERSSON ,  Cyrus M. HEALY

IPC: F02D35/00 ,  F02D41/00 ,  F02D41/14 ,  F02P5/06

Abstract: At least some implementations of a method of distinguishing between two loads being driven by an engine, includes the steps of determining engine speed at defined intervals, comparing a second engine speed against a previously determined first engine speed, determining if the second engine speed fits an expected pattern of engine speeds, and counting either the number of incidents where the second engine speed does not fit the expected pattern, or the number of incidents where the second engine speed does fit the expected pattern, or some combination of these two. A method of determining if an engine is operating at least near a lean limit of its air to fuel ratio is also disclosed.