公开(公告)号：US20190032618A1

公开(公告)日：2019-01-31

申请号：US15754944

申请日：2016-08-26

Applicant: Westport Power Inc.

Inventor： Dominique J. SOLERI ,  Patric OUELLETTE ,  Hamed KARIMI SHARIF

IPC: F02M65/00 ,  F02M53/04 ,  F02D17/02 ,  F02M25/14 ,  B08B5/02 ,  B08B17/06 ,  F02D41/00 ,  F02D41/40 ,  F02M21/02 ,  F02D41/22 ,  F02M43/04

CPC classification number: F02M65/008 ,  B08B5/02 ,  B08B17/06 ,  B08B2203/027 ,  F02B77/04 ,  F02D17/02 ,  F02D19/0605 ,  F02D19/0623 ,  F02D19/0647 ,  F02D19/0689 ,  F02D19/0694 ,  F02D19/081 ,  F02D41/0025 ,  F02D41/0027 ,  F02D41/008 ,  F02D41/22 ,  F02D41/401 ,  F02D2041/389 ,  F02D2200/06 ,  F02M21/0248 ,  F02M21/0263 ,  F02M21/0275 ,  F02M21/0293 ,  F02M25/14 ,  F02M43/04 ,  F02M53/043 ,  F02M2200/06 ,  F02M2200/46 ,  Y02T10/32 ,  Y02T10/36 ,  Y02T10/44

Abstract: A method for deposit mitigation in a gaseous fuel injector that introduces a gaseous fuel through a gaseous fuel orifice directly into a combustion chamber of an internal combustion engine includes at least one of a) reducing the ago length of the gaseous fuel orifice by substantially between 10% to 50% of a previous length of a previous gaseous fuel orifice showing deposit accumulation above a predetermined threshold; b) providing the gaseous fuel orifice with an inwardly and substantially linearly tapering profile; c) determining deposit mitigation is needed; and performing at least one of the following deposit mitigation techniques i) increasing gaseous fuel injection pressure wherein deposit accumulation is reduced during fuel injection; and ii) decreasing gaseous fuel temperature wherein a rate of deposit accumulation is reduced; and d) injecting compressed air through the gaseous fuel orifice during shutdown of the internal combustion engine; whereby torque loss in the internal combustion engine due to deposit accumulation in the gaseous fuel orifice is reduced below a predetermined value.