초록 ▼

A fuel supply apparatus for use with a gaseous fuel engine is provided with an intake passage having an inlet port open to a cylinder and adapted for supplying air into the cylinder therethrough; a fuel supply device for supplying gaseous fuel into the cylinder, the fuel supply device including at l

A fuel supply apparatus for use with a gaseous fuel engine is provided with an intake passage having an inlet port open to a cylinder and adapted for supplying air into the cylinder therethrough; a fuel supply device for supplying gaseous fuel into the cylinder, the fuel supply device including at least two fuel supply systems each of which is provided with fuel amount adjusting mechanism for adjusting an amount of gaseous fuel to be supplied, the fuel supply systems including high and low pressure fuel supply systems used in a high induction zone where a large amount of air is admitted into the cylinder and in a low induction zone where a small amount of air is admitted into the cylinder, the high pressure fuel supply system being constructed so that the gaseous fuel is supplied into the cylinder during a former half of a compression stroke following an air intake stroke of the engine at a pressure higher than a pressure in the cylinder through a gaseous fuel supply port open to the cylinder independently of the inlet port, and the low pressure fuel supply system being constructed so that the accuracy of adjusting the fuel amount when a fuel supply amount is small is higher than the high pressure fuel supply system; and control means for controlling actuation of the respective fuel supply systems according to an operating state of the engine.

대표청구항 ▼

A fuel supply apparatus for use with a gaseous fuel engine having a cylinder, comprising: an intake passage having an inlet port open to the cylinder and adapted for supplying air into the cylinder therethrough; fuel supply means for supplying gaseous fuel into the cylinder, the fuel supply means ha

A fuel supply apparatus for use with a gaseous fuel engine having a cylinder, comprising: an intake passage having an inlet port open to the cylinder and adapted for supplying air into the cylinder therethrough; fuel supply means for supplying gaseous fuel into the cylinder, the fuel supply means having a high pressure fuel supply system for use in a high induction zone where a larger amount of air is admitted into the cylinder, and a low pressure fuel supply system for use in a low induction zone where a smaller amount of air is admitted into the cylinder; the high pressure fuel supply system having a high pressure fuel supply port open to the cylinder independently of the inlet port, and adapted for supplying a larger amount of gaseous fuel into the cylinder at a pressure higher than a pressure in the cylinder during a former half of a compression stroke following an air intake stroke of the engine; the low pressure fuel supply system adapted for supplying a smaller amount of gaseous fuel into the cylinder at a finer adjusting scale than the high pressure fuel supply system; said low pressure fuel supply system having a first fuel amount adjusting means and said high pressure fuel supply system having a second fuel amount adjusting means, said first fuel amount adjusting means having an adjustment accuracy higher than said second fuel amount adjusting means; and control means for controlling actuation of the respective fuel supply systems according to an operating state of the engine.