US 7,222,613 B2 · Fuel delivery system

Abstract

A fuel delivery system for an engine is disclosed which includes an injector (20) and a housing (3) for supporting a fuel injector (20). A regulator (202, 313) is provided for regulating the pressure of fluid in the housing to maintain the pressure at about supply pressure, and the pressure downstream of the regulator at a low pressure so that fuel which passes the regulator is able to evaporate. The evaporated fuel is supplied to a heater (250) to heat the fuel, and the vapour is supplied to a vapour injector (260) for injection into the engine. The passage of the liquid petroleum gas fuel through the housing (3) cools the injector (20) to maintain the fuel in a liquid state, and therefore prevent boiling of the vapour within the injector.

Claims25

Dependent claims

A fuel delivery system for an engine including:

a liquid injector for receiving liquid gas and for ejecting liquid gas in liquid form to the cylinders of an engine;
means for preventing vaporisation or bubbling of the liquid gas in the liquid injector so the liquid gas is ejected from the injector in liquid form;
collection means for collecting vaporised liquid gas;
a bleed injector for delivering the collected liquid gas vapour to the cylinder of the engine;
and
wherein the system includes liquid gas supply means for supplying liquid gas for ejection by the injector, the collection means comprises a debubbling chamber in which bubbled or vaporised liquid gas is collected, the injector being located in the chamber so that the collected vapour facilitates cooling of the injector, and a vapour supply line for supplying vapour from the chamber to the bleed injector.

3 more elements

Dependencies are inferred from the claim text.

Fuel delivery system

Life of this patent

Fuel delivery system

Life of this patent

Abstract

Claims25