Abstract: An injection nozzle for use in delivering fuel to a combustion space, the injection nozzle comprising a nozzle body, at least a part of which is provided with a first coating arranged so as to reduce the temperature of at least a part of the nozzle body, in use. The coating may have either a higher or lower thermal conductivity than the thermal conductivity of the nozzle body.

Abstract: An injection nozzle for use in delivering fuel to a combustion space, the injection nozzle comprising a nozzle body, at least a part of which is provided with a first coating arranged so as to reduce the temperature of at least a part of the nozzle body, in use. The coating may have either a higher or lower thermal conductivity than the thermal conductivity of the nozzle body.

Abstract: A connector is disclosed which is intended for use with an injector. The connector comprises a projection defining an inlet passage sealed, in use, within a bore provided in the injector. The inlet passage communicates with at least one outlet passage. The connector further comprises at least one tooth received within a recess provided in the injector to secure the connector to the injector. The recess is conveniently defined by a body and nut forming part of the injector.

Abstract: A mounting arrangement for mounting a component, for example a fuel injector, in a desired position comprises a sleeve which surrounds part of the component and includes a screw-threaded end region. At a point spaced from the first end, the sleeve defines a groove arranged to receive a resilient member which cooperates, in use, with a groove provided in the component to secure the component to the sleeve.

Abstract: A fuel system is disclosed which comprises a fuel pump, a spill valve and an injector provided in a single unit. The injector includes a valve member biased towards a seating by a coiled compression spring. The spring is engaged between a spring abutment of the valve member and a piston. The piston is arranged such that the face thereof facing away from the spring has fuel applied thereto when the spill valve is opened in order to assist movement of the valve member into engagement with the seating.

Abstract: A fuel injection pumping apparatus includes an injection pump to which fuel is supplied from a feed pump under the control of throttle means. A component of the injection pump is adjustable by the application of fluid pressure to a piston. The fluid pressure is derived by way of a fixed orifice the downstream of which is connected to a cylinder containing the piston, the downstream side of the orifice being connected to a drain by way of a second fixed orifice and a variable orifice is provided which is adjustable with the throttle means and which determines the pressure applied to the piston.