Abstract: A method for molding a connector which includes a connecting element having a cylindrical body and, one arm extending along an arm axis for the L-shaped connector or, two arms extending along two different arm axes for the T-shaped connector, the body being capable of being connected to an injector, and each arm being capable of being connected to the end of a pipe. The molding method includes a) providing a mold having a cavity for a T-shaped connecting element, the cavity including a cavity for a body and two cavities for arms and b) arranging an insert in the cavity for one of the two arms when an L-shaped connecting element is to be molded.

Abstract: A filter for an aqueous solution, such as urea, of a diesel vehicle selective catalytic reduction system, includes a housing provided with an inlet and with an outlet and, inside which, is arranged a filter element. Variations in volume associated with changes in phase of the aqueous solution are detected and a switch which switches upon changes in phase of the aqueous solution signals the variations in volume.

Abstract: A method for moulding a connector which includes a connecting element having a cylindrical body and, one arm extending along an arm axis for the L-shaped connector or, two arms extending along two different arm axes for the T-shaped connector, the body being capable of being connected to an injector, and each arm being capable of being connected to the end of a pipe. The moulding method includes a) providing a mould having a cavity for a T-shaped connecting element, the cavity including a cavity for a body and two cavities for arms and b) arranging an insert in the cavity for one of the two arms when an L-shaped connecting element is to be moulded.

Abstract: A solenoid valve which regulates the pressure in a pressurized fuel injection system includes a body containing a needle that is pressed by an electromagnet including a coil and a magnetic core. The core has a cavity that is in fluid communication via an internal channel with a counterbore in the body into which the needle protrudes and into which fuel flows during use. The core also has a restriction which restricts the fluid communication and which attenuates pressure waves propagating in the fuel to prevent the waves from moving the core.

Abstract: Filter (28) for an aqueous solution, such as urea, of a diesel vehicle selective catalytic reduction system, comprising a housing provided with an inlet and with an outlet and, inside which, is arranged a filter element, and with a means of detecting variations in volume associated with the changes in phase of the aqueous solution, characterized in that the filter additionally is provided with signaling means (17) for signaling said changes in volume of the phase of the aqueous solution.