Abstract: A controller for determining an injection strategy for a fuel injector within a hydrogen fuel injection system within an engine, the controller comprising: an input arranged to receive an engine operating parameter and a pressure signal associated with the pressure of hydrogen fuel available for injection from the injector in the fuel injection system; a processor arranged to determine an injection strategy for the injector in dependence on the received pressure signal and engine control parameter, the determined injection strategy comprising one or more injector control signals to control operation of the fuel injector; an output arranged to output the one or more control signals to the fuel injector.

Abstract: A fuel injector for an internal combustion engine comprising an injection nozzle comprising a nozzle body with a nozzle bore; a valve needle assembly received within the nozzle bore and including a valve needle engageable with a seat region to control fuel delivery through an outlet of the injection nozzle; and a first actuator arrangement operable to apply an opening force to an engagement region of the valve needle assembly to cause an opening movement thereof. The first actuator arrangement comprises a first conductive coil mounted concentrically on a first body and a first armature configured to apply the opening force to the valve needle assembly. The first body comprises a first, radially inner region having a relatively high magnetic permeability and a second region having a relatively low magnetic permeability, the second region being disposed radially between the first coil and the first, radially inner region.

Abstract: An injection device for injecting a combined water/gaseous fuel mixture into a combustion space of an engine. The injection device comprises: a first inlet for receiving a supply of water into a water chamber; a second inlet for receiving a supply of gaseous fuel into a flow passage; a mixing device comprising a valve assembly which is configured to control the flow of water between the water chamber and the flow passage so as to establish a combined gaseous fuel/water mixture within the flow passage; and an injection nozzle including a valve needle which is operable to control the delivery of the combined gaseous fuel/water mixture from the flow passage into the combustion space. The disclosure also extends to a fuel injection system.

Abstract: A controller for determining an injection strategy for a fuel injector within a hydrogen fuel injection system within an engine, the controller comprising: an input arranged to receive an engine operating parameter and a pressure signal associated with the pressure of hydrogen fuel available for injection from the injector in the fuel injection system; a processor arranged to determine an injection strategy for the injector in dependence on the received pressure signal and engine control parameter, the determined injection strategy comprising one or more injector control signals to control operation of the fuel injector; an output arranged to output the one or more control signals to the fuel injector.

Abstract: A fuel injector for an internal combustion engine comprising an injection nozzle comprising a nozzle body with a nozzle bore; a valve needle assembly received within the nozzle bore and including a valve needle engageable with a seat region to control fuel delivery through an outlet of the injection nozzle; and a first actuator arrangement operable to apply an opening force to an engagement region of the valve needle assembly to cause an opening movement thereof. The first actuator arrangement comprises a first conductive coil mounted concentrically on a first body and a first armature configured to apply the opening force to the valve needle assembly. The first body comprises a first, radially inner region having a relatively high magnetic permeability and a second region having a relatively low magnetic permeability, the second region being disposed radially between the first coil and the first, radially inner region.

Abstract: A torque wrench for applying torque to a component (21) is described. The torque wrench has an engaging member (18) for engaging the component (21) to be rotated about an axis (22) and a ratchet member (25) connected to the engaging member (18). A drive lever (14) is connected to the engaging member (18) via the ratchet member (25) such that rotation of the drive lever (14) in one sense about axis (22) applies torque to the engaging member (18) and rotation of the drive lever (14) in the opposite sense applies torque below a predetermined value to the engaging member (18). A connecting member (12) is pivotably connected to the drive lever (14) remote from the engaging member (18) and is adapted to be engaged by a head (10) of a piston (6) having reciprocating linear movement to alternately rotate the drive lever (14) in opposite senses about axis (22). The connecting member (12) is slidable relative to the piston head (10) in a direction transverse to the direction of reciprocal linear movement.

Abstract: A quick release nut (1) includes a pair of body members or segments (2, 3) having internal surfaces (4) to be placed around and engage the shaft of a bolt. The segments (2, 3) are movable between an operative position and an inoperative position in which the segments (2, 3) are spaced further apart. A pin (8) and quick release cartridge (15) on segment (2) slide within corresponding channels (12, 18) in segment (3), and a pair of ball bearings (25, 26) are released from the groove (28) by pushing the end of pin (21) axially relative to the quick release cartridge (15).

Abstract: A torque wrench for applying torque to a component (21) is described. The torque wrench has an engaging member (18) for engaging the component (21) to be rotated about an axis (22) and a ratchet member (25) connected to the engaging member (18). A drive lever (14) is connected to the engaging member (18) via the drive lever (14) in one sense about axis (22) applies torque to the engaging member (18) and rotation of the drive lever (14) in the opposite sense applies torque below a predetermined value to the engaging member (18). A connecting member (12) is pivotably connected to the drive lever (14) remote from the engaging member (18) and is adapted to be engaged by a head (10) of a piston (6) having reciprocating linear movement to alternately rotate the drive lever (14) in opposite senses about axis (22). The connecting member (12) is slidable relative to the piston head (10) in a direction transverse to the direction of reciprocal linear movement.

Abstract: A hydraulic torque wrench comprises a body member housing a piston-cylinder assembly and a drive member pivotal by the piston of the assembly about an axis radially spaced from the line of action of the piston, the drive member carrying a shaft or socket connected to the drive member by a ratchet connection. A spherical bearing member is mounted to the end of the piston for guided linear reciprocal movement therewith, a neck portion of the drive member being slidably received in a bore in the bearing member whereby, as the drive member is pivoted by movement of the piston, the neck portion of the drive member undergoes guided sliding movement in the bore of the bearing member, the bearing member rotating relative to the piston such that the perpendicular distance between the line of action of the piston and the pivot axis remains constant.