A fluid delivery system having a closed-loop control process for delivering a medical fluid to a patient. A fluid infusion system includes a pump for delivering a fluid to a patient via an administration tube. A flow sensor associated with the administration tube provides an indication of the actual flow rate of fluid in the administration tube. Such a flow sensor may comprise a positive displacement flow sensor constructed using micro-fabrication and/or micro-molding techniques. A reader reads the actual flow rate signal and provides an indication to a controller for controlling the pump. The flow rate information can also be used for providing status information, such as the existence of a blockage in the fluid delivery system.

Fluid delivery system and flow control therefor

A crankshaft for a V-type engine comprises an intermediate main journal which is rotatably supported in a main bearing, a primary crankpin, a pair of crankarms, and a second crankpin. The intermediate main journal has a primary boundary plane extending between the longitudinal axis of the intermediate main journal and the outer surface of the intermediate main journal. The intermediate main journal also has a secondary boundary plane extending between the longitudinal axis of the intermediate main journal to the outer surface of the intermediate main journal. A main cross passage extends through the intermediate main journal. The main cross passage is contained in a radial plane of the intermediate main journal. The main cross passage is oriented with respect to the primary and secondary crankpins so that the ends of the main cross passage are between the sides of the primary and secondary boundary planes which face the primary crankpin. A primary connecting passages extends from the main cross passage through the one crankarm to the outer surface of the primary crankpin.

Crankshaft with lubrication passages

A piston is reliably cooled from its backside by using an oil for lubricating portions around a crank pin of a crankshaft An engine including a crankshaft is provided with lubricating oil bores to supply an oil from journals of the crankshaft to an outer peripheral surface of a crank pin A larger end of the connecting rod is provided with a pair of opposed axial oil grooves in its outer peripheral surface, and with an annular oil passage connected to the axial groove in its side thrust face A pair of cooling oil injection grooves each have one end connected to the annular oil passage and the other end directed to a piston while they are provided proximate to each other

Piston oil-cooling device in an engine

An engine having a connecting rod, a piston and a crankshaft is provided. The connecting rod extends between to connect the piston and the crankshaft. The connecting rod has formed therethrough at least one hole which provides a lubrication path to an interface between the connecting rod and piston conjunction point.

Connecting rod structure

In a piston-type internal combustion engine, each crankpin has a main lubrication hole in the lower half of the crankpin surface and an auxiliary lubrication hole in the leading quadrant of the crankpin surface ahead of the top-dead-centre point and axially offset with the main hole, both holes communicating with the pressurized lubrication system. The main hole communicates cyclically with a part-circumferential groove formed mainly or wholly in the lower half-shell of the associated big-end bearing and leading to a longitudinal lubricant passage in the connecting rod.

Piston cooling and/or small-end bearing lubrication arrangement for i.c.engines

A lubricating and cooling system for lubricating a connecting rod and cooling the underside of a piston of an internal combustion engine.

P Patchen

Papers

Lubrication and cooling system for connecting rod and piston