Abstract:
A lubricating device comprises a cam shaft, plural cam portions for each valve provided at the cylinder head, a valve driving mechanism to change a rotational movement of the cam portion to an opening-and-closing movement of the valve via a slide member on which a peripheral surface of the cam portion slides, an oil passage of the cam shaft, a nozzle provided at either one of the cam portions to open at the peripheral surface of the cam portion and connect to the oil passage of the cam shaft, and a wall body having a recess portion. The recess portion collects lubricating oil ejected out of the nozzle and guides the lubricating oil collected to the peripheral surface of the other cam portion when the one cam portion is located in a position in which the nozzle is not directed to the slide member.
Abstract:
A tensioner for applying tension to a balancer drive chain is mounted in a balancer housing which accommodates balancer shafts. Oil is supplied from a reservoir chamber to the tensioner. An oil jet member for lubricating the balancer drive chain is mounted at a position downstream in an oil flow direction from the reservoir chamber. Therefore, while enabling foreign matter contained in the oil to be discharged from the oil jet member without being accumulated within the tensioner, a predetermined pressure can be maintained in the reservoir chamber by a resistance to the flow of oil passing through the oil jet member. Also, a constriction is provided between the reservoir chamber and the oil jet member. Therefore, it is difficult for the oil to flow out of the reservoir chamber even after stoppage of an engine, thereby supplying the oil to the tensioner upon the next start of the engine without delay. Thus, it is possible to prevent the foreign matter from entering the tensioner for the balancer drive chain.
Abstract:
In multi-cylinder opposed engine constructions provision of lubricant for lubricating bearings, for cooling cylinders, and for cooling pistons includes pumping an inlet stream of lubricant through a gallery in the engine that is in fluid communication with bearing lubricant passages and cylinder coolant passages and providing lubricant from the inlet stream of lubricant into at least one piston coolant manifold in response to a first engine operating condition.
Abstract:
An outboard engine unit includes a single lubricating oil supply tube for supplying lubricating oil to a valve-operating chain. The valve-operating chain is suspended across a drive sprocket provided to a crankshaft and a driven sprocket provided to a camshaft. A supply tube is connected to a main gallery that is linked to a main oil channel positioned in an area adjacent to the crankshaft.
Abstract:
A nozzle is adapted to direct a jet of oil under pressure on an internal combustion engine. It has a variable outlet section, and it is provided with mechanical arrangement adapted to control its outlet section on the basis of the pressure of a fluid under pressure provided to this mechanical arrangement, independently of the oil going through the outlet of the nozzle. In the lubrication system an auxiliary line is provided with first proportional means controlling oil flow toward a nozzle. A control line connects a main line or the auxiliary line, upstream of the first proportional means, to a mechanical arrangement adapted to control the outlet section of the nozzle. The control line is provided with a second proportional arrangement controlling the pressure of oil delivered to the mechanical arrangement. The nozzle can be used as a piston cooling nozzle to direct oil toward a piston of an internal combustion engine.
Abstract:
Disclosed is a lubrication structure for an engine comprising pistons 12 for slide motion in cylinders 11 of a V-type engine and lubricating means 13 and 14 for injection of oil to cool the pistons 12,the lubricating means 13 or 14 being arranged on an anti-thrust load side of each of the cylinders 11 with respect to a sliding surface for the piston 12, a notch of each of the pistons 12 required for said lubricating means and 14 being formed on the anti-thrust load side of the cylinder 11 so as to increase strength of the cylinders 11 and pistons 12.
Abstract:
The invention relates to a piston spray nozzle (12, 112) for cooling a piston (10) of a combustion engine by means of a liquid jet (20, 120) that is directed to a cooling chamber (14) of the piston (10). According to the invention, a member (16, 116) that has an approximately round cross-section and provides the discharged liquid jet (20,12) with a substantially tubular shape is disposed in the center of the discharge port (15, 115) of the piston spray nozzle (12, 112). The inventive piston spray nozzle delivers a directed, laminar liquid jet who shape remains essentially the same until the jet hits the cooling area (14).
Abstract:
A piston squirter system and method for an internal combustion engine is disclosed. The piston squirter system includes an oil reservoir, a variable displacement pump, and, for each cylinder, a piston squirter that sprays oil onto a piston for cooling and lubricating. A gallery connects the variable displacement pump to the piston squirters. The variable displacement pump receives oil from the oil reservoir and distributes the oil through the gallery to the piston squirters at a flow rate according to pressure required. The gallery does not require a relief valve and the piston squirters do not require check valves.
Abstract:
Device to feed cooling and lubricating fluid to cooling and lubricating nozzles for the pistons of an internal combustion engine, having at least one valve with an upstream channel and a downstream channel, said valve having a blocking element able to move in a compartment to block an opening of a seat. The valve responds to the pressure of the cooling fluid by opening when the upstream pressure is greater than a threshold pressure and closing when the upstream pressure is less than the threshold pressure. A means of calibrated leakage connects the upstream channel to the downstream channel in parallel with the zone of closure of the valve.
Abstract:
A motorcycle lubrication oil cooling system that cools lubrication oil without increasing the number of parts, weight, or cost, and yet is simple in construction. The cooling system is applicable to motorcycles in which an engine is cooled by a coolant pump driven by a crankshaft. The coolant pump is provided on a side face of the engine, and an oil storage chamber capable of storing a specified amount of lubrication oil is provided adjacent to the coolant pump, while a covering member is provided to cover both the oil storage chamber and a coolant pump chamber that houses the coolant pump. This abstract is neither intended to define the invention discloses in this specification nor intended to limit the scope of the invention in any way.