Internal combustion engine with improved lubrication circuit
AssigneePiaggio & C. S.P.A.
InventorsGiuseppe Gatti, Adriano Magherini
Life of this patent
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Abstract
An internal combustion engine including a crank chamber housing a crankshaft connected to moving parts able to supply torque to the crankshaft, a lubrication circuit, an oil sump for collecting the lubricating oil, the engine including a separating partition which separates the crank chamber from the oil sump, in which the lubrication circuit includes a first oil pump and a second oil pump, where the first oil pump is fluidically connected in aspiration to the crank chamber and in delivery to the oil sump, the second oil pump being fluidly connected in aspiration to the oil sump and in delivery to the crank chamber by means of the lubrication circuit, to re-introduce pressurised oil in the crank chamber and lubricate the moving parts.
Claims12
The internal combustion engine comprising:
- a crank chamber which houses a crankshaft connected to moving parts able to supply torque to said crankshaft,
- a lubrication circuit configured to lubricate with lubricant oil said crankshaft and/or said moving parts,
- an oil sump to collect said lubricant oil,
- a separating partition which separates the crank chamber from the oil sump,
- wherein the lubrication circuit comprises a first oil pump and a second oil pump,
- wherein the first oil pump is fluidically connected in aspiration to the crank chamber and in delivery to the oil sump, the second oil pump is fluidly connected in aspiration to the oil sump and in delivery to the crank chamber by the lubrication circuit, to re-introduce the oil in the crank chamber and lubricate said moving parts,
- wherein the crank chamber comprises an oil scraper fin substantially counter-shaped with respect to a counterweight of the crankshaft so as to almost skim said counterweight.
Dependencies are inferred from the claim text.