Engine oil cooling and filtering method and apparatus

Claim 2

In an engine lubricating system: first means for pumping and cooling lubricant, having an intake (11) and an output (13); an oil filter having an inlet (13) connected in the output of the first means and having a line of delivery; an engine gallery (17) connected in the filter line of delivery, establishing as back pressure thereon a gallery oil pressure; a relief valve (18) connected across the filter inlet and delivery, in communication with, and operable in response to, output pressure as a direct bypass around the oil filter; and a second valve (29) connected across the intake and output of the first means, in communication with, and operable in response to, gallery oil pressure as a direct bypass around the first means, whereby the oil filter will not be overworked.

Claim 3

Procedure for full flow cooling of engine lubricant in an appropriately pumped and drained circuit including a first means for cooling, and leading from the downstream side of the first means in a line downstream and including second filter-and-gallery means, said procedure characterized by the methodic steps of: cooling the lubricant in the first means and circulating all cooled lubricant in said line downstream; supplying to the second means all the requirements thereof for cooled lubricant in the gallery; bypassing to drain the excess of cooled lubricant above gallery requirements with the increases of bypass flow being in response to increases of the gallery pressure, thus avoiding filtering overwork; and automatically internally relieving pressure build-up across the filtering in the second means, by relief means, thus further avoiding filtering.

Claim 4

Procedure for full flow cooling of engine lubricant in an appropriately pumped and drained circuit including a first means for cooling, and leading from the downstream side of the first means in a line downstream and including second filter-and-gallery means, said procedure characterized by the methodic steps of: cooling the lubricant in the first means and circulating all cooled lubricant in said line downstream; supplying to the second means all the requirements thereof for cooled lubricant in the gallery; bypassing to drain the excess of cooled lubricant above gallery requirements with the increases of bypass flow being in response to increases of the gallery pressure, thus avoiding filtering overwork; and automatically internally relieving pressure build-up across the filtering in the second means, by relief means, thus further avoiding filtering.

Claim 5

Procedure for the full flow cooling of engine lubricant in an appropriately pumped and drained circuit, including a first means of cooling, said circuit leading from a downstream side of the first means iN a line downstream and including a filter and gallery, said procedure characterized by the methodic steps of: cooling the lubricant in the first means; circulating all cooled lubricant in said line downstream thus making available a supply flow for the gallery for its requirements plus an operable bypass flow to drain; generating a pressure signal of gallery pressure as a function of the gallery supply being adequate or in excess to gallery requirements; applying said pressure signal to bypass; operating said bypass with the applied signal in a manner to increase bypass flow with increases in gallery pressure, and vice versa, thus avoiding filtering overwork during such increases; and automatically internally relieving pressure build-up across the filtering in said filter, by relief means, thus avoiding the additional filtering during such build-up.

Claim 6

Procedure for the full flow cooling of engine lubricant in an appropriately pumped and drained circuit, including a first means of cooling, said circuit leading from a downstream side of the first means iN a line downstream and including a filter and gallery, said procedure characterized by the methodic steps of: cooling the lubricant in the first means; circulating all cooled lubricant in said line downstream thus making available a supply flow for the gallery for its requirements plus an operable bypass flow to drain; generating a pressure signal of gallery pressure as a function of the gallery supply being adequate or in excess to gallery requirements; applying said pressure signal to bypass; operating said bypass with the applied signal in a manner to increase bypass flow with increases in gallery pressure, and vice versa, thus avoiding filtering overwork during such increases; and automatically internally relieving pressure build-up across the filtering in said filter, by relief means, thus avoiding the additional filtering during such build-up.