Lubricating oil supplying system for engine
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorsHiroyuki Kidera, Toru Izumi
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Abstract
A lubricating system and method of operating the system for an internal combustion engine wherein the amount of lubricant supplied to the engine from a positive displacement engine driven pump is varied by selectively delivering lubricant from the pump to the engine or bypassing the lubricant back to the return of the pump. The amount of lubricant supplied is varied by changing both the duty ratio of the lubricant supply and the duration of engine supply in response to a map of engine conditions. Various control routines are disclosed and in each the lubricant supplied to the engine is monitored so that once a finite amount of lubricant is supplied, lubricant is not supplied again to the engine until that amount previously supplied has been consumed.
Claims70
A lubricating system for an internal combustion engine comprising a lubricant pump, lubricant control means for controlling the amount of lubricant delivered by said lubricant pump to said engine, means for sensing the running condition of the engine, means for initiating a first supply of a predetermined amount of lubricant by said lubricant control means, said predetermined amount of lubricant being determined in response to a sensed condition of said engine sensed by said sensing means .prior to the initiation of the first lubricant supply, means for continuing to sense the running condition of the engine during the first supply of the predetermined amount of lubricant to the engine, and means for changing the condition of the supply of lubricant from said lubricant control means in response to predetermined changes in the engine conditions as sensed by said sensing means after the first predetermined lubricant supply has begun.
A lubricating method for an internal combustion engine comprising a lubricant pump, lubricant control means for controlling the amount of lubricant delivered by said lubricant pump to said engine, said method comprising the steps of sensing the running condition of the engine, initiating a first supply of a predetermined amount of lubricant by said lubricant control means, said amount of lubricant being determined in response to a sensed condition of said engine sensed by said sensing means prior to the initiation of the first lubricant supply, and changing the condition of the supply of lubricant from said lubricant control means in response to predetermined changes in the engine conditions as sensed by said sensing means after the predetermined lubricant supply has begun.
Dependencies are inferred from the claim text.