Engine lubrication control

An internal combustion engine comprising a cylinder body defining at least one cylinder bore in which a piston reciprocates, said cylinder bore having a closed end and an open end, said closed end defining with said piston and said cylinder bore a combustion chamber, a crankcase adjoining said cylinder block and defining a crankcase chamber with said open end, said crankcase chamber accommodating a crankshaft pivotally coupled to said piston and rotating within the crankcase, an air intake system supplying an air charge to said combustion chamber, said air intake system including a throttle valve controlling an amount of the air charge, said engine further comprising a lubrication pump delivering lubricant to said crankcase chamber, said lubrication pump including a rotary member which changes an amount of lubricant flow through the lubrication pump when the rotary member is rotated, a control lever linked with said throttle valve and selectively mounted on said rotary member at least in two positions, and a switchover mechanism changing said position of said control lever relative to said rotary member.

An internal combustion engine comprising a cylinder body defining at least one cylinder bore in which a piston reciprocates, said cylinder bore having a closed end, said closed end defining with said piston and said cylinder bore a combustion chamber, an air induction device supplying a volume of air to said combustion chamber, means for adjusting the volume of air, a lubrication device delivering a volume of lubricant to a portion of said engine in an amount corresponding to the volume of air adjusted by said means for adjusting the volume of air, and means for adjusting the volume of lubricant delivered to the portion of said engine at a particular volume of air go as to increase the amount of lubricant delivered to the portion of said engine during a break-in period of the engine and to decrease the amount of lubricant delivered to the portion of said engine after the break-in period, wherein the means for adjusting the volume of lubricant comprises a mechanical connection between the means for adjusting the volume of air and the lubrication device.

An internal combustion engine comprising a cylinder body defining a cylinder bore, a piston reciprocating within the cylinder bore, a cylinder head defining a combustion chamber together with the piston and the cylinder bore, an air induction system supplying air to the combustion chamber, the air induction system including a throttle valve arranged to control an amount of the air, a lubrication pump arranged to deliver lubricant to a portion of the engine, the lubrication pump including a rotary member arranged to change an amount of the lubricant, a control lever linked with the throttle valve and selectively mounted on the rotary member at least in two positions, and a switchover mechanism arranged to change the positions of the control lever relative to the rotary member.

An internal combustion engine comprising a cylinder body defining a cylinder bore, a piston reciprocating within the cylinder bore, a cylinder head defining a combustion chamber together with the cylinder bore and the piston, a lubricant pump arranged to deliver a volume of lubricant to a portion of the engine, an air induction device supplying a volume of air to said combustion chamber, said air induction device including an air amount measurement section to measure the volume of air, and a lubricant pump delivering a volume of lubricant to a portion of the engine, the lubricant pump including a pumping section and a control section arranged to control the pumping section so that the volume of lubricant is measured in an amount corresponding to a position of the air induction device, and a user selectable change mechanism arranged to change the control section at least between first and second states, wherein the control section controls the pumping section to deliver a first volume of lubricant at a particular volume of air in the first state, and the control section controls the pumping section to deliver a second larger volume of lubricant at the same particular volume of air in the second state.

An internal combustion engine comprising an engine body, a member moveable relative to the engine body, the engine body and the moveable member together defining a combustion chamber, an air intake system arranged to supply air to the combustion chamber, the air intake system including an air amount control unit, and a lubrication system arranged to deliver lubricant to the engine body, the lubrication system including a moveable adjustment member arranged to adjust an amount of the lubricant when moved, a control member linked with the air amount control unit and selectively engaging with the adjustment member at least in two positions, and a changeover mechanism arranged to change the positions of the control member relative to the adjustment member.