Crankshaft and piston arrangement

A crankshaft and piston arrangement for a combustion engine, comprising a piston pivotally connected to a crankshaft by a connecting rod, and balance means comprising a connecting rod and a balance arm pivotally connected thereto, the balance arm being connectable at an end remote from the balance means connecting rod to the engine and wherein the balance arm provides a balance mass, and the balance means is provided on the same side of the crankshaft as the piston.

A crankshaft and piston arrangement for a combustion engine, comprising a first piston pivotally connected to a crankshaft by a connecting rod, and a first balance means comprising a connecting rod and a balance arm pivotally connected thereto, the balance arm being connectable at an end remote from the balance means connecting rod to the engine and wherein the balance arm provides a balance mass, and the balance means is substantially diametrically opposed to the first piston and piston connecting rod,

• the crankshaft and piston arrangement further comprising a second piston and a second balance means,
• wherein the crankshaft comprises in axial order the first piston, the first and second balance means, and the second piston arranged along the crankshaft,
• wherein each of the pistons and balance means is separated from a neighboring piston and balance means by a crank web to which each is pivotally connected by a bearing.

A crankshaft and piston arrangement for a combustion engine, comprising first and second parallel pistons each pivotally connected to a crankshaft by a connecting rod and bearing, and balance means for each piston and each comprising a connecting rod and a balance arm pivotally connected thereto, each balance arm being connectable at an end remote from its respective balance means connecting rod to the engine and wherein each balance arm provides a balance mass, and each balance means is substantially diametrically opposed to its respective piston and piston connecting rod,

• wherein the crankshaft comprises in axial order the first piston, two balance means and the second piston arranged along the crankshaft,
• wherein each of the pistons and balance means is separated from a neighboring piston and balance means by a crank web to which each is pivotally connected
• wherein the balance arms extend in substantially opposite directions to one another away from their respective connecting rods.

A crankshaft and piston arrangement for a combustion engine, comprising first and second pistons each pivotally connected to a crankshaft by a connecting rod, and first and second balance means each comprising a connecting rod and a balance arm pivotally connected thereto, each balance arm being connectable at an end remote from its respective balance means connecting rod to the engine and wherein each balance arm provides a balance mass, and each balance means is substantially diametrically opposed to a piston and piston connecting rod,

• said crankshaft and piston arrangement further comprising a central main bearing disposed centrally along the axis of the crankshaft substantially symmetrically between two pairs each comprising one of the pistons and one of the balance means.

A crankshaft and piston arrangement for combustion engines comprising two pistons each pivotally connected to a crankshaft by an associated connecting rod, and a pair of balance means comprising a guided balance mass to reduce the vibrations created by movement of the pistons in use, the crankshaft further comprising a central main bearing disposed axially between the two pistons and between a pair of balance means.

An engine having a crankshaft and piston arrangement for combustion engines comprising a piston pivotally connected to a crankshaft by a connecting rod and balance means comprising a balance mass pivotally connected to the crankshaft and a guide link pivotally connected to the balance mass and connectable at an end remote from the balance mass to a fixed point on the engine, wherein the guide link for the balance means is connected to the engine on the same side of the crankshaft as the piston and the balance means is disposed between the piston and crankshaft.

A crankshaft and piston arrangement for a combustion engine, comprising a piston pivotally connected to a crankshaft by a connecting rod and balance means comprising a connecting rod and a balance arm pivotally connected to the balance means connecting rod, the balance arm being connectable at an end remote from the balance means connecting rod to the engine, and wherein the balance arm provides a balance mass and the balance means is provided on the same side of the crankshaft as the piston, wherein when a piston is radially outermost, an angle is presented in the associated balance means between the central axis of the piston and the longitudinal axis of the balance arm which is in the range of 50°-75°.

A crankshaft and piston arrangement for a combustion engine comprising a piston pivotally connected to a crankshaft by a connecting rod and balance means comprising a connecting rod and a balance arm pivotally connected to the balance means connecting rod, the balance arm being connectable at an end remote from the balance means connecting rod to the engine, and wherein the balance arm provides a balance mass and the balance means is provided on the same side of the crankshaft as the piston,

• said crankshaft and piston arrangement comprising two parallel pistons each connected by a connecting rod and bearing to the crankshaft and a balance means for each piston, wherein the balance arms extend in substantially opposite directions to one another away from their respective connecting rods, the axes of the connecting rods are angularly displaced with respect to one another, wherein the degree of angular displacement is in the order of 3° when the pistons are radially outermost.

A crankshaft and piston arrangement for a combustion engine, comprising a piston pivotally connected to a crankshaft by a connecting rod and balance means comprising a connecting rod and a balance arm pivotally connected to the balance means connecting rod, the balance arm being connectable at an end remote from the balance means connecting rod to the engine, and wherein the balance arm provides a balance mass and the balance means is provided on the same side of the crankshaft as the piston, wherein when a piston is radially outermost, an angle is presented in the associated balance means between the central axis of the piston and the longitudinal axis of the balance arm which is in the order of 90°.

A crankshaft and piston arrangement for a combustion engine, comprising a piston pivotally connected to a crankshaft by a connecting rod and balance means comprising a connecting rod and a balance arm pivotally connected thereto, the balance arm being connectable at an end remote from the balance means connecting rod to the engine and wherein the balance arm provides a balance mass and the balance means is provided on the same side of the crankshaft as the piston.