Furthermore, the shared crank pin is split and has 28?phase offset, resulting in 256?104?256?104?firing spacing, which is irregular within a 360?crankshaft rotation but evenly distributed from one rotation to another.
32.
The " split " in this case is referring to the difference in phase between piston pairs in " opposite " banks that would normally share a crank pin in a four-stroke engine.
33.
Honda Honda C engines that evolved from not having a balancer to the 3.5 liter version with a balance shaft ) are dedicated designs with 30?offset crank pins that result in even combustion spacing.
34.
In the V6 with 90?between cylinders, split crank pins are required to offset the connecting rods by 30?to achieve an even 120?between firing intervals, and crankshaft counterweights are required to offset the primary imbalances.
35.
Compared to 60?V6, the offset crank pins could have overlap in the diameter of the pin, and the V angle coincides with the angle of mean directions of conrods swinging left and right in each bank.
36.
Lubrication of the cylinders and piston valves was by means of a Ritter six-piston oil press, which was arranged in the cab at the right hand side of the engine and actuated from the trailing crank pin.
37.
The combination of a 90?V-angle with only three crank pins set at 120?apart, with opposing cylinders sharing a crank pin as most V8 engines do the cylinders fired alternatively at 90 and 150?of crankshaft rotation.
38.
For example, a crankshaft for an inline six engine will be described as " three bearing " or " four bearing " depending on its number of main bearings; The crank pins are not counted in this description.
39.
Increasing the number of bearings in an engine will generally increase the size and cost of the engine, but also provides stability to the crankshaft, which would otherwise have to endure greater bending moments from having the crank pin further from a bearing.
40.
To further assist with keeping within the permissible weight limits, the cab was of welded construction and all footplates and running boards were made of duralumin, while the axles and crank pins of the coupled wheels were hollow and the connecting rods were of special high tensile steel.
