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Video Cylinder - Crank Drive
Video Piston 1
Video Piston 2
Video Piston 3
Video Piston 4
Video Piston - history
Video Piston - in general
Video Piston - material
Video Piston - stress
Video Piston - dimensions
Video Piston - measuring
Video Piston - truck
Video Piston Pin
Video Piston Pin Offset
Video Piston Rings 1
Video Piston Rings 2
Video Piston Rings 3
Video Connecting Rod
Video Crankshaft-history
Video Crankshaft 1
Video Crankshaft 2
Video Crankshaft 3
Video Crankshaft 4
Video Crankshaft 5
Video V-2 Crankshaft 6
Video Crankshaft 7
Video Bearing Play Check
Video Forces crank mechanism
Video Rot. Vibration Damper
Video Equaliser Shafts 1
Video Equaliser Shafts 2
Video 5-cyl. Block
Video Fly Wheel
Video Cylinder Block 1
Video Cylinder Block 2
Video Cylinder Block 3
Video Cylinder Block 4
Video Cylinder Block 5
Video Cylinder Block 6
Video Measurements
Video Loop Scavenging
Video Classic Racing Engine
Video V8 Cylinder Block
Video V8 Crankshaft 1
Video V8 Crankshaft 2
Video V10 Cylinder Block
Video V12 Cylinder Block
Video W12 Cylinder Block
Video W8 Cylinder Block

Video CO2-Emissions
Video Torque
Video Gas Speed
Video Hollow Cylinder
Video Bore Stroke Ratio
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Video Calc. Crank Mechan.
Video Pistin Force
Video Compression Ratio
Video Pistin Speed
Video Power (output)
Video Power (piston pressure)

Video Multi-cylinder engine 1
Video Multi-cylinder engine 10

          A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Crankshaft Roller Bearing

Roller bearings result in less operative dissipation

Actually, the four-stroke engine (almost) always features sliding bearings. If only it would be possible to insert roller bearings into a four cylinder in-line engine! It is a pity that one cannot provide the ease of the rotation through an Internet site. One would understand immediately how much friction power and thus energy is saved.

The same lubrication like with sliding bearings

The figure shows half a roller bearing cage. They are inserted with accordingly prepared bearing like the half shells of the sliding bearing. The external half shell is inserted into the case with its rollers, without twisting. The large edge is striking. It is calculated to achieve a short distance to the crankshaft, so that the oil does not flow out in large quantities sideways out of the bearing. Also, the other lubricating points should be supplied with oil through inside borings.All together it (still) is not a project for large series, but the engine already managed quite a few test runs.

Roller bearings in four-stroke engines have a certain tradition

In the history of the car there have been four-stroke engines with pressure circulation lubrication and roller bearings, e.g., the Porsche 356 and the Citroen 2 CV, here, however, with completely factory-mounted bearing. Because undivided roller bearings can be mounted only if big-end bearings and crank webs can be separated and pressed together again in the same position. 06/07               Top of page               Index
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Translator: Don Leslie - Email:

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