The Cramer-Klett Engine

Crankshaft Details

These pictures show the cam and the governor gear. Note that the governor is not geared up, but rotates basically in sync with the flywheel.

Working Piston

Contrary to the Ericsson design, this engine has four admission valves in the working piston. The guides are modified too. The kinematics however are unchanged.

Although invisible from the outside, the packing ring (item c4 in the patent text) is there as well as the domed supply piston.

Another difference is the water jacket aound the firebox.
 

Flywheel Crank

The flywheel is dynamically balanced, see partially filled rim in the picture to the left. In the static (stopped) state there is a considerable imbalance, which is used to start the engine: Pumping the lever to the right of the engine, the wheel can be turned easily to the upper dead center, where the maximum heat is stored inside the displacer piston. From there on the gravity turns the engine through half a cycle, up the point where the heat meanwhile stored in the displacer is passed back to the new load of air.