Piston Octagonal in Deformable Controlled Geometry (POGDC)

[Remundo]

Expenses n ° 3



Expenses n ° 4



Next time we’ll focus on the MPRBC rotary pistons RdM

[Remundo]

Case study on rotary pistons of MPRBC machines

The pistons of MPRBC machines are subjected to pure bending. Below the answer for 100 Bar pressure


There is a concentration of stresses at the level of the piston neck. This remains below the elastic limit of the steel. It would be easy by redrawing the profile to significantly reduce this maximum stress.

[Remundo]

Case study for the peripheral slide housing (CPG) of a POGDC

Expenses n ° 1



Expenses n ° 2

[jam]

Hi Remundo,

What noise is anticipated for these machines running at 4000 rpm?

[Remundo]

Hi Jam,

No idea about noise. it also depends a lot on the exhaust line.

Given the intrinsic balancing of the motor, one can think that these motors cause less vibrational noise.

At equal power, there will be no more combustion (even slightly less) than for a conventional engine, so not really more noise.

Here are some things to think about.

[Remundo]

Case study for the 8 pins making the pivots between connecting rods (BA, BB, BC, BD) and piston heads (TPA, TPB, TPC, TPD)

Pins with 4 seals



Tomorrow, the 6-joint pin.

[Remundo]

Pins with 6 seals



Note: it is a summary modeling resulting from the theory of the beams, without taking into account the rigidity of the connecting rods and the heads of pistons (the computed stresses thus increase the real stresses).

Nevertheless, the stresses remain well below the elastic limit, in particular if the number of joints is increased (because this limits bending).

Next time, presentation of deformations / stresses of the MPRBC housing.

[Remundo]

MPRBC case study

Expenses n ° 1



Expenses n ° 2

[Remundo]

Loads 3



Loads 4


The small sky-blue dots represent supposedly rigid screws. Their density is variable along the circumference of the casing to simulate different cases at the same time

[Remundo]

Dear econologists ...

After this very complete overview of POGDC ...

How about a little history of the genesis of POGDC and MPRBC, since December 2002?