RKM Engine - Comparison To The Wankel Engine

Comparison To The Wankel Engine

Despite their apparent geometrical similarity, the RKM and the Wankel engine are quite different in design. The main similarities between them are the shape of the working chamber and the use of rotary motion.

However, there are many differences between the two. The Wankel engine working chamber is mobile while the RKM chamber is stationary. The axis of rotation in the Wankel engine moves in a circle while that of the RKM is fixed (in the single power shaft version, temporarily with two possible positions). In the RKM motor, the ignition takes place in a compact recess, while the Wankel's is in the work chamber itself. The RKM's sealing elements are in surface contact with the work chamber and pistons, as opposed to the Wankel's line contact. This makes for a number of advantages of the RKM motor over the Wankel:

  1. Easier adaptation to diesel fuel.
  2. Support of forced afterburning of gases, which is not feasible with the Wankel geometry.
  3. Longer life, lower fuel consumption and higher efficiency.

One application that the two may indeed have in common is miniaturization. A miniature Wankel engine has been successfully constructed, and it stands to reason that the same can be done for an RKM.

Although developed in the 1960s, today there are no runnable RKM engine demonstrated.

Read more about this topic:  RKM Engine

Famous quotes containing the words comparison to the, comparison and/or engine:

    “In comparison to the French Revolution, the American Revolution has come to seem a parochial and rather dull event. This, despite the fact that the American Revolution was successful—realizing the purposes of the revolutionaries and establishing a durable political regime—while the French Revolution was a resounding failure, devouring its own children and leading to an imperial despotism, followed by an eventual restoration of the monarchy.”
    —Irving Kristol (b. 1920)

    “Away with the cant of “Measures, not men!”Mthe idle supposition that it is the harness and not the horses that draw the chariot along. No, Sir, if the comparison must be made, if the distinction must be taken, men are everything, measures comparatively nothing.”
    —George Canning (1770–1827)

    “There is a small steam engine in his brain which not only sets the cerebral mass in motion, but keeps the owner in hot water.”
    —Unknown. New York Weekly Mirror (July 5, 1845)