Torque

In Piston Engine pressure curve is not in phase with turning moment curve. It would be much more efficient if chamber pressure is greatest around 90 degrees from TDC when the crank arm was in a more advantageous position or turning moment is at maximum in piston engine. In Anyoon Rotary Engine the rotor profile is modified for making peaks of pressure curve and turning moment as close as possible. So that we get more torque and power for same amount of fuel thus making The Anyoon Rotary Engine more efficient and pleasurable to ride.

Higher Impulsive Torque in each Power Stroke

Advantages of higher initial torque in each power stroke

As you can see in torque graph, torque at starting of power stroke is very high; 3 times more than piston engine, so most of heat energy is converted into mechanical work earlier than in piston engine. So less heat will be transferred to the surroundings compared to piston engine during power stroke. More than that expansion ratio is decreased without changing compression ratio (exhaust volume is higher than intake volume) more heat will be converted to work which is not possible in piston or Wankel engine.

Description

Impulsive torque is calculated for expansion phase of the Otto cycle. Here “fθ” is calculated first and then multiplied with “r”. “fθ” for new invention, piston and Wankel engine is shown here in the Diagrams Below. Since maximum torque (for each power stroke) is 2 to 3 times higher the driver gets better response from engine in the entire rpm range. Higher torque means better ability to accelerate rotating things. In piston engine the piston starts moving slowly from TDC as gases pushes. Even though force on the piston is large the torque is less at shaft, end result is less thermal energy is converted to mechanical energy. But in rotary engine torque is 2 to 3 times higher initially so thermal energy is converted into mechanical energy faster and earlier so less thermal energy is lost to the surroundings.

In terms of kinetic theory of gases, the molecule hits at the walls and reflects back. If the wall is able to move freely the molecule transfers its kinetic energy to wall, if wall does not move at all (cylinder wall) the molecule retains its kinetic energy (assuming elastic). In practice loss of energy due to impact in second case will be higher. Since the in my engine produce more torque for same pressure of gases than in piston engine. The wall of rotor can move more easily (Assuming same load is connected to the shaft).and thus more thermal energy is converted to

mechanical energy and converted faster. (I mean at higher temperature, when molecules are moving faster). Keep in mind that the engine should run at some speed during its operation. So molecules are hitting moving walls (virtually in case of piston engine (even though piston is moving slowly from TDC the crank is rotating at some angular velocity) The effective force on walls is the difference between the molecules velocity and wall. So converting Thermal energy into mechanical energy earlier (I mean when temp is higher (when molecules move faster) has definite advantage. (Maximum torque can be varied easily by changing the shape of rotors 1/4th profile at the exhaust side).

Another thing to mention is that the thermal energy is also lost to surroundings during power stroke. So converting thermal energy to mechanical energy faster also reduces loss of thermal energy to surroundings.