Two-stroke motorcycle engine works

C90 motorcycle manufacturer  point movement of the piston from the bottom up dead stop, it will complete the intake and compression work process, are reciprocating The first stroke movement. Downward movement of the piston from top dead center TDC, it will complete combustion and expansion (for power) and exhaust work process, it belongs to the second piston reciprocating stroke. Taxi two wheel motorcycle  from the point when the piston is at top dead center stop movement of all closed ventilation and exhaust ports, the exhaust and ventilation process is terminated, the cylinder fresh combustible mixture will begin early in the compression. Vertical motorcycle engine While the piston moves upward, the piston below the crankcase capacity increases, so the crankcase pressure drop and form a vacuum degree, when the degree of vacuum in the crankcase to a certain extent, the reed valves automatically open, the carburetor fog of the combustible mixture is drawn into the crankcase. When the piston continues upward movement, when the top dead center to be close to issuing a spark from the spark plug, which has been compressed combustible mixture ignited. In this case the rapid expansion of burning gases, the combustion chamber temperature and pressure rise sharply, forcing the piston downward movement, i.e. as useful work by the piston rod, a crankshaft. When the piston from the TDC TDC downward movement, the crankcase pressure will increase with decreasing volume, the reed valve will gradually shut down automatically, this time into the crankcase of the combustible mixture starts to be pre-compressed . When the piston down to the exhaust port open, exhaust gases through the exhaust port to the exhaust pipe, silencer into the atmosphere. When the piston then continue down to the ventilation port is enabled, the crankcase is pre-compressed fresh combustible mixture will enter through the ventilation opening of the cylinder, and drive the exhaust gas inside the cylinder further discharge, this process is called scavenging process. This engine will complete a cycle of work.

Electric motorcycle motor speed control device

Taxi two wheel motorcycle motor speed control device is set to transform the shift and direction of the electric car , its role is to control the motor voltage or current, complete control of the motor drive torque and rotational direction.

Before electric cars on DC motor speed using the series resistance or change the motor field coil turns to achieve. Because there is a level of speed and will produce additional energy consumption or use of a motor complex structure, it has been rarely used today. Today electric and motorized tricycle wider application of thyristor chopper controlled by uniformly changing the motor terminal voltage, controlling the motor current to achieve variable speed motor . In the continuous development of power electronics technology, which is gradually replaced by other power transistor chopper speeder is. From the technology point of view, along with the application of new drive motor speed control conversion of electric vehicles for the application to DC inverter technology will become an inevitable trend.
Electric taxi tricycle in the drive to transform the motor rotation control, the DC motor contactor rely on changing the current direction of the armature or magnetic fields to achieve the motor The rotation transformation, which makes the Confucius Ha circuit complexity, low reliability. When using the AC induction motor drives, changing the motor turning magnetic field can only change the phase sequence of three-phase current, the control circuit can be simplified. In addition, the use of AC motor and frequency conversion control technology, the braking energy recovery control of electric vehicles more convenient, more simple control circuit.