Patent Application
20210324790
Electric cars are getting more popular, but the challenge is the charging capacity and availability of charging options everywhere. For longer range electric cars, higher capacity battery is required whereas generally people travel long distances once in a week or month. So, for city travel also they need to have higher range cars hence higher cost. Also, electric cars are not practical solutions in remote areas or military vehicles where availability of electric charge is a problem.
This invention is around a compact single unit fuel engine and electric engine. To make this engine compact a Rotary engine with extended eccentric shaft having inbuilt electric rotor is used. So, customer need not to have high capacity batteries. They have capacity of City range and can use fuel engine when travelling far. Also, both the engines can be operated independently and together in order to achieve high power or efficiency based on need.
Other hybrid engines use piston engines which makes the engine heavy, costly and bulky. Whereas current invention makes the unit compact and less costly.
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This compact integrated engine will have a single extended eccentric shaft used in Rotary engine and will host the rotor of the AC motor as well, it is the key component of this design. Housing of both engine and motor will be bolted together after doing necessary component assembly. RPM feed from the Engine will be passed to the CPU in order to control the frequency of current passed to the motor, hence making the RPM of the electric motor in sync. Below is the detailed description of each component.
Any unit can be started independently as well as together.
To start the Fuel engine independently electric motor will be started, which will act as a starter to engine. Engine will get started while taking fuel from fuel pump and doing combustion with the spark plugs. After initial start current will not be passed to motor which will make only fuel engine running.
To run both the unit together CPU will keep passing the current to electric motor by making the RPM in sync at both sides with the help of RPM sensor while controlling the frequency of current accordingly.
To start motor independently, current will be passed to electric motor, but fuel pump will remain off and there will not be any current passed to spark plugs. This will make electric motor run independently.
It can act as a pure electric engine in urban areas where charging is available easily and fuel engine in remote areas. By doing so, high capacity batteries will not be required which is a major cost in any electric car.
It can produce high starting torque and power while having both the engines on and once accelerated one engine can be switched off. This function can be controlled by the CPU based on user setup.
Unlike piston engines, Rotary engines have 3 power strokes in one rotation which make them more powerful. So, this combination of Electric and Rotary engine gives high power while keeping the unit compact and enabling the option to choose efficiency.
As electric motor is inbuild in the unit so no need to have a starter as electric motor can perform that function too. Hence reducing the size and weight of unit.
