The principle of the supercharger of 3 kinds of marine accessories

The supercharger in the marine accessories plays an important role in the mechanical device of the marine motor, and its types are also diverse. Let me introduce its specific characteristics below.

Principle of operation: Directly use an electric motor to drive the blades to rotate and pressurize the air.

Advantages: There will be no hysteresis, and the power output is well controlled. Electricity is an energy that can be stored. It can be stored in advance when the output demand is low, or it can be obtained by regenerative braking; the energy of a mechanical supercharger cannot be stored in advance.

Disadvantages: If the amount of current is not very large and the degree of boost is limited, the self-installed electric turbocharger has almost no effect; the effective electric turbocharger requires a lot of electric energy, which depends on a specially strengthened power supply design and is powered by electricity To transmit energy, its loss will be much higher than that of a mechanical supercharger that transmits energy by a leather belt, but electrical energy is energy that can be stored.

Dual supercharger

Two superchargers are installed at the same time. Take mechanical and turbocharging systems as an example. At low speeds, mechanical supercharging is used, and at high speeds, mechanical supercharging is turned off. At this time, turbocharging can already provide enough supercharging capacity; car manufacturers are also developing and installing electric supercharging and With a turbocharged twin-turbo system, BMW has even developed a triple turbocharger.

Advantages: If you want to reduce fuel consumption by reducing engine displacement, dual supercharging can provide sufficient horsepower and better torque, especially when low speeds are most common, there will be better torque performance.

Disadvantages: The system is complicated and maintenance is not easy, so mass production is only in the near future.

Hybrid supercharger

Principle of operation: A coaxial electric motor and generator are installed on the turbocharger. At low speeds, the electric motor rotates the turbo to supercharge; at high speeds, it is converted to a generator to recover excess energy and avoid excessive intake pressure (traditional turbochargers use bypass channels to avoid excessive pressure).

Advantages: There will be no hysteresis, the power output is well controlled; the efficiency is high, at least it can be leveled with the mechanical supercharge; the small size of the supercharger can achieve the benefits of the twin turbo, and the size of the engine can be reduced at a small price , Reduce fuel consumption.

Disadvantages: A battery with a larger capacity is required to store energy, which is not yet mature.