On April 9, Mazda published a patent document describing the layout scheme of V-cylinder engine and rotary engine. This power system will be first used in Mazda MX-30, and Mazda's rotary engine is likely to play an important role in the new hybrid power system.
For a long time, the in-wheel motor will increase the unsprung load, so Mazda uses a relatively small 3.5kWh lithium-ion battery with a working voltage of 48 V.
In addition, the capacitor system can be charged through kinetic energy recovery, and then the battery can be charged through the capacitor. When the capacitor does not have enough energy to supply power to the hub motor, it is powered by the battery.
It is worth mentioning that the biggest advantage of Mazda's hybrid system is its light weight. Capacitors are lighter than batteries powered by hub motors. Moreover, the distance between the capacitor in the front wheel and the motor is short, which can reduce the use of wires and thus reduce the weight.
In order to adapt to the voltage of different systems, Mazda also uses three inverters, one of which is connected with the main drive motor between the engine and the transmission shaft.
When starting and driving at low speed, the rear-wheel internal combustion engine and the driving motor jointly drive the vehicle. When the vehicle runs at a high speed and needs a large torque driving force, the two hub motors of the front axle will also work together to form a four-wheel drive system.
In addition, the smaller rotary engine mentioned in the patent application document is suitable for hybrid power system, so the rotary engine that has disappeared from public view since 20 12 may reappear in the electrification era.
As early as 20 17, Mazda applied for an extended-range hybrid power system in the United States. The motor was arranged at the front axle, the battery pack was arranged in the middle of the chassis, and the internal combustion engine, generator, fuel tank and inverter were arranged at the rear of the car body. Among them, the patent document also contains a rotary engine.
In addition, at the 20 19 Geneva Motor Show, Ichiro Guang Lai, executive director of Mazda Powertrain Development, said that a breakthrough had been made in the electrification of rotor engines, and the system was named "XEV". ? Because the rotary engine has the advantage of small size, XEV hybrid system can integrate internal combustion engine and motor, which can not only save space, but also reduce the weight of the whole vehicle. If modularization can be realized and the universality of this system can be increased, it can be applied to all its products.
This article comes from car home, the author of the car manufacturer, and does not represent car home's position.