Toyota THS hybrid power system
Toyota's hybrid technology is called THS for short. This THS hybrid technology should be mature by now. Toyota recently issued a patent for the core part of THS hybrid technology, and * * * enjoyed this hybrid vehicle technology that has dominated for more than 20 years.
So how does Toyota's THS hybrid technology realize the hybrid of oil and electricity? Toyota's THS hybrid power technology uses two motors, with the engine as the output power, and adjusts the output power of the internal combustion engine and the motors through complex and ingenious planetary gear mechanisms, so that the internal combustion engine always stays in an efficient working range. When the vehicle is started, it is driven by the motor, which avoids the inefficient working area of the traditional internal combustion engine; When the vehicle is driving under low load conditions such as cruising, the internal combustion engine works and the motor is stationary; When accelerating, the motor assists the internal combustion engine to work, saving fuel and obviously improving the driving experience; When the vehicle slows down, the motor can reverse charge the battery through kinetic energy recovery.
Because Toyota's THS hybrid power uses planetary gear mechanism, it is impossible to completely disconnect the motor when the engine is working. Therefore, when working in an internal combustion engine, the internal combustion engine must always work with the motor to charge the battery. If the thermal efficiency of the engine itself is not high enough, it will obviously weaken the fuel-saving ability of this hybrid system, so Toyota's THS hybrid system is mainly based on internal combustion engine, and the motor plays an auxiliary role.
Honda i-MMD hybrid power system
Due to the patent protection of Toyota hybrid planetary gear mechanism in previous years, the research and development of Honda hybrid power system has had a certain impact. Honda's i-MMD hybrid system completely bypasses Toyota's hybrid planetary gear mechanism, adopts PCU electronic module control, and adds a set of clutch to realize the coordination between motor and internal combustion engine. Its overall power output idea is consistent with Toyota's hybrid, which is to make the internal combustion engine work in the most efficient working range as much as possible.
When the vehicle is started, it is completely driven by the motor; When driving at medium and low speed, the internal combustion engine charges the battery and the motor drives the vehicle; When driving at high speed, Honda's i-MMD hybrid system has a direct connection mode of internal combustion engine, which allows the internal combustion engine to directly drive the vehicle forward. At the same time, PCU will be more able to decide whether to let the motor participate in the work or use the power of internal combustion engine to charge the battery. Generally speaking, Honda's i-MMD hybrid system is more inclined to motor vehicles.
Byd DM-i hybrid power system
BYD's DM-i hybrid system has three motors, one of which is connected with the belt of the internal combustion engine, which is mainly responsible for the start-up and auxiliary afterburner when the internal combustion engine works. The other two motors are located at the front axle and the rear axle respectively, which directly drive the front and rear wheels of the vehicle. The internal combustion engine drives the front axle, so when the internal combustion engine works, the excess power can be reversed by the motor of the front axle to charge the power battery.
BYD's DM-i hybrid system is similar to Toyota's and Honda's hybrid systems, both of which are aimed at reducing the start of internal combustion engines as much as possible or making internal combustion engines work as efficiently as possible. The vehicle will travel in the best power distribution mode according to the current driving state and vehicle condition.
Moreover, the biggest difference between BYD's DM-i hybrid system and Toyota and Honda's hybrid system is that it can directly charge the power battery with an external power supply, and it is more inclined to the motor-driven vehicle form.
Generally speaking, who is the strongest?
The similarity of the three sets of hybrid power systems is that they all take energy saving as the main purpose and drive vehicles forward through different hybrid power modes. Toyota THS hybrid power system is mature and stable, mainly driven by internal combustion engine. Honda's i-MMD hybrid system is radical, which solves the hybrid problem in a simple and rude way, with large motor power and battery capacity. BYD's DM-i hybrid system can directly charge the power battery with an external power supply. At the same time, good hybrid power output and flexible power distribution are advantages. In terms of stability and reliability, I personally think that Toyota hybrid will be better. Moreover, GAC Toyota's hybrid models also have a battery-free policy, which solves the worries of consumers.