Increasingly stringent environmental regulations have allowed major car companies to show their magic. Small-displacement three-cylinder turbos, strong hybrids, light hybrids, plug-in hybrids, and pure electric vehicles are blooming. If you ask about non-plug-in hybrids, you Which car companies can you think of? As representatives of hybrid power, Toyota THS and Honda iMMD are definitely on the top. Through this article, the editor will come to share with you the "Randa" hybrid technology.
Honda’s iMMD hybrid system has been developed to the third generation, equipped with a 2.0-liter Atkinson gasoline engine, with a drive motor and a power generation/starter motor. It is equipped with the world's first rare earth-free permanent magnet drive motor. It does not require a traditional gearbox. The engine and motor are coordinated through the PCU power control unit. The thermal efficiency reaches 40.6%, which is 1.1% higher than the previous generation. It is the current Honda thermal efficiency The highest power system.
Honda’s iMMD intelligent multi-mode drive system consists of a high-efficiency engine, an E-CVT with integrated dual motors, a power control unit PCU, and a high-efficiency lithium battery, driven by two motors, enabling high-speed cruises The engine can output smoothly and economically, and the engine can start and stop silently. During the middle and high speed cruising period, the clutch is engaged, and the engine directly drives the wheels in the optimal speed range. At any time, when the driving motor is driven or the kinetic energy is recovered, the clutch will be disengaged to reduce mechanical friction and avoid efficiency loss. In addition, the kinetic energy recovery integrates four-stage brake recovery paddles, which can adjust the brake recovery performance level to further improve fuel economy. The electronic accelerator controls the sensitivity of the accelerator by monitoring the accelerator pedal depth, throttle opening, engine speed and vehicle speed to meet the owner's control expectations. Reduced vehicle weight and simplified the layout of the engine room, while maintaining power, the throttle response is more rapid and accurate.
Toyota THS Ⅱ hybrid power system is equipped with a 2.5L inline four-cylinder engine with a compression ratio of 14:1 and an engine efficiency of up to 41%. The two motors of the new generation of E-CVT are changed from the previous coaxial arrangement to the parallel arrangement, and the power transmission loss of the system is reduced by about 20%. The overall fuel consumption of the equipped model is 4.1L.
Toyota THS is a very mature gasoline-electric hybrid technology, which was used in mass-produced Prius models as early as 1997. This system consists of two motors, a planetary gear, and a clutch. The motor on the side close to the engine is smaller and is called the MG1 motor. MG1 is mainly used for power generation, and the far MG2 is mainly used for driving. Of course, when decelerating, the high-power MG2 motor can also act as a generator to recover braking energy.
Toyota THS realizes hybrid power generation through speed coupling, so the engine speed can be kept at the required speed at all times. High-speed output can be achieved during low-speed acceleration, and low-speed operation can reduce fuel consumption during high-speed cruising. No matter which speed is used, the engine can allocate part of the power to generate electricity and part of the power to drive the vehicle. This is exactly the advantage of Toyota's speed coupling system.
Honda is a high-power motor with a low-power fuel engine, while Toyota is a power combination of a high-power fuel engine with a low-power motor. Most of the daily working conditions of iMMD are series mode, that is, the motor directly drives the vehicle; and THS, because of the structure of the planetary gear, is more in parallel mode, that is, the motor and the fuel engine simultaneously drive the vehicle.
Considering that Toyota's THS was born earlier, it has established a great advantage in sales so far. Needless to say, the maturity level naturally has a good market advantage; and Honda iMMD has experienced Three generations of development, coupled with a motor drive with up to 135kW power, also has a good performance in power. Under the condition of fuel consumption similar to Toyota THS, it has stronger performance, better driving experience, lower price, and A more futuristic form of power, I believe that after the test of the market, there will be good sales performance.
