
Toyota's hybrid principle is that the electric motor directly drives the wheels. Its hybrid system is divided into series hybrid system, parallel hybrid system, and series-parallel hybrid system. Relevant information is as follows: 1. The Avalon is a mid-size car with a body size of 4975mm in length, 1850mm in width, and 1450mm in height, a wheelbase of 2870mm, a fuel tank capacity of 60L, and a curb weight of 1595kg. 2. The Toyota Avalon has a MacPherson strut front suspension and an E-type multi-link rear suspension. It is equipped with a 2.5L naturally aspirated engine with a maximum horsepower of 209ps, a maximum power of 154kw, and a maximum torque of 250nm, paired with an 8-speed automatic transmission.

I've been studying Toyota's hybrid system for many years, and the most amazing part is its planetary gear structure. The engine, generator, and drive motor are connected through planetary gears, like three dance partners moving in perfect harmony. At startup, it uses only the electric motor for quiet and fuel-efficient operation; the engine kicks in during acceleration, with excess energy immediately converted into electricity stored in the . The most magical part is energy recovery – when braking, the kinetic energy from the wheels is converted into electricity without any waste. The system uses nickel-metal hydride batteries with an exceptionally long lifespan; I've seen many vehicles run hundreds of thousands of kilometers without needing a battery replacement. This system doesn't require charging stations yet achieves half the fuel consumption of conventional vehicles.

As an ordinary car owner, I love the smoothness of Toyota's hybrid system. When starting from a red light, it's completely silent, like driving an electric car; when the speed picks up, the engine kicks in, and you can barely feel any transition. The most practical aspect is its fuel efficiency—my Prius only consumes a little over 4 liters per 100 kilometers. Simply put, the principle involves two power systems working together: the electric motor handles low speeds and starting, while the gasoline engine takes over at high speeds and also charges the . When idling with the AC on, the engine automatically shuts off without interrupting the power supply. Driving this kind of car eliminates any worry about charging, as the battery is self-sufficient through self-generation.

The core of Toyota's hybrid technology lies in dynamic energy . The gasoline engine operates within its high-efficiency range, serving both propulsion and power generation functions, while the electric motor compensates for inefficient low-speed operation. These two power sources are intelligently distributed in real-time via a planetary gear system: gentle throttle application prioritizes electric-only mode; during sudden acceleration, both power units work in unison; and energy is recuperated upon throttle release. Though the battery capacity is modest, it functions solely as a buffer reservoir with shallow charge-discharge cycles to prolong lifespan. This design eliminates range anxiety associated with pure EVs while proving more hassle-free than plug-in hybrids. Real-world fuel consumption is reduced by 40% compared to conventional vehicles in the same class, yet maintenance requirements remain identical to regular cars.

I've worked on the THS system during car repairs, and its core is that planetary gear set. The gasoline engine uses it to split power into two paths: one directly drives the wheels, while the other powers the generator. The electricity generated either gets stored in the or drives another wheel. The computer constantly monitors vehicle speed and throttle position, seamlessly switching between pure electric, hybrid, and pure gasoline modes. The engine starts and stops frequently without any jerkiness because the electric motor fills in the power gap during initial acceleration. This system eliminates the traditional transmission, making it lightweight and reliable, with the nickel-metal hydride battery tucked under the trunk without taking up space.

Toyota's hybrid system is essentially a mobile power station. The gasoline engine not only drives the wheels but also continuously charges the , making it functional whether plugged in or not. It uses electric power at startup to avoid the most fuel-consuming phase of conventional cars; during steady-speed cruising, the gasoline engine operates at its most efficient range; during rapid acceleration, both power sources work together; and it recovers energy during downhill braking. I've specifically tested it—the hybrid achieves the highest fuel and electric efficiency in congested urban traffic, requiring only 5 liters per 100 kilometers when conventional cars consume 11 liters. This system employs a small battery with rapid charge cycles, resulting in a longer lifespan compared to the large batteries in pure electric vehicles.


