CURSO COCHES HÍBRIDOS UD2 TIPOS DE HÍBRIDOS

Types of Hybrid Vehicles and Their Technologies

Overview of Hybrid Vehicle Types

• The course focuses on hybrid vehicles, specifically discussing types and technologies used, including series hybrids, parallel hybrids, and series-parallel hybrids.

• It is recommended (but not mandatory) to acquire the book "Hybrid Vehicles: Technology and Operation," available on Amazon and Escola Técnica del Valles.

Series Hybrids

• Key components of series hybrids include a traction system with an electric motor generator, transmission system, thermal engine, current generator, fuel tank for the thermal engine, high-voltage battery, and charging port.

• In some models, the vehicle is solely powered by the electric motor. The inverter converts DC from the battery to AC for the motor; during deceleration or braking, it acts as a generator to recharge the battery.

• The first series hybrid was the Chevrolet Volt featuring a thermal engine paired with an electric motor and high-voltage battery.

• Other examples include BMW i3 REx (range extender), Nissan e-Power (with 1.5L engine), and Audi RS e-tron (with dual electric motors).

Parallel Hybrids

• Essential components in parallel hybrids consist of a traction system with both thermal engines and electric motors working together through an automatic transmission.

• Typically at low speeds or startup, the electric motor propels the vehicle; at higher speeds or during acceleration, both engines can operate simultaneously for maximum power output.

• Energy conversion occurs via an inverter that transforms DC from batteries into AC for motors; regenerative braking allows energy recovery to recharge batteries.

• The Honda Civic was one of the first parallel hybrids using a 1.3L DSI VTEC engine; modern versions utilize separate motors/generators integrated within their power units.

Conclusion

Understanding Hybrid Vehicles: Series and Parallel Systems

Overview of Hybrid Vehicle Operation

• Hybrid vehicles can operate in 100% electric mode at low speeds, while thermal engines are used for higher power demands. Regenerative braking is employed during deceleration to recharge the battery.

• Key components of Toyota's parallel series hybrids include a thermal engine, fuel tank, independent electric motor, and generator. The electric motor drives the vehicle and recharges during stops.

• Modern hybrids utilize lithium-ion batteries instead of nickel-metal hydride. The system starts with the electric motor; if more power is needed, the thermal engine engages.

Functionality of Toyota's Hybrid System

• The hybrid system consists of a thermal engine, generator, planetary gear system (transaxle), inverter converter, and high-voltage battery. The vehicle starts with the electric motor powered by the battery.

• During normal acceleration, the thermal engine assists the electric motor to drive the wheels. In strong acceleration phases, both motors work together for maximum power output.

• In deceleration phases, the electric motor acts as a generator to recharge the battery while allowing the thermal engine to remain off or idle without consuming fuel.

Types of Hybrids: Series vs Parallel

• Series hybrids have no direct connection between the thermal engine and wheels; they only generate electricity through a generator that charges the battery. The electric motor always propels the vehicle.

• Plug-in hybrids feature larger batteries charged from an external source, enhancing speed and range in all-electric mode compared to traditional hybrids that rely on combustion engines primarily.

Distinctions Among Hybrid Configurations

• Early parallel hybrids integrated both an electric motor and generator into one component but allowed direct access for combustion engines to engage with transmission systems.

• In these configurations, charging occurs only during braking or deceleration since combined operation isn't possible—either generating or driving but not both simultaneously.

• Parallel series hybrids combine independent motors and generators within a planetary gear system (transaxle), allowing both types of engines to propel vehicles effectively while also enabling energy recovery during braking.

Conclusion & Further Study

• Understanding these hybrid systems is crucial for grasping their operational efficiencies. For deeper insights into hybrid vehicle technology and functioning principles, refer to "Vehículos Híbridos: Tecnología y Funcionamiento," available on Amazon and Escuela Técnica del Vallés website.