Hybrid Electric Vehicle (HEV)

The Hybrid Electric Vehicle (HEV) uses hybrid power source (Engine, Electric motor), so its fuel efficiency is relatively high and exhaust emission is very small compared to the traditional vehicle which uses only engine as power source. It consists of the engine, motor, high voltage battery and control modules.

In Electric Vehicle (EV) mode, the HEV is driven by only the electric motor, but engine supports the motor in case the vehicle needs more power (HEV Mode).

The electric motor not only drives the vehicle but also generates electric energy during regenerative braking for charging the high voltage battery.

[HEV Operation Mode and Power Flow] 

Fig 1: HEV Operation Mode And Power Flow Diagram

Courtesy of HYUNDAI MOTOR AMERICA

[Warning Lamp] 

Fig 2: Identifying Warning Lamp

Courtesy of HYUNDAI MOTOR AMERICAHYUNDAI MOTOR AMERICAHYUNDAI MOTOR AMERICAHYUNDAI MOTOR AMERICAHYUNDAI MOTOR AMERICA

Item	Description	Related Control Module
1. MIL Lamp Courtesy of HYUNDAI MOTOR AMERICA	Lamp ON: Engine Management System (EMS) fault	ECM
2. Service Lamp Courtesy of HYUNDAI MOTOR AMERICA	Lamp ON: Hybrid related system fault	HCU, MCU, BMS ECU, LDC, TDC, OPU
3. READY Lamp Courtesy of HYUNDAI MOTOR AMERICA	After ignition START Lamp ON: HEV in normal condition is ready to drive (Engine may or may not start) Lamp OFF: HEV is not ready to drive During driving Lamp Blinking: HEV in faulty condition (HEV in limited operating mode) Lamp OFF: HEV is not ready to drive	HCU
4. EV MODE Lamp Courtesy of HYUNDAI MOTOR AMERICA	Lamp ON: EV mode (Electric motor only) Lamp OFF: HEV mode (Engine running)	HCU