Hybrid Gasoline Engine Step 2 - One of the main differences between a conventional engine and a hybrid gasoline engine is the absence of a serpentine belt to drive accessories usually handled by the gasoline engine.
No Serpentine Belt Step 3 - Because the hybrid engine needs coolant to circulate to cool, an electric water pump has been designed to operate on electric power.
Electric Water (Coolant) Pump
Electric Air Conditioner Compressor Step 5 - Hybrid engines utilize an electronic throttle control which is controlled by the computer similar to conventional vehicles.
Throttle Actuator Step 6 - An electric motor intergrated into the transmission serves to propel the vehicle while in electric mode. This motor also acts as the combustion engine starter and charger much like the alternator of a conventional car.
Electric Motor Cutaway Helpful Information A computer system is used to help choose which engine will be more efficient at any given time. In most cases the electric motor will start the vehicle in motion, while the gasoline engine will pick up the load at higher speeds. While in braking mode, the electric motor transforms into a charging device which is used to charge the battery system. The steering system is powered electrically unlike most conventional vehicles which utilize a pump powered by the engine.