METHODOLOGY AND INITIAL ANALYSIS TO COMPARE HYDRAULIC HYBRID AND ELECTRIC HYBRID FOR COMMERCIAL VEHICLE

Resumo

Reducing CO2 emission and increasing the fuel efficiency of the vehicle is a major challenge for the modern automotive industry. Development of hybrid vehicles enables a manufacturer to use smaller engines and regenerative braking system helps to capture the kinetic energy of vehicle while braking to reuse it while accelerating. Since last decade, Hybrid Electric Vehicles (HEV) have provided environmentally friendly and energy efficient solution to this problem but size and cost of batteries in such systems are major issue nowadays. Recent studies have shown that Hydraulic Hybrid Vehicles (HHV) can provide cost effective, reliable and can recover more energy during braking for the commercial vehicles that makes frequent stops like city buses and delivery trucks. Hydraulic hybrid utilizes internal combustion engine in combination with hydraulic pump/motor and hydraulic accumulator to recover the kinetic energy of the vehicle during braking and releases the energy while accelerating. This paper exhibits in-depth simulation and analysis to compare the fuel efficiency and energy recovered while braking for both electric hybrid and hydraulic hybrid vehicles. Both hybrid systems were modeled and tested in vehicle simulation software. Also, an effort has been made to demonstrate the feasibility of Hydraulic Hybrid Vehicles (HHV) in today's market compared to Electric Hybrid Vehicles (EHV).