This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Energy Efficiency of Vehicles with Combined Electromechanical Drive of Driving Wheels
ISSN: 0148-7191, e-ISSN: 2688-3627
To be published on September 15, 2020 by SAE International in United States
The use of a combined electromechanical drive of vehicle driving wheels will allow to realize the possibilities of a continuously variable transmission. In this case, the use of various differential mechanisms that summarize the movement from the internal combustion engine (ICE) and the electric motor will reduce the unevenness in time of the traction force to the drive wheels. Increasing the energy efficiency of hybrid cars is also possible by ensuring the engine runs at a constant high-speed mode. This article presents the results of evaluating the reduction of energy losses during acceleration of the vehicle and engine operation at a constant speed. Energy savings are 4-6% for cars and up to 17% for trucks. Acceleration of vehicle during the operation of the internal combustion engine at a constant speed is due to the acceleration of electric motors. If you install the electric motor parallel to the gearbox and summarize the movements at its output, then in the formed two in-line gearbox during acceleration of vehicle, the reduction of the gear ratio will occur. In the article, the law of changing the specified gear ratio during acceleration is determined and the restrictions on the condition for preventing slipping of driving wheels are determined. The torque of the internal combustion engine oscillates in one operation cycle. This entails a fluctuation in the angular velocity of the crankshaft. Therefore, for ICE, the concept of “constant angular velocity” is conditional. In fact, depending on the number of cylinders and the average value of the specified angular velocity of the crankshaft, the instantaneous value of the angular velocity varies within certain limits. Evaluation of the limits of fluctuation of the angular velocity of the crankshaft with a constant average value allows it to ensure the stability of the internal combustion engine. The article provides an assessment of the stability of the internal combustion engine at steady and unsteady (with increasing fuel supply) operating modes.
- Mikhail Podrigalo - Kharkov National Automobile and Highway University
- Viktor Bogomolov - Kharkov National Automobile and Highway University
- Mykhailo Kholodov - Kharkov National Automobile and Highway University
- Alexander Koryak - Kharkiv National Automobile and Highway University
- Anatoliy Turenko - Kharkov National Automobile and Highway University
- Ruslan Kaidalov - National Academy of National Guard of Ukraine
- Victor Verbitskiy - VN Karazin Kharkiv National University
- Andrey Nikorchuk - National Academy of National Guard of Ukraine
- Mykyta Volodarets - Pryazovskyi State Technical University
- Serhii Kudimov - Kharkiv National Automobile and Highway University
- Serhii Khodyriev - National Academy of National Guard of Ukraine