Multi-objective optimal powertrain design of parallel hybrid vehicles with respect to fuel consumption and driving performance

2014 ◽  
Author(s):  
Thomas J. Boehme ◽  
Benjamin Frank ◽  
Markus Schori ◽  
Torsten Jeinsch
Keyword(s):  
Fuel Consumption ◽  
Driving Performance ◽  
Hybrid Vehicles ◽  
Multi Objective ◽  
Parallel Hybrid ◽  
Powertrain Design

Multi-Objective Optimal Design of Parallel Plug-In Hybrid Powertrain Configurations with Respect to Fuel Consumption and Driving Performance

2014 ◽  
Vol 3 (2) ◽  
pp. 176-192 ◽  
Author(s):  
Thomas Juergen Boehme ◽  
Matthias Rothschuh ◽  
Benjamin Frank ◽  
Matthias Schultalbers ◽  
Markus Schori ◽  
...  
Keyword(s):  
Optimal Design ◽  
Fuel Consumption ◽  
Driving Performance ◽  
Hybrid Powertrain ◽  
Multi Objective

Impact of Motor Size & Efficiency on Acceleration, Fuel Consumption & Emissions of Split-Axle Through-the-Road Parallel Hybrid Electric Vehicle

2014 ◽  
Vol 663 ◽  
pp. 498-503 ◽  
Author(s):  
Saiful A. Zulkifli ◽  
Syaifuddin Mohd ◽  
Nordin B. Saad ◽  
A. Rashid A. Aziz
Keyword(s):  
Fuel Consumption ◽  
Electric Vehicle ◽  
Hybrid Electric Vehicle ◽  
Combustion Engine ◽  
Hybrid Vehicles ◽  
The Road ◽  
Parallel Hybrid Electric Vehicle ◽  
Parallel Hybrid ◽  
Hybrid Electric ◽  
Improved Performance

A split-axle parallel hybrid drive-train with in-wheel motors allows for existing combustion-engine-driven vehicles to be converted into a hybrid vehicle with minor mechanical modification, resulting in a retrofit-conversion hybrid electric vehicle (HEV). This is achieved by placing electric motors in the hub of the otherwise non-driven wheels. Due to the wheel hub’s size constraint, the allowable size and power of the electric in-wheel motor that can be installed is severely restricted to less than 10 kW per wheel, which raises the concern of lack of improved performance compared to the original vehicle. This work analyzes the influence of motor sizing and efficiency on acceleration performance, fuel consumption and emission levels of three different converted hybrid vehicles, through simulation. Results provide insight into sensitivity of different-sized vehicles with varying-size engines, to the size and efficiency of the retrofitted electric motor.

Analytical Calibration of Map-Based Energy Managements of Parallel Hybrid Vehicles

2014 ◽  
Author(s):  
Thomas Juergen Boehme ◽  
Markus Schori ◽  
Heiko Rabba ◽  
Matthias Schultalbers
Keyword(s):  
Hybrid Vehicles ◽  
Parallel Hybrid ◽  
Analytical Calibration

An Energy Efficient Power-Split Hybrid Transmission System to Drive Hydraulic Implements in Construction Machines

2021 ◽  
Author(s):  
Mateus Bertolin ◽  
Andrea Vacca
Keyword(s):  
Fuel Consumption ◽  
Pollutant Emissions ◽  
Engine Operation ◽  
Construction Machinery ◽  
Load Sensing ◽  
Parallel Hybrid ◽  
Power Split ◽  
Truck Loading ◽  
Hybrid Transmission ◽  
Efficient Power

Abstract This paper proposes a novel hybrid power-split transmission to drive hydraulic implements in construction machinery. The highly efficient power-split hybrid transmission is combined with displacement controlled (DC) actuators to eliminate throttling losses within the hydraulic system and achieve higher fuel savings. The architecture design, sizing and power management are addressed. Simulation results considering a realistic truck-loading cycle on a mini excavator demonstrate the feasibility of the idea. A systematic comparison between the proposed system and the previously developed series-parallel hybrid is also carried out. The paper compares engine operation and fuel consumption of the previously mentioned hybrid system with the original non-hybrid load-sensing machine. It is shown that by implementing an efficient engine operation control, the proposed system can achieve up to 60.2% improvement in fuel consumption when compared to the original machine and consume 11.8% less than the previously developed series-parallel hybrid with DC actuation. Other advantages of the proposed solution include a much steadier engine operation, which opens to the possibility of designing an engine for optimal consumption and emissions at a single operating point as well as greatly reduce pollutant emissions. A steadier prime mover operation should also benefit fully electric machines, as the battery would not be stressed with heavy transients.

Optimal integrated energy management and shift control in parallel hybrid electric vehicles with dual-clutch transmission

2019 ◽  
Vol 234 (2-3) ◽  
pp. 599-609
Author(s):  
Guoqiang Li ◽  
Daniel Görges
Keyword(s):  
Fuel Consumption ◽  
Energy Management ◽  
Electric Vehicles ◽  
Hybrid Electric Vehicles ◽  
Weighting Factor ◽  
Engine Torque ◽  
Shift Control ◽  
Parallel Hybrid ◽  
Power Split ◽  
Hc Emissions

This paper addresses the integration of the energy management and the shift control in parallel hybrid electric vehicles with dual-clutch transmission to reduce the fuel consumption, decrease the pollutant emissions, and improve the driving comfort simultaneously. Dynamic programming with a varying weighting factor in the cost function is proposed to balance the shift frequency and the fuel consumption for the power-split control and gear schedule design. Simulation results present that the drivability can be improved with a varying weighting factor due to fewer shift events while the fuel consumption is only slightly increased compared to dynamic programming with a constant weighting factor. A shift-energy-management strategy integrating the upshift and power-split control based on a multi-objective optimization is presented where model predictive control is employed to ensure engine load rate constraints. The strategy can smoothen the engine torque through torque compensation from the electric motor to prevent engine transient emissions resulting from a sudden load change. In a simulation study, the NOx and HC emissions could be reduced by 1.4% and 2.6% with 2% increase of the overall fuel consumption for the Federal Test Procedure 75 by smoothening the engine torque. For the New European Driving Cycle, 0.9% and 1.1% reduction of NOx and HC emissions could be achieved with only 0.3% more fuel consumption.

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