scholarly journals Feasibility of a Clutchless Dual-Shaft Hybrid Transmission System for Performance Applications

2016 ◽  
Author(s):  
Sahil Shah ◽  
Victor Prost ◽  
Zachary Eubanks ◽  
Paige Reiter ◽  
Daria Bondarchuk ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Electric Motor ◽  
Combustion Engine ◽  
Regenerative Braking ◽  
Electric Transmission ◽  
High Acceleration ◽  
Viscous Losses ◽  
Hybrid Transmission ◽  
Reverse Gear ◽  
Viable Method

A novel hybrid-electric transmission concept was sought that yields higher acceleration and smoother gear-shifts compared to existing dual-clutch systems while improving the energy efficiency of the vehicle. After evaluating a range of strategies, the elimination of the clutch was identified as a viable method for reducing the vehicle’s effective inertia and viscous losses. The proposed architecture implements a single electric motor, and two separate shafts for odd and even gears, to replace the functions of a clutch. High acceleration rates can be achieved using the electric motor when launching the vehicle. Furthermore, the torque from the electric motor (EM) and internal combustion engine (ICE) can be simultaneously delivered through the two shafts to sustain this high acceleration. A 0 to 100 km/hr time of 3.18 s was simulated for a 1600 kg vehicle using a 180 kW EM and 425 kW ICE. In addition, the EM can be used to match the speeds of consecutive gears on the two shafts to reduce jerk while shifting. Shift durations were found to vary between 0.2 and 0.9 s using this strategy. Other benefits include regenerative braking and the removal of the reverse gear since the EM can rotate in either direction. It was also found that the vehicle can be operated on only electric power in urban settings — represented by the NEDC driving cycle — if the battery is recharged through regenerative braking, and by the ICE the vehicle is stopped.

scholarly journals Research of a Hybrid Diesel Locomotive Power Plant Based on a Free-Piston Engine

2020 ◽  
Vol 22 (3) ◽  
pp. 103-109
Author(s):  
Serhiy Buriakovskyi ◽  
Borys Liubarskyi ◽  
Artem Maslii ◽  
Danylo Pomazan ◽  
Tatyana Tavrina
Keyword(s):  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Diesel Generator ◽  
Piston Engine ◽  
Diesel Locomotive ◽  
Free Piston ◽  
Electric Transmission ◽  
Free Piston Engine ◽  
Hybrid Transmission

This article describes one of the possible ways for improving the energy efficiency of shunting diesel locomotives. It means a replacing a traditional traction electric transmission with a diesel generator set with a hybrid transmission with a free-piston internal combustion engine and a linear generator. The absence of a crankshaft in an internal combustion engine makes it possible to reduce thermal and mechanical losses, which, in turn, leads to an increase in the efficiency of traction electric transmission of the diesel locomotive.

Topological Design of Parallel Hybrid Transmission With Electric Torque Support

2015 ◽  
Author(s):  
Zengxiong Peng ◽  
Shihua Yuan ◽  
Jibin Hu ◽  
Mingfei Gao
Keyword(s):  
Nonlinear Equations ◽  
Electric Motor ◽  
Degrees Of Freedom ◽  
Combustion Engine ◽  
Transmission Efficiency ◽  
Gear Ratio ◽  
Manufacturing Cost ◽  
Power Performance ◽  
Parallel Hybrid ◽  
Hybrid Transmission

In the last years hybrid Transmissions have spread worldwide in the automotive industry due to their excellent power performance and good fuel economy. The design of parallel hybrid automatic manual transmission (AMT) with electric torque support using one electric motor is a good solution of obtaining high transmission efficiency and low manufacturing cost. The gear pairs between the combustion engine (CE) shaft and electric motor (EM) shaft are assigned to form the new architecture of three degrees of freedom (DOFs) AMT with electric torque support, which provides several CE gears ratios and several EM gears ratios. All theoretical layouts of parallel hybrid AMT with three shafts are presented and classified into four types. And the synthesis of the gear ratios sequence is developed to satisfy power shifting. The gear ratios can be divided into direct gear ratio and generated gear ratio. The ratio design of generated gear is dependent on the ratio of the direct gears, so the design of gear ratio can be transformed into the solution of over-determined nonlinear equations. An algorithm of minimax solution for over-determined nonlinear equations is presented to design and evaluate gear ratios. The three-DOF three-shaft AMT with electric torque support are designed to obtain seven CE gear ratios. This paper helps to further the understanding of the systematic design of parallel hybrid AMT with electric torque support.

A Novel Parallel Hybrid Motorcycle Transmission

2006 ◽  
Vol 505-507 ◽  
pp. 1021-1026
Author(s):  
Kuen Bao Sheu ◽  
Tsung Hua Hsu ◽  
Yuan Yong Hsu
Keyword(s):  
Electric Motor ◽  
Combustion Engine ◽  
Power Sources ◽  
Parallel Hybrid ◽  
Motor Mode ◽  
Variable Transmission ◽  
Hybrid Transmission ◽  
Charging Mode ◽  
Power Mode ◽  
Chain Drives

This paper presents a novel parallel hybrid transmission for motorcycles. This transmission incorporates a mechanical type rubber V-belt continuously variable transmission and chain drives to combine the power of the two power sources, an internal combustion engine and an electric motor. By using the mechanical type clutches used in the proposed transmission, it can provide a parallel hybrid that can be grouped into four modes of operation: electric motor mode, engine mode, engine/charging mode, and power mode. A design example is built and tested.

Whither electric cars?

1997 ◽  
Vol 24 (1) ◽  
pp. 2-2
Author(s):  
GIACOMO de SABATA
Keyword(s):  
Air Pollution ◽  
Energy Efficiency ◽  
Electric Motor ◽  
Power Plants ◽  
Fossil Fuel ◽  
Combustion Engine ◽  
Electric Cars ◽  
Fossil Fuel Burning ◽  
Fuel Burning ◽  
Lower Total Energy

In a previous report I tried to show that the widespread use of electric cars, both battery-powered and so-called ‘hybrid’ types (i.e. vehicles utilizing an electric motor powered by a battery in town, and a combustion engine on open highways), would not reduce, but rather increase, air pollution, because the electricity required to run them would have to be generated by a large number of additional fossil-fuel burning power plants, with a lower total energy efficiency (de Sabata 1995).

CONVERTING THE VEHICLE BY REPLACING THE INTERNAL COMBUSTION ENGINE

2019 ◽  
pp. 29-35
Author(s):  
Oleksandr Gryshchuk ◽  
Volodymyr Hladchenko ◽  
Uriy Overchenko
Keyword(s):  
Internal Combustion Engine ◽  
Electric Vehicle ◽  
Electric Motor ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Environmental Safety ◽  
Environmental Conservation ◽  
Sales Forecasts ◽  
Financial Investments ◽  
Near Future

This article looks at some comparative statistics on the development and use of electric vehicles (hereinafter referred to as EM) as an example of sales and future sales forecasts for EM in countries that focus on environmental conservation. Examples of financial investments already underway and to be made in the near future by the largest automakers in the development and distribution of EM in the world are given. Steps are taken to improve the environmental situation in countries (for example, the prohibition of entry into the city center), the scientific and applied problem of improving the energy efficiency and environmental safety of the operation of wheeled vehicles (hereinafter referred to as the CTE). The basic and more widespread schemes of conversion of the internal combustion engine car (hereinafter -ICE) to the electric motor car (by replacing the gasoline or diesel electric motor), as well as the main requirements that must be observed for the safe use and operation of the electric vehicle. The problem is solved by justifying the feasibility of re-equipment of the KTZ by replacing the internal combustion engine with an electric motor. On the basis of the statistics collected by the State Automobile Transit Research Institute on the number of issued conclusions of scientific and technical expertise regarding the approval of the possibility of conversion of a car with an internal combustion engine (gasoline or diesel) to a car with an electric motor (electric vehicle), the conclusions on the feasibility of such conclusion were made. Keywords: electricvehicles, ecological safety, electricmotor, statistics provided, car, vehicle by replacing.

scholarly journals Batteries in a vehicle – conditions, capabilities and limitations

2018 ◽  
Vol 180 ◽  
pp. 03001
Author(s):  
Piotr Julian Biczel ◽  
Maciej Kwiatkowski
Keyword(s):  
Specific Energy ◽  
Electric Motor ◽  
Combustion Engine ◽  
Mass Range ◽  
Electrochemical Cells ◽  
Charging Time ◽  
Vehicle Mass ◽  
Primary Means ◽  
The Difference ◽  
Basic Features

Electric buses are now seen as the primary means of public transport in cities. However, their exploitation is associated with a number of limitations. The article presents the problem of battery use in buses. The design differences between the vehicle with the internal combustion engine and the electric motor are discussed. In particular, authors compared the number of passengers that both types of buses can take, as well as the difference in vehicle mass and range, and the reasons for these differences. The types of electrochemical cells that can be used to power vehicles and their basic features are presented. The article focuses on the NMC, LFP, LTO and LIC type cells. Next, the battery pack structure and its components were described. The specific energies of cells and batteries constructed from these cells were compared. Next, the most important features of the vehicle equipped with batteries with various types of cells are discussed. The mass, range, charging time and cycle lifetime of the batteries were compared. The basic dependence was noted: the greater the specific energy, the smaller the number of battery cycles. So if the bus has to take more passengers, it must have light batteries, which should be frequently charged, which requires high cyclic lifetimes.

scholarly journals Dynamic Simulation and Control of a New Parallel Hybrid Power System

2020 ◽  
Vol 10 (16) ◽  
pp. 5467
Author(s):  
Po-Tuan Chen ◽  
Cheng-Jung Yang ◽  
Kuohsiu David Huang
Keyword(s):  
Fuzzy Logic ◽  
Power System ◽  
Internal Combustion Engine ◽  
Dynamic Simulation ◽  
Electric Motor ◽  
Fuzzy Logic Controller ◽  
Simulation Analysis ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Power Sources

To avoid unnecessary power loss during switching between the various power sources of a composite electric vehicle while achieving smooth operation, this study focuses on the development and dynamic simulation analysis of a control system for the power of a parallel composite vehicle. This system includes a power integration and distribution mechanism, which enables the two power sources of the internal combustion engine and electric motor to operate independently or in coordination to meet the different power-output requirements. The integration of the electric motor and battery-charging engine reduces the system complexity. To verify the working efficiency of the energy control strategy for the power system, the NEDC2000 cycle is used for the vehicle driving test, a fuzzy logic controller is established using Matlab/Simulink, and the speed and torque analysis of the components related to power system performance are conducted. Through a dynamic simulation, it is revealed that this fuzzy logic controller can adjust the two power sources (the motor and internal combustion engine) appropriately. The internal combustion engine can be maintained in the optimal operating region with low, medium, and high driving speeds.

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