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In this work, we present a bio-inspired fin prototype as a propulsion system for a submarine robot. We explain the rajiform locomotion, which is intended to be imitated with the movements of the fin. It is also explained how the undulations on the fin allow it to have different behaviors, thus generating thrust in different directions, which in turn generates several types of motion for the fin. Our...
Hybrid electric vehicles are one of the most practicable technologies in the automobile industry to conserve resources and to protect the environment. Mode transitions between different modes are critical to improve fuel economy and driving performances. Due to the response delay of the engine and the engagement of the clutch, smooth transitions are sometimes difficult to achieve. Fuzzy sliding mode...
As one of automotive engine's important working states, idle-speed has much relation to the engine's fuel consumption and exhaust-gas pollution level. Effective idle speed control (ISC) can improve fuel economy and reduce exhaust emissions, the principal operation of ISC is to uphold the actual engine speed very close to the set point value when any disturbance is added. Automotive engines are typical...
The research object of this paper is a single-shaft parallel hybrid electric vehicle (PHEV). A noticeable jerk or torque fluctuation in the hybrid powertrain may result in the vibration of the drivetrain and an unpleasant driving sensation during transition from the motor driving mode to the hybrid driving mode. According to the analysis of the vehicle dynamics, the switching process is divided into...
Co-simulation can greatly improve the simulation accuracy by integrating advantages of different software in a unified system. In this paper, co-simulation of energy management strategy for hybrid electric vehicle (HEV) is implemented through the secondary development in AVL InMotion system. Firstly, the models of the virtual driver, 3D road and traffic environment are realized in IPG CarMaker. Secondary,...
This paper intends to lay the groundwork for detection of backlash nonlinearity in a two-mass rotational system representing a vehicle driveline. It involves experiments and practical considerations prior to carrying out a system identification of the plant. Four possible system configurations are elaborated. Parameter estimation is then carried out in Dymola. Practical factors that affect the quality...
This paper proposes a control design for startergenerator system based on permanent-magnet synchronous machine. This proposed control can be used in much higher speed area to comply with the developing trend of starter-generator system. In starting and generation mode, the control architecture implements current loop as inner loop both whereas speed loop and DC-bus voltage loop as outer loop respectively...
This paper deals with description of the use of electrically powered compressor for a turbocharged internal combustion engine. The main purpose for use of electrically powered compressor is an improvement of transient engine behavior and increase of the boost pressure at low engine speeds. The compressor is driven by high speed switched reluctance machine, while in this paper the control scheme is...
Paper presents performance of the 40kVA autonomous, adjustable speed generation system in a short-circuit condition, protected by a B-class tripping switch. Tripping switch is unable to clear the short-circuit event when an inverter current is limited, thus a topology of asynchronous bypass is developed, which delivers additional current directly from permanent magnet generator. Experiments of the...
A method for evaluating driving technique and engine operation, with emissions constraints, on a real driving route, is presented. A single degree of freedom vehicle model with simple resistive forces is driven along the pre-planned route. Instead of the velocity trajectory being determined a priori, the optimisation can choose the optimal speed along the route as well as the engine operating point...
During car services, it is sometimes necessary to measure the effective performance of the engines. After repairs it is very useful to check the change of the performance. In this case you don't have possibility of dismantling. You can measure the vehicle on roll benches. In this case you have so-called wheel performance as result. The new method discussed and described in this article provides a...
In order to comprehensively evaluate the performance of matching between engine and torque converter, a series of matching evaluation indexes were developed according to the ideal matching principle and a standardized treatment for every index was put forward. Considering the different importance of each indexes in different applications, weight of each index was given by using comprehensive method,...
For road transportation, adaptive cruise control (ACC) is a widely used driver assistance technique with partially longitudinal automation. The existing ACC systems usually ignore the road elevation information, which often ends up with large tracking error and poor fuel economy on the roads with up and down slopes. This paper presents a model-based predictive controller (MPC) for fuel-saving ACC...
Electronic Control Unit is an electronic system which controls different engine parameters for optimized performance. In SI engine, ECU controls the Injector opening timing and spark timing at different engine speed and load. Many ECU functionalities like Idle control, Cold start control, AFR control, Altitude correction etc. are explained in this paper which are helpful/main control strategies while...
This paper is concerned with the increase of the damping behavior of an engine test bed by suitable extending the control strategy of a standard engine test bed with respect to the test of high charged, small displacement combustion engines used in modern hybrid powertrain concepts. Especially in high performance engines (e.g. such as for race cars) the outbid boosting with electrical driven turbo...
The paper investigates on energy management strategies during conversion of the conventional vehicle into the plug-in hybrid electric vehicle (PHEV). The Tata Indica converted PHEV is considered with designed specification of the electric drivetrain. The energy management system decides the preferred operating points for the different powertrain subsystems (i.e. set points for the engine and motor...
The paper presents a performance analysis for Tata Indica diesel vehicle converted to the parallel plug-in hybrid electric vehicle. The performance of fuel consumption and all emissions is analyzed by considering sample urban and highway Indian driving cycle. The complete vehicle is simulated using an ADvanced VehIcle SimulatOR (ADVISOR) simulation software with MATLAB Simulink for simulation of a...
This paper deals with the problem of identifying the mathematical model of a dry-clutch transmission system, from input-output data experimentally collected on a real vehicle. The proposed identification procedure is based on a set-membership identification approach, where a-priori information on the structure of the physical model are taken into account in the selection of the model class. Parameter...
A mild hybrid electric-diesel powertrain for personal vehicles is modeled with respect to longitudinal vehicle dynamics in real-world recorded drive cycles. The potential in terms of fuel consumption reduction in an ideal P0 and P2 mild hybrid electric system is evaluated in order to define the outer boundaries of how much the hybrid topologies can offer. The results are compared with logged data...
One of the most critical situations in the operation of medium and low speed synchronous generators appears when they are subjected to torque imbalances. This could be the case of internal combustion engines driven generators. In these engines, torque has a periodic oscillation due to variations in the combustion process and pressure development between cylinders. Consequently, a fuel excess or a...
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