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In response to typical issues concerning lithium-ion battery systems for HEVs, a cell-control specialized IC and a scheme for the entire circuit mounting the IC (namely, no isolation and a ldquodaisy-chainrdquo communication architecture) were devised. The circuit was configured with the cell-control specialized ICs with 350 nm, BiDMOS, 50 V/3.3 V analog-digital mixed process. But the circuit can...
Resolver is widely used in electric drive system especially for hybrid electric vehicles (HEV). A resolver system includes not only a variable-reluctance resolver but also an excitation circuit, shielding cables and a resolver-to-digital (R/D) IC as a multi-physics system with electrical, magnetic, mechanical and control characteristics. This paper studies a resolver for HEV electric motor, and proposes...
To comprehensively deal with tracking capability and fuel economy issue of ACC-activated vehicle, this paper presents a MPC based vehicular following control algorithm. After compensating the nonlinearity of vehicle longitudinal dynamics by inverse model, the car-following system is built as 3-state space linear model. On its basis, a standard MPC optimization cost is constructed mainly considering...
An experimental research platform based on dynamic testbed is developed and applied for fuel cell hybrid powertrain test and integration. Driver brake model is added to dynamic testbed to simulate brake process of electric vehicle. Test methods of sub systems and whole hybrid powertrain are investigated. Characteristic curve of sub parts and energy flow chart of hybrid powertrain are acquired through...
We proposed a fully-software distributed failure diagnosis system for vehicles based on the TH-OSEK real-time embedded OS platform we previously developed. The diagnosis system puts all the ECUs into a virtual logical ring and uses the MR(Maintain Ring) algorithm and OL(Off Line) algorithm to detect a faulted ECU and isolate it without destroying the structure of the logical ring. When a faulted ECU...
A new type insulation resistance on-line monitor has been designed for hybrid electric vehicle (HEV). It is mainly composed of a proportional circuit and data sampling, processing module. The device detects insulation resistance by sampling DC bus voltage and voltage between positive line and chassis. The voltages sample is controlled by electronically controlled unit (ECU). These voltages are isolated...
This paper investigates the use of a support vector machine (SVM) to predict the state of charge (SOC) of a large-scale Ni-MH battery pack in hybrid electric vehicles (HEV). Estimate the state of charge (SOC) is very essential for HEVspsila energy monitoring and management systems. The nonlinear SOC dynamics is represented by a nonlinear autoregressive moving average with exogenous variables (NARMAX)...
It is proposed that a kind of new electric machine with double rotor applied to hybrid electric vehicle system in this paper. It consists of a cup-type rotor, a permanent magnetic rotor and a stator. The mathematical model equations of the double-rotor motor based on the structure of this motor are deduced, and verified by the numerical simulation as well. Then two kinds of working states of this...
Most of the leading companies of automobile and semiconductor today are collaborating to develop the FlexRay communication protocol for the future automotive applications. It is fundamental to evaluate the response time of the communication in order to optimize the communication system designed with the FlexRay protocol. This paper presents mathematical models for the response time of static segment...
A multi-body virtual prototype of heavy truck is presented in ADMAS/CAR software. Two kinds of adjustable damper control system are established within MATLAB/Simulik virtual environment, including semiactive dasiaon-offpsila control and semi-active magneto-rheological (MR) control based on revised Bingham model. In addition, co-simulation to the whole truck system is finished through building interface...
This paper presents an active hybrid battery/ultra-capacitor based vehicular power system. The stand alone battery system may not be sufficient to satisfy peak demand periods during transients in HEVs. An ultra-capacitor bank can supply or recapture a large burst of power since it can be used with high C-rates. Active battery/ultra-capacitor hybrid model provides a better solution in terms of efficient...
Induction machines (IM) are widely employed as actuators in electromechanical driven system, and IMpsilas control problems, the demands of which are to realize energy saving and speed regulation, have become more significant than before. Efficiency and power factor are two crucial indices in energy saving control issues, and to realize economical running with remarkable efficiency and high power factor,...
In this paper, a research about air-drive AMT (automatic mechanical transmission) fault diagnostic system is made. The redundancy analysis method and action analysis method are used to detect the failures in the AMT system and a fault diagnostic system of air-drive AMT in heavy commercial vehicle is developed by model based design which is very adapt to the development of automotive control system...
Combining high energy density batteries and high power density ultracapacitors in fuel cell hybrid electric vehicles (FCHEV) results in a high efficient, high performance, low size, and light system. Often the batteries are rated with respect to their energy requirement in order to reduce their volume and mass. This does not prevent deep discharges of the batteries, which is critical to their lifetime...
A two-dimensional time-stepping finite element analysis of a single-sided linear induction motor (LIM) used in transportation systems is presented in this paper. The analysis model taking into account the transverse edge effect and primary moving is proposed. The thrust and normal force are calculated at different speeds using Maxwellpsilas stress tensor. The simulation results are found to be a good...
Based on the geometry parameters of forest fire patrol and saving vehicle, the model of whole vehicle is built up. Then combined finite element analysis with multi body dynamic, this paper analyzes the process of loading to the model and acquires the time-displacement curve on various velocities and responding. Though adding spring to simulate real-vehicle moment, and adjusting stiffness to simulate...
Today, electromagnetic compatibility seems to be one of the major constraints of powertrain and especially for clean energy automotive. The major purpose of paper is to get the veracity and repeatability of the testing results, and then to study the theory of RFI/EMI to resolve the interference resource and cut the interfering path. This paper will carry on the theory analysis and design analysis...
The economical and regulatory pressures place on the automotive industry to develop vehicles with increased fuel efficiency will continue to grow over the coming decade. Hybrid electric vehicles (HEVs) represent a solution which has received a large degree of interest from government, academia, and automotive manufacturers. This paper studies the potential of using a fuzzy logic controller to optimize...
Recognition of driverpsilas attention plays an important role in driver assistance system, which can recognize the driverpsilas state and prevent the driver from distracting his attention. To some extent, the driverpsilas head pose implies his attentionpsilas orientation. In this paper we describe a vision-based scheme of estimating the driverpsilas head pose, which is based on estimating the relative...
Air-gap magnetic field of electromagnetic continuously variable transmission (EMCVT) is composed by permanent magnet and electromagnetic excitation winding. FEM is adopted to study the three-dimensional airgap magnetic field based on mathematical model. The trust deduced of air-gap magnetic field from FEM is verifield been adjusted by the theoretic prototype. The study shows the magnetic field of...
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