<rss version="2.0" xmlns:atom="https://www.w3.org/2005/Atom">
  <channel>
    <title>Transport Research International Documentation (TRID)</title>
    <link>https://trid.trb.org/</link>
    <atom:link href="https://trid.trb.org/Record/RSS?s=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" rel="self" type="application/rss+xml" />
    <description></description>
    <language>en-us</language>
    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
    <docs>http://blogs.law.harvard.edu/tech/rss</docs>
    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
    <image>
      <title>Transport Research International Documentation (TRID)</title>
      <url>https://trid.trb.org/Images/PageHeader-wTitle.jpg</url>
      <link>https://trid.trb.org/</link>
    </image>
    <item>
      <title>Research on flexible and controllable starting strategy for commercial vehicle diesel range extender</title>
      <link>https://trid.trb.org/View/2511221</link>
      <description><![CDATA[For range extender, engine starting conditions and boosting methods lead to varying oil film formation and pressure establishment durations, resulting in differences in optimal starting durations. This paper primarily addresses the control issue of range extender starting duration. Initially, it establishes and validates the dynamic model of the target range extender system, consisting of a four-cylinder diesel engine and a flywheel integrated starter generator (FISG). Subsequently, designing an adjustable and controllable target speed curve by polynomial splicing, and calibrates curve parameters by optimising vibration performance indicators. Based on the target speed curve, the motor torque is designed, with the torque corresponding to the speed primarily constructing the feedforward torque, supplemented by the feedback torque. Finally, the proposed starting control strategy is validated on the test bench, compared with the original strategy, and the impact of different control parameters on the starting control effect is analysed, confirming the effectiveness of the proposed strategy in achieving flexible and controllable starting times.]]></description>
      <pubDate>Tue, 25 Nov 2025 08:55:10 GMT</pubDate>
      <guid>https://trid.trb.org/View/2511221</guid>
    </item>
    <item>
      <title>Methodology of Minimum Energy Starting for SI Engine</title>
      <link>https://trid.trb.org/View/2623957</link>
      <description><![CDATA[In general-purpose small SI engines, it is necessary to reduce fuel consumption under operating conditions involving repeated starts and stops. In other words, the energy distribution during the transition from 0 rpm to idling speed is a crucial factor. At startup, the SI engine must be driven by a motor, and the electrical energy required should be minimized. However, the engine must accelerate during this process, and the required electrical energy is influenced by factors such as compression, friction, and moments of inertia. The purpose of this research is to experimentally clarify the conditions for minimum energy starting in SI engines. Specifically, the effect of the moment of inertia was eliminated by using a motor to maintain a constant engine speed, thereby enabling the isolation and measurement of electrical energy consumed by friction. The electrical energy required to overcome the moment of inertia can be determined by comparing it with the energy consumed when accelerating the engine from 0 rpm. Furthermore, the effect of compression can be evaluated by considering the moment of inertia and friction of individual engine components. This study proposes a method for achieving minimum-energy starting in small engines. Two key conditions for minimizing energy use during startup are the acceleration time to reach idling speed and the crank position at the moment of engine ignition.]]></description>
      <pubDate>Thu, 13 Nov 2025 16:12:51 GMT</pubDate>
      <guid>https://trid.trb.org/View/2623957</guid>
    </item>
    <item>
      <title> Methanol Cold Start Procedure for a Serial Hybrid Powertrain</title>
      <link>https://trid.trb.org/View/2614414</link>
      <description><![CDATA[Methanol obtained from regenerative sources is a renewable fuel with many advantages when used in a spark ignition combustion process. Methanol has a comparatively high enthalpy of vaporization, leading to lower combustion temperatures (compared to gasoline combustion) and, hence, lower wall heat losses as well as a reduced tendency to autoignition. Several cold start methods were examined for this paper. In a serial hybrid powertrain with one internal combustion engine, ICE, and one electric machine, the load demand of the ICE can be controlled for best efficiency. The ICE is operated on liquid renewable fuel, which provides a high volumetric and gravimetric power density, easy energy storage, delivered from a very cost effective already existing infrastructure of fuel distribution. The electric machine provides comfortable electric driving, high efficiency, locally and temporary zero emissions. The eFuel should be produced from a closed carbon cycle.Methanol is a challenging fuel, since it has a high flash point at 11 °C indicating a challenging cold start. Feasible solutions are fuel or intake air heating or blending with lightly boiling components. All of these incur expenses for additional component and processes. One of the cold start procedures presented in this paper enables the cold start of pure methanol down to –20 °C, without the necessity for additional engine components. For this the serial hybrid propulsion system is used. The electric machine was used to motor the ICE at high engine speeds and strongly throttled with minimal fuel mass, to allow for fuel evaporation in the intake and heating during the compression stroke. A 3D-CFD simulation was setup the explore the procedure. The new procedure is compared to a conventional process with air and fuel heating.]]></description>
      <pubDate>Mon, 27 Oct 2025 17:12:42 GMT</pubDate>
      <guid>https://trid.trb.org/View/2614414</guid>
    </item>
    <item>
      <title>Active–Passive Torsional Vibration Suppression Method for
                    Electromechanical Coupling System of Parallel Hybrid Electric
                    Vehicles</title>
      <link>https://trid.trb.org/View/2595161</link>
      <description><![CDATA[
                
                The diversity of excitation sources and operating modes in hybrid electric
                    vehicles (HEVs) exacerbates the torsional vibration issues, presenting
                    significant challenges to the vehicle’s overall noise, vibration, and harshness
                    performance. To address the complex torsional vibration challenges of the HEVs,
                    this study proposed an active–passive collaborative vibration suppression
                    approach. In terms of passive suppression, a multi-condition parameter
                    optimization scheme for the torsional vibration dampers is designed. In terms of
                    active suppression, a fuzzy control–based electronically controlled damper is
                    proposed, and a hybrid feedforward–feedback motor torque compensation strategy
                    is developed. Simulation results demonstrated that the proposed method reduces
                    the root mean square value of the angular acceleration by over 65% under
                    acceleration and idle conditions and the maximum transient vibration value by
                    55% during the engine starting condition.
            ]]></description>
      <pubDate>Mon, 08 Sep 2025 12:23:53 GMT</pubDate>
      <guid>https://trid.trb.org/View/2595161</guid>
    </item>
    <item>
      <title>Prediction of Hazardous Gaseous Emissions from a Gasoline Engine during Cold Starts Using Machine Learning Methods</title>
      <link>https://trid.trb.org/View/2571703</link>
      <description><![CDATA[Internal combustion engines generate higher exhaust emissions of hazardous gases during the initial minutes after engine start. Experimental data from a state-of-the-art turbo-charged 3-cylinder, 999 cc gasoline engine are used to predict cold start emissions using two Machine Learning (ML) models: a Multilayer Perceptron (MLP) which is a fully connected neural network and an Encoder-Decoder Recurrent Neural Network (ED-RNN). Engine parameters and various temperatures are used as input for the models and NOx (Nitrogen Oxides), CO (Carbon monoxide) and unburned hydrocarbon (UHC) emissions are predicted. The dataset includes time series recordings from the Worldwide harmonized Light-duty vehicles Test Cycle (WLTC) and four Real Diving Emissions (RDE) cycles at ambient and initial engine temperatures ranging from -20 °C to +23 °C. In total, 21 cases are considered, consisting of eight different ambient temperatures and five distinct driving cycles. Each case consists of a sequence of 2500 samples taken at 5 Hz. The training process utilized seven input variables and three output variables (emissions). Two validation scenarios were defined. The first scenario assessed the ability of the models to predict emissions at ambient temperatures not included in the training process. The second, more challenging scenario, tested the ability of the models to predict emissions for unseen driving cycles, but at temperature levels that were included in the training process. Both models predicted the validation cases with reasonable accuracy in the first scenario. However, in the second scenario, the MLP model failed to predict the data accurately, while the ED-RNN model delivered significantly better results, thus demonstrating greater robustness. The low inference CPU-time (Central Processing Unit) of the ED-RNN model makes it suitable for real-time prediction and emission control.]]></description>
      <pubDate>Tue, 08 Jul 2025 10:41:05 GMT</pubDate>
      <guid>https://trid.trb.org/View/2571703</guid>
    </item>
    <item>
      <title>An Approximate Three-Phase AC Excitation Method With Parallel Capacitors for Aircraft Wound Rotor Synchronous Starter/Generator</title>
      <link>https://trid.trb.org/View/2553524</link>
      <description><![CDATA[In order to solve the excitation problem of wound rotor synchronous starter/generator (WRSSG) in the starting mode, an approximate three-phase ac excitation method with parallel capacitors is proposed. In this method, the main exciter (ME) is equipped with three-phase field winding and two parallel capacitors. The proposed method can realize the approximate effect of the three-phase ac excitation, only needing a single-phase ac excitation power source with constant voltage and constant frequency. Compared with the existing excitation methods, the proposed method has relatively high excitation efficiency and power factor. The variation range of ME output current during the starting process is narrowed by selecting appropriate parallel capacitor parameters so that there is no need for the control of the excitation power source. In this article, the 12-kVA WRSSG is taken as the research object, and the principle and characteristics of the proposed method are analyzed by theoretical method and finite element (FE) field-circuit coupling simulation. The multiobjective optimization method based on the Kriging approximation model combined with an evolutionary algorithm (EA) is utilized to determine parallel capacitor parameters. A 12-kVA WRSSG prototype is manufactured and tested. The simulation and experimental results verify the feasibility and advantages of the proposed method.]]></description>
      <pubDate>Wed, 25 Jun 2025 09:25:28 GMT</pubDate>
      <guid>https://trid.trb.org/View/2553524</guid>
    </item>
    <item>
      <title>Dynamic Tailgate Water Management Simulation Using Smoothed Particle Hydrodynamics</title>
      <link>https://trid.trb.org/View/2539561</link>
      <description><![CDATA[Opening a tailgate can cause rain that has settled on its surfaces to run off onto the customer or into the rear loadspace, causing annoyance. Relatively small adjustments to tailgate seals and encapsulation can effectively mitigate these effects. However, these failure modes tend to be discovered relatively late in the design process as they, to date, need a representative physical system to test – including ensuring that any materials used on the surface flow paths elicit the same liquid flow behaviours (i.e. contact angles and velocity) as would be seen on the production vehicle surfaces. In this work we describe the development and validation of an early-stage simulation approach using a Smoothed Particle Hydrodynamics code (PreonLab). This includes its calibration against fundamental experiments to provide models for the flow of water over automotive surfaces and their subsequent application to a tailgate system simulation which includes fully detailed surrounding vehicle geometry. This approach simulates the accumulation of rain on the rear surfaces of a stationary vehicle over the course of 60 s, which is followed by a drainage period of 20 s (rain source off). Once the starting conditions have been set, the simulation captures the dynamics of the tailgate opening and subsequent surface water run-off. This enables the mechanisms of run-off into the rear loadspace to be explored. Further, we also show the effect of a small modification to the tailgate encapsulation, demonstrating, by reference to physical test, that this simulation method can accurately replicate both the failure mode and its mitigation.]]></description>
      <pubDate>Tue, 15 Apr 2025 13:56:51 GMT</pubDate>
      <guid>https://trid.trb.org/View/2539561</guid>
    </item>
    <item>
      <title>Disturbance Estimation Approach for minimizing Control Windup in Target Engine Speed Profile on Electrified Powertrains with a Low Voltage Belt Starter Generator and a Disconnect Clutch</title>
      <link>https://trid.trb.org/View/2539553</link>
      <description><![CDATA[In cost- effective P2 hybrid vehicles with low voltage electric machines connected to the engine, an interesting control problem arises during the transition to a locked driveline state. This occurs when the engine connects to the wheels via a separation clutch. The two primary torque sources, the engine and the clutch, are traditionally imperfect estimators of applied and transferred torques. The Hybrid Supervisor’s feedforward constraints model relies on these imperfect inputs to determine torque and acceleration limits for the engine’s desired acceleration profiles and to specify engine feedforward commands, aiming for synchronization speed. Due to the inaccuracies in the torque estimates of the engine and clutch, the Hybrid Supervisor is susceptible to control windup, increased jerk to the driveline during synchronization, and inaccurate computation of its target acceleration profile, speed, and torque targets for the engine to achieve synchronization speed. This paper presents a disturbance estimation strategy to minimize control windup in the development of the Hybrid Supervisor’s speed trajectory, engine feedforward torque commands, and acceleration commands for transitioning a low voltage P2 Hybrid from EV Mode to Hybrid Mode. Simulation and vehicle results indicating the profiled engine speed remains within +- 5 to 8% of its target with minimal overshoot till we get to synch speed, are provided to demonstrate the strategy’s effectiveness.]]></description>
      <pubDate>Tue, 15 Apr 2025 13:56:51 GMT</pubDate>
      <guid>https://trid.trb.org/View/2539553</guid>
    </item>
    <item>
      <title>Impact of Thermal and Electrical Dissimilarities on Battery Module Aging</title>
      <link>https://trid.trb.org/View/2539205</link>
      <description><![CDATA[Battery cell aging and loss of capacity are some of the many challenges facing the widespread implementation of electrification in mobility. One of the factors contributing to cell aging is the dissimilarities of individual cells connected in a module. This paper reports the results of several aging experiments using a mini-module consisting of seven 5 Ah 21700 lithium-ion battery cells connected in parallel. The aging cycle comprised a constant current-constant voltage charge cycle at a 0.7C C-rate, followed by a 0.2C constant current discharge, spanning the useful voltage range from minimum to maximum according to the cell manufacturer. Charge and discharge events were separated by one-hour rest periods and were repeated for four weeks. Weekly reference performance tests were executed to measure static capacity, pulse power capability and resistance at different states of charge. All diagnostics were normalized with respect to their starting numbers to achieve a percentage change over time. Both electrical and thermal dissimilarities were considered by initial cell selection or adjusting the thermal boundary conditions, respectively. The latter was achieved by contrasting air cooling with direct liquid immersion cooling which prevented temperature spikes and ensured more uniform temperature distribution between the cells. For well-clustered cells, the use of immersion cooling reduced the capacity fade noticeably when compared to air cooling. However, when cells are not well clustered, the impact of electrical dissimilarities overshadowed the thermal benefits. Poor cell clustering resulted in a lower discharge resistance increase which itself reflected as smaller changes of the pulse power fade. The results highlighted the importance of cell selection and clustering during research and when building packs for final application and reinforced the benefits of good thermal management. The work did not fully explore the benefits of immersion cooling due to the moderate C-rates used.]]></description>
      <pubDate>Tue, 15 Apr 2025 13:56:47 GMT</pubDate>
      <guid>https://trid.trb.org/View/2539205</guid>
    </item>
    <item>
      <title>Battery Thermal Management System for PHEV by using Air Conditioning Heater System</title>
      <link>https://trid.trb.org/View/2539195</link>
      <description><![CDATA[Toyota Motor Corporation pursuing an omnidirectional strategy that includes battery electric vehicle (BEV), plug-in hybrid electric vehicle (PHEV), and fuel cell electric vehicle (FCEV) to accelerate electrification. One of the technical challenges with our xEV batteries which feature good degradation resistance and long battery life, is that regenerative braking cannot be fully effective due to the decrease in regenerative power in some situations, such as low battery temperature. For the electrified vehicles with an internal combustion engine such as PHEVs, the solution has been running the engine to increase deceleration through engine braking during coasting. PHEVs are expected to extend their cruising range and enhance EV driving experience as "Practical BEVs". While increasing battery capacity and enhancing convenience, the restrictions on EV driving opportunity due to low battery temperature may negatively affect PHEV’s appealing. As an alternative, introducing a battery heater creates system redundancy, cost, and negative impact on battery pack size. Another alternative solution has been ripple heating of the battery to control battery temperature, but it comes with the concern to deteriorate degradation resistance and shorten battery life. This paper is to present a technology to warm up the battery and increase regeneration by utilizing only the air conditioning heater system as the heat source, to maintain coasting deceleration while minimizing the engine start. In addition, a heater and water valve control system has been developed and will be implemented in the next-generation Toyota PHEV for the thermal management system with optimal cabin heating performance and EV driving range in winter.]]></description>
      <pubDate>Tue, 15 Apr 2025 13:56:47 GMT</pubDate>
      <guid>https://trid.trb.org/View/2539195</guid>
    </item>
    <item>
      <title>Electromagnetic Characteristics Study of Segmental Rotor Dual Mode Reluctance Starter Generator</title>
      <link>https://trid.trb.org/View/2511304</link>
      <description><![CDATA[As a starter, the switched reluctance machine (SRM) features a significant output torque. As a generator, the doubly salient electromagnetic machine (DSEM) has excellent voltage regulation characteristics. To combine the benefits of both types of machines and reduce the length of flux paths, a segmental rotor dual mode reluctance starter generator (SR-DMRSG) for vehicles is proposed in this article. This machine transitions between two operating modes by adjusting the linkage between the armature winding and the variable winding. First, the research object is identified as the SR-DMRSG with a 12/8-pole structure by establishing the corresponding relationship between the number of stator poles and the number of segmented rotors. The magnetic chain, electric potential, and other electromagnetic characteristics of the SR-DMRSG are analyzed by using the finite element method. The study findings demonstrate that the SR-DMRSG displays a 5.46% increase in peak torque when compared with a conventional SRM. Moreover, it operates as a generator which is effortless to regulate. The total harmonic distortion (THD) of the back electromotive force (EMF) of the armature winding decreases by 8.1%. The machine’s feasibility has been verified by simulation and experimental results. It has been confirmed that the SR-DMRSG has high starting torque and effective voltage regulation.]]></description>
      <pubDate>Tue, 25 Mar 2025 16:57:56 GMT</pubDate>
      <guid>https://trid.trb.org/View/2511304</guid>
    </item>
    <item>
      <title>Coordinated Clutch Slip Control for The Engine Start with Power-On
          Downshift in a P2 Hybrid Automatic Transmission</title>
      <link>https://trid.trb.org/View/2505873</link>
      <description><![CDATA[The impact and vibration problem during gear shifting and mode switching of the                     P2 hybrid 8AT system of new energy vehicles seriously affects driving comfort.                     This paper proposed a collaborative clutch slip and friction control strategy                     for a P2 hybrid power system with power downshifting and engine starting to                     reduce transient shock vibration during the power system operation. A dynamic                     model of the P2 hybrid system was established, including a physical model of the                     engine, motor, clutch, 8AT transmission mechanism, and driving resistance. The                     transient dynamic behavior of the P2 hybrid system with power downshifting and                     engine starting was systematically studied. On this basis, with the goal of                     consistent power response and smooth gear shifting, a multi-stage collaborative                     control strategy including the motor, engine, and clutch under the power                     downshifting condition was formulated. Model-in-loop simulation verification was                     carried out based on MATLAB/Simulink platform. The simulation results show that                     compared with traditional methods, the proposed control method can effectively                     improve the power performance and comfort of the P2 hybrid power system.]]></description>
      <pubDate>Thu, 06 Feb 2025 15:48:49 GMT</pubDate>
      <guid>https://trid.trb.org/View/2505873</guid>
    </item>
    <item>
      <title>Impact on FEAD Dynamic Performance of Mild Hybrid Engine with Increase in Engine Torque</title>
      <link>https://trid.trb.org/View/2474992</link>
      <description><![CDATA[Front End Accessory Drive (FEAD) systems are used in automobiles to transfer power from the engine-to-engine accessory components such as the alternator, water pump, etc. using a Belt and Tensioner. The emergence of Mild hybrid technologies has led to the replacement of alternator with Belt-driven Integrated Starter-generator (B-ISG). In conventional configuration of FEAD, the power transfer is in single direction but in mild hybrid engine power transfer is bidirectional: tight and slack side of the Belt changes as per Torque assist or Regeneration mode. The presence of an integrated starter-generator (ISG) in a belt transmission places excessive strain on the FEAD System and necessitates checking the dynamic performance of FEAD System thoroughly.Study of Increase in Engine Torque in existing Vehicle was done to understand its effect on various system. This vehicle is Mild Hybrid and consists of Belt-driven Integrated Starter generator system. Increase in Engine torque lead to increase in rotational fluctuation which directly impacts the FEAD System parameters such Belt slip, Belt Tension, etc. This paper presents the impact of increase in Engine Torque on dynamic performance of FEAD system through System performance test on Vehicle. System Performance test measures various parameters of Vehicle and FEAD System during different test patterns which are worst conditions for FEAD. These different Test patterns were identified based on ISG Modes (Assist, Generation and Regeneration) and various parameters such as Rotational fluctuation, ISG Torque, Battery SOC, etc. System performance Test result shows the Belt slip, Belt Tension and Tensioner behavior during ISG Modes (Assist, Generation & Regeneration). Measurement results were compared and analyzed, and it was judged that current FEAD design of the drive system meets the requirements of Engine with increased torque. Influence of increase in damping of Hydraulic Tensioner on FEAD performance parameter was also demonstrated. Approach followed for design verification in this paper have practical engineering significance for design and development of the FEAD System.]]></description>
      <pubDate>Fri, 13 Dec 2024 11:51:47 GMT</pubDate>
      <guid>https://trid.trb.org/View/2474992</guid>
    </item>
    <item>
      <title>Clutch Torque Optimization for Heavy-Duty Vehicles Starting Based on Intelligent Identification of Driver’s Starting Intention, Vehicle Mass, and Road Grade</title>
      <link>https://trid.trb.org/View/2446821</link>
      <description><![CDATA[
            
            For heavy-duty vehicles equipped with automated mechanical transmission (AMT), the control of automatic clutch torque is crucial during the start-up process. However, the difficulty of controlling clutch torque is exacerbated
                by differences in driver’s starting intentions, changes in vehicle mass, and road gradient. Therefore, this article proposes the clutch starting torque optimization strategy based on intelligent recognition of driver’s starting
                intention, vehicle mass, and road gradient. First, an intelligent recognition strategy is proposed based on the combination of data-driven and onboard transmission control unit (TCU) algorithms, which improves the accuracy of
                recognizing the driver’s intention to start as well as the vehicle mass and road gradient. Based on the vehicle’s historical state data information, the predictive model is trained offline using a long–short-term memory (LSTM) network
                to obtain predicted parameter identification results, which are then used to calibrate the computed values of the onboard TCU algorithm. Second, the clutch torque optimization strategy is designed based on the driver’s starting
                intention, while considering the effects of road gradient and vehicle mass on the clutch starting resistance torque. The weight coefficients of the objective performance function are adjusted according to the driver’s starting
                intention, and the Pontryagin’s minimum principle (PMP) is used to solve the clutch target torque. Finally, offline data training and real-vehicle testing are performed. The results show that the optimization strategy can effectively
                reduce the friction work and the degree of impact during the starting process, minimize the clutch slipping time, and improve the smoothness of vehicle starting and driving comfort.
        ]]></description>
      <pubDate>Mon, 28 Oct 2024 16:36:36 GMT</pubDate>
      <guid>https://trid.trb.org/View/2446821</guid>
    </item>
    <item>
      <title>Dynamic Performance Improvement of Wound Rotor Synchronous Starter/Generator System Based on PWM Rectifier</title>
      <link>https://trid.trb.org/View/2403942</link>
      <description><![CDATA[This article proposes an active field current tracking (AFCT) control strategy for a pulsewidth modulation (PWM) rectifier, which can remarkably enhance the system’s dynamic performance of a wound rotor synchronous starter/generator (WRSSG) system when the load changes. The WRSSG system uses a PWM converter in the aero-engine starting process and can reuse the power circuit as a PWM rectifier for high-voltage direct current (HVDC) power generation, thus simplifying the system structure, volume, and weight. The mathematical model of the WRSSG system with the PWM rectifier is introduced. Based on the system model, the proportional-integral (PI) controller of the armature current loop is designed. The nonlinear PI controller of the excitation voltage loop is also illustrated. A 15-kW WRSSG system based on the PWM rectifier is implemented. The AFCT control strategy and its high dynamic performance are verified by experiments. The simple system structure and distinguished dynamic performance of the PWM rectifier with AFCT control can make the WRSSG system more competitive in aircraft applications.]]></description>
      <pubDate>Mon, 07 Oct 2024 08:38:35 GMT</pubDate>
      <guid>https://trid.trb.org/View/2403942</guid>
    </item>
  </channel>
</rss>