JSAE Review最新文献

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BRAKING TORQUE TRANSFER SIMULATION BY DYNAMIC PROGRAMMING 基于动态规划的制动转矩传递仿真

JSAE Review

Pub Date : 2014-08-05 DOI: 10.1504/IJVD.1984.061098

M. Inoue, N. Takeda, T. Gou

It is very difficult to evaluate the proportion of braking torque using the conventional method, because the braking effectiveness at each wheel changes independently with the passage of time as a result of use of a vehicle. This phenomenon is herein called "braking torque transfer". To solve these problems a method has been developed in which the factors causing braking torque transfer are examined and combined by a statistical method and programmed, thereby permitting more accurate evaluation in a shorter period of time. (TRRL)

由于车辆在使用过程中，每个车轮的制动效果会随着时间的推移而独立变化，因此用传统的方法来评估制动力矩的比例是非常困难的。这种现象在这里被称为“制动扭矩传递”。为了解决这些问题，已经开发了一种方法，其中通过统计方法检查和组合导致制动扭矩传递的因素并进行编程，从而允许在更短的时间内进行更准确的评估。(TRRL)

引用次数: 0

HEAVY DUTY TRUCK RIDE-COMFORT ANALYSIS BY COMPUTER SIMULATION 重型卡车乘坐舒适性的计算机仿真分析

JSAE Review

Pub Date : 2014-08-05 DOI: 10.1504/IJVD.1986.061180

N. Sakuma, I. Kadono, M. Dohi, H. Nakai

The vibration and ride–comfort of some heavy duty trucks was analyzed by the simple model developed by finite element method. Ride–comfort of heavy duly trucks is significantly influenced by bending vibration of the frame, so the frame was modeled by a BAR element having a number or different cross sections, so a separate model as a rigid body was established. For non–linear components such as mounting rubber, tyre, leaf spring, the best data from specific areas of vibration were selected for inputting into the model and corrections were added to the model. For modeling check, frequency response of consolidating several kinds of component models was calculated in the initials stage of the system model. Each component model was consolidated with the frame model to obtain the system model. From this system model calculation results of frequency response and PSD response were obtained for making comparison will actual test and were found to be sufficient to make qualitative evaluation of ride–comfort. Consequently this simulation method was used in design stages, such as development or cab–suspension and improvement or ride–comfort of tractor pulling trailer.

采用有限元法建立了简单模型，对某重型载货汽车的振动和乘坐舒适性进行了分析。车架的弯曲振动对重型载重汽车的行驶舒适性影响较大，因此采用多截面或不同截面的BAR单元对车架进行建模，建立单独的刚体模型。对于安装橡胶、轮胎、钢板弹簧等非线性部件，选择特定振动区域的最佳数据输入模型，并对模型进行修正。为了进行建模校核，在系统模型的首字母阶段，计算了几种构件模型合并后的频率响应。将各构件模型与框架模型合并，得到系统模型。从该系统模型中得到了频率响应和PSD响应的计算结果，并与实际试验进行了比较，发现足以对乘坐舒适性进行定性评价。因此，该仿真方法可应用于牵引车驾驶室悬架的开发和乘坐舒适性的改进等设计阶段。

引用次数: 3

A demonstration of prototype near-neat-methanol vehicle controlled fleet test 近甲醇汽车控制车队试验样机演示

JSAE Review

Pub Date : 2014-08-04 DOI: 10.1504/IJVD.1991.061683

T. Hoshino, N. Iwai

In 1984, the Japanese Ministry of International Trade and Industry established a research project with the aim of implementing full–scale verification tests concerning fuel specification, development of engines that use methanol fuel, and problems related to storage and distribution of fuel from the viewpoint of safety, economics and lower pollution. As a result of experimental investigations carried out so far, methanol with 15% petrol (also known as M85) was determined to be optimal for Otto–type mechanical engines. This paper describes the controlled fleet test, which began in March 1989 and is to be conducted for three years with eight prototype 12 vehicles running on M85. The vehicles are supplied by eight Japanese automobile manufacturers. The purpose of this test is to accumulate data concerning vehicle driveability, durability, exhaust emissions, fuel economy, engine lubricating oil and fuel stability. These data will be used to investigate the feasibility and economy of M85–fuelled vehicles.

1984年，日本国际贸易和工业部设立了一个研究项目，目的是从安全、经济和低污染的角度出发，对燃料规格、使用甲醇燃料的发动机的开发以及与燃料储存和分配有关的问题进行全面核查试验。根据迄今为止进行的实验研究结果，15%汽油(也称为M85)的甲醇被确定为奥托式机械发动机的最佳选择。本文描述了1989年3月开始的控制车队试验，将在M85上进行为期三年的8辆12辆原型车试验。这些车辆由八家日本汽车制造商提供。该测试的目的是积累有关车辆驾驶性能、耐久性、废气排放、燃油经济性、发动机润滑油和燃油稳定性的数据。这些数据将用于研究m85燃料汽车的可行性和经济性。

引用次数: 1

Analysis of the Steady Flow Characteristics through a Poppet Valve 锥阀稳态流动特性分析

JSAE Review

Pub Date : 2004-03-08 DOI: 10.4271/2004-01-1676

R. Gault, D. Thornhill, R. Fleck, D. O. Mackey, G. Chatfield

This paper describes the flow characteristics in the near throat region of a poppet valve under steady flow conditions. An experimental and theoretical procedure was undertaken to determine the total pressure at the assumed throat region of the valve, and also at a downstream location. Experiments of this type can be used to accurately determine the flow performance of a particular induction system. The static pressure recovery was calculated from the near throat region of the valve to the downstream location and was shown to be dependent on valve lift. Total pressure profiles suggest that for this particular induction system, the majority of pressure loss occurs downstream of the valve for lift/diameter ratios up to 0.1, and upstream of the valve for lift/diameter ratios greater than 0.1. Negligible pressure recovery was shown to exist from the cylindrical periphery of the valve head to the downstream location for all valve lifts, indicating that the flow had probably separated completely from the trailing edge of the valve seating face. The calculated discharge coefficients, based on the geometric throat static pressure measurements on the seating face, were in general less than those determined using the downstream static pressure, by as much as 12% in some instances towards the valves lower mass flow rate range.

本文研究了稳态流动条件下锥阀近喉部的流动特性。进行了一个实验和理论程序，以确定在假设的阀喉区，也在下游位置的总压力。这种类型的实验可以用来准确地确定一个特定的感应系统的流动性能。计算了从阀门近喉道区域到下游位置的静压恢复，结果表明，静压恢复与阀门升程有关。总压力曲线表明，对于这种特殊的感应系统，大部分压力损失发生在升程/通径比大于0.1的阀门下游，而升程/通径比大于0.1的阀门上游。结果表明，从阀头的圆柱形外围到下游位置，所有阀门举升的压力恢复都可以忽略不计，这表明流体可能已经完全从阀门阀座表面的后缘分离。根据阀座表面的几何喉道静压测量结果计算出的排放系数，通常比使用下游静压确定的排放系数要小，在某些情况下，在阀门较低质量流量范围内，其误差可达12%。

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引用次数: 6

Development of a Sensor-less Electro-Hydraulic Valve Actuator for a Cam-less Engine 无凸轮发动机无传感器电液阀致动器的研制

JSAE Review

Pub Date : 2004-01-01 DOI: 10.5739/ISFP.2005.256

Hirohisa Tanaka, Nozomi Toyoda

A fully electronically controllable valve-actuator has potentials of improving volumetric efficiency at gas exchange, and of presenting variable compression-ratio. This paper describes a new type of hydro-mechanical position-servo electro-hydraulic valve actuator for a cam-less engine. The piston is positioned hydro mechanical feedback mechanism, which balances the flow rate of the feedback slot to the pilot valve. The feedback-slot opens its area in proportion to the piston displacement. This mechanism succeeds to decelerate the landing-velocity of 0.2m/s at a working speed of 1.0m/s for valve lift of 12mm, and to actuate the valve at a volumetric efficiency of 95% within lag times of opening 18ms and closing 8ms, that is possible to work at an equivalent engine rotational speed of 2100rpm. The actuator is energized by the hydraulic power source of flow-rate of 6.7L/min and pressure of 14MPa.

全电控阀门执行机构具有提高气体交换的容积效率和实现可变压缩比的潜力。介绍了一种用于无凸轮发动机的新型液压机械位置伺服电液阀执行机构。活塞定位为液压机械反馈机构，平衡反馈槽流向先导阀的流量。反馈槽的打开面积与活塞位移成正比。该机构能够在气门升程为12mm时，以1.0m/s的工作速度将着陆速度降至0.2m/s，在开启18ms和关闭8ms的滞后时间内，以95%的容积效率驱动气门，在当量发动机转速为2100rpm的条件下工作。执行器由流量6.7L/min、压力14MPa的液压动力源驱动。

引用次数: 1

Development of a tire pressure monitoring system for motorcycles 摩托车胎压监测系统的研制

JSAE Review

Pub Date : 2003-10-01 DOI: 10.1016/S0389-4304(03)00085-7

T. Yamagiwa, Masayoshi Orita, T. Harada

引用次数: 10

Steady-state paint flow under high centrifugal force: 高离心力下的稳态油漆流动：

JSAE Review

Pub Date : 2003-10-01 Epub Date: 2003-09-10 DOI: 10.1016/S0389-4304(03)00075-4

Shigenori Kazama

A rotary atomizer, which is generally used in car body painting, atomizes liquid paint into micro-particles at a rate of several hundred ml/min. The diameter of the micro-particles is not uniform, but has a broad size distribution ranging from near zero to over several hundreds of microns. It is known that this distribution affects transfer efficiency and paint finish quality. This paper discusses the relationship between liquid paint flow and atomization when the inner shape of the bell was changed, focusing on paint flow just before discharge from the bell edge.

通常用于车身喷漆的旋转雾化器以几百毫升/分钟的速度将液体油漆雾化成微粒。微粒的直径不均匀，但具有从接近零到超过数百微米的宽尺寸分布。众所周知，这种分布影响转移效率和油漆饰面质量。本文讨论了当钟形罩内部形状发生变化时，液体涂料流动与雾化之间的关系，重点讨论了涂料从钟形罩边缘排出前的流动。

引用次数: 14

Independent wheel torque control of small-scale electric vehicle for handling and stability improvement 小型电动汽车的独立车轮扭矩控制，以提高操控性和稳定性

JSAE Review

Pub Date : 2003-10-01 Epub Date: 2003-09-12 DOI: 10.1016/S0389-4304(03)00080-8

Motoki Shino , Masao Nagai

This paper examines the feasibility of the proposed control in a small-scale electric vehicle with two independent motors equipped at the rear axles. The direct yaw moment control system is designed with the application of model matching control theory. For realizing the proposed system in an actual electric vehicle, it is necessary to estimate the side slip angle instead of measuring it directly. A speed-dependent observer is proposed in this paper. Experiments using actual small-scale electric vehicle are carried out to verify the effectiveness of the proposed chassis control system on lateral stability in a J-turn test and lane change tests.

本文在一辆小型电动汽车上检验了所提出的控制的可行性，该汽车的后桥上装有两个独立的电机。应用模型匹配控制理论设计了直接横摆力矩控制系统。为了在实际电动汽车中实现所提出的系统，有必要估计侧滑角，而不是直接测量。本文提出了一种速度相关观测器。在J型转弯试验和变道试验中，使用实际的小型电动汽车进行了实验，以验证所提出的底盘控制系统对横向稳定性的有效性。

引用次数: 106

Development of a motor-assisted 4WD system for small front-wheel-drive vehicles 用于小型前轮驱动车辆的电机辅助四轮驱动系统的开发

JSAE Review

Pub Date : 2003-10-01 Epub Date: 2003-09-13 DOI: 10.1016/S0389-4304(03)00084-5

Kimitaka Nakamura , Hajime Kosaka , Keiji Kadota , Kouichi Shimizu

The objective of this paper is to introduce a newly developed motor-assisted 4WD system for small front-wheel-drive vehicles. We studied the performance needed by 4WD vehicles in daily use, especially in snowy areas, and concluded that start-off traction on low-μ roads is the most important requirement. This new system is composed of a simple motor drive unit with minimum driving force, but through integrated control of the engine and motor torque, it provides ample 4WD performance on snowy and icy roads and on sandy beaches.

本文的目的是介绍一种新开发的用于小型前轮驱动车辆的电机辅助四轮驱动系统。我们研究了四轮驱动汽车在日常使用中所需的性能，特别是在雪地地区，并得出结论，在低μ道路上启动牵引力是最重要的要求。这个新系统由一个简单的电机驱动单元组成，驱动力最小，但通过对发动机和电机扭矩的集成控制，它在雪地和结冰的道路上以及沙滩上提供了充足的四轮驱动性能。

引用次数: 14

Fundamental research about the effectiveness of a safe driving support system with information provision 具有信息提供的安全驾驶支持系统有效性的基础研究

JSAE Review

Pub Date : 2003-10-01 Epub Date: 2003-09-12 DOI: 10.1016/S0389-4304(03)00083-3

Kohei Okabe, Toshihiro Hiraoka, Osamu Nishihara, Hiromitsu Kumamoto

Recently, safe driving support systems such as AHS-i have been proposed. In this paper, we investigate the relationship between the reliability of information provided from a safety system and the driver's unsafe action, and then quantitatively analyze the reliability level required for the system to reduce traffic accidents.

最近，已经提出了诸如AHS-i之类的安全驾驶支持系统。在本文中，我们研究了安全系统提供的信息的可靠性与驾驶员的不安全行为之间的关系，然后定量分析了该系统减少交通事故所需的可靠性水平。

引用次数: 5

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