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Viewing 1 to 30 of 114
2016-04-05
Technical Paper
2016-01-1057
Masaya Miyazawa, Kei Mochizuki, Kondo Takashi
To achieve lightweight, low friction and fuel efficient engine, the crankshaft is required to be designed lightweight, small-diameter shaft, long stroke. In this case, vibration of the crankshaft is increased by reduction of shaft stiffness. The conventional way of dealing with this increased vibration used to be to add an inertia mass ring or a double mass damper. Such an approach, however, increases weight, making the balance of weight reduction and vibration reduction less readily achieved. This paper reports on a method of reducing crankshaft vibration without increasing weight by tuning the shape of the crankshaft damper pulley hub. The main factors of the crankshaft vibration increase were investigated that it is coupled mode of the crankshaft bending and the crankshaft damper pulley bending. This was ascertained from the crankshaft behavior measurement and the crankshaft vibration contribution analysis.
2016-04-05
Technical Paper
2016-01-0488
Takashi Izawa, Motohiko Koushima
The sliding bearing generally used for engine main bearing in passenger vehicles are known to show a reduction in seizure limit performance relative to ideal conditions when the bearing are subjected to the influence of various noise factor (factor exerting negative influence) under actual operating conditions. Recent passenger vehicle engine development has sought to meet the demand for higher fuel economy and specific torque by reducing the width of the bearing and increasing the input load. The environment in which bearing are used is growing ever more demanding. The influence of noise factor on seizure limit performance is believed to be on an increasing trend in conjunction with this change. The importance of ascertaining that influence is growing greater, but few attempts have been made to verify those factors quantitatively.
2016-04-05
Technical Paper
2016-01-1321
Masahiro Fukazawa, Tsuyoshi Murao, Shingo Unigame
The CAE method to predict the vibration transfer function of the fluid engine mount on a vehicle with sufficient precision and calculation time without prototype cars was developed. The transfer function is given in the following steps.First, rubber deformation form under the power train weight loaded must be predicted. It’s obtained by using a reduction model of engine mount, as a unit, which doesn’t have its fluid sealed inside, with the technique to get static spring characteristics in a non-linear relationship. Second, Young’s modulus and structural damping coefficient for the deformed rubber must be given. As for these characteristics, ignoring the relations between these values and strain, the constant values are used. This considerably reduced computation time and model size.Next, the reduction model and the fluid model which actually the engine mount has must be combined to express actual product.
2016-04-05
Journal Article
2016-01-0506
Daisuke Tomomatsu
The change from metal to resin parts is an important technological development for reducing vehicle weight. Honda fuel piping uses metal pipes for the long under-floor section to both ends of which shorter resin piping is joined. Different resin materials have been used for the resin piping at the two ends. The piping at the front is made from a high-temperature-specification resin material for the 120°C environment of the engine compartment, while the piping at the rear is a low-temperature-specification resin material for the 80°C environment around the fuel tank. Although resin material has a lower specific gravity and is lighter than metal material, it has the drawback of higher cost. The long under-floor section was therefore left in metal material, sacrificing that aspect of weight reduction.
2015-12-08
Article
Electric and hybrid vehicles driving at low speeds are so quiet they can pose a danger to sight-impaired pedestrians crossing the street. In this episode of SAE Eye on Engineering, Senior Editor Lindsay Brooke looks at the U.S. government’s plans to require electrified vehicles to emit a warning sound when traveling at less than 18 mph (29 km/h).
2015-12-03
Article
The SUV continues to win customers and a compact sport utility may be the ideal package. In this episode of SAE Eye on Engineering, Senior Editor Lindsay Brooke looks at the top sellers in the compact SUV boom. 
2015-12-01
Article
The 2016 Honda Civic features selectively-tempered “soft zone” technology in the B-pillars and rear frame rails, allowing zones within a single frame piece to have more ductile properties than the surrounding ultra-high-strength hot-stamped steel. The technology minimizes parts count and saves 15.6 lb (7 kg) compared to the previous-generation Civic.
2015-11-13
Article
Aerodynamic experts are cautiously optimistic that a long-awaited leap in vehicle fuel efficiency is advancing toward near-term production: the replacement of the two exterior mirrors with camera-based streaming-vision technology—at no overall cost penalty.
2015-11-02
Article
The knock on fusion power is that “It is the energy source of the future, and it always will be.” It has seemed like the same criticism could be levied against fuel cell vehicles, as their seemingly magical ability to turn stored hydrogen and atmospheric oxygen into motive power for personal transportation — with only water as a by-product emission —has remained tantalizingly out of reach for decades.
2015-10-21
Article
The 2016 SUV is nearly 300 lb (136 kg) lighter than its predecessor, yet maintains its high safety standard thanks to a new-generation ACE body structure and the available Honda Sensing suite of advanced safety and driver-assistance technologies. Honda also debuted its digital product development-and-manufacturing process with the new Pilot.
2015-10-14
Article
The three arch-competitors formed the new CMC to speed development of intelligent bikes and their integration into the V2V and V2I ecosystem.
2015-09-29
Article
The company sought to recapture some of the glory of its motorcycling and open-wheel-racing heritage at the 2015 Frankfurt Motor Show, introducing the Project 2&4, a tiny go-kart of a concept vehicle that marries the company’s MotoGP powerplant with a four-wheeled conveyance. Hence, two and four wheels of the project’s name.
2015-09-16
Article
After being widely panned for cutting cost on its previous Civic models, Honda committed the resources where it counts to create a world-beating C-car.
2015-09-08
Article
The quest to make new vehicles lighter involves much more than just using aluminum and plastics. In this episode of SAE Eye on Engineering, Senior Editor Lindsay Brooke looks at "ultra-high-strength" steels, the new materials that are lighter and vastly stronger than automotive steels of the past.
2015-09-03
Article
Honda has developed two new full-size side-by-side (SxS) models, the Pioneer 1000 and 1000-5, to complement its 2016 lineup, which also includes the Pioneer 700/700-4 and 500 models. The Pioneer 1000 is powered by an inline, twin-cylinder, Unicam 999-cc engine that was developed specifically for this application.
2015-08-25
Article
For automakers, earning a 5-star safety rating in the government and insurance industry tests is a major source of pride. In this episode of SAE Eye on Engineering, Senior Editor Lindsay Brooke looks at the latest vehicle to earn 5 stars: Honda's 2016 Pilot.
2015-07-16
Article
An important element in its recent world tour was the participation of the new HondaJet at the European Business Aviation Convention and Exhibition (EBACE), held at Geneva, which was its first European appearance.
2015-05-08
Article
The HR-V subcompact SUV mixes the Fit platform with Civic and CR-V powertrain systems.
2015-04-30
Article
New AWD systems from BorgWarner and Honda deliver significant improvements in efficiency, as well as vehicle dynamic performance.
2015-04-28
Article
More and more, Honda vehicles are getting their start on the CAD screens of American designers based in central Ohio, rather than those in Japan. In this episode of SAE Eye on Engineering, Senior Editor Lindsay Brooke looks at the busy year for Honda engineers in Raymond, OH. 
2015-04-28
Article
FCEV advocates point to new stack platforms with greater power density, and manufacturing strategies aimed at building production scale.
2015-04-22
Article
Automotive planners and developers are working overtime to provide more autonomous features and functions, but there’s still plenty of uncertainty surrounding driverless cars.
2015-04-14
Technical Paper
2015-01-1009
Cameron W. Tanner, Kenneth Twiggs, Tinghong Tao, David Bronfenbrenner, Yoshiaki Matsuzono, Shinichiro Otsuka, Yukio Suehiro, Hiroshi Koyama
Abstract Regulations that limit emissions of pollutants from gasoline-powered cars and trucks continue to tighten. More than 75% of emissions through an FTP-75 regulatory test are released in the first few seconds after cold-start. A factor that controls the time to catalytic light-off is the heat capacity of the catalytic converter substrate. Historically, substrates with thinner walls and lower heat capacity have been developed to improve cold-start performance. Another approach is to increase porosity of the substrate. A new material and process technology has been developed to significantly raise the porosity of thin wall substrates (2-3 mil) from 27-35% to 55% while maintaining strength. The heat capacity of the material is 30-38% lower than existing substrates. The reduction in substrate heat capacity enables faster thermal response and lower tailpipe emissions. The reliance on costly precious metals in the washcoat is demonstrated to be lessened.
2015-04-14
Technical Paper
2015-01-0733
Nichole Verwys, Jesse Fritcher, Thomas DeMass
Abstract Dark, high gloss decorative finishes (i.e. piano black) are gaining increased application and demand in vehicle interiors; due to interior stylists' desire for this look. One significant concern with this trend is that scratches, and other appearance related defects such as orange peel (waviness), are more apparent to the customer. To address this issue, a highly scratch-resistant 2K clearcoat formulation was developed to minimize visible surface scratches, while also yielding minimal orange peel and exceptional DOI (distinctness of image); all while being applied using typical application techniques in the part finishing market. This output was accomplished by first benchmarking the consumer electronics market for appearance and scratch resistance, and then setting targets through that research.
2015-04-14
Technical Paper
2015-01-0880
Masanobu Takazawa, Kiminori Komura, Toru Kitamura
Abstract Amidst the rising demand to reduce CO2 and other greenhouse gas emissions in recent years, gasoline homogeneous-charge compression ignition (HCCI) has gained attention as a technology that achieves both low NOx emissions and high thermal efficiency by means of lean combustion. However, gasoline HCCI has low robustness toward intracylinder temperature variations, therefore the problems of knocking and misfiring tend to occur during transient operation. The authors verified the transient operation control of HCCI by using a 4-stroke natural aspiration (NA) gasoline engine provided with direct injection (DI) and a variable valve timing and a lift electronic control system (VTEC) for intake air and exhaust optimized for HCCI combustion. This report describes stoichiometry spark ignition (SI) to which external exhaust gas recirculation (EGR) was introduced, HCCI ignition switch control, and changes in the load and number of engine revolutions in the HCCI region.
2015-04-14
Technical Paper
2015-01-1378
Takeshi Sasaki, Tatsuya Ohmaru, Taisuke Goto
Abstract We developed a windshield washer system that enhances washing performance while maintaining low consumption of windshield washer fluid. The system reduces user stress by shortening the amount of time required to remove dirt and maintaining visibility through the windshield. We analyzed the mechanism through which the windshield wiper and windshield washer remove dirt from the glass surface to improve cleaning efficiency. The mechanism consists of a sequence in which the windshield washer fluid splashes down on the glass surface and lifts dirt which is then wiped away by the windshield wiper blade. We defined the amount of windshield washer fluid needed and the time from splashdown to wiping required to lift dirt and wipe it away with the wiper. Based on this mechanism, we developed a wiper arm with built-in washer nozzles.
2015-04-14
Technical Paper
2015-01-1122
Kengo Yabe, Toru Inagaki, Takashi Kondo
Abstract Seat vibration when a vehicle is idling or in motion is an issue in automobile development. In order to reduce this vibration, dynamic damper or inertia mass is widely used. These countermeasures increases vehicle's weight and causes bad fuel-efficiency. Some new ways to reduce the vibration without weight increase are needed. One of that is the floating seat. Seat vibration has been reduced by controlling seat resonance frequencies. In order to control resonance frequency, the structures of the seat-mounting unit are replaced with floating structures using rubber bushings. It was demonstrated that partially replacing the mounting unit with floating structures makes it possible to control the resonance frequencies of the entire seat. The issue of balancing vibration reduction with strength and durability and crash safety performance caused by the fitting of rubber bushings to the seat-mounting unit was addressed using stopper structures optimized for each type of input.
2015-04-14
Journal Article
2015-01-1567
Scott Bradley Zagorski, Tomoya Ushimura, James Post
Abstract In this research, a three degree-of-freedom (DOF) rack-type electric-based power steering (EPS) model is developed. The model is coupled with a three DOF vehicle model and includes EPS maps as well as non-linear attributes such as vibration and friction characteristics of the steering system. The model is simulated using Matlab's Simulink. The vibration levels are quantified using on-vehicle straight-line test data where strain-gauge transducers are placed in the tie-rod ends. Full vehicle kinematic and compliance tests are used to verify the total steering system stiffness levels. Frequency response tests are used to adjust tire cornering stiffness levels as well as the tire dynamic characteristics such that vehicle static gain and yaw natural frequency are achieved. On-center discrete sinusoidal on-vehicle tests are used to further validate the model.
2015-04-14
Journal Article
2015-01-1321
Shigetaka Kameyama, Shigeo Fujita, Shinichi Kaji
Abstract Recently vehicle development timeline is becoming shorter, so there is an urgent need to be able to develop vehicles with limited resources. This means the efficiency of the body structure development process must be improved. Specifically it is important to reduce the amount of design re-work required to meet performance targets as this can have a large influence on the body development time. In order to reduce the afore mentioned design re-work, we developed simple calculation models to apply a “V-Flow Development Process” to the preliminary stage design of the automobile body structure. The “V-Flow” advantages are as follows: (1) simple and easy to use, (2) defects are found at early stage, (3) avoids the downward flow of the defects. The advantage of preliminary stage design is that there is design flexibility since not many specifications have been determined yet.
2015-04-09
Article
Honda’s next-generation Civic will debut a sporty new design language, more efficient and spirited powertrains—and serve as the lead application for Honda’s new Global Compact platform that will also underpin the next-generation Accord as well as the HR-V crossover.
Viewing 1 to 30 of 114

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