Easy and fun to use, suspension pro will give you results immediately with no tedious setup and learning. I know that the motion ratio changes through wheel travel, but thats not the scope of this question. Were the right and left hand side control arms installed on the correct sides of the car. The last option, and most commonly used, is a link controlled beam axle suspension design such as the one shown in figure 1 typical rock crawling obstacle. How much can be gained by optimizing a suspension design. The design of the upright or knuckle determines the geometry on the outboard side of the suspension. Below is a link to a chevelle form that may also be able to help. Front and rear suspension analysis simulation software program. Jan 26, 2016 there are a number of software to design a suspension system.
Software for designing and analyzing suspension systems and geometry. I know i will be overlooking some things, but looking at the layout of the current project a motorbike powered formulalike car ive. The process entails selecting appropriate vehicle level targets. The g1 glider is inboards solution for the next generation of lightweight electric vehicles. Complete graphs and reports are included, and several new. The baseline suspension tune was analysed using r ace software and the bump camber curve from the r ace pdf report is shown below. Inboard enables access to a safe, convenient, and reliable commuting alternative. The baseline bump camber is 15 degm and is below the target range. Salinas university of missouri rolla abstract this paper is an introduction to formula sae fsae suspension and frame design based on the experience of the design team at umrolla. The new buggy is based around a unique inboard suspension system with a list of eyecatching specs and features. Jan 29, 2018 suspension geometry part 1 camber, toe, caster, kpi, scrub radius sk8215. Speedwiz suspension pro has all the car suspension calculations and suspension simulations you need to build and modify great cars, trucks, motorcycles, and boats. Also, it offered a lower cg height than a pushrod installation and the ability to. For example, the ball joint location is limited to the.
The g1 glider is inboard s solution for the next generation of lightweight electric vehicles. Optimumkinematics developed by optimumg engineers is a suspension and design analysis software. Most inboard setups use bell crank mechanisms and this improves your flexibility in setting and tuni. Hi again, in regards to calculating the motion ratio of an inboard suspension system, if the pushrod was attached to the wishbone at 80% of the distance along it between where the wishbone mounts to the chassis and the upright, would this have a motion ratio of 0.
The design process began with the selection of a suspension configuration, geometries, and kinematics, which were driven in part by tire data, desired bulk vehicle dynamics characteristics, and. Suspension design for other vehicles is similar, though the process may not be as well established. Susprog3d is a complete 3d software package for the design, setup, evaluation and visualization of race and road car suspension systems now with support for 30 different suspension types. Nicholas phan inboard suspension designer spartan racing. I am looking at making changes to my race car this offseason. These cylinders are for single and dual rudder vessels with two axis articulation and easy autopilot interface. Various parameters, their design importance and the process to optimize them according to suspension design goals.
Introduction to formula sae suspension and frame design. Easy and effective virtual prototyping of vehicle suspensions. In the option design, the upper control arms inboard points have been moved down 20 mm. It appears i used suspension number from one of the endless iterations for the chassis and a different iteration for the fixture. Space limitations and the need to reduce weight have prompted some changes in railway bogie design. This system is used for its superior ability to articulate without having components bind, and its relative ease of design and manufacture. No harm done as neither the aarms nor pivots are in place yet.
The study describes design, analysis and optimization of a suspension system for an offroad buggy. Syracuse university honors program capstone projects. In this example we are going to look at a front suspension for a generic race car. The design freedom of pushrod suspension is great since it allows achieving all the goals. Suspension kinematics and its effect on performance optimumg. Design of suspension system for formula student race car core. Pdf the focus of the paper is on designing a suspension system for a medium. Producing quality computer tools for racers and engine builders since 1986. In simulating and prototyping a formula sae race car suspension system, the suspension design using the parametric software, reynard kinematics, was discussed. Design and development of steering knuckle with spindle. Design of a suspension system and determining suspension parameters. Inboard suspension for the gtr page 2 r35 gtr nissan. In the case of open wheel racing cars, there is a good aerodynamic advantage by moving the damper and other components out of the air stream.
Aarms, bell crank, pushrod, ansys, spring and dampers. A baseline setting and an option setting, the latter lowers the inboard pickup points for the upper control arms about 20 mm 34 in. This software is specifically designed with a userfriendly interface that makes the process of computer aided suspension design and analysis much faster and more convenient. Some software includes kinematic capabilities that simulate vehicle dynamics using the designed suspension.
Scott, a long time fabricator and driver for brunton auto, was driven to produce a better performing car on the street and track. The suspension analyzer does a complete 3d suspension analysis, including bump steer, ackerman, caster gain, anti dive, tire scrub, camber gain and much more. The final design was also strong enough and do not show any signs of wear or cracking. Page 1 of 2 inboard suspension for the gtr posted in r35 gtr. The paper not only focusses on step by step design for a double wishbone type suspension but will also show the use and role of kinematics software in determining the optimized suspension of the car. Suspension geometry part 1 camber, toe, caster, kpi, scrub radius sk8215. Power supply, instrumentation amplifier, auto offset zeroing, low pass filter, 60hz notch filter, and pulse stretching circuits. Some of what i believe has been my best design work is the suspension and steering system on the university of calgary solar car teams fifth generation car. Design, analysis, and verification of an openwheeled. Research paper on design and analysis double wishbone. Mro racing has announced the inspire4 110scale 4wd buggy kit, in which they aim to release in late2019. Inboard suspension and shock hysteresis automotive. Zoom in on the suspension layout drawing, or move the drawing up, down, left or right.
Lotus shark suspension analysis software is used for. An abaqus finite element model was developed for the right front suspension. Suspension geometry part 1 camber, toe, caster, kpi, scrub. For windows 7, 8 and 10 with opengl see the faq for more details faq for more details. Your feedback will be important as we plan further development of our repository. Pdf design of a suspension system and determining suspension. Design and manufacture of an adaptive suspension system a major qualifying project report submitted to the faculty of worcester polytechnic institute this report represents the work of wpi undergraduate students submitted to the faculty as evidence of completion of a degree requirement. Youll always have some level of misalignment in bump or rebound for this configuration. Found some more picsthat was a really great threadproject. Using an inboard suspension design with single pushrod and a rocker actuating the damper, the only masses considered unsprung are the pushrod and the rocker, the damper is now considered fully sprung. Did you install different upper andor lower control arms. Inboard suspension for the gtr r35 gtr nissan gtr heritage. I have an idea but would like some imput from others that have more experience with inboard suspension. This paper present design of the suspension mechanism intended to use in.
Typical rear suspension screen, here analyzing an angled 4 link rear suspension and driveshaft movement and u joint angles. Design, analysis and optimization of suspension system for. Design, analysis and optimization of suspension system for an off road car. Solar car suspension and steering systems nick elderfield. Page 2 of 2 inboard suspension for the gtr posted in r35 gtr. Pushrod suspension designs are used mostly among open wheel race cars because of the aerodynamic and.
This includes both light rail vehicles, as well as highspeed and very highspeed. There are 10 key factors to be considered when designing a suspension system, whether its for a single seater or sports prototype, and part of the skill of the designer lies in reconciling the conflicts between them. Were just discussing the motion ratio at rest for now. My plan is to build a platform with inboard pushrod suspension, a swapable engine cradle for upgrades 50cc first, 1200cc later, and a full cage safety third. Apr 01, 2020 speedwiz suspension pro has all the car suspension calculations and suspension simulations you need to build and modify great cars, trucks, motorcycles, and boats. Added the pushrodpullrod to bellcrank angle, shock to bellcrank. Suspension design software is invaluable in car or truck design as it does the heavy lifting when it comes to the many iterations of manual. There are innumerable variations to this design, but a typical pushrod suspension utilizes a double wishboneandcoilover setup, with the. The university of akron 2015 sae zips baja offroad racing. Design of a suspension system and determining suspension.
The objective of the composite parts for a fsae racecar project was to design, analyze, manufacture, and test a composite monocoque chassis, pedal box, and aerodynamic undertray. What are the advantages of inboard suspension in cars. The classis 60s sports and racing car rear suspension. Design and integration of suspension, brake and steering. It provides a stable platform from which to control the vehicle. Each component was designed to improve vehicle performance levels by increasing stiffness, decreasing mass, andor providing additional grip. Design, analysis and optimization of suspension system for an. Mro racing announces new inspire4 110scale 4wd buggy. The new location was run through the suspension software to make sure. Of course, one aims to avoid compromise in any direction. Any help clearing this up would be very useful as the motion ratios our suspension design software calculates susprog 3d are not something we can match in our calculations. The scrub radius is the lever arm for braking forces into the suspension. Introduction to formula sae suspension and frame design edmund f.
Tuning linked kpis bump camber and roll centre height. Unsprung mass of an inboard rocker suspension design. Reporting to the head of suspension design the successful candidate will take ownership of a particular area of the suspension system. Diagram ku1 shows an example of an independent wishbone. Design and development of a new suspension system for the. Unsprung weight, or the weight comprised by tire, wheel and suspension affects how well the tire follows the bumps and dips in the road surface.
Lower lateral link, upper reversed aarm, twin trailing links rear a variation on the above. The roll centre height for this design is 85mm and is in the target range. First poster was cris psi from power stream industries and the hawk car. Its very hard to list down all the calculation involved in the suspension as it depends upon your imagination and vehicle understanding. The mspec was designed and engineered by the companys new owner, scott minehart. Is the inboard glider the high end electric scooter of 2020. The stalker mspec features an all new designed chassis with double wishbone suspension with inboard push rod shocks, front and rear. Susprog3d suspension by design is a complete software package enabling the. Suspension by design windows vista 32bit and 64bit, windows 7 32bit and 64bit. Bump camber or camber gain is a measure of suspension camber change with wheel travel and is expressed in degrees of camber change per metre of suspension travel degm. My main stumbling point right now is how to design the suspension. Design and manufacture of an adaptive suspension system.
Easy and fun to use, suspension pro will give you results immediately with no tedious setup and learning chores. Sep 20, 2018 but to add an even smoother ride, inboard has included coilover suspension in the design another feature rarely found in electric scooters. Whilst the physical design of the inboard glider looks awesome, inboard have put some serious work into the software capabilities and developer platform, its really built with the future in mind. The suspension is designed for a rough terrain giving optimum camber, caster, toe, antidive, roll centre and ackermann geometry variations. They allowed for the inboard mounting of the suspension and smooth, progressive suspension travel. The base valve monotube design reduces this issue as there is a pressure drop across the base valve, reducing the pressure at the separator. Design of suspension system for formula student race car.
This paper presents the procedure of design and analysis both kinematic and dynamic of the front double aarm pushrod suspension system for a formula student race car. For windows 7, 8 and 10 with opengl see the faq for more details faq for more. Overall the final design of the rockers performed exceptionally well. Design of three and four link suspensions for off road use. In a conventional outboard damper suspension design, the part of the springdamer attached to the lower wishbone is unsprung mass. Currently i have a traditional upperlower control arm with a 7 stroke coil over bilstein asn shock. But still i am listing down the important one in my view. Using lighter wheels, tires, and suspension components will reduce the weight. Design and integration of suspension, brake and steering systems for a formula sae race car final report mark holveck 01 rodolphe poussot 00 harris yong 00 submitted to the department of mechanical and aerospace engineering, princeton university in partial fulfillment of the requirements of undergraduate independent work.
So, a few of the hardcore racers posted over the years about the rear suspension of the gtr being a serious problem for low speed grip and handling. Abstract the paper explains design methodology and flow in a suspension is one of the most vital subsystems of an automobile. Is the inboard glider the high end electric scooter of. The mount points on the chassis and wishboneslinks form the inboard side of the suspension, and provide their own contribution to the overall geometry of the suspension. Is a big design change like this important in the first place. It provides a way to isolate the chassis and driver from the shocking jolts that the tires experience going over anything but a glasssmooth surface. Roll camber is calculated in the same way as bump camber except that the wheel travel is a result of body roll. Automotive suspension design is an aspect of automotive engineering, concerned with designing the suspension for cars and trucks. Vertical distance of upper ball joint wrt inboard point a vertical distance of lower ball joint wrt inboard.
Its many automotive suspension calculations and suspension graphs make it easy to find out what you need to know. Another feature unique to the glider is its low deck. The datum is the inside face of the inboard rim flange. Easily and effectively create vehicle suspension designs, that can be used to help make design decisions at the initial concept stage up to and. The aim is to compete in sae india baja competition. The concept of inboard braking stiffness holds true in. The course is intended for both oem and supplier engineers working in applications, materials, product design, development, testing. Academic update virginia tech uses finite element models to predict suspension. Susprog3d supports 30 suspensions systems including double aarm steering link.
The front pushrod design went smoothly thanks to the mitchell software. Simplified vertical, roll, cornering, traction and braking loads are applied to the suspension system and the response of the system to each is recorded. What is best software for designing suspension systems. The university of akron 2015 sae zips baja offroad racing team 2015 suspension system design ryan w. Upper lateral link, lower parallel links, twin trailing link rear a variation of the reversed lower aarm style. Suspension design tips 14 minimize unsprung weight. The paper will also focus on the use of tire data in determining suspension parameters and the design of the double wishbone suspension. I took on this design project completely independently and did a groundup design for the vehicle. The suspension on a vehicle serves multiple purposes. Utilizing an inboard design also reduces the complexity of the components in the wheel area, which can provide for better compromises for suspension characteristics. Suspension geometry part 1 camber, toe, caster, kpi. Susprog3d suspension by design is the premier 3 dimension road and race car suspension design, setup, modification and analysis software with support.
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