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Zhong Zhi-hua - One of the best experts on this subject based on the ideXlab platform.

  • Analysis of Braking Stability of Rhombic New Concept Car
    Journal of Hunan University, 2010
    Co-Authors: Zhong Zhi-hua
    Abstract:

    The dynamics model of rhombic new Concept Car in the brake process was established.The slid-displacement of the center of mass and course angle were obtained when the disturb force and disturb torsion acted on the center of the mass through matlab/simulink.Simulation results have indicated that the rhombic new Concept Car will be unstable if the rear wheel is locked before the front wheel when the middle wheel is locked,and the condition will be more acute when the rear wheel is locked first and alone.At last,ways to avoid unstable condition were given.Theoretical support for the design of the rhombic new Concept Car was proposed.

  • Design and Analysis of the Steering Transmission Mechanism for Rhombus Concept Car
    Communications Standardization, 2008
    Co-Authors: Zhong Zhi-hua
    Abstract:

    According to the special structure layout of the rhombus Concept Car,a steering transmission mechanism whose front and rear wheels are linked together is proposed. And the correlation of the steering transmission mechanism is deduced based on the analytical method,and the dimension and the key points position of the rods can be decided by the structure layout of the vehicle. This theory,which is validated by ADAMS simulation,provides a theoretical base for further research of the rhombus Concept Car.

  • Analysis of Steering Dynamics of Rhombic New Concept Car
    Journal of Hunan University, 2006
    Co-Authors: Zhong Zhi-hua
    Abstract:

    A rhombic new Concept Car is characterized with a rhombic configuration of 4 wheels,which has the advantage of avoiding forward collision,excellent mobility,and low wind resistive factor over traditional Cars.A linear 2 DOF vehicle model with three wheels was firstly used to analyze the steering dynamics of the rhombic new Concept Car,and the steering stability factor and yaw rate gain transform function were deduced.Furthermore,for more accurate simulation,a nonlinear 8 DOF vehicle model was used to analyze the step steering response of the rhombic Car.Simulation results prove the feasibility of rhombic configuration of wheels because its steering dynamics is comparable to that of vehicles with traditional configuration of wheels.

T Schweers - One of the best experts on this subject based on the ideXlab platform.

  • smart hyper - ein Hybridkonzept mit hohem Innovationspotential / smart hyper - a hybrid Concept-Car with high innovative potential
    2001
    Co-Authors: T Schweers
    Abstract:

    Der smart hyper repraesentiert ein Hybridkonzept, das neben einer spuerbaren Verminderung von Kraftstoffverbrauch und Emissionen auch eine signifikante Verbesserung von Komfort und Fahrleistungen zum Ziel hat. Es basiert auf dem bereits im Markt befindlichen Drei-Liter-Fahrzeug smart cdi. Die Integration des elektrischen Antriebssystems in das Fahrzeug erfordert keine gravierenden Modifikationen und erhoeht sein Gewicht um nur 85 Kilogramm. Das parallele Betriebskonzept erlaubt es, beide Antriebsaggregate in ihren optimalen Betriebspunkten und gemaess ihrer komplementaeren Drehmomentverlaeufe zu betreiben. Je nach gewuenschtem Antriebsmoment aktiviert das Regelsystem Elektro- oder Verbrennungsmotor oder beide in Kombination. Damit koennen konventionelle Nachteile der Start/Stopp-Automatik ebenso kompensiert werden wie Zugkraftunterbrechungen beim Schalten. (A) ABSTRACT IN ENGLISH: The smart hyper Concept Car represents a hybrid-system, which aims at a considerable reduction in terms of fuel consumption and emissions as well as at a significant improvement of comfort and performance. The smart cdi provides the basis of this project, which is already sold as an approved three litre consuming vehicle. The integration of the electric drive train requires only minor modifications and increases the vehicle weight by no more than 85 kilograms. The parallel hybrid Concept allows to run both engines at their most efficient rev / load range and according to their complementary torque curves. The motor management system activates either the electric or the combustion engine or both of them, according to the requested driving torque. Thus the conventional disadvantages of the automatic start-stop system can be compensated as well as the loss of traction during gear shift. (A)

  • smart hyper - ein Hybridkonzept mit hohem Innovationspotential / smart hyper - a hybrid Concept-Car with high innovative potential
    2001
    Co-Authors: T Schweers
    Abstract:

    Der smart hyper repraesentiert ein Hybridkonzept, das neben einer spuerbaren Verminderung von Kraftstoffverbrauch und Emissionen auch eine signifikante Verbesserung von Komfort und Fahrleistungen zum Ziel hat. Es basiert auf dem bereits im Markt befindlichen Drei-Liter-Fahrzeug smart cdi. Die Integration des elektrischen Antriebssystems in das Fahrzeug erfordert keine gravierenden Modifikationen und erhoeht sein Gewicht um nur 85 Kilogramm. Das parallele Betriebskonzept erlaubt es, beide Antriebsaggregate in ihren optimalen Betriebspunkten und gemaess ihrer komplementaeren Drehmomentverlaeufe zu betreiben. Je nach gewuenschtem Antriebsmoment aktiviert das Regelsystem Elektro- oder Verbrennungsmotor oder beide in Kombination. Damit koennen konventionelle Nachteile der Start/Stopp-Automatik ebenso kompensiert werden wie Zugkraftunterbrechungen beim Schalten. (A) ABSTRACT IN ENGLISH: The smart hyper Concept Car represents a hybrid-system, which aims at a considerable reduction in terms of fuel consumption and emissions as well as at a significant improvement of comfort and performance. The smart cdi provides the basis of this project, which is already sold as an approved three litre consuming vehicle. The integration of the electric drive train requires only minor modifications and increases the vehicle weight by no more than 85 kilograms. The parallel hybrid Concept allows to run both engines at their most efficient rev / load range and according to their complementary torque curves. The motor management system activates either the electric or the combustion engine or both of them, according to the requested driving torque. Thus the conventional disadvantages of the automatic start-stop system can be compensated as well as the loss of traction during gear shift. (A)

Zhihua Zhong - One of the best experts on this subject based on the ideXlab platform.

  • A Study on Crashworthiness of Rhombus Concept Car
    2012 Third International Conference on Digital Manufacturing & Automation, 2012
    Co-Authors: Sen Xiao, Jikuang Yang, Zhihua Zhong
    Abstract:

    This study aims at evaluation of crashworthiness of rhombus Concept Car by comparing the response of related parameters in different collision conditions. For this objective the numerical method was used to simulate the dynamic responses of the rhombus Concept Car in frontal and small overlap collisions. The dynamic response parameters was analyzed and discussed in terms of the invasion quantity of rhombus Car, accelerations, and impact force-displacement curves from both front impact and small overlap impact. The results from simulations of rhombus Car impacts were compared with the results from simulations of ordinary passenger Car. The results of the study demonstrate that: in the case of front impact and small overlap impact, rhombus Car has good crashworthiness, which indicated also a good performance in protecting the integrity of its own body structure.

  • ICDMA - A Study on Crashworthiness of Rhombus Concept Car
    2012 Third International Conference on Digital Manufacturing & Automation, 2012
    Co-Authors: Sen Xiao, Jikuang Yang, Zhihua Zhong
    Abstract:

    This study aims at evaluation of crashworthiness of rhombus Concept Car by comparing the response of related parameters in different collision conditions. For this objective the numerical method was used to simulate the dynamic responses of the rhombus Concept Car in frontal and small overlap collisions. The dynamic response parameters was analyzed and discussed in terms of the invasion quantity of rhombus Car, accelerations, and impact force-displacement curves from both front impact and small overlap impact. The results from simulations of rhombus Car impacts were compared with the results from simulations of ordinary passenger Car. The results of the study demonstrate that: in the case of front impact and small overlap impact, rhombus Car has good crashworthiness, which indicated also a good performance in protecting the integrity of its own body structure.

David Greve - One of the best experts on this subject based on the ideXlab platform.

  • Transforming the theorem prover into a digital design tool : From Concept Car to off-road vehicle
    Lecture Notes in Computer Science, 1998
    Co-Authors: David S. Hardin, Matthew Wilding, David Greve
    Abstract:

    As digital designs grow evermore complex and design cycles become ever shorter, traditional informal methods of design verification are proving inadequate. Design teams are increasingly turning to formal techniques to address this verification crunch. The theorem prover, with its emphasis on establishing correctness, is arguably the dream design verification tool; however, theorem provers are rarely used in digital design. Much like automotive industry Concept Cars, theorem provers provide a compelling vision of the future, but in the real world of industrial design they have proven to be difficult to drive and expensive to maintain. We suggest ways that the theorem prover Concept Cars of today can be adapted to become the off-road vehicles necessary to negotiate the rough-and-tumble terrain of digital design in the 21st century.

  • CAV - Transforming the Theorem Prover into a Digital Design Tool: From Concept Car to Off-Road Vehicle
    Computer Aided Verification, 1998
    Co-Authors: David S. Hardin, Matthew Wilding, David Greve
    Abstract:

    As digital designs grow evermore complex and design cycles become ever shorter, traditional informal methods of design verification are proving inadequate. Design teams are increasingly turning to formal techniques to address this “verification crunch”. The theorem prover, with its emphasis on establishing correctness, is arguably the dream design verification tool; however, theorem provers are rarely used in digital design. Much like automotive industry “Concept Cars”, theorem provers provide a compelling vision of the future, but in the real world of industrial design they have proven to be difficult to drive and expensive to maintain. We suggest ways that the theorem prover “Concept Cars” of today can be adapted to become the “off-road vehicles” necessary to negotiate the rough-and-tumble terrain of digital design in the 21st century.

Prabhu Kandachar - One of the best experts on this subject based on the ideXlab platform.

  • materials selection for an automotive structure by integrating structural optimization with environmental impact assessment
    Materials & Design, 2004
    Co-Authors: Natalia S Ermolaeva, Maria B G Castro, Prabhu Kandachar
    Abstract:

    Sustainable product development of an automotive structure requires a balanced approach towards technological, economical and ecological aspects. Current paper shows the application of a structural optimization system to the optimal choice of foams as a core material for sandwiches with aluminum alloy faces, for the use as floor panels in the bottom structure of a Concept Car. The minimization problem for the weight of the entire bottom structure under static load conditions, including stiffness, strength and buckling constraints, is formulated and solved for each material application. In addition to optimal (minimized) mass and materials' price used for selection of foams, the assessment of an environmental impact of materials-candidates during the entire life cycle of the structure is considered.