Abstract

Traffic congestion and lack of parking spaces in urban areas etc. may lessen the original benefits of cars, and now new ultra-small mobility concepts called personal mobility vehicles (PMVs) are receiving attention. Among them, PMVs with an inward tilting mechanism in order to avoid overturning on turning, as in motorcycles, look realistic in new, innovative traffic systems. In this study, PMVs with an active inward tilting mechanism with three wheels, double front wheels and single rear wheel, were studied regarding front inner wheel lifting phenomena, capability of obstacle avoidance and energy balance of active tilting mechanism. Based on a comprehensive study of inner wheel lifting and obstacle avoidance, PMVs with a front wheel steering system as the most realistic specification were compared on capability of obstacle avoidance with passenger cars and motorcycles with those that have current market experience, and showed better capability. Although the energy consumption of an active inward tilting mechanism might be in conflict with the energy efficiency of small PMV concepts, the energy needed to tilt PMVs was very little compared with the general energy consumption of driving. It was clarified that the new PMV concepts with inward tilting mechanism have sufficient social acceptability from both mandatory points of safety and efficiency.

Highlights

  • Automobiles have improved the quality of life of human beings, too big an increase in the number of vehicles in use has the potential to spoil the original benefits of automobiles, due to problems such as traffic congestion and lack of parking space in urban areas

  • In this report, using the multibody dynamics models described in the chapter, we study three

  • In this report, using the multibody dynamics models described in the chapter, we study concerns regarding personal mobility vehicles (PMVs) with active tilting mechanisms and discuss the social acceptability of inward three concerns regarding PMVs with active tilting mechanisms and discuss the social acceptability of tilting type PMVs

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Summary

Introduction

Automobiles have improved the quality of life of human beings, too big an increase in the number of vehicles in use has the potential to spoil the original benefits of automobiles, due to problems such as traffic congestion and lack of parking space in urban areas. New ultra-small mobility concepts called personal mobility vehicles (PMVs) are attracting attention [1,2]. PMVs with narrow total width are likely to be of the inward tilting type, the same as motorcycles, in order to avoid overturning on turning. The following concerns should be clarified in order to implement new PMV concepts with inward tilting mechanisms in future mobility society. The following is the main concern regarding PMVs with a passive tilting mechanism:. The following are the main concerns regarding PMVs with an active tilting mechanism: Inner wheel lifting on sudden steering input

Self-Standing Ability from Stop to Very Low Speed
Study of PMVs with Active Tilting Mechanism
Vehicle Model
Suspension
Target
Driver Model
Inner Wheel Lifting Phenomena
Understanding Mechanism of Lifting Phenomena
Influence of PID Factors on Roll Angle Tracking Control
Steering Input Condition
Relation between Steering Angle and Input Frequency
Vehicle Speed
Influence
Roll Resonance Frequency fφ and Influence of Roll Dynamics
17. Vehicle
Closed Loop Simulation
Judgment of FWS and RWS on Implementation
Comparison with Passenger Cars and Motorcycles
Driving Course
Passing Speed Comparison and Understanding Social Acceptability
Mechanism of Superiority of PMV
26. Lateral
Summary of This Section
Energy Consumption on Active Tilting System
Energy Consumption in Active Tilting Mechanism
Energy Consumption by Cornering Drag in Case of No Tilting
Energy
Energy Consumption on Steady Circle
Energy Consumption in Slalom
Typical
Evaluation
36. Consumed and saved saved energy energy on on AMS
37. Energy
Social
Conclusions
Full Text
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