《国外公司轮胎设计》PPT课件.ppt

New Concept High Aspect Low Profile (HALP) Tyre/Rim System - Background Concept Description Applications Current Status Forward Action,Presentation Title and Agenda,The trend towards low profile tyres and large diameter rims continues The trend is driven by two major reasons: 1. Performance Better Handling and Stability As seen on high performance cars 2. Appearance Appealing to the consumer as a custom upgrade As seen on luxury vehicles and SUVs However, there is a performance trade off,Background,For performance,For appearance,Presentation Title and Agenda,Using lower profile tyres has the following disadvantages: 1. Ride Comfort Harsher ride More road noise 2. Decreased Load Carrying Capacity 3. Road Hazard Durability More prone to impact damage (i.e. potholes) The HALP concept was invented for the SUV or luxury vehicle owner who wants a low profile appearance without the sacrifice in ride comfort.,Background,Low profile tyres have serious disadvanges for a vehicle like this Ford F150.,These disadvantages are acceptable for a high performance vehicle. However, they are less acceptable for SUV and luxury vehicle owners.,Presentation Title and Agenda,Concept Description,Ride comfort of a high aspect ratio tyre,Load capacity of a high aspect ratio tyre,Handling of a low profile tyre,Appearance of a low profile tyre,HALP =,Presentation Title and Agenda,Concept Description,HALP Concept,Conventional Rim and Tyre,Presentation Title and Agenda,Concept Description,Gap between tyre and flange extension permits vertical tyre deflection (for ride comfort).,The flange extension increases the perceived diameter of the rim for a low profile appearance. It also restricts lateral displacement of the tyre (for improved limit handling).,The tyre is mostly conventional but has a raised rim protector and increased area of flange rubber.,Tyre volume is maintained for improved load capacity over a low profile tyre.,Presentation Title and Agenda,Concept Appearance,Conventional 20” Rim,HALP with 22” appearance,Presentation Title and Agenda,Rim Configurations,HALP Concept,KETC will work a rim manufacturer to develop the best HALP rim design.,Potential rim designs,Presentation Title and Agenda,Rim Configurations,Rim functionality: The rim (1) must permit easy mounting of the tyre. The removable flange extension (2) is bolted on to the rim after tyre mounting. The dimension of the gap between tyre and flange extension will be tuned based on performance testing.,Presentation Title and Agenda,Applications,Aftermarket: For the discerning customer wants improved ride comfort for their luxury vehicle or SUV, or needs more load capacity, such as for towing.,OE Specification: HALP may be very attractive to OE customers. It will relieve pressure on the suspension designers who seek to achieve the best balance of ride and handling.,The Infiniti FX45 set an industry precedent by having optional 20” rims, however it was criticized for its harsh ride. HALP would fix this problem.,The owner of this GMC Denali has equipped it with 22” aftermarket rims. The maximum gross weight of this vehicle is 3256 kg. The tyre load limit is 3300 kg if equipped with 285/