发明授权
- 专利标题： Rear wheel turning system for four-wheel steered vehicle
- 专利标题（中）： 四轮转向车后轮转向系统
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申请号： US661198申请日： 1991-02-27
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公开(公告)号： US5227974A公开(公告)日： 1993-07-13
- 发明人: Atsuo Tomoda , Shin Takehara , Ryuya Akita
- 申请人： Atsuo Tomoda , Shin Takehara , Ryuya Akita
- 申请人地址： JPX Hiroshima
- 专利权人： Mazda Motor Corporation
- 当前专利权人： Mazda Motor Corporation
- 当前专利权人地址： JPX Hiroshima
- 优先权： JPX2-48650 19900228
- 主分类号： B62D6/00
- IPC分类号： B62D6/00 ; B62D5/04 ; B62D7/14 ; B62D7/15 ; B62D101/00 ; B62D111/00 ; B62D113/00 ; B62D137/00
摘要：
A rear wheel turning system for a four-wheel steered vehicle includes a rear wheel turning mechanism for turning the rear wheels of the vehicle, a front wheel turning angle sensor which detects a turning angle of front wheels .theta..sub.F, a vehicle speed sensor which detects a vehicle speed V, a yaw rate detector which detects a yaw rate .PSI. of the vehicle, a yaw acceleration detector which detects a yaw acceleration .PSI. of the vehicle, and a control unit which causes the rear wheel turning mechanism to turn the rear wheels by a target rear wheel turning angle TG.theta..sub.R which is defined by formulaTG.theta..sub.R =-K.sub.1 .theta..sub.F +K.sub.2 .multidot.V.multidot..PSI.+K.sub.3 .multidot.V.multidot..PSI.wherein K.sub.1, K.sub.2 and K.sub.3 respectively represent positive coefficients. The coefficient K.sub.3 is increased with increase in the vehicle speed V over a predetermined range of vehicle speed where the coefficient K.sub.2 is constant.
公开/授权文献
- US5862327A Activity based long-lived transaction system 公开/授权日：1999-01-19
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