Vibration control apparatus for automotive vehicle
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B60K-028/16
G06F-019/00
출원번호
US-0703596
(2003-11-10)
등록번호
US-8489300
(2013-07-16)
우선권정보
JP-2002-335230 (2002-11-19)
발명자
/ 주소
Kataoka, Motoaki
Matsumoto, Toshiki
Tashiro, Tsutomu
Mabuchi, Mamoru
Sawada, Mamoru
출원인 / 주소
DENSO CORPORATION
대리인 / 주소
Posz Law Group, PLC
인용정보
피인용 횟수 :
1인용 특허 :
12
초록▼
An object of the present invention is to execute an optimum control of vibrations due to a driver's operation of an accelerator pedal, steering wheel and brake pedal. The operation instructions are inputted into a vibration calculating means (kinetic model) comprising a vehicle body model, suspensio
An object of the present invention is to execute an optimum control of vibrations due to a driver's operation of an accelerator pedal, steering wheel and brake pedal. The operation instructions are inputted into a vibration calculating means (kinetic model) comprising a vehicle body model, suspension model and tire model. Conventional kinetic model controlled the suspension in order to suppress the vehicle body vibration. However, in the kinetic model of the present invention, the tire vibration due to a change in the engine output is first absorbed by the suspension, whereby a residual vibration which was not be absorbed yet by the suspension is transferred to the vehicle body. The operation inputs are compensated by the three feed-back loops between the outputs of the above-mentioned three portions and input of the tire portion, giving the highest priority on the vehicle body model.
대표청구항▼
1. A vehicle vibration control apparatus, comprising: a driver's operation detecting unit configured to detect operation quantities of an accelerator, a steering wheel and a brake of a vehicle inputted by a driver as a driver's input indicating the operation quantities;a force calculator which calcu
1. A vehicle vibration control apparatus, comprising: a driver's operation detecting unit configured to detect operation quantities of an accelerator, a steering wheel and a brake of a vehicle inputted by a driver as a driver's input indicating the operation quantities;a force calculator which calculates a driver-requested driving force and a driver-requested braking force of a vehicle in accordance with the driver's input;a vibration calculator which calculates, from the driver-requested driving force and the driver-requested braking force calculated in the force calculator, an on-spring vibration denoting vibrations of a body of the vehicle caused by the driver's input; anda compensator configured to compensate the driver-requested driving force according to the on-spring vibration calculated by the vibration calculator to produce a compensated driving force such that the on-spring vibration denoting vibration of the body of the vehicle is reduced or suppressed to a compensated on-spring vibration. 2. The vehicle vibration control apparatus according to claim 1, wherein: said vibration calculator comprises: a tire model for calculating a tire vibration caused by a road surface reaction force,a suspension model for calculating an under-spring vibration of a suspension of the vehicle, anda vehicle model which performs the calculation in said vibration calculator of said on-spring vibration denoting vibrations of said body of said vehicle caused by the driver's input; andsaid compensator compensates the driver-requested driving force in order to reduce the vibrations, giving priority to said vehicle model to give a top priority to the reduction of the on-spring vibration. 3. The vehicle vibration control apparatus according to claim 1, wherein: said compensator compensates the driver-requested driving force in order to reduce a vibration caused by a torque or reaction force due to an external factor outside said vehicle. 4. The vehicle vibration control apparatus according to claim 2, wherein the driver-requested driving force and the driver-requested braking force are inputted into said tire model which is connected with an input of said suspension model which is connected with said vehicle model, and the tire vibration in said tire model, the under-spring vibration in said suspension model and the on-spring vibration in said vehicle model are calculated in that order. 5. The vehicle vibration control apparatus according to claim 1, wherein: said compensator compensates the driver-requested driving force in order to reduce vibrations caused by a torque or reaction force due to an external factor outside said vehicle and the driver's input. 6. The vehicle vibration control apparatus according to claim 1, wherein said compensator compensates the driver-requested driving force in order to reduce a displacement of the center of gravity of said vehicle body. 7. The vehicle vibration control apparatus according to claim 1, wherein said compensator compensates the driver-requested driving force in order to reduce a displacement of a head position of a passenger. 8. The vehicle vibration control apparatus according to claim 1, wherein said vibration calculator calculates a tire vibration caused by the driver-requested driving force and the driver-requested braking force, an under-spring vibration caused by the tire vibration and the on-spring vibration caused by the under-spring vibration in that order, said compensator compensates the driver-requested driving force in order to reduce the on-spring vibration at a top priority, the under-spring vibration at a second priority, and the tire vibration at a lowest priority. 9. The vehicle vibration control apparatus according to claim 1, wherein the driver's operation detecting unit is configured to detect, as the driver's input, at least one of a set down stroke of an accelerator pedal, a set down stroke of a brake pedal, a turning angle of a steering wheel, a throttle state, and a brake master cylinder pressure. 10. The vehicle vibration control apparatus according to claim 1, wherein the on-spring vibration of the body of the vehicle has a frequency ranging from 1 Hertz to 2 Hertz. 11. The vehicle vibration control apparatus according to claim 1, the on-spring vibration of the body of the vehicle being caused due to a pitching motion of the body of the vehicle denoting rotation of the vehicle body around a pitch axis. 12. The vehicle vibration control apparatus according to claim 1, the on-spring vibration of the body of the vehicle being caused due to a transverse motion of the vehicle body. 13. The vehicle vibration control apparatus according to claim 1, the on-spring vibration of the body of the vehicle being caused due to a drag which is an action force generated by a tire of the vehicle during a steering operation and acted along a direction reverse to a moving direction of the vehicle. 14. The vehicle vibration control apparatus according to claim 1, the on-spring vibration of the body of the vehicle being caused due to a rolling motion of the vehicle body. 15. The vehicle vibration control apparatus according to claim 1, the vibration calculator performing said calculation of the on-spring vibration according to a vehicle model for modeling the on-spring vibration, and the vehicle model further calculating a direction of motion of a center of gravity of the body of the vehicle. 16. The vehicle vibration control apparatus according to claim 1, the on-spring vibration of the body of the vehicle being caused due to a transverse motion of the vehicle body,the on-spring vibration of the body of the vehicle being caused due to a drag which is an action force generated by a tire of the vehicle during a steering operation and acted along a direction reverse to a moving direction of the vehicle, andwherein the on-spring vibration of the body of the vehicle being caused due to a rolling motion of the vehicle body. 17. The vehicle vibration control apparatus according to claim 1, the driver-requested driving force being inputted by the driver by operating the accelerator of the vehicle. 18. The vehicle vibration control apparatus according to claim 1, wherein the vehicle has a plurality of wheels, and the vibration calculator calculates a tire vibration caused by a road surface reaction force, transferred from a road surface through a plurality of tires of the wheels of the vehicle, from the driver-requested driving force and the driver-requested braking force calculated in the force calculator, calculates an under-spring vibration of a suspension of the vehicle caused by the tire vibration, and calculates the on-spring vibration caused by the under-spring vibration. 19. The vehicle vibration control apparatus according to claim 1, wherein the vibration calculator has a vibration estimating unit that estimates the on-spring vibration. 20. The vehicle vibration control apparatus according to claim 1, wherein the vehicle has a plurality of wheels, the vibration calculator has a vibration estimating unit that estimates a tire vibration caused by a road surface reaction force, transferred from a road surface through a plurality of tires of the wheels of the vehicle, from the driver-requested driving force and the driver-requested braking force, estimates an under-spring vibration of a suspension of the vehicle caused by the tire vibration, and estimates the on-spring vibration caused by the under-spring vibration.
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