Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
CALCULATING DEVICE OF ROAD SURFACE FRICTION COEFFICIENT
Document Type and Number:
Japanese Patent JP3798668
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To improve accuracy in determining a road surface friction coefficient.
SOLUTION: This calculating device comprises a steering angle sensor 1, wheel speed sensors 5a, 5b, 5c, and 5d, a longitudinal acceleration sensor 4, a lateral acceleration sensor 3, a tire model setting part TM, a tire slip ratio calculating part SLPmn, a calculating part FGE of an estimated car body longitudinal acceleration, a tire slip angle calculating part αmn, a wheel load calculating part FZmn, a tire lateral force calculating part CFmn, an LGE, and a calculating part μ of a road surface friction coefficient. The calculating part μ of the road surface friction coefficient determines the road surface friction coefficient based on a deviation between a car body longitudinal acceleration and the estimated car body longitudinal acceleration and a deviation between a car body lateral acceleration and an estimated car body lateral acceleration. The road surface friction coefficient is not determined from the tire slip ratio, but sensor detecting values are compared with estimated values with respect to the car body longitudinal direction and the car body lateral direction, and the road surface friction coefficient can be accurately determined in respect to the deviation.


Inventors:
Kei Kei
Osamu Yano
Hiroyuki Urabe
Application Number:
JP2001314521A
Publication Date:
July 19, 2006
Filing Date:
October 11, 2001
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
Honda motor industry stock company
International Classes:
G01N19/02; B60R16/02; B60T8/172; B60T8/1763; B60W40/068; B60W40/10; B60W40/101; B60W40/103; (IPC1-7): B60T8/58; G01N19/02
Domestic Patent References:
JP2000025599A
JP9020222A
JP2000190835A
JP3269240A
JP11034840A
JP5105066A
JP4257758A
Attorney, Agent or Firm:
Yoichi Oshima