PITCHING ANGLE CALCULATING DEVICE

PROBLEM TO BE SOLVED: To set the correct car height reference value using a simple method and calculate accurate pitching angle. SOLUTION: Setting is made for the car height reference value hf0 in a specified position Pf on the front part of a vehicle when it is in the reference attitude and the car height reference value hr0 in another specified position Pr on the rear part of the vehicle, and a pitching angle calculating device calculates the pitching angle of a vehicle on the basis of the difference between these reference values and the car height sensing value hf in the position Pf when the vehicle is running and the car height sensing value hr in the position Pr, wherein the arrangement includes car height sensing means 1 and 2 to sense the car height values hff and hfr in the positions Pf and Pr when the vehicle is in the specified condition and reference value calculating means 33 and 36 to correct the sensed values of car height hff and hfr using the car height correction value αf in the preset position Pf and the car height correction value αr in the position Pr and calculate the car height reference values hf0 and hr0 when the vehicle is in the reference attitude. Thereby a correct car height reference value for calculating the pitching angle can be set by a simple method even if the vehicle does not take the reference attitude, and it is possible to calculate accurate pitching angle when the vehicle is running.