JPS62152806U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the basic structure of the shock absorber control device of this invention, FIG. 2 is a perspective view showing the overall arrangement of an embodiment of this invention, and FIG. 3 is a block diagram showing the structure of the above embodiment. FIG. 4 is a longitudinal sectional view showing an example of a variable damping force shock absorber, and FIG. 5 is a block diagram showing an example of a vehicle height sensor.
FIG. 6 is a flowchart showing the flag control processing procedure executed in the microcomputer;
FIG. 7 is a flowchart showing the processing procedure for damping force control of the variable damping force shock absorber on the front wheel side.
FIG. 8 is a flowchart showing the processing procedure for damping force control of the variable damping force shock absorber on the rear wheel side.
FIG. 9 is a time chart showing a specific example of the operation of this invention. 1a to 1d...Wheels, 2...Vehicle body, 3a to 3d
...Variable damping force shock absorber, 4...Controller, 5...Brake switch, 6...Throttle opening sensor, 7a to 7d...Vehicle height sensor,
9...Piston rod, 12...Tube, 13
... Piston, 21 ... Bypass path, 23 ... Plunger, 24 ... Return spring, 25 ...
...Solenoid, 27a-27d...Drive circuit, 2
9...Detection coil, 30...LC oscillation circuit, 31
... F/V conversion circuit, 33 ... microcomputer, 37 ... interface circuit, 38 ... arithmetic processing means, 39 ... storage device, A ... piston upper chamber, B ... piston lower chamber.

Claims (1)

[Scope of utility model registration request] front wheel side and rear wheel variable damping force shock absorbers capable of switching the damping force into at least two stages, soft side and hard side; sudden braking state detection means for detecting that the vehicle is in a sudden braking state; sudden acceleration/deceleration state detection means for detecting an acceleration/deceleration state; transient vertical vibration state detection means for detecting a state in which the vehicle body is temporarily vibrating up and down; and a sprung mass on the rear wheel side. rear wheel side relative displacement detection means for detecting relative displacement with respect to the unsprung mass; when the sudden braking state detection means detects that the vehicle is in a sudden braking state, and the sudden acceleration/deceleration state detection means detects that the vehicle is suddenly in a sudden braking state; front wheel side switching means for switching the damping force of the front wheel side variable damping force shock absorber to a hard side in at least one of the cases where an acceleration/deceleration state is detected; In at least one of the cases where it is detected that the vehicle is in a braking state or when the sudden acceleration/deceleration state detection means detects that the vehicle is in a sudden acceleration/deceleration state, and the transient vertical vibration state detection means When it is detected that the vehicle body is transiently vibrating vertically, the relative displacement between the sprung mass and the unsprung mass of the rear wheel side detected by the rear wheel side relative displacement detection means is detected. When the vehicle is moving toward the neutral position, the deceleration force of the rear wheel variable damping force shock absorber is switched to the hard side, and the rear wheel side sprung mass and spring mass detected by the rear wheel side displacement detection means are A shock absorber control device comprising rear wheel side switching means for switching the damping force of the rear wheel variable damping force shock absorber to a soft side when the relative displacement with respect to the rear wheel side is moving away from a neutral position.