JPH01175405U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a basic conceptual diagram of the present invention, Figs. 2 to 8 are diagrams showing the first embodiment of the variable damping force hydraulic shock absorber according to the invention, and Fig. 2 shows the overall structure of the shock absorber. 3 is a cross-sectional diagram of the main parts thereof, and FIG. 4 is a diagram of the overall configuration of the system.
Figure 5 is a partial circuit diagram, Figure 6 is a flowchart showing the main program of variable damping force control, Figure 7 is a flowchart showing a subprogram of variable damping force control, and Figure 8 is its operation. 9 to 12 are diagrams showing a second embodiment of the variable damping force type hydraulic shock absorber according to the present invention, and FIG. 9 is an overall configuration diagram of the system, and FIG. 10 is a diagram for explaining the system. 11 is a flowchart showing the main program of the damping force variable control, and FIG. 12 is a flowchart showing the subprogram of the damping force variable control. 1...Shock absorber, 3...Cylinder,
4... Piston, 60... First piezoelectric element (first
detection means, second operating means), 70... damping means (first damping means, second damping means), 90...
... Second piezoelectric element (second detection means, first operation means), 100 ... Control unit (control means, tilt state determination means), 101 ... I/O port, 110 ... Input circuit, 120 ... Arithmetic circuit, 130 ... Drive circuit, 140 ... Drive power supply circuit, {150 ... Brake SW, 152 ... Throttle sensor} (driving state detection means), 180 ...
...G sensor (running state detection means).

Claims (1)

[Claims for Utility Model Registration] (a) A first detection means for detecting hydraulic pressure on the pressure side of a variable damping force type shock absorber; (b) For detecting hydraulic pressure on the rebound side of a variable damping force type shock absorber. (c) a running state detecting means for detecting an acceleration state and a deceleration state among the running states of the vehicle; (d) an output of the running state detecting means and an output of the first detecting means and the second detecting means; (e) a tilt state determining means for determining the tilt state of the vehicle body in the longitudinal direction based on the output of the detection means; and (e) one of the four shock absorbers that is compressed when the vehicle reaches a predetermined tilt state. The above compression side damping force and one or more rebound side damping forces on the extended side are set to a predetermined high damping force, and when the predetermined tilting state ends, the four shock absorbers are sequentially detection means and a second
The rate of change in hydraulic pressure is determined from the output of the detection means, and when the rate of change exceeds a predetermined dead band and reaches an extreme value, the shock absorber is set to a predetermined high damping force, and the value of the high damping force is set to the extreme value. (f) control means for calculating a control value that is determined according to the damping force and that reduces the damping force to a predetermined low value when the rate of change decreases to a predetermined value; (g) a second operating means for changing the damping force on the rebound side of the variable damping force type shock absorber based on the output of the control means; Variable damping force hydraulic shock absorber.