摘要:
An automotive suspension system includes means for monitoring bounding and rebounding strokes for producing a stroke indicative signal, and means for detecting frequency of bounding and rebounding strokes based on the stroke indicative signal. The suspension characteristics are hardened when the detected frequency is lower than a predetermined stroke frequency threshold for providing higher driving stability. On the other hand, when the detected stroke frequency is higher than or equal to the stroke frequency threshold, the suspension characteristics are switched between harder suspension characteristics and softer suspension characteristics depending upon stroke position for absorbing vibration energy and assuring riding comfort.
摘要:
A variable damping characteristics shock absorber includes a piezoelectric transducer which is responsive to piston stroke for producing a piston stroke indicative signal. The piston stroke indicative signal includes component indicative of piston strike direction so as to enable control of the damping characteristics depending upon the piston stroke direction.
摘要:
An automotive suspension system employs a pressure sensor means designed for monitoring fluid pressure in a fluid chamber of shock absorber to be compressed during piston bounding stroke. Variable suspension characteristics to vary suspension mode between HARD mode and SOFT mode so that suspension mode is normally set in SOFT mode and switched into HARD mode when the peak value of variation rate of the output of the sensor means is detected. The suspension system is provided a deadband for maintaining the suspension mode unchanged even when the peak of variation rate is detected.
摘要:
An automotive suspension system employs a pressure sensor means designed for monitoring fluid pressure in a fluid chamber of shock absorber to be compressed during piston bounding stroke. Variable suspension characteristics to vary suspension mode between HARD mode and SOFT mode so that suspension mode is normally set in SOFT mode and switched into HARD mode when variation rate of the output of the sensor means becomes greater than a predetermined rate and when the output of the sensor means represents a pressure higher than a predetermined level in the piston bounding stroke.
摘要:
A worm wheel is mounted to a steered shaft to rotate therewith. A brushless electric motor has an output shaft and is able to generate a power for assisting turning of the steered shaft when energized. A worm gear is coaxially connected to the output shaft of the motor to constitute a combined shaft structure. The worm gear is meshed with the worm wheel. Two bearings bear axially opposite end portions of the combined shaft structure respectively.
摘要:
An elastically deflectable sensor body has an inner peripheral portion engaging with a first portion of a radially extending wall of a lid closing one end of a cylinder of a shock absorber for movement therewith and an outer peripheral portion engaging with a second portion of the radially extending wall. A first pair of diametrically opposed strain gages and a second pair of diametrically opposed strain gages are placed on the sensor body. A first Wheatstone bridge circuit has the two diametrically opposed strain gages of the first pair in series. A second Wheatstone bridge circuit has the two diametrically opposed strain gages of the second pair in parallel.
摘要:
A hydraulic shock absorber is provided a capability of quick response in such an extent that harder damping characteristics is provided during bounding stroke in each vibration cycle and softer damping characteristics is provided during rebounding stoke in each vibration cycle. The hydraulic shock absorber is controlled the damping characteristics for damping road shock by switching damping characteristics between harder damping characteristics and softer damping characteristics during normal mode operation. On the other hand, in attitude change suppression mode, suspension characteristics for suppressing vehicular body attitude change irrespective of the vibration mode.
摘要:
According to the present invention, a sensor arrangement of a vibration isolation apparatus has a generally annular sensor plate with a plurality of strain sensing elements mounted on a radially extending portion which is elastically deformable upon application of input load. The sensor plate is elastically deformed upon elastic deformation of the radially extending portion.
摘要:
A variable damping characteristics shock absorber includes a piezoelectric unit which serves as a sensor for detecting piston stroke and an actuator for adjusting stiffness of a flow restriction valve and thus for adjusting the damping characteristics of the shock absorber. The shock absorber includes a pair of flow restriction valves, in which one of valve is active in response to a piston bounding stroke for generating damping force by restricting the fluid flow and the other is active in response to a piston rebounding stroke for generating a damping force by restricting fluid flow. The piezoelectric unit is disposed between two valves in such a manner that it may monitor piston strokes both in the bounding and rebounding stroke directions and adjust stiffness of both of the flow restriction valves.
摘要:
In an apparatus for controlling a variable damping coefficient for at least one vehicular shock absorber, the shock absorber being interposed between a vehicle body and a tire wheel, an adjuster of the shock absorber which is so constructed as to change its position so as to provide an optimum damping coefficient for the shock absorber in response to a drive by means of an actuator (pulse motor), vehicle behavior detector which is so constructed as to detect a vehicle behavior, a damping coefficient control portion to derive an optimum damping coefficient according to the vehicular behavior, and a drive/control portion to form a drive/control signal to actuate the actuator, the drive/control portion is separated from the damping coefficient control portion and is integrally incorporated into the actuator. Furthermore, a fail safe circuit is integrally incorporated into the actuator, which is so constructed as to provide a predetermined fail safe drive for the actuator upon receipt of a signal indicating an occurrence of abnormality in either the damping coefficient control portion or drive/control portion from the damping coefficient control side.