Vehicle having slip suppressing device and suspension control device

Claim 2

A vehicle which comprises: a power unit; at least a pair of driving wheels rotated by an output from said power unit; fluid pressure cylinders, inserted between a vehicle body and said driving wheels, for adjusting a vehicle height of said vehicle body at one end where said driving wheels are placed; a fluid pressure source for supplying a high-pressure working fluid to said fluid pressure cylinders; flow control means for controlling supply and discharge of the high-pressure working fluid to and from said fluid pressure source; slip detection means for detecting a driving force slip of said driving wheels; brake means for decreasing a rotating force of said driving wheels; slip suppressing mean for, when said slip detection means detects a slip of said driving wheels, operating said brake means to suppress the slip; and suspension control means for controlling said flow control means, said suspension control means starting to control said flow control means to supply the high-pressure working fluid to said fluid pressure cylinders in order to increase the height of the vehicle body at said one end where said driving wheels are placed, when said slip suppressing means starts to perform the braking operation as the slip suppressing operation.

Claim 3

The vehicle according to claim 1, wherein said driving wheels are rear wheels.

Claim 4

The vehicle according to claim 2, which further comprises vehicle height detection means for detecting a height of a rear portion of said vehicle body relative to said driving wheels, and wherein said suspension control means controls said flow control means to supply the high-pressure working fluid until said vehicle height detection means detects that the vehicle height of the rear portion of said vehicle body is increased to a predetermined level relative to said driving wheels.

Claim 5

The vehicle according to claim 3, wherein the high-pressure working fluid comprises high-pressure air.

Claim 6

The vehicle according to claim 2, which further comprises damper means which is inserted between said vehicle body and said driving wheels and whose damping forces are variable, and wherein said suspension control means functions to increase the damping forces of said damper means at the same time said slip suppressing control operation is initiated.

Claim 7

The vehicle according to claim 1, wherein said slip suppressing means comprises power unit control means for, when a slip is detected, decreasing an output from said power unit.

Claim 8

The vehicle according to claim 6, wherein a slip ratio detected by said slip detection means is small, said slip suppressing means causes said power unit control means to decrease the output of said power unit to suppress a slip, and when the slip ratio detected by said slip detection means is large, said slip suppressing means causes said power unit control means to decrease the output of said power unit and operates said brake means to suppress a slip.

Claim 9

The vehicle according to claim 7, wherein said power unit functions to control the open and closed state of a throttle valve of said power unit.

Claim 10

A vehicle which comprises: a vehicle body; a power unit mounted in said vehicle body; at least a pair of driving wheels rotated by an output from said power unit; suspension devices between said driving wheels and said vehicle body for adjusting the height of said vehicle body relative to said driving wheels; suspension control means for controlling a suspension state of said suspension devices; slip detection means for detecting a slip state of said driving wheels; and slip suppressing means for, when said slip detection means detects a slip of said driving wheels, decreasing a rotating force of said drive wheels to suppress a slip, and for outputting a control signal to said suspension control means to increase the height of said vehicle body relative to said driving wheels.

Claim 11

A vehicle which comprises: a vehicle body; a power unit mounted in said vehicle body; at least a pair of driving wheels rotated by an output from said power unit; suspension devices between said driving wheels and said vehicle body for adjusting the height of said vehicle body relative to said driving wheels; suspension control means for controlling a suspension state of said suspension devices; slip detection means for detecting a slip state of said driving wheels; and slip suppressing means for, when said slip detection means detects a slip of said driving wheels, decreasing a rotating force of said drive wheels to suppress a slip, and for outputting a control signal to said suspension control means to increase the height of said vehicle body relative to said driving wheels.

Claim 12

The vehicle according to claim 9, wherein said suspension devices comprise passive type suspension devices capable of adjusting a vehicle height by air pressure, and said suspension control means receives the control signal and pneumatically controls said suspension devices to increase the height of the vehicle body where said drive wheels are arranged.

Claim 13

The vehicle according to claim 9, wherein said suspension devices comprise active type suspension devices which comprise vehicle body height detection means for detecting the vehicle body height relative to said driving wheels and are feedback controlled to maintain a predetermined vehicle body height on the basis of detected results from said vehicle body height detection means.

Claim 14

A vehicle which comprises: a power unit; at least a pair of driving wheels rotated by an output from said power unit; vehicle body height detection means for detecting a height of a vehicle body relative to said driving wheels where said driving wheels are arranged; fluid pressure cylinders inserted between said vehicle body and said driving wheels for adjusting the height of said vehicle body where said driving wheels are arranged; a fluid pressure source for supplying a high-pressure working fluid to said fluid pressure cylinders; flow control means for controlling supply and discharge of the high-pressure working fluid to and from said fluid pressure source to obtain a predetermined vehicle body height on the basis of the detected result from said vehicle height detection means; slip detection means for detection of a driving force slip of said driving wheels; brake control means for decreasing the rotating force of said driving wheels and for outputting a control signal on the detection of slip; slip suppressing means for operating, when said slip detection means detects a slip of said driving wheel, said brake means to suppress the slip; and suspension control means for receiving said control signal from said brake control means and controlling said flow control means to begin to increase the vehicle body height relative to said driving wheels before said slip suppressing operation is performed by said slip suppressing means.

Claim 15

A vehicle which comprises: a power unit; at least a pair of driving wheels rotated by an output from said power unit; vehicle body height detection means for detecting a height of a vehicle body relative to said driving wheels where said driving wheels are arranged; fluid pressure cylinders inserted between said vehicle body and said driving wheels for adjusting the height of said vehicle body where said driving wheels are arranged; a fluid pressure source for supplying a high-pressure working fluid to said fluid pressure cylinders; flow control means for controlling supply and discharge of the high-pressure working fluid to and from said fluid pressure source to obtain a predetermined vehicle body height on the basis of the detected result from said vehicle height detection means; slip detection means for detection of a driving force slip of said driving wheels; brake control means for decreasing the rotating force of said driving wheels and for outputting a control signal on the detection of slip; slip suppressing means for operating, when said slip detection means detects a slip of said driving wheel, said brake means to suppress the slip; and suspension control means for receiving said control signal from said brake control means and controlling said flow control means to begin to increase the vehicle body height relative to said driving wheels before said slip suppressing operation is performed by said slip suppressing means.

Claim 16

The vehicle according to claim 12, wherein aid suspension control means corrects the detection signal from said vehicle height detection means to increase the vehicle height of said vehicle body where said driving wheels are arranged.

Claim 17

The vehicle according to claim 12, wherein aid driving means are rear wheels, and said suspension control means functions to cause said flow control means to supply high-pressure working fluid to said fluid pressure cylinders when the slip suppressing control operation is started.

Claim 18

The vehicle according to claim 12, wherein said slip suppressing means comprises power unit control means for, when a slip is detected, decreasing an output from said power unit.

Claim 19

The vehicle according to claim 15, wherein when a slip ratio detected by said slip detection means is small, said slip suppressing means causes said power unit control means to decrease the output of said power unit to suppress a slip, and when the slip ratio detected by said slip detection means is large, said slip suppressing means causes said power unit control means to decrease the output of said power unit and operates said brake means to suppress a slip.

Claim 20

The vehicle according to claim 16, wherein said power unit functions to control the open and closed state of a throttle valve of said power unit.