Abstract: In order to provide a suspension which is inexpensive and light in weight and which can attain substantially improved vehicle-riding comfort without lowering drivability, an axle is hanged from a chassis side (side rails) by resilient supports (leaf and air springs) with different spring characteristics arranged forwards and rearwards of the axle. The axle 1 is allowed to make rolling motion due to difference in spring characteristic between the forward and rearward resilient supports.

Abstract: Disclosed are a stabilizer with conventionally unattainable, extreme swift effectiveness and an air leaf suspension using the stabilizer. The stabilizer has a stabilizer bar 18 which is U-shaped when seeing from above and which has a portion 18a laterally extending along and rotatably connected to an axle 3, and a pair of upwardly convergent stabilizer links 19 which connect opposite longitudinally extending ends of the stabilizer bar to a chassis frame side above them.

Abstract: An air suspension has a hollow axle beam 1 suspended from opposite side rails 3 via air springs 5. In order to supplement volumes of the respective air springs 5 without addition of new tank equipment, an inner space of the axle beam 1 is divided by an intermediate partition 12 into two divided spaces which are respectively communicated as surge tanks 13 with the air springs 5 for supplement of the volumes of the air springs 5.

Abstract: In order to provide a suspension which is inexpensive and light in weight and which can attain substantially improved vehicle-riding comfort without lowering drivability, an axle 1 is hanged from a chassis side (side rails 4) by resilient supports (leaf and air springs 2 and 3) with different spring characteristics arranged forwards and backwards of the axle. The axle 1 is allowed to make rolling motion due to difference in spring characteristic between the forward and backward resilient supports.

Abstract: A rear part of a vehicle body is supported by a rear-front axle (18) and a rear-rear axle (20), and right and left rear-front wheels (17) rotatably mounted at opposite ends of the rear-front axle (18) are constituted so as to be steered by a steering mechanism. The steering mechanism is driven by an actuator so as to steer the rear-front wheels (17), and the actuator (51) is controlled by the control means. The control means stops the steering of the rear-front wheels (17) when a vehicle speed is approximately zero, and the control means operates the actuator when a difference between a theoretical steering angle of the rear-front wheels (17), relative to that of the front wheels (15), and an actual steering angle exceeds a predetermined value even though the vehicle speed is approximately zero.

Abstract: Disclosed are a stabilizer with conventionally unattainable, extreme swift effectiveness and an air leaf suspension using the stabilizer. The stabilizer has a stabilizer bar 18 which is U-shaped when seeing from above and which has a portion 18a laterally extending along and rotatably connected to an axle 3, and a pair of upwardly convergent stabilizer links 19 which connect opposite longitudinally extending ends of the stabilizer bar to a chassis frame side above them.

Abstract: A power steering and limited slip differential system is provided with a main booster generating a steering effort for front wheels, a directional control valve having a pair of reaction chambers and a friction clutch disposed between a differential gear mechanism and a driving wheel axle for rear wheels and is further added with an auxiliary booster generating a compensation steering effort for the front wheels and a clutch control air cylinder for coupling and decoupling the friction clutch.

Abstract: A power steering device for steering the wheels of a motor vehicle has a booster mechanism, a directional control valve mechanism, a hydraulic pump mechanism, an oil pressure setting valve and a pressurized oil injection valve mechanism. The booster mechanism receives pressurized oil from different directions and generates a steering force to steer the wheels of the vehicle in a left or right direction depending on from which direction the pressurized oil is received. The hydraulic pump mechanism pressurizes hydraulic oil from an oil reserve and supplies the pressurized oil to a feeding side hydraulic pump arrangement. The directional control valve mechanism is connected to the feeding side hydraulic pump arrangement and the booster mechanism and controls which direction the pressurized oil flows from the booster. The directional control valve mechanism has first and second reaction chambers.

Abstract: A limited slip differential for a vehicle comprises a friction clutch disposed between a differential gear mechanism and a drive wheel axle, a clutch control cylinder for coupling and decoupling the friction clutch, a normally closed type solenoid valve for charging compressed air to the cylinder from a pressure air source and a normally opened type solenoid valve for discharging compressed air from the cylinder to the air. The normally closed type and normally opened type solenoid valves are operated by a control unit in response to a low .mu. road start, a low .mu. road run, a straight run and a brake so as to charge and discharge compressed air to and from the cylinder and thereby to control air pressure in the cylinder. A power device for a vehicle is composed by adding an engine control cylinder disposed in an acceleration control mechanism and an engine control valve for charging and discharging compressed air to the cylinder, and wherein during a low .mu.

Abstract: A power steering system for use in a motor vehicle is disclosed.

Abstract: An automated mechanical transmission system for use in commercial vehicles comprises an oil spray type oil hydraulic clutch, a mechanical transmission having a shift cylinder, a shift valve, a select cylinder, and a select valve, a hydraulic system control circuit, a clutch oil spray circuit, and a clutch/transmission select valve. The oil hydraulic clutch includes an oil hydraulic clutch servo cylinder for sandwiching a clutch disk between a pressure plate and a clutch cover, the system control circuit includes a high pressure side and a low pressure side hydraulic clutch control lines connected with the clutch servo cylinder, and a hydraulic transmission control line connected with the shift cylinder and select cylinder through the shift valve and select valve. A pressure control valve actuated by a pressure control pilot valve is disposed at the low pressure side hydraulic clutch control line.

Abstract: A power steering system for use in a large vehicle comprises: a main booster; an auxiliary booster; a main hydraulic line for connecting the main booster to a hydraulic pump; an auxiliary hydraulic line branching off from the main hydraulic line and connecting the auxiliary booster to the hydraulic pump; a control valve disposed in the main hydraulic line; a reaction pressure supply passage for the control valve; a reaction pressure supply-side variable throttle disposed in the reaction pressure supply passage; a reaction pressure relief-side variable throttle disposed in a reaction pressure relief passage for the control valve; and a load sensing valve. A controller opens and closes the variable throttles in response to the vehicle speed to control the flow rate of hydraulic oil flowing into a reaction chamber of the control valve and flowing out from the reaction chamber, and a hydraulic reaction force generated in the control valve is controlled.

Abstract: A power steering assembly for a large vehicle including a primary booster, an auxiliary booster, a primary hydraulic oil pipe adapted to connect the primary booster to the hydraulic pump, an auxiliary hydraulic oil pipe branched off from the primary hydraulic oil pipe and adapted to connect the auxiliary booster to the hydraulic pump, a control valve provided to the primary hydraulic oil pipe at an upper stream side from the place where the auxiliary hydraulic oil pipe is branched off, and a load sensing valve provided to the auxiliary hydraulic oil pipe. When the load of the primary booster is small, the oil pressure of the primary booster is low, the load sensing valve is closed, and only the primary booster is driven, whereas when the load of the primary booster becomes large, the oil pressure of the primary booster is high, the load sensing valve opened, and the auxiliary booster is driven in association with the primary booster to supplement the steering power of the primary booster.