A steering shaft for a motor vehicle steering system may be used in connection with a variety of power assistance mechanisms. The steering shaft may comprise a first shaft part and a second shaft part that are rotationally-elastically coupled by way of a torsion bar. In order to transmit torque, the torsion bar may be received in a bore of the first shaft part and coupled to both the first and second shaft parts. In many cases, a first end of the torsion bar is coupled to the first shaft part, and a second end of the torsion bar is coupled to the second shaft part. The torsion bar may be mounted in the bore such that it can be rotated with respect to the first shaft part via a bearing element. In some examples, the bearing element comprises a prestressing element.

A method and application for eliminating gaseous cavitation. The method allows for the determination of the types of problems that cause cavitation, such as RPM, temperature, differential pressure and flow rate, as well as the application of possible techniques for the permanent solution of gaseous cavitation in the power steering system in heavy-duty vehicles.

A method and application for eliminating gaseous cavitation. The method allows for the determination of the types of problems that cause cavitation, such as RPM, temperature, differential pressure and flow rate, as well as the application of possible techniques for the permanent solution of gaseous cavitation in the power steering system in heavy-duty vehicles.

The invention discloses a method of providing oil power steering and control in coordination with the engine oil pump. The emergency steering pump includes a pneumatic clutch and a displacement pump. The pneumatic clutch includes a clutch outer transmission shaft and a clutch inner transmission shaft. The variable displacement pump is provided with a pump shaft. The clutch outer transmission shaft is connected to the gearbox and the clutch inner transmission shaft is connected to the pump shaft, and a clutch disc is provided between the clutch outer transmission shaft and the clutch inner transmission shaft. When the pneumatic clutch is not ventilated, the clutch disc is in a combined state, and the clutch outer transmission shaft and the clutch inner transmission shaft are connected. When the pneumatic clutch is ventilated, the clutch disc is in a disengaged state, and the clutch outer transmission shaft and the clutch inner transmission shaft are disconnected. The invention solves the problem of high fuel consumption, high noise, and the absence of emergency steering device when the traditional automobile or hybrid commercial vehicle runs at high speed.

The invention discloses a method of providing oil power steering and control in coordination with the engine oil pump. The emergency steering pump includes a pneumatic clutch and a displacement pump. The pneumatic clutch includes a clutch outer transmission shaft and a clutch inner transmission shaft. The variable displacement pump is provided with a pump shaft. The clutch outer transmission shaft is connected to the gearbox and the clutch inner transmission shaft is connected to the pump shaft, and a clutch disc is provided between the clutch outer transmission shaft and the clutch inner transmission shaft. When the pneumatic clutch is not ventilated, the clutch disc is in a combined state, and the clutch outer transmission shaft and the clutch inner transmission shaft are connected. When the pneumatic clutch is ventilated, the clutch disc is in a disengaged state, and the clutch outer transmission shaft and the clutch inner transmission shaft are disconnected. The invention solves the problem of high fuel consumption, high noise, and the absence of emergency steering device when the traditional automobile or hybrid commercial vehicle runs at high speed.

A hydraulic steering unit (3) is disclosed comprising a working port arrangement (L, R) having two working ports (L, R), a supply port arrangement having a high pressure port (P) and a low pressure port (T), a main flow path (7) having a main bleed (A1) and a metering device (8) and being arranged between said high pressure port (P) and said working port arrangement (L, R), an amplification flow path (9) having an amplification bleed (Au) and being arranged between said high pressure port (P) and said working port arrangement (L, R), said main bleed (A1) and said amplification bleed (Au) being controlled together by means of a steering handle (6) and being closed in neutral position of said steering handle (6), and a drain bleed (Ad) which is open in neutral position of said steering handle (6), said drain bleed (Ad) connecting a point (11) upstream said main bleed (A1) and said amplification bleed (Au) to said low pressure port (T).

A hydraulic steering unit (3) is disclosed comprising a working port arrangement (L, R) having two working ports (L, R), a supply port arrangement having a high pressure port (P) and a low pressure port (T), a main flow path (7) having a main bleed (A1) and a metering device (8) and being arranged between said high pressure port (P) and said working port arrangement (L, R), an amplification flow path (9) having an amplification bleed (Au) and being arranged between said high pressure port (P) and said working port arrangement (L, R), said main bleed (A1) and said amplification bleed (Au) being controlled together by means of a steering handle (6) and being closed in neutral position of said steering handle (6), and a drain bleed (Ad) which is open in neutral position of said steering handle (6), said drain bleed (Ad) connecting a point (11) upstream said main bleed (A1) and said amplification bleed (Au) to said low pressure port (T).

Systems are provided for a steering system. In one example, a steering system includes a hydraulic cylinder configured to adjust a steering angle of wheels coupled to an axle, and a pair of hydraulic ports, each including an inboard section in scaling engagement with an outer circumference of a cylinder tube.

Systems are provided for a steering system. In one example, a steering system includes a hydraulic cylinder configured to adjust a steering angle of wheels coupled to an axle, and a pair of hydraulic ports, each including an inboard section in scaling engagement with an outer circumference of a cylinder tube.

The invention relates to a vehicle comprising front and rear axles, one steering mechanism (6) per axle, comprising a cylinder (7) having a body and two pistons, each associated with a rod and dividing the body into a central chamber extending between the pistons and two end chambers, said vehicle comprising a first configuration wherein the wheels (4, 5) of a single axle extend in parallel planes, and a second O-shaped configuration wherein the wheels (4, 5) are arranged on a circle, and a configuration selector. The vehicle comprises, for fluid connection of the cylinders (7) of the steering mechanisms (6) to the source or sources (17, 18) of pressurised fluid, a first circuit (15) of fluid active in the first configuration, and a second circuit (16) of fluid active in the second configuration, the second circuit (16) being, for the cylinder (7) of each steering mechanism (6), configured so that when the central chamber of said cylinder forms an inlet chamber, the end chambers of said cylinder form exhaust chambers, and vice versa, this second circuit (16) of fluid being equipped with a flow divider (25).