摘要:
A surface cleaning head is provided comprising a dome-shaped, downwardly open housing, in which at least one spray arm is mounted for rotation about an axis of rotation, wherein the spray arm bears at a distance from the axis of rotation a nozzle which can be acted upon with cleaning fluid subject to pressure and revolves around the axis of rotation together with the spray arm, and comprising a protective disk which covers the at least one spray arm towards the open underside of the housing and defines a ring-shaped fluid passage for a stream of fluid to pass through, said fluid passage being penetrated by retaining bars, wherein the at least one spray arm is rotatable relative to the protective disk. The retaining bars are arranged so as to be distributed unevenly in circumferential direction.
摘要:
A coupling part for a plug connector arrangement is provided. The coupling part having a coupling body comprising a receptacle into which a plug-in part can be plugged into in the direction of a longitudinal axis of the receptacle, in order to produce a fluid-tight connection. The coupling part has two spaced-apart locking elements which, in a locking position, penetrate laterally, opposite one another, into the receptacle in order to engage behind the plug-in part and which can be moved into a release position in order to release the plug-in part. A spring element is integrally formed with and connects the locking elements together. In order to develop the coupling part so that it is easier to handle, the coupling part is provided with an actuating element which is adapted to be moved relative to the coupling body. Movement of the actuating element causes the locking elements to be moved out of the locking position into the release position, in which they are spaced apart from one another to a greater extent than in the locking position.
摘要:
A fuel cell system which including a fuel cell, a fuel tank and a consumer unit, to improve the operation of a fuel cell, is equipped with a consumption-optimizing unit that limits or interrupts the energy supply to one or more consumers of the consumer unit depending on the fill level of the fuel tank in order to ensure at least the basic function of the fuel cell system for as long as possible.
摘要:
An electrohydraulic brake system as well as a method and a device for controlling the electrohydraulic brake system, in which a hydraulic fluid can be injected from an accumulator into corresponding wheel brake cylinders by valve means, where the hydraulic fluid can be delivered to the accumulator by a pump, whereby means are provided for measuring the temperature of the electrohydraulic brake system, in particular the temperature of the hydraulic fluid, as well as means for taking into account the measured temperature for open- and closed-loop control of the electrohydraulic brake system.
摘要:
A method and a device for check-testing a braking system in which, before travel commences, a self-test of the braking system is performed. During the course of the self-test, the valve arrangements allocated to the wheel brakes and the pressure supply providing the brake pressure are driven in a predefined manner. A plurality of test phases are provided, after whose respective conclusions, a pressure level to be expected should be reached. Otherwise a secondary braking operation is initiated at least for the subsequent operating cycle of the vehicle.
摘要:
The invention relates to a hydraulic vehicle brake system with a hydraulic pump and a high pressure hydraulic accumulator for external power braking and a conventional master cylinder that is used as a braking power set point adjuster for external power braking and is used to actuate the brake system by muscle power in the event of a failure of the external power brake system. The system connects an intake side of the hydraulic pump to a low pressure hydraulic accumulator into which brake fluid travels from the wheel brake cylinders when the wheel brake pressure decreases. The system has the advantage that no connections of the hydraulic pump to a reservoir of the master cylinder are necessary, which in the event of a leak, would jeopardize the function of both the external power service brake system and the muscle power auxiliary brake system.
摘要:
A rotary nozzle for a high-pressure cleaning apparatus has a housing into which a feed line for a cleaning fluid issues, an outlet provided in the housing for expelling the cleaning fluid, a nozzle body through which the cleaning fluid flows, and a bearing that surrounds the outlet. The nozzle body is disposed in the housing, and is supported at its convex end in the bearing. The bearing is formed directly in an inner wall of the housing as a conically-shaped depression to avoid the need for a separate bearing insert, thereby simplifying the manufacturing process. Additionally, the conical shape of the bearing cooperates with the convex shape of the nozzle body to provide optimal sealing with a reduced contact surface for a long service life. The bearing is disposed concentrically relatively to the outlet. The nozzle body is set by the flow of cleaning fluid through the housing in a revolving movement in which a longitudinal axis of the nozzle body revolves on a generated cone.
摘要:
A central control module generates nominal values for braking based on a pedal input value form a pedal sensor which detects actuation of the brake pedal by the driver, and sensor signals representing wheel speeds. First and second brake control modules transmit sensor signals to the central module, receive nominal values from the central module, and transmit nominal values to the actuators. The first brake control module receives the pedal input value from the pedal sensor directly, and calculates the nominal values as a function of the pedal input value when the central module has failed.
摘要:
The invention relates to a method and an apparatus for converting the energy of an energy storage (2) for operating an arc (6), wherein in order to convert energy, at least one switch (9) of a step-down converter is switched on and off in a controlled manner, wherein said at least one switch (9) is connected to the energy storage (2) at the input end. In order to be able to supply as much of the limited energy available from the energy store (2) to the arc (6), it is provided that a synchronous converter is used as the step-down converter for operating the arc (6), and that the at least one switch (9) of the synchronous converter that is designed as a power unit (3) is connected to a snubber circuit (10) at the output end such that at least the switch (9) is switched on and off in an snubbed state.
摘要:
The invention relates to a method and an apparatus for converting the energy of an energy storage (2) for operating an arc (6), wherein a power unit (3) and an input and/or output device (5) for setting the current for operating the arc (6) is used to convert energy, as well as an appropriate welding device. In order to be able to provide the user with information on the state of energy storage (2), the time remaining for operating the arc (6) using the set current is calculated depending on a determined capacity of the energy storage (2) and a value for the current set on the input and/or output device (5), and said time is displayed on a corresponding display unit (27).