摘要:
Devices for producing vacuum using the Venturi effect are disclosed that have a housing defining a suction chamber, a motive passageway converging toward the suction chamber and in fluid communication therewith, a discharge passageway diverging away from the suction chamber and in fluid communication therewith, and a suction passageway in fluid communication with the suction chamber. Within the suction chamber, a motive exit of the motive passageway is generally aligned with and spaced apart from a discharge entrance of the discharge passageway to define a Venturi gap, and the suction passageway enters the suction chamber at a position that generates about a 180 degree change in the direction of suction flow from the suction passageway to the discharge passageway. Also or alternately, the motive passageway terminates in a spout protruding into the suction chamber disposed spaced apart from all one or more sidewalls of the suction chamber.
摘要:
Die Erfindung betrifft ein Verfahren zum Betrieb einer Vakuumpumpe (12) wie Schraubenrotor-Vakuumpumpe oder Drehkolben-Vakuumpumpe zum Fördern von Luft- und/oder Abwasser in einem Unterdruck-Entwässerungssystem, wobei die Vakuumpumpe (12) mit einem Antrieb (22) gekoppelt ist, dessen Drehzahl mittels eines Frequenzumrichters (30) gesteuert bzw. geregelt wird, wobei die Vakuumpumpe (12) eingeschaltet wird, wenn ein Unterdruck in einem Ansaugrohr (24) der Vakuumpumpe (12) unter einen vorgegeben Grenzwert fällt. Um bei kostengünstiger und kompakter Bauweise den Schutz der Vakuumpumpe in Gefahr bringenden Betriebssituationen, insbesondere bei Trockenlauf der Vakuumpumpe zu verbessern, wird vorgeschlagen, dass die Drehzahl der Vakuumpumpe (12) in Abhängigkeit eines fortlaufend in der Ansaugleitung (24) gemessenen Unterdruck-Istwertes geregelt wird, wobei dann, wenn der Unterdruck-Istwertes einen Unterdruck-Sollwert erreicht, die Drehzahl auf eine reduzierte Drehzahl geregelt und die Vakuumpumpe (12) nach Erreichen des Unterdruck-Sollwertes während einer Nachlaufzeit weiter mit der reduzierten Drehzahl angetrieben und anschließend abgeschaltet wird.
摘要:
An engine system including a first flowpath between a first component and a second component where a first aspirator forms a portion of the first flowpath, and a second flowpath between the first component and the second component, where a second aspirator forms a portion of the second flowpath. A shut-off valve forms a portion of the second flowpath. The first aspirator and the second aspirator each have a suction inlet, and the suction inlet of the first aspirator is in fluid communication with the suction inlet of the second aspirator.
摘要:
The present invention relates to a vehicle braking arrangement (39) for a vehicle (1) with wheels (2, 3) contacting the ground (4) during normal running. The vehicle braking arrangement (39) comprises an emergency brake control unit (12), a first emergency braking system (6) comprising non-reversible braking means (7) arranged to operate independently of the vehicle wheels (2, 3), at least one acceleration detector (35), and a wheel brake anti-locking system (13a, 13b). The emergency brake control unit (12) is arranged to input acceleration data (a) when the wheel brake anti-locking system (13a, 13b) is active, and to calculate the coefficient of friction (µ) between the wheels (2, 3) and the ground (4). The emergency brake control unit (12) is arranged to determine if the first emergency braking system (6) should be activated in dependence of a first plurality of parameters, where one of these parameters is the coefficient of friction (µ). The present invention also relates to a corresponding method.
摘要:
A safety apparatus for a brake of a vehicle is provided. The safety apparatus for a brake of a vehicle includes a first line and a second line. The first line includes an exhaust manifold 1, an engine 2, an intake manifold 3, a check valve 4, a vacuum hose 5, a vacuum switch 6, a booster 7, a check valve 8, a vacuum hose 9, a negative connection portion 10, a vacuum switch 11 and a brake booster 12, and the second line includes a vacuum hose 15, a check valve 16, a booster 17, a check value 18, a vacuum hose 19 and a vacuum pump 20, which are connected to the negative connection portion 10. The safety apparatus can isolate a supply of electric power to a fuel motor to stop starting of the engine when the brake booster lacks a vacuum because of a deterioration of a performance of an auxiliary vacuum pump, and enable the brake to normally operate so as to prevent an accident even though a sudden acceleration occurs or the engine suddenly stops.
摘要:
A vehicle control device 1, that controls to suppress a driving force of a vehicle based on an operation of a brake pedal 60 operated when a braking force is generated by a braking device 40, wherein the brake pedal 60 is connected to a brake booster 44, that increases an operating force input to the brake pedal 60 by using a brake negative pressure to transmit to brake fluid of the braking device 40 in order to appropriately control by appropriately detecting the operation of the brake pedal 60; and the driving force is suppressed according to an M/C pressure when the brake negative pressure is higher than a brake negative pressure threshold value, and the driving force is suppressed according to an operation state of the brake pedal 60 when the brake negative pressure is equal to or lower than the brake negative pressure threshold value.
摘要:
A method for monitoring the signal value of a vacuum sensor of a vacuum system in a vehicle, wherein a vacuum generator and a brake booster are provided in the vacuum system, an upper error threshold (-p_vac_errorthreshold) is calculated as a function of the operating states of the vacuum generator and of the brake booster, and wherein an error is identified when the signal value of the vacuum sensor exceeds the current value of the error threshold.
摘要:
A vacuum reservoir (22) of a pneumatically operated power assist aggregate (30) of a motor vehicle is subjected to a vacuum by an electrical suction pump (28). In order to monitor the vacuum reservoir (22) and the electric suction pump (28), the invention provides that an initial pressure in the vacuum reservoir (22) is determined. In addition, a final pressure in the vacuum reservoir (22) is determined after a defined time interval. Furthermore, the difference between the final pressure and the initial pressure is established and compared with a limiting value. When the limiting value is surpassed, a signal is generated, in particular, a warning and/or alarm signal.