摘要:
Verdrängerpumpe mit verstellbarem Fördervolumen, um eine das Kraftfahrzeug antreibende Brennkraftmaschine mit Schmieröl zu versorgen, die Verdrängerpumpe mit einem Verstellventil (20), das folgendes umfasst: - ein Ventilgehäuse (21), - einen in dem Ventilgehäuse (21) beweglich gelagerten Ventilkolben (22) mit einer Wirkfläche (23) für einen Ventilstelldruck (P 20 ) eines Fluids, - eine Ventilfeder (25), die einer von dem Ventilstelldruck (P 20 ) auf den Ventilkolben (22) ausgeübten Kraft entgegen wirkt, - eine Verstelleinrichtung (27, 28), mittels der der Ventilkolben (22) in Richtung der vom Ventilstelldruck (P 20 ) ausgeübten Kraft oder gegen diese Kraft verstellbar ist, wobei der Ventilkolben (22) eine weitere Wirkfläche (24) für den Ventilstellruck (P 20 ) aufweist und die Wirkflächen (23, 24) einander entgegen wirkend angeordnet und der Größe nach unterschiedlich sind, um dem Größenunterschied der Wirkflächen (23, 24) entsprechend eine auf den Ventilkolben (22) der Ventilfeder (25) entgegen wirkende Differenzkraft zu erzeugen.
摘要:
It is aimed to enhance compressor efficiency by both reducing an amplitude of pressure pulsations and reducing pressure losses in a discharge muffler space into which is discharged a refrigerant compressed at a compression unit. A low-stage discharge muffler space (31) is formed in the shape of a ring around a drive shaft (6). In the low-stage discharge muffler space (31), a discharge port rear guide is provided in the proximity of a discharge port (16) through which is discharged the refrigerant compressed by a low-stage compression unit (10). The discharge port rear guide is provided at a flow path in one direction out of two flow paths from the discharge port (16) to a communication port (34) in different directions around the drive shaft (6), and prevents the refrigerant from flowing in that direction, thereby causing the refrigerant to circulate in a forward direction in the ring-shaped discharge muffler space.
摘要:
A fuel delivery system provides closed loop mass flow control between a metering valve (250) and a pump (208). Changes in pressure across the valve are monitored and pump operation is altered in response. A thermal controller (290) monitors fuel temperature and recirculates a portion of fuel through a heat exchanger (202). The system can be provided as original equipment or a retrofit.
摘要:
Die Erfindung betrifft eine Kompressoranlage (01) mit einem Anlagen-Gehäuse (02), in welchem Wärme erzeugende Anlagenkomponenten (06) angeordnet sind, die mindestens eine Verdichterstufe (201) zur Verdichtung eines gasförmigen Mediums umfassen. Weiterhin besitzt die Kompressoranlage (01) einen Luft-Wasser-Kühler (12), ein Gebläse (15), welches einen Kühlluftstrom (16) erzeugt, und Luftleitelemente, welche die von den Anlagenkomponenten (06) erwärmte Luft zu dem Luft-Wasser-Kühler (12) führen. Erfindungsgemäß ist ein Kühlluftkanal (07) ausgebildet, der eine Einlassöffnung (08) im oberen Abschnitt des Anlagen-Gehäuses (02) und eine Auslassöffnung (09) im unteren Abschnitt des Anlagen-Gehäuses (02) aufweist, wobei obere Luftleitelemente (13) positioniert sind, um den Kühlluftstrom (16) nach Durchströmen des Luft-Wasser-Kühlers (12) zur Einlassöffnung (08) zu führen, und untere Luftleitelemente (17) positioniert sind, um den Kühlluftstrom (16) von der Auslassöffnung (09) zu den Anlagenkomponenten (06) zu führen.
摘要:
A variable displacement vane pump includes: a control orifice 104 that imparts resistance to a flow of working oil discharged from pump chambers 6; a flow-amount control valve 102 that operates in accordance with an upstream-downstream differential pressure of the control orifice 104 and controls a flow amount of the working oil discharged from the pump chambers 6; a variable control valve 103 that is operated by the working oil that has passed through the control orifice 104 and controls an amount of eccentricity of a cam ring 4 with respect to a rotor 2 by controlling a pressure difference between a first fluid pressure chamber 15 and a second fluid pressure chamber 16; and a return passage 42 that is connected to the flow-amount control valve 102 and circulates a part of the working oil discharged from the pump chambers 6 through a suction passage 40.
摘要:
An electric compressor integral with a drive circuit incorporates a compression mechanism section, a motor for driving the compression mechanism section, and a motor drive circuit. A refrigerant gas chamber having a refrigerant gas expansion space, into which refrigerant gas is introduced, is formed between a drive circuit installation section and a motor installation section, by a first partition wall provided on the drive circuit side and a second partition wall provided on the motor side, the side opposite the drive circuit side. The refrigerant gas chamber is interrupted by the first partition wall against the drive circuit installation section and is communicated with the motor installation section by a through hole that is provided in the second partition wall and through which the refrigerant gas can pass. Heat generating components, particularly in the drive circuit, can be easily and effectively cooled, and also on the motor installation side, cooling of the motor and lubrication of a bearing section can be easily and excellently performed.
摘要:
A flow control system for controlling a variable displacement pump including a metering valve in fluid communication with the pump for metering an output of the pump. A regulating valve receives a portion of the output of the pump as a bypass flow at a first pressure, wherein an output of the regulating valve is at an interim pressure. The interim pressure is substantially equal to an average of the first pressure and a low reference pressure. An actuator sets a displacement of the pump by acting on a piston connected to a cam ring of the pump. The actuator receives the interim pressure and, thereby, the output of the variable displacement pump is determined.
摘要:
The invention relates to a valve (1) for a pump (2), comprising a spring (3), whose length (4) does not change proportionally in relation to the force (5) that acts on the spring (3). The spring (3) has at least one first longitudinal zone (6) with a first spring constant (7) and a second longitudinal zone (8) with a second spring constant (9), the first spring constant (7) being smaller than the second spring constant (9). The valve is configured as a flow control valve (10) of a vane pump (11), the first longitudinal zone (6) lying adjacent to an axial section (13) of a control piston (14), said section being configured as a guide pin (12) in a valve bore (15) of the flow control valve (10). The use of the spring permits the characteristic curve of the vane pump to remain linear even at high volumetric flows.