公开(公告)号：US20150030485A1

公开(公告)日：2015-01-29

申请号：US14386238

申请日：2013-03-13

Applicant: VHIT S.P.A.

Inventor： Leonardo Cadeddu ,  Matteo Cortesi

IPC: F04C14/22 ,  F04C11/00 ,  F04C15/00 ,  F04C2/344

CPC classification number: F04C14/223 ,  F04C2/3441 ,  F04C2/3442 ,  F04C11/006 ,  F04C15/0042

Abstract: A rotary positive displacement pump for fluids, in particular for the lubrication oil of a motor vehicle engine (60), has a displacement that can be regulated by means of the rotation of a stator ring (12) having an eccentric cavity (13) in which the rotor (15) of the pump (1) rotates. The stator ring (12) is configured as a multistage rotary piston for displacement regulation and is arranged to be directly driven by a fluid under pressure, in particular oil taken from a delivery side (19) of the pump or from a point of the lubrication circuit located downstream the oil filter (62). The invention also concerns a method of regulating the displacement of the pump (1) and a lubrication system for a motor vehicle engine in which the pump (1) is used.

Abstract translation: 用于流体的旋转容积式泵，特别是用于机动车辆发动机（60）的润滑油的旋转容积式泵具有能够通过具有偏心腔（13）的定子环（12）的旋转来调节的位移 其中泵（1）的转子（15）旋转。 定子环（12）被构造为用于位移调节的多级旋转活塞，并且被布置成由压力下的流体直接驱动，特别是从泵的输送侧（19）或从润滑点 位于油过滤器（62）下游的回路。 本发明还涉及一种调节泵（1）的位移和用于其中使用泵（1）的机动车辆发动机的润滑系统的方法。

公开(公告)号：US20200247377A1

公开(公告)日：2020-08-06

申请号：US15774510

申请日：2016-12-09

Applicant: VHIT S.p.A.

Inventor： Leonardo Cadeddu

IPC: B60T11/21

Abstract: A pressure balancing system for a pair of tandem master cylinders. Each tandem master cylinder includes a primary plunger, a secondary plunger, a primary chamber, a secondary chamber and a secondary preload sub-assembly, comprising a secondary preload pin and a secondary preload case. The pressure balancing system comprises a primary balancing system and a secondary balancing system. The primary balancing system includes a primary balancing duct establishing communication of a primary balancing channel with the master cylinder at a region occupied by the secondary plunger when the latter is in an initial rest position, and a primary balancing O-ring forming a primary balancing valve between the primary balancing duct and the primary chamber. The secondary balancing system comprises a secondary balancing duct formed within the secondary preload pin and a second end ending with at least one radial hole, and a secondary balancing O-ring fixed to the secondary preload case.

公开(公告)号：US10532723B2

公开(公告)日：2020-01-14

申请号：US16064071

申请日：2016-12-07

Applicant: VHIT S.P.A.

Inventor： Leonardo Cadeddu

IPC: B60T13/14 ,  B60T11/236

Abstract: A hydraulic device for controlling braking for farm tractors, earthmovers and like machines, comprises a master cylinder and brake booster. A piston of the brake booster defines first and second chambers which, under rest conditions, are in communication and, during braking, are cut off with the first chamber being put in communication with a discharge chamber of the master cylinder. The piston of the master cylinder is driven by a drive piston shaped to define with a plunger of the piston of the brake booster a hollow space through which the first chamber communicates with either the second chamber or the discharge chamber, depending on device operating conditions. In the plunger, a seat for a gasket-valve is arranged to cooperate with the drive piston, during braking, to prevent fluid leakage between the second and the first chamber as a consequence of the sliding of the drive piston caused by braking.

公开(公告)号：US10449940B2

公开(公告)日：2019-10-22

申请号：US15754432

申请日：2016-09-02

Applicant: VHIT S.p.A.

Inventor： Leonardo Cadeddu

IPC: B60T13/14 ,  B60T7/12 ,  B60T13/24 ,  B60T13/38 ,  B60T15/38 ,  B60T15/42 ,  B60T17/04 ,  B60T17/22 ,  F15B7/08 ,  F16K31/122

Abstract: A pre-filling device for a braking system. The pre-filling device includes a pre-filling channel, a pre-filling pressure being inside the channel when the braking system is in a rest and hydro-boost position, and a mechanical valve configured to be opened following a transition from the rest and hydro-boost position to a working position of the braking system; and a hydraulic valve cooperating with the mechanical valve setting the pre-filling pressure inside the channel. The hydraulic valve includes in a first area, facing the mechanical valve, a hole communicating with the channel, and in a second area, hydraulically isolated from the first area, a preloaded resilient element in a chamber held at atmospheric pressure. The hydraulic valve is configured to be connected or not to be connected, by a reciprocating movement inside the channel, to a hydro-booster device and to keep a predetermined pre-filling pressure upon varying of the hydro-boost pressure.

公开(公告)号：US09765778B2

公开(公告)日：2017-09-19

申请号：US14386238

申请日：2013-03-13

Applicant: VHIT S.P.A.

Inventor： Leonardo Cadeddu ,  Matteo Cortesi

IPC: F03C4/00 ,  F04C21/00 ,  F04C23/00 ,  F04C9/00 ,  F04C14/18 ,  F04C28/18 ,  F04B49/08 ,  F04C14/22 ,  F04C11/00 ,  F04C15/00 ,  F04C2/344

CPC classification number: F04C14/223 ,  F04C2/3441 ,  F04C2/3442 ,  F04C11/006 ,  F04C15/0042

Abstract: A rotary positive displacement pump for fluids, in particular for the lubrication oil of a motor vehicle engine (60), has a displacement that can be regulated by means of the rotation of a stator ring (12) having an eccentric cavity (13) in which the rotor (15) of the pump (1) rotates. The stator ring (12) is configured as a multistage rotary piston for displacement regulation and is arranged to be directly driven by a fluid under pressure, in particular oil taken from a delivery side (19) of the pump or from a point of the lubrication circuit located downstream the oil filter (62). The invention also concerns a method of regulating the displacement of the pump (1) and a lubrication system for a motor vehicle engine in which the pump (1) is used.

公开(公告)号：US09404495B2

公开(公告)日：2016-08-02

申请号：US14386229

申请日：2013-03-13

Applicant: VHIT S.P.A.

Inventor： Leonardo Cadeddu

IPC: F03C2/00 ,  F03C4/00 ,  F04C2/00 ,  F04C14/22 ,  F04C18/344 ,  F04C18/356 ,  F04C2/344

CPC classification number: F04C14/226 ,  F04C2/3441 ,  F04C2/3446 ,  F04C14/223 ,  F04C18/3441 ,  F04C18/3446 ,  F04C18/3564

Abstract: A rotary positive displacement pump for fluids, in particular for the lubrication oil of a motor vehicle engine (60), has a displacement that can be regulated by the rotation of a stator ring (112) having an eccentric cavity (113) in which the rotor (15) of the pump (1) rotates. The stator ring (112) is located in an eccentric cavity (13) of an external ring (12), which is configured as a multistage rotary piston for displacement regulation and is arranged to be directly driven by a fluid under pressure, in particular oil taken from a delivery side (19) of the pump or from a point of the lubrication circuit located downstream of the oil filter (62). A method of regulating the displacement of the pump (1) and a lubrication system for the engine of a motor vehicle in which the pump (1) is used.

Abstract translation: 用于流体的旋转容积式泵，特别是用于机动车辆发动机（60）的润滑油的旋转容积式泵具有通过具有偏心腔（113）的定子环（112）的旋转来调节的位移，其中， 泵（1）的转子（15）旋转。 定子环（112）位于外环（12）的偏心腔（13）中，其被配置为用于位移调节的多级旋转活塞，并且被布置成由压力下的流体（特别是油）直接驱动 从泵的输送侧（19）或从位于油过滤器（62）下游的润滑回路的点取出。 一种调节泵（1）的位移的方法和用于其中使用泵（1）的机动车辆的发动机的润滑系统。

公开(公告)号：US11951954B2

公开(公告)日：2024-04-09

申请号：US16620564

申请日：2018-06-05

Applicant: VHIT S.p.A. Societa Unipersonale

Inventor： Leonardo Cadeddu

IPC: B60T13/14 ,  B60T11/16

CPC classification number: B60T13/145 ,  B60T11/165

Abstract: A hydraulic braking device comprising a master cylinder and a brake booster. The braking device comprises a control piston driven by actuating a brake pedal and mounted so as to be tightly slidable in a plunger of a piston of the brake booster. The control piston comprises a first end portion having a certain cross-sectional area and being arranged to cooperate with a gasket so as to establish, during braking, a modulated communication between the first chamber of the brake booster and a discharge chamber of the master cylinder. The braking device has an effective cross-sectional area counter-acting a pressure existing in a region comprised between a master cylinder piston and the control piston. Such area is different from the cross-sectional area of the first end portion of the control piston.

公开(公告)号：US20200232356A1

公开(公告)日：2020-07-23

申请号：US16652339

申请日：2018-10-15

Applicant: VHIT S.P.A. Societa Unipersonal

Inventor： Alessandro Fauda ,  Gabriele Andreolli ,  Leonardo Cadeddu ,  Luciano Marchetti ,  Pietro Francesco Crosio

IPC: F01M11/10 ,  G01N33/28

Abstract: A diagnostic system for a lubrication circuit of an internal combustion engine of a vehicle. The system includes a viscometer for detecting the viscosity of a lubricating liquid of the lubrication circuit, a temperature sensor for detecting the temperature of the lubricating liquid, and a control unit to acquire the state of the lubricating liquid, given by the viscosity detected for a given lubricating liquid condition, which includes the lubricating liquid temperature and the date of last replacement of the lubricating liquid, and for a given condition of use of the engine, and to assess the state of the lubricating liquid by comparing the detected viscosity of the lubricating liquid with the viscosity reference values stored in the database in the same or similar condition of lubricating liquid temperature, date of last replacement of the lubricating liquid and use of the engine.

公开(公告)号：US10434999B2

公开(公告)日：2019-10-08

申请号：US15745627

申请日：2016-07-20

Applicant: VHIT S.p.A. Società Unipersonale

Inventor： Leonardo Cadeddu

IPC: B60T11/10 ,  B60T11/21 ,  B60T11/20 ,  F16K15/02 ,  F16K15/04 ,  F16K15/18 ,  B62D11/08

Abstract: A stroke-controlled balancing device for hydraulic braking systems, comprising a balancing duct, a normally closed balancing valve, configured, in use, to maintain a connection between the hydraulic braking system and the balancing duct either closed or open, a stem having an external surface and an internal surface. A balancing channel is provided on the internal surface of the stem, said channel being hydraulically connected to the balancing duct, and the balancing valve is configured to slide, in use, along the external surface of the stem in order to open the connection between the braking system and the balancing duct. A braking system comprising the balancing device, as well as a method of operation of the braking system, are also described.

公开(公告)号：US09421954B2

公开(公告)日：2016-08-23

申请号：US14651290

申请日：2013-11-27

Applicant: VHIT S.P.A.

Inventor： Leonardo Cadeddu

IPC: F16D49/12 ,  B60T8/40 ,  B60T8/32 ,  B60T8/46 ,  B60T15/36 ,  B60T17/22 ,  B60T13/14 ,  B60T8/34

CPC classification number: B60T8/4013 ,  B60T8/328 ,  B60T8/348 ,  B60T8/46 ,  B60T13/143 ,  B60T15/36 ,  B60T17/221 ,  B60T17/222

Abstract: A hydraulic braking system for a farm tractor or the like comprises a first portion, including members (10, 19) for actuating/modulating the braking and operating with a first hydraulic fluid, and a second portion comprising braking members (F) and operating with a second hydraulic fluid incompatible with the first one. An interface device (20) is interposed between the two portions and is arranged to separate the two portions of the system (1) and to prevent fluid passages therebetween. A method of managing such a braking system (1) is also provided.

Abstract translation: 用于农用拖拉机等的液压制动系统包括第一部分，包括用于致动/调节制动并用第一液压流体操作的构件（10,19），以及包括制动构件（F）并且与 与第一液压流体不兼容的第二液压流体。 接口装置（20）插入在两个部分之间，并且被布置成分离系统（1）的两个部分并且防止其间的流体通道。 还提供了一种管理这种制动系统（1）的方法。