654 results about "Hydraulic control unit" patented technology

A sub-sea mud pump system includes a plurality of pump units, and each pumping unit includes a plurality of pumping elements. Each pumping element includes a pressure vessel with a first and a second chamber, a separating member between the first and second chambers, a measurement device adapted to measure the volume of at least one of the first and second chambers, a hydraulic inlet control valve and a hydraulic outlet control valve coupled to the first chamber, a mud suction valve and a mud discharge valve coupled to the second chamber. The first chamber is hydraulically coupled to receive and discharge a hydraulic fluid, and the second chamber is hydraulically coupled to receive and discharge a drilling fluid. The separating member is adapted to move within its the pressure vessel in response to a pressure differential between the first and second chambers. The pump system also includes a hydraulic control unit adapted to control the plurality of pump units.

A drive control system for an automotive vehicle includes an engine, an automatic transmission, a torque converter, a start clutch, an oil pump, a hydraulic pressure control unit, an engine control unit, an automatic engine stop/restart control unit and a torque transmission control unit configured to calculate target start clutch engagement time and torque based on an accelerator opening of the vehicle, calculate a target engine torque based on the target clutch engagement torque and cause the hydraulic control unit and the engine control unit to control the engagement state of the start clutch and the output torque of the engine according to the target clutch engagement time and torque and the target engine torque at a restart of the engine.

The invention provides a vehicle brake energy regeneration control method and system; the system comprises a hydraulic energy accumulator, a variable pump/motor, an electromagnetic clutch, a brake pedal switch, an acceleration pedal switch, a gear switch, a road slope sensor, a speed sensor, a pressure sensor of the energy accumulator, a hydraulic control unit and an electric control unit; the system automatically identifies the acceleration or brake intention of a driver, automatically detects the running state of the vehicle and the road slope situation, calculates the control current I1 of the proportional electric magnet of the variable pump/motor on different downgrade road slopes or horizontal roads and at different speeds by adopting the formula (I), calculates the control current I2 of the proportional electric magnet of the variable pump/motor on different upgrade road slopes or horizontal roads and at different speeds by adopting the formula (II) and carries out brake energy releasing circulation control, so as to control the running stability of the vehicle and improve the recovery rate as well as the regeneration rate of the brake energy.

The invention provides an intelligent photovoltaic array washing car used for washing photovoltaic arrays of a large-scale ground photovoltaic power station. A washing head supporting and locating unit and a power unit are arranged on the head portion and the tail portion of a crawler base respectively, a water storage unit is arranged adjacent to the power unit, and a washing head unit is provided with range finder sensors used for measuring the distance between the washing head unit and solar cell panels; the washing head supporting and locating unit comprises a movable base capable of rotating and transversely moving and a working arm set provided with a main arm and an end arm, wherein the main arm and the end arm can pitch respectively; a water pump of a water supply unit is driven by a hydraulic motor; a computer is used as a control kernel of a main control module of an operation control unit; a pair of proportional directional valves of the hydraulic control unit controls two base crawler traveling motors, and other directional valves are electromagnetic directional valves controlled by the main control module. According to the intelligent photovoltaic array washing car, the position and the posture of the washing head unit relative to photovoltaic array panels and the position and the posture of a car body relative to the photovoltaic arrays can be automatically controlled, and the intelligent photovoltaic array washing car is intelligent, efficient, flexible in operation, high in adaptability, easy and convenient to operate, concise in structure and good in washing effect.

The present disclosure belongs to the field of marine engineering, and in particular relates to a method and system for guaranteeing the safety of offshore oil well control equipment. The method comprises: identifying the state of a main structure of the offshore oil well control equipment, identifying the state of a hydraulic control unit of offshore oil well control equipment, identifying the state of an electronic control unit of offshore oil well control equipment, predicting the state of the offshore oil well control equipment and making a real-time decision based on existing information; and the system for guaranteeing the safety of the offshore oil well control equipment comprises a state identification subsystem of a main structure, a state identification subsystem of the hydraulic control unit, a state identification subsystem of the electronic control unit and a state prediction and real-time decision subsystem.

The invention discloses a hydraulic excavating energy saving system. The hydraulic excavating energy saving system comprises a movable arm driving oil cylinder, a loading mechanism, an oil-electricity-liquid hybrid driving system, a hydraulic accumulator control unit, a hydraulic control unit of the movable arm driving oil cylinder, a hydraulic control unit of the loading mechanism, a first one-way valve, a second one-way valve, a third one-way valve, a first hydraulic accumulator and a second hydraulic accumulator. The hydraulic excavating energy saving system combines the advantages of an oil-electricity hybrid power system and a hydraulic hybrid power system in the aspect of a power system, can meet the requirements of load on high power density and high energy density at the same time, and conforms to a principle of minimizing an energy transformation link in the aspect of energy recovery and recycle; and the hydraulic accumulators and a storage battery are shared by a power system and an energy recovering system. Therefore, the working efficiency of an engine can be improved, the energy consumption and loss of the energy recovery system can be reduced, and the work stability of the engine cannot be influenced.

A closed hydraulic control system with frequency-varying volumetric speed regulation for high-power and high-speed fields is composed of primary hydraulic loop and oil-supplementing loop for said primary hydraulic loop. A frequency-varying technique is used to control the rotation speed of three-phase AC asynchronous motor and in-turn the output flow of hydraulic pump or hydraulic motor. Its advantages are small volume of oil in hydraulic loop, and high energy-saving effect.

The invention relates to an electric-hydro complex brake system employing an integral brake master cylinder assembly for vehicle, including: a brake pedal, a pedal displacement sensor, an integral brake master cylinder assembly and an ABS hydraulic control unit, which are in turn connected. The ABS hydraulic control unit is connected with brake wheel cylinders of four wheels of the vehicle. Compared with the prior art, in a state that the electric system of the vehicle does not work, the hydraulic pressure inside the integral brake master cylinder assembly assists a first chamber to amplify the input force of the push rod of the master cylinder, and a pedal simulation spring drives and assists a second piston, a first piston for the master cylinder and a second piston for the master cylinder, in order to form the pressure required by braking.

The invention relates to a brake-by-wire system of an automobile and belongs to the technical field of automobile brake systems. In the brake system, a vacuum booster of the traditional vacuum booster hydraulic brake system is replaced with a motor, and a piston in a brake main cylinder is pushed to move to generate brake hydraulic pressure, so that dependence on vacuum degree of an engine is canceled; through the adoption of a pedal simulator, influences on feelings of a brake pedal during coordinated control of feedback and brake are eliminated; a hydraulic control unit of the traditional brake system is kept to implement hydraulic adjustment; and as a standby hydraulic brake system is integrated, braking with certain strength can be implemented by a driver under a situation that the power supply of the system is ineffective. Compared with the traditional distributed brake-by-wire scheme, the brake-by-wire system provided by the invention has the advantages as follows: the structure is changed when compared with the structure of the traditional vacuum booster hydraulic brake system, the system can be mounted on the automobile more conveniently, and more existing technologies in the traditional brake system can be succeeded in the control aspect.

The invention discloses an electric energy assisted braking system with a complete decoupling function between the fraction braking and the regenerative braking. When braking energy of a new energy vehicle is recycled, the friction braking force and the regenerative braking force can be decoupled completely, the energy can be recovered to the maximum extent, and electric braking power-assisted function and active braking function are possessed. The electric energy assisted braking system comprises a brake pedal, a push rod, an electric power-assisted assembly, an electromagnet connector, a master cylinder push rod, a master cylinder, a fluid reservoir, a hydraulic control unit, sensors and a motor; the brake pedal is connected with the push rod through a rest pin, the master cylinder and the hydraulic control unit are communicated through braking lines, and the motor, the hydraulic control unit and the sensors are all connected with an electronic control unit in a vehicle; the electromagnet connector is arranged between the electric power-assisted assembly and the master cylinder, and the front end of the electromagnet connector is connected with the master cylinder push rod in a contacting mode; a rack of the electric power-assisted assembly is connected with the push rod is a contacting mode, a pressure rod is coaxially arranged with the master cylinder push rod, a gap is reserved between the pressure rod and the master cylinder push rod, and the pressure rod and the master cylinder are connected through a worm.

A motor vehicle has an inclinometer to determine the steepness of the slope upon which the vehicle stands, brakes and a driver brake pedal for generating a braking effort in the brakes. The brakes are also controlled by a brake hydraulic control unit and an electronic control unit. The brake hydraulic control unit is arranged to control the release of the braking effort generated to stop the vehicle on a slope by the brake pedal at a release rate which varies as a function of the steepness of the slope determined by the inclinometer following operation of the brake pedal to release the brakes. The vehicle thus achieves controlled descent of a hill after a stationary position. Such a brake control system is particularly advantageous to a motor vehicle having a hill descent mode.

A variable valve timing control apparatus for an engine includes a variable valve timing unit, a lock pin, a hydraulic control unit, and a lock control unit. The lock control unit causes the lock pin to lock the camshaft phase at an intermediate lock phase when a lock request is issued. When the lock request is issued, the camshaft phase is shifted in a reference direction to go beyond the intermediate lock phase while the lock pin is urged in a lock direction. When the camshaft phase stops around the intermediate lock phase, the lock control unit changes a control amount of the hydraulic control unit by a certain amount to shift the camshaft phase. The lock control unit determines that the camshaft phase has been locked at the intermediate lock phase when the camshaft phase is not shifted even after the lock control unit changes the control amount.

The invention discloses a dual-motor BBW system with multiple working modes and voltage regulation modes. A brake fluid in a manual cylinder flows into two main cylinders by means of a brake pedal, and brake pressure is generated; and meanwhile, output power torque of two motors is controlled, and axial thrust is overlaid to pistons of the two main cylinders through a transmission device, so that electric power brake is realized. Through control of output torque of the two motors, pressure of the two main cylinders is transmitted to wheel cylinders, brake by wire is realized, and a pedal travel simulator is used for providing force for the brake pedal. Under the condition that the brake pedal is not stepped, the output torque of the two motors is controlled, so that the two cylinders generate pressure which is transmitted to the wheel cylinders through a hydraulic control unit, and accordingly, the active brake is realized. The invention further discloses a structure of a hydraulic control system, and the structure has multiple voltage regulation modes. The dual-motor BBW system has the advantages as follows: the system has multiple braking modes and voltage regulation modes, the most appropriate braking mode and voltage regulation mode can be selected according to dynamic properties of the motors during implementation and application, the reliability is high, and the failure protection capacity is high.

The electric brake system for vehicles includes a pressure supplier connected to a reservoir through a hydraulic passage to receive the oil, the pressure supplier outputting a brake will of a driver as an electric signal through the pedal displacement sensor, when the driver puts the brake pedal, to operate a motor and convert a rotational force of the motor into linear motion, a hydraulic control unit including a first circuit including at least one first vehicle wheel and a second circuit including at least one second vehicle wheel to receive a hydraulic pressure with a force generated by the pressure supplier and thereby perform braking, a blocking valve to control the hydraulic pressure from the master cylinder to a wheel cylinder disposed in each vehicle wheel, a simulation device connected to the master cylinder, to provide a reaction force response to the pedal effort of the brake pedal, and an electronic control unit to control the motor and the valves, based on pressure information and pedal displacement information.

The invention discloses a sensation simulator of an automobile brake pedal. The rod-free cavity of a main braking cylinder is provided with a piston return spring and is respectively communicated with an oil storage cup and the input end of a two-position three-way solenoid valve; the brake pedal is respectively connected with the push rod of the main cylinder braking piston and a pedal travel sensor; and two output ends of the two-position three-way solenoid valve are respectively connected with a hydraulic control unit (HCU) and a simulator valve block. According to the sensation simulator,the braking sensation of a driver can be accurately obtained, and the pedal feeling of the driver can be fed back. The traditional hydraulic braking system is improved slightly, and the sensation simulator is installed on the main braking cylinder or is integrated with the HCU. The sensation simulator has the advantages of small volume, low cost and small difficulty. Under the condition that a motor-driven hydraulic braking system fails, the traditional hydraulic braking system can be subjected to emergent braking. The sensation simulator of an automobile brake pedal and the HCU guarantee good braking feeling under the coordination control of an electronic control unit (ECU).

A control system for a subsea blowout preventer (BOP) positioned in a lower stack, the lower stack releasably engaged with a lower marine riser package (LMRP). The control system includes a surface logic solver positioned at or adjacent the surface of the sea that generates commands for operating the subsea BOP, a first subsea logic solver attached to the LMRP and in communication with the surface logic solver so that the first subsea logic solver receives the commands from the surface logic solver, and a second subsea logic solver attached to a hydraulic control unit in the lower stack. The second subsea logic solver is in hydraulic communication with the subsea BOP, and the first subsea logic solver so that the second subsea logic solver receives the commands from the first subsea logic solver and implements the commands by activating the hydraulic control unit to operate the BOP.

The invention relates to a hydraulic control unit performance test station for a stability control system in vehicle dynamics and belongs to the technical field of automobile manufacturing. The test station comprises a flat workbench, an HCU fast limiting and oil circuit sealing platform which is arranged on the workbench, a controller, a sealing feeding differential hydraulic cylinder, a hydraulic test system, a vehicle braking system, and a pressure source; the controller is respectively connencted with the HCU fast limiting and oil circuit sealing platform, the differential hydraulic cylinder and the hydraulic test system by a circuit; the differential hydraulic cylinder contacts the HCU fast limiting and oil circuit sealing platform; the hydraulic test system is connencted with the HCU fast limiting and oil circuit sealing platform by a test oil circuit; the vehicle braking system is connencted with the HCU fast limiting and oil circuit sealing platform by a braking fluid interface pipeline; and the hydraulic test system and the oil circuit sealing differential hydraulic cylinder are connencted with the pressure source by a hydraulic pipeline. The invention meets the delivery inspection needs of HCU, has easy and quick operation, and achieves low cost.

A vehicle control apparatus includes: an automatic-stop-and-restart-control-unit stopping/restarting an engine, a brake-fluid-pressure-control-unit controlling wheel-cylinder-pressure using a brake-system, which intensifies brake-manipulation-force by a brake-booster to cause master-cylinder-pressure in a master-cylinder while the engine operates, and which transfers the master-cylinder-pressure to wheel-cylinders to cause the wheel-cylinder-pressure, the brake-system including an actuator automatically increasing pressure in the wheel-cylinders irrespective of the brake-manipulation-force; a negative-pressure-detection-unit which detects the vacuum-pressure; a first-determination-unit which determines whether the vacuum-pressure is not more than a first threshold while the engine stops, a restarting-unit which allows the automatic-stop-and-restart-control-unit to restart the engine when the first-determination-unit determines that the vacuum-pressure is not more than the first threshold; a second-determination-unit which determines whether the vacuum-pressure is not more than a second threshold; and a braking-boost-unit which allows the brake-fluid-pressure-control-unit to automatically increase the pressure in the wheel-cylinders when the second-determination-unit determines that the vacuum-pressure is not more than the second threshold.

The invention discloses a hydraulic device for automobile braking energy recovery. The hydraulic device aims at solving the problems that in the prior art, the structure is complex, cost is high, and the foreign technology is depended. The hydraulic device for automobile braking energy recovery comprises a main cylinder vacuum booster assembly, a braking energy recovery hydraulic control unit, an ABS hydraulic control unit and an electronic control device. The main cylinder vacuum booster assembly comprises a braking pedal, an oil pot (5) and a braking main cylinder. An opening N of the braking main cylinder is connected with a pipe of an opening p of a left back wheel oil inlet electromagnetic valve of the ABS hydraulic control unit, an opening p of a normally-open electromagnetic valve of the braking energy recovery hydraulic control unit is connected with an opening M of the braking main cylinder through a pipe, an opening a of the normally-open electromagnetic valve and an opening p of a normally-closed linear electromagnetic valve are connected with an opening p of a right front liquid inlet electromagnetic valve of the ABS hydraulic control unit through a pipe, an opening a of the normally-closed linear electromagnetic valve is connected with the oil pot (5) through a pipe, and the electronic control device and the braking energy recovery hydraulic control unit are connected with the ABS hydraulic control unit through pipes.

A vehicle brake system includes a brake pedal unit coupled to a vehicle brake pedal. The system includes an input piston connected to operate a pedal simulator during a normal braking mode, and coupled to actuate a pair of output pistons during a manual push through mode. The output pistons are operable to generate brake actuating pressure at first and second outputs of the brake pedal unit. A hydraulic pressure source supplies fluid at a controlled boost pressure. A hydraulic control unit is adapted to be hydraulically connected to the brake pedal unit and the hydraulic pressure source. The hydraulic control unit includes a slip control valve arrangement, and a switching base brake valve arrangement for switching the brake system between the normal braking mode wherein boost pressure from the pressure source is supplied to first and second vehicle brakes, and the manual push through mode wherein brake actuating pressure from the brake pedal unit is supplied to the first and second vehicle brakes. The input piston cooperates with a seal mounted in the brake pedal unit to provide for a progressive rate of friction therebetween as the input piston is advanced in the brake pedal unit by the brake pedal.

The invention relates to a system for testing the comprehensive performance of beam column nodes of a goods shelf, and the system comprises two rack upright columns, a top beam, a mechanical body unit, a hydraulic control unit, and a data processing and analyzing unit, wherein the mechanical body unit is mainly formed by four parts, namely a beam-column combination member mounting device, a hydraulic cylinder mounting and moving device connected with the hydraulic control unit, a crossbeam clamping device and a sidewise restraining fixture; the beam-column combination member mounting device is a vertical worktable provided with a flexible upright column clamping mechanism; the flexible upright column clamping mechanism is fixedly provided with an upright column; the hydraulic cylinder mounting and moving device is mounted at the inner part of the top beam; the lower part of a hydraulic cylinder is connected with a connecting rod; the bottom end of the connecting rod is hinged with a cross beam vertically-clamping device; the upper end surface and the lower end surface in the cross beam vertically-clamping device, which are close to a cross beam, are respectively provided with a pressure sensor; and one end of the cross beam is connected with the upright column, and the other end of the cross beam is mounted on the sidewise restraining fixture. By adopting the system, comprehensiveness, flexibility, error compensation and quantitative analysis can be realized on the nodes of the goods shelf.

The invention relates to a wire control brake system driven by two fully decoupled motors. The wire control brake system comprises a brake main cylinder, a hydraulic control unit and a hydraulic force increasing mechanism. The main cylinder is connected with the hydraulic control unit through brake pipelines. The hydraulic force increasing mechanism comprises a force increasing chamber shell body, a pedal push rod and a main cylinder piston push rod. The force increasing chamber shell body is internally provided with a piston cylinder. The back end of the pedal push rod is rotationally connected with a brake pedal. The front end of the pedal push rod is provided with a first force increasing chamber piston. The back end of the main cylinder piston push rod is provided with a second force increasing chamber piston. The first force increasing chamber piston and the second force increasing chamber piston are both slidably arranged in the piston cylinder. A first force increasing chamber piston cavity is formed between the first force increasing chamber piston and the second force increasing chamber piston. A second force increasing chamber piston cavity is formed between the second force increasing chamber piston and the sealed end of the piston cylinder. The front end of the main cylinder piston push rod extends into the brake main cylinder.