10 results about "Hydraulic clearance" patented technology

The hydraulic lash adjuster comprises a shell assembly and a plunger, the shell assembly is provided with an exhaust part, an oil supply chamber is arranged in the plunger, and the plunger is movably connected to the interior of the shell assembly and matched with the shell assembly to form a high-pressure chamber and a leakage gap communicated with the high-pressure chamber. The leakage gap and the exhaust part are independently arranged, the exhaust part can block oil in the high-pressure chamber and exhaust gas in the oil out of the shell assembly towards the side deviating from the high-pressure chamber, and meanwhile the invention further discloses an engine applying the hydraulic gap adjuster and a vehicle applying the engine. The technical problem that the working reliability is insufficient due to the fact that gas separated out of oil in a high-pressure chamber in an existing hydraulic lash adjuster is accumulated and cannot be discharged in time is solved.

The invention discloses a power head middle hydraulic rapid clamping tool changing device which comprises a power head and a tool turret, the power head comprises a tool bit and a main shaft, and the main shaft is sleeved with a piston, a circular ring piece, an outer ring step piece, an inner ring step piece and a disc piece; one end, close to the tool turret, of the piston is arranged opposite to the circular ring piece to form a first hydraulic gap, and the other end of the piston forms a second hydraulic gap; the piston is sleeved with the circular ring piece, and the circular ring piece abuts against the position between the piston and the tool turret. The main shaft is sleeved with the inner ring step part and the disc part together, the inner ring step part is fixedly connected with the rear end of the piston, and the inner ring step part is sleeved with the outer ring step part and fixedly connected with the disc part; a movable rod, an elastic element and a connecting column are arranged in the main shaft, the movable rod is sleeved with the elastic element, the top end of the elastic element abuts against a limiting structure in the main shaft, the bottom end of the elastic element abuts against a boss on the movable rod, and the bottom end of the movable rod abuts against the inner bottom face of the main shaft in the natural state.

A gap regulator can include a hydraulic gap assembly, a mechanical gap assembly, and a check assembly. The hydraulic gap assembly can include a body, a top plunger, a leak plunger, and the check assembly between the body and the leak plunger. The mechanical gap assembly can be between the top plunger and the leak plunger. The mechanical gap assembly can include a shim abutting the top plunger, a spacer, and a spring pressing against the spacer and the shim to create a void between the top plunger and the leak plunger. The gap regulator can include the spring directly pressing against the spacer and directly or indirectly pressing against the shim.

The invention relates to the technical field of metal rubber composite damping parts, in particular to a plate spring support with a hydraulic structure, which comprises an upper mounting plate, a lower mounting plate, a rubber body and a plurality of layers of partition plates vulcanized in the rubber body, and the upper mounting plate, the lower mounting plate, the plurality of layers of partition plates and the rubber body are vulcanized to form an integral structure. The rubber body and the partition plate are provided with hollow hydraulic areas, the hollow hydraulic areas are communicated and form a hydraulic cavity, the upper mounting plate and / or the lower mounting plate are / is connected with a filling block, the filling block is contained in the hydraulic cavity, the height of the hydraulic cavity does not exceed the overall height of the elastic body, and hydraulic gaps are reserved between the circumferential direction of the filling block and the cavity wall of the hydraulic cavity. A flow channel groove communicated with the hydraulic cavity is formed in the partition plate connected with the hydraulic cavity. According to the plate spring support, product deformation can be reduced, the service life of a product is prolonged, and the use performance of the product is improved.

The embodiment of the invention provides an exhaust method and device for a hydraulic lash adjuster in a vehicle, electronic equipment and the vehicle. The method comprises the steps that the oil level height of engine oil stored in an oil pan in the vehicle is determined; in response to the situation that the oil level height is lower than the height threshold value, the space inclination angle of the vehicle and the maximum inclination angle threshold value allowed by an engine in the vehicle at the current rotating speed are determined, and the space inclination angle is used for representing the inclination state of a vehicle body of the vehicle relative to the engine; obtaining the speed of the vehicle in response to the situation that the space inclination angle is smaller than or equal to the maximum inclination angle threshold; adjusting the rotating speed of the engine based on the vehicle speed and the current rotating speed; and controlling a hydraulic lash adjuster in the engine to exhaust internal gas by utilizing the adjusted rotating speed. The technical problem that the performance of the pressure gap adjuster is reduced is solved.

This invention relates to the field of internal combustion engine technology and discloses a valve train control method, control system, and valve train device. The valve train control method includes acquiring the engine speed, determining that the engine is in an overspeed state based on the engine speed, preferentially cutting off the oil supply passage of the hydraulic clearance adjustment mechanism, and controlling the brake rocker arm to be in an active state, thus enabling in-cylinder braking. Throughout the overspeed braking condition, the hydraulic clearance adjustment mechanism remains in a non-supply state. Even if the exhaust valve clearance increases due to valve bridge tilt, it will not continuously fill with oil and extend, thereby avoiding overfilling that could cause the exhaust valve to fail to reliably seat, improving sealing reliability and engine operating stability during the transition between braking and normal operating conditions.

An added-motion engine braking system selectively operable in an engine braking mode and a drive mode and compatible with providing hydraulic lash adjustment includes an exhaust rocker arm assembly, a main exhaust valve and a brake valve, a valve bridge configured to selectively act on the main exhaust valve and the brake valve and constrained to move parallel to a valve opening direction, a hydraulic lash adjuster disposed on the exhaust rocker arm assembly and configured to automatically compensate for lash between the exhaust rocker arm assembly and the valve bridge; and an engine braking rocker arm assembly configured to selectively act on the brake valve in the engine brake mode, wherein, in a base circle position with the main exhaust valve and the brake valve closed, the valve bridge is configured to preferentially contact the main exhaust valve compared to the brake valve.

The invention discloses a rocker arm, a valve mechanism and an engine. The rocker arm comprises a rocker arm body, a brake part, a hydraulic gap adjusting device and a control slide valve. A first hydraulic channel, a second hydraulic channel and a mounting cavity are defined by the rocker arm body, and the first hydraulic channel and the second hydraulic channel both communicate with the mounting cavity. The brake component is movably arranged on the rocker arm main body and is connected with the first hydraulic channel; the hydraulic gap adjusting device is arranged on the rocker arm body and connected with the second hydraulic channel. The control slide valve is movably arranged in the mounting cavity and is provided with a first position and a second position relative to the mounting cavity, the control slide valve at the first position is communicated with the first hydraulic channel and disconnects the second hydraulic channel, and the control slide valve at the second position is communicated with the second hydraulic channel and disconnects the first hydraulic channel. According to the rocker arm, excessive adjustment of the hydraulic gap adjusting mechanism can be avoided under the abnormal control condition.

This application provides a hydraulic clearance adjuster, an engine, and a vehicle. The hydraulic clearance adjuster includes: a housing; at least a portion of a plunger disposed within a first receiving cavity, with an oil drain channel formed between the outer peripheral surface of at least a portion of the plunger and the side wall of the first receiving cavity, and a first working cavity formed between the bottom of the plunger and the bottom of the first receiving cavity, the plunger being movably disposed relative to the housing to change the volume of the first working cavity; a first annular gap formed between the inner ring of a seal and the outer peripheral surface of the plunger, the first annular gap communicating with the first working cavity; a second annular gap formed between the outer ring of the seal and the inner side wall of the housing, the second annular gap communicating with the oil drain channels located on both sides of the seal; and a communicating channel formed on at least one of the seal and the housing, the communicating channel communicating with the oil drain channels located on both sides of the seal. The hydraulic clearance adjuster dynamically adjusts the flow cross-section of the oil drain channel according to the oil pressure, thereby precisely controlling the hydraulic stiffness damping.

The valve actuation system comprises a first rocker assembly operably connected to a first valve actuation motion source and a first engine valve, with a first lost-motion component arranged in series between a first input rocker and a first output rocker. A second rocker assembly is operably connected to a second valve actuation motion source and a second engine valve, with a second lost-motion component arranged in series between a second input rocker and a second output rocker. A one-way coupling mechanism is configured to transmit the second valve actuation motion to the first output rocker, but to prevent the first valve actuation motion from being transmitted to the second output rocker. Furthermore, a primary hydraulic lash adjuster is configured within the second rocker assembly to act on the first output rocker via the one-way coupling mechanism.