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328results about "Lubrication temperature control" patented technology

Engine oil temperature control lubricating system for hybrid electric vehicle

The invention discloses an engine oil temperature control lubricating system for a hybrid electric vehicle, and belongs to the field of engine lubricating systems. Comprising a main oil duct, an engine oil pan, an engine oil pump and an oil duct pipe set, the engine oil pan is used for storing engine oil, the engine oil pump is used for pumping the engine oil in the engine oil pan, and the oil duct pipe set communicates with the engine oil pump and the main oil duct and comprises a first oil duct and a second oil duct which are arranged in parallel; the heater is opened to heat engine oil flowing through the first oil duct when the engine oil temperature is lower than a second preset temperature, and is closed when the engine oil temperature is higher than or equal to the second preset temperature; and the second oil duct comprises a second temperature control valve, and the second temperature control valve is opened when the temperature of the engine oil is larger than or equal to the second preset temperature, so that the engine oil further flows into the main oil duct through the second oil duct. When the engine of the hybrid electric vehicle is in cold start, the temperature of the engine oil can be rapidly increased through the heating piece, so that abnormal sound and abrasion of the engine when the temperature of the engine oil is too low can be well improved.
Owner:CHINA FAW CO LTD

Control system and method of electronic oil pump

The invention discloses a control system and method for an electronic oil pump, and relates to the technical field of electronic oil pump control. The system comprises a database, a positioning module, a damping regulation and control module, a double-tube coordination module and an oscillation monitoring module, through the synergistic effect, cross unstable intervals are recognized and avoided, damping and flow path switching are dynamically adjusted, and real-time monitoring and graded early warning are conducted, so that when the electronic oil pump is in the low-flow working condition or the engine pre-lubrication boundary state, the flow path switching is dynamically adjusted; the problems of pressure oscillation, discontinuous oil film thickness, unsmooth hydraulic execution and the like caused by impedance matching imbalance between a pump characteristic curve and a pipeline can be effectively avoided; therefore, the technical problem that in the prior art, an electronic oil pump is prone to oscillation under the boundary working condition is thoroughly solved, and the stability and reliability of the system are greatly improved.
Owner:DAFENG HAINA MACHINERY

Engine Oil Cooling Structure of an Engine

The present disclosure provides an engine oil cooling structure of an engine. In the engine oil cooling structure of an engine, the engine includes a crankcase, the crankcase is provided with an oil filter mounting chamber having a cylindrical shape, the cooling structure includes a water channel, a water inlet of the water channel communicates with a water pump, the crankcase is further provided with a main oil channel, the crankcase is further provided with a heat conducting thin wall, an inner cavity of the heat conducting thin wall form the oil filter mounting chamber, the oil filter mounting chamber communicates with the main oil channel, the water channel is arranged around an outer side wall of the heat conducting thin wall, and a water outlet of the water channel communicates with a cooling water channel arranged in the same direction as and adjacent to the main oil channel.
Owner:ZHEJIANG QIANJIANG MOTORCYCLE

A system and method for handling virtual development bench hardware-in-the-loop heat dissipation

The application discloses a system and method for processing virtual development bench hardware-in-the-loop heat dissipation, and is used for improving a hardware-in-the-loop running environment. The system comprises a flat plate heat exchange module, a fan module, an oil inlet pipeline, a fan control module, a hardware-in-the-loop cabinet, an oil outlet pipeline, an oil quantity measurement unit, an oil sprayer, a cooling oil tank, a temperature sensor, a cooling tank connecting pipeline and an oil circulation pump. The flat plate heat exchange module is connected with the oil inlet pipeline, the cooling tank connecting pipeline, the cooling oil tank and the oil outlet pipeline in sequence. The flat plate heat exchange module is provided with the fan module on one side, the fan module is connected with the fan control module, the hardware-in-the-loop cabinet is connected with the fan control module, the temperature sensor and the oil circulation pump, the temperature sensor is arranged on the cooling tank connecting pipeline and the sensing head of the temperature sensor is immersed in the oil medium, the oil circulation pump is installed at the connecting port of the cooling tank connecting pipeline and the oil inlet pipeline, and the oil quantity measurement unit and the oil sprayer are both installed on the cooling oil tank and the heads of the oil quantity measurement unit and the oil sprayer are both immersed in the oil medium to a preset depth.
Owner:GUANGXI YUCHAI MASCH CO LTD

Engine lubrication control method, engine and vehicle

The invention provides an engine lubrication control method, an engine and a vehicle, and relates to the technical field of engines, and the control method comprises the steps that the accumulated stop time length of the engine is obtained, and whether the accumulated stop time length of the engine exceeds the preset time length or not is judged; in response to the fact that the accumulated shutdown duration of the engine exceeds the preset duration and the engine has a starting requirement, the engine is started, and the engine is pre-lubricated when the engine is in a starting state and is in a power disconnection state with a transmission device; according to the control method, the engine can be pre-lubricated at a low speed, and friction damage to the engine is avoided.
Owner:GREAT WALL MOTOR CO LTD

CONTROL OF THE COOLING OF THE LUBRICATING OIL OF AN ELECTRIC VEHICLE'S DRIVEMACHINE

A control device (DC) equips a vehicle (V) comprising an electric drive machine (MME) supplied with lubricating oil by a first circuit (C1) connected to a lubricating oil / heat transfer fluid exchanger (EC), and an inverter (OM) electrically supplying the drive machine (MME) and cooled by the heat transfer fluid before it reaches the exchanger (EC) via an intermediate part (PI1) of a second circuit (C2). This device (DC) includes a valve (VC) comprising an inlet (EV) and a first outlet (SV1) connected to two sub-parts (SP1, SP2) of this intermediate part (PI), and a second outlet (SV2) connected to a bypass conduit (CC) connected to the second circuit (C2) downstream of the heat exchanger (EC). The heat transfer fluid is diverted to the first (SV1) or second (SV2) outlet when a first representative value of the lubricating oil temperature is above or below a chosen threshold. Figure 1
Owner:STELLANTIS AUTO SAS

Automobile engine oil cooler shell structure capable of preventing oil leakage

The utility model discloses an automobile engine oil cooler shell structure capable of preventing oil leakage, which relates to the technical field of engine oil cooler shells and comprises an engine oil cooler shell, and one side of the top of the engine oil cooler shell is fixedly connected with an oil inlet pipe. By arranging the limiting assembly, the first fixing plate can be pressed downwards, the first fixing plate can drive the movable block to slide in the supporting sleeve through the movable rod, and when the movable block makes contact with the limiting block, the limiting rod can be pushed, so that the limiting rod is inserted into a limiting groove formed in the side face of the supporting sleeve; the first fixing plate limits and fixes the position of the threaded sleeve, and the phenomena that vibration generated when an automobile engine works easily enables the threaded sleeve to loosen, the sealing performance of the threaded sleeve is reduced, and oil leakage happens to the connecting position of the engine oil cooler and the automobile engine oil connecting pipe for a long time are avoided; therefore, convenience is brought to the use of the automobile engine oil cooler.
Owner:YANGZHOU SHUANGYING IND TECHNOLOGY CO LTD

Motorcycle engine oil cooler water pipe limiting structure

The utility model discloses a limiting structure for a water pipe of an oil cooler of a motorcycle engine, and aims to solve the problem that in the prior art, the water pipe of the oil cooler is fixed through a wire clamp, and the wire clamp is easy to age and fall off after being used for a long time. According to the technical scheme, the crankcase fixing structure comprises a crankcase, a fixing structure is arranged on the crankcase and comprises a fixing rod, one end of the fixing rod is fixedly connected with the crankcase, and the other end of the fixing rod is connected with an engine hanging point; the fixing rod and the crankcase are matched to form a fixing hole, and the oil cooler water pipe is arranged in the fixing hole in a penetrating mode. The fixing structure is matched with one engine hanging point to form the fixing hole, the oil cooler water pipe penetrates through the fixing hole, and the oil cooler water pipe is fixed through the fixing hole, so that the trouble of fixing the oil cooler water pipe through a wire clamp is omitted, and the overall structure can be more compact.
Owner:ZHEJIANG QIANJIANG MOTORCYCLE

Oil cooler and oil cooling system

The utility model discloses an oil cooler and an oil cooling system, and relates to the technical field of oil cooling, a water cooling cavity, a first water inlet and a first water outlet are formed in the oil cooler, and the water cooling cavity is communicated with the first water inlet and the first water outlet; the oil cooler further comprises a first layer plate, the first layer plate and the outer wall of the water cooling cavity are arranged in a spaced mode, a gap is formed between the first layer plate and the outer wall of the water cooling cavity, and the gap communicates with the outside to form an oil cooling channel. The oil cooling channel is communicated with the outside, the oil cooler can be directly installed in an oil pan or other parts, oil flows into or out of the oil cooler through the gap and does not need to flow through an oil inlet pipe and an oil outlet pipe, the flowing resistance is small, the influence of the oil inlet pipe and the oil outlet pipe on the flowing efficiency of the oil is reduced, and the cooling efficiency of the oil cooler is improved.
Owner:SUZHOU INOSA UNITED POWER SYST CO LTD

Oil temperature control system for electric vehicle

An embodiment oil temperature control system for an electric vehicle includes a heat exchange unit that performs heat exchange between an oil for cooling a driving motor and a coolant, a temperature sensor including an oil temperature sensor or an outside air temperature sensor, a controller that receives a signal from the temperature sensor to determine whether a heat generation mode entry condition to cause a power electronic part to generate heat is satisfied and operates the power electronic part in a heat generation mode when the heat generation mode entry condition is satisfied, and a cooling system that allows the coolant used to cool the power electronic part operating in the heat generation mode to circulate through a passage penetrating the heat exchange unit so that the coolant exchanges heat with the oil in the heat exchange unit.
Owner:HYUNDAI MOTOR CO LTD +1

Temperature control system for lubricating oil tank and lubricating oil tank

The invention provides a temperature control system for a lubricating oil tank and the lubricating oil tank, and relates to the technical field of temperature control of lubricating oil tanks of heavy diesel engineering vehicles. The spiral pipe is vertically fixed in the oil tank body, the bottom of the spiral pipe is close to the bottom of the oil tank body, and the top of the spiral pipe is close to the lubricating oil level in the oil tank body; the bottom end of the spiral pipe communicates with the circulating pump, a circulating oil outlet in the top end of the spiral pipe communicates with the cavity in the oil tank body, and a circulating oil inlet of the circulating pump communicates with the bottom of the cavity in the oil tank body. The electric heating elements comprise a high-power electric heating element, a medium-power electric heating element and a low-power electric heating element; the high-power electric heating element, the medium-power electric heating element and the low-power electric heating element are arranged on the spiral pipe at intervals from bottom to top; gradient heating can be achieved, the oil interlayer temperature difference is remarkably reduced, and local overheating is avoided.
Owner:BEIJING INST OF TECH

An engine oil cooler arrangement

The application discloses an engine oil cooler arrangement system, wherein an oil cooler is internally provided with a water channel and an oil channel, the front end of the oil cooler is provided with a water pump, a tension pulley and a thermostat seat mounting port, the thermostat seat mounting port is mounted with a thermostat seat, and an engine water inlet, a cylinder head water inlet and an oil inlet and outlet are arranged on the oil cooler in a mutually connected manner below the thermostat seat. The oil filter is arranged at a far end through a pipeline, so that the maintenance of the oil filter is facilitated; the water channel and the oil channel in the oil cooler are both extended and arranged, the flowing time of the oil in the oil cooler is prolonged under the premise of guaranteeing the fluidity of the oil, the heat exchange is uniform, and the heat of the oil is more beneficial to be taken away; the oil cooler integrates the water pump and the tension pulley, the oil filter is arranged at the far end, more operable space is provided for the outside of the engine body, and the integration and compactness are improved.
Owner:GUANGXI YUCHAI MASCH CO LTD

Engine pre-oiling system and method

The present application relates to a kind of engine pre-oiling system and method, including main oil tank and auxiliary oil tank, main oil tank is sequentially connected with main oil passage by pipeline by oil pump;Auxiliary oil tank is connected with the outlet of oil pump by corresponding pipeline with main oil passage respectively, and the pipeline connected with the outlet of oil pump is equipped with first pre-oiling pump, and the pipeline connected with main oil passage is equipped with second pre-oiling pump, and heating device is equipped on auxiliary oil tank.By increasing auxiliary oil tank and the pipeline and oil pump matched, the oil passage pressure fluctuation when engine is started first or normally is used to inject lubricating oil into auxiliary oil tank, so that when the viscosity of engine oil is increased in low temperature environment, the lubricating oil in auxiliary oil tank can be heated by heating device and sent into main oil passage, to avoid the problem of dry grinding, lubrication and damage caused by the influence of oil viscosity in bearing region.
Owner:WEICHAI POWER CO LTD

Cooling system for use in a vehicle

A cooling system is provided, comprising at least one unit to be cooled by a coolant, at least one pump arranged in a pump housing, a radiator connected to the unit to be cooled and to the at least one pump via corresponding coolant lines, and at least one coolant sump connected to the unit to be cooled, in which coolant is provided. The at least one pump is configured to draw coolant from the coolant sump and convey it via the radiator towards the unit to be cooled, or to convey it directly to the unit to be cooled, and wherein at least one bypass valve per pump is arranged in the pump housing such that coolant can be conveyed directly from the pump to the unit to be cooled.
Owner:ZF FRIEDRICHSHAFEN AG

Degassing device for engine oil cooler of high-horsepower engine

The utility model relates to the field of engine parts, in particular to a degassing device for an engine oil cooler of a high-horsepower engine, which comprises an engine oil cooler mounted on a cylinder body, a water pump is mounted at the engine oil cooler, and the cylinder body is provided with a water inlet and a water outlet. A water inlet and a water outlet are formed in the cylinder body, a water inlet pipe and a water outlet pipe are installed on the water inlet and the water outlet respectively, a water inlet header pipe is arranged on the cylinder cover, the cylinder body is communicated with the water inlet header pipe through a degassing pipeline, and a degassing connector is installed on the water inlet header pipe. If the water pump does not build the pressure and the pressure is insufficient, the boiling point of the cooling liquid is reduced, the cooling liquid is easy to boil, more bubbles are generated, vicious circle is formed, local high temperature is possibly caused, and engine parts are damaged.
Owner:Y & C ENGINE

Improved split type oil duct structure of engine oil filtering base and oil cooler connecting base in automobile

The utility model discloses a split type oil duct improved structure of an engine oil filtering base and an oil cooler connecting seat in an automobile, which comprises the engine oil filtering base, and an engine oil inlet, an engine oil outlet and an oil return port are arranged on the lower portion of the engine oil filtering base. An anti-freezing liquid inlet is formed in the end of the engine oil filtering base, a first water outlet and a second water outlet which are communicated with the anti-freezing liquid inlet are formed in the bottom of the engine oil filtering base, an engine oil cooler is installed on the upper portion of the end, away from the filter element, of the engine oil filtering base, and an oil cooler connecting base is arranged between the engine oil filtering base and the engine oil cooler. Two parallel circulating cooling runners are arranged on the surface, close to one side of the engine oil cooler, of the oil cooler connecting seat in parallel, and the two ends of the two parallel circulating cooling runners are circularly communicated with the engine oil filtering base and the engine oil cooler respectively; the device has the advantages that cooling and oil way connection are accelerated, and the risk of high-temperature failure occurring in the long-time running process of a vehicle is effectively reduced.
Owner:WENZHOU BONAI AUTO RADIATOR

An aero-engine cold start auxiliary staged preheating system and control method

ActiveCN117128118BImprove in-cylinder combustionSolve serious wear and tearInternal combustion piston enginesEngine startersThermodynamicsProcess engineering
The present application relates to a kind of aero-engine cold start auxiliary staged preheating system and control method, belong to aero-engine starting technical field;The present application is integrated preheating treatment to engine fuel, in-cylinder mixture thermodynamic state (in-cylinder thermal atmosphere before ignition) and lubricating oil by pipeline fuel preheating device, oil outlet preheating device, cylinder sleeve preheating device and lubricating oil heat preservation preheating device, coupling combustion parameter control strategy, according to the temperature gradient of plateau alpine low temperature environment, design four levels of plateau alpine cold start feedback control strategy, so that aviation kerosene pressure combustion engine provides and implements reasonable preheating scheme according to different low temperature low pressure environment outside in plateau alpine condition, can effectively solve the problem that aviation kerosene pressure combustion engine is difficult to cold start, starting time is long, engine parts wear seriously and cold start stability is poor and the like in plateau alpine environment.
Owner:KUNMING UNIV OF SCI & TECH

Oil cooler assembly for internal combustion engine and an internal combustion engine thereof

The present invention provides oil cooler assembly (100) for internal combustion engine (202) of two-wheeled vehicle (200). Assembly (100) includes oil cooler (102) having inlet port (104) and outlet port (106). Inlet pipe (108) having first end (108a) coupled to crankcase (204) of engine (202) and second end (108b) coupled to inlet port (104) of oil cooler (102) is provided. Inlet pipe (108) is adapted to supply lubricant to be cooled from crankcase (204) to oil cooler (102). Outlet pipe (110) having one end (110a) coupled to cylinder head (206) of engine (202) and other end (110b) coupled to outlet port (106) of oil cooler (102) is also provided. Outlet pipe (110) is adapted to supply cooled lubricant to cylinder head (206) from oil cooler (102). Such construction, reduces length of inlet and outlet pipe (108, 110), thereby compacting the size of the assembly (100).
Owner:TVS MOTOR CO LTD

Oil level measurement methods, devices, equipment and storage media

This application discloses a method, apparatus, device, and storage medium for measuring engine oil level. In the field of engine technology, the method for measuring engine oil level is disclosed. The method is applied to an engine oil level measuring unit, including an oil dipstick tube, an oil dipstick, an electronically controlled valve, a temperature sensor, and a temperature indicator light. The oil dipstick tube contains a first channel and a second channel forming a U-shaped tube structure. The electronically controlled valve is located in the first channel, the temperature sensor is located at the bottom of the first channel, and the temperature indicator light is located at the top of the dipstick tube. The method includes: when the engine is in a first stopped state, controlling the electronically controlled valve to open and close according to a preset method; when the opening and closing operation of the electronically controlled valve ends, adjusting the working state of the temperature indicator light according to the engine oil temperature; and when the temperature indicator light is illuminated, measuring the engine oil level according to the dipstick. This method ensures the accuracy and repeatability of the engine oil level measurement.
Owner:DONGFENG MOTOR GRP

Oil sump, engine, hybrid assembly, and vehicle

PCT designated stageWO2026066955A1Liquid coolingCasingsControl theoryCoolant channel
An oil sump, an engine, a hybrid assembly, and a vehicle. The oil sump is provided with a coolant channel; the oil sump is provided with a liquid outlet in communication with the coolant channel; and the liquid outlet is configured to be in communication with an engine body.
Owner:BYD CO LTD

Heat exchanger

The invention relates to a heat exchanger (1), more particularly an oil-air cooler, for heat exchange between a first fluid, more particularly hydraulic oil, and a second fluid, more particularly air, having: a number of first flow channels (2) for the passage of the first fluid, a number of second flow channels (3) for the passage of the second fluid, a distribution vessel (7) for splitting the first fluid onto first ends of the first flow channels (2), a collection vessel (8) for collecting the first fluid exiting the second ends of the first flow channels (2), an outlet (10), more particularly for a suction connection (10A), for discharging, more particularly suctioning, the first fluid from the collection vessel (8), a filter (11) with a filter element (12) for filtering the first fluid before entry into the outlet (10), wherein the filter (11) is arranged in the interior of the collection vessel (8) such that the first fluid is guided from outside through the filter element (12) into an interior (14) of the filter (11).
Owner:EULER ROLLE THOMAS

Vehicle control method, device, equipment and medium

The invention discloses a vehicle control method, device and equipment and a medium, and the method comprises the steps: responding to a power-on instruction of a hybrid vehicle, and obtaining the actual environment temperature of the environment where the hybrid vehicle is located; under the condition that the actual environment temperature is smaller than the preset environment temperature, whether the accumulative running duration of the hybrid vehicle and the accumulative running duration of an engine of the hybrid vehicle meet a first preset condition or not is judged, and / or whether the accumulative stop duration of the engine meets a second preset condition or not is judged; and under the condition that the first preset condition and / or the second preset condition are / is met and the actual vehicle speed of the hybrid vehicle is larger than 0, the engine is controlled to operate. Volatilization of water vapor and gasoline vapor in engine oil is accelerated, the water vapor and the gasoline vapor are introduced into the engine through the crankcase ventilation system to participate in combustion and discharged out of the engine, finally moisture and gasoline in the engine oil are reduced, the performance deterioration condition of the engine oil caused by chemical reaction of the moisture and the gasoline is relieved, and the service life of the engine oil is prolonged.
Owner:DONGFENG MOTOR GRP

Hydraulic-electric synergistic low-temperature starting device and intelligent control method

The invention provides a hydraulic-electric cooperative low-temperature starting device and an intelligent control method, and relates to the technical field of transmission systems, the hydraulic-electric cooperative low-temperature starting device comprises an electromechanical composite transmission system box body storing lubricating oil, a plurality of liquid heating plates, an electric heating plate, a driving motor and an oil pump motor; the electromechanical composite transmission system box body comprises a box body bottom cover plate and a box body shell; the electric heating plate is located in the electromechanical composite transmission system box body, the electric heating plate is a cover plate at the bottom of the box body, and the heating and temperature control functions are achieved through an integrated heating wire and a thermocouple; all the liquid heating plates are located on the outer side of the bottom of the electromechanical composite transmission system box body; the oil pump motor and the driving motor are both located in the electromechanical composite transmission system box body, the oil pump motor is located on the side wall of the box body shell, and the driving motor is located above the oil pump motor. By optimizing the position of the heating device and the control strategy, it is ensured that lubricating oil is rapidly heated to the temperature needed by starting in the low-temperature environment.
Owner:BEIJING INST OF TECH

An engine cooling system, control method, vehicle, and storage medium

The application relates to the technical field of vehicles, and particularly discloses an engine cooling system, a control method, a vehicle and a storage medium, the engine cooling system comprising a first cooling cycle and a second cooling cycle, the first cooling cycle comprising a first water pump, a first pipeline and a second pipeline which are arranged in parallel and are both connected with the output end of the first water pump, an EGR cooler valve and an EGR cooler which are connected in series in the first pipeline, an oil cooler valve and an oil cooler which are connected in series in the second pipeline, and a first thermostat which is connected with the first pipeline and the second pipeline respectively, and the first outlet of the first thermostat is communicated with the input end of the first water pump; the second cooling cycle comprises a second water pump, an engine block water jacket, a cylinder head water jacket and a second thermostat which are connected in series, and the first output port of the second thermostat is communicated with the input end of the second water pump, and the temperature of the cooling liquid in the second cooling cycle of the engine cooling system can be quickly raised at the start of the engine to adapt to the starting requirement in a cold environment.
Owner:WEICHAI POWER CO LTD

Oil temperature management assembly

An oil temperature management assembly (1) fluidically connectable to an oil circulation system (900) of an operating group of a vehicle (500) comprises an auxiliary heat exchanger (930). The oil temperature management assembly (1) comprises a primary heat exchanger (2) and a support and fluidic connection module (3). The module (3) comprises a module body (4), a thermostatic valve (5) and a bypass valve (6). The module body (4), to which the primary heat exchanger (2) is operatively connected, comprises: - an assembly inlet mouth (411) fluidically connectable to a first oil duct (901) through which the oil arriving from the operating group (500) flows and an assembly outlet mouth (412) fluidically connectable to a second oil duct (902) through which the oil flows towards the operating group (500); - a primary exchanger inlet mouth (421) and a primary exchanger outlet mouth (422) for the fluid connection of the primary heat exchanger (2) and the module (3), in which the primary exchanger outlet mouth (422) fluidically communicates with the assembly outlet mouth (412); - an auxiliary mouth (43) in which the oil flows towards the auxiliary heat exchanger (930). The thermostatic valve (5) is housed in the module body (4) in a thermostatic valve housing (45) and is fluidically connected to the assembly inlet mouth (411), to the primary exchanger inlet mouth (421) and the auxiliary mouth (43), detecting the temperature of the oil entering the module (3) and directing the oil towards the primary exchanger inlet mouth (421) and towards the auxiliary mouth (43). The bypass valve (6) housed in the module body (4) in a bypass valve housing (46), fluidically connected to the assembly inlet mouth (411), to the thermostatic valve (5) and to the assembly outlet mouth (421), detecting the oil pressure entering the module (3) and directing the oil towards the thermostatic valve (5) and / or towards the assembly outlet mouth (412).
Owner:UFI INNOVATION CENTER SRL

Construction Machine

There is provided a construction machine capable of increasing the intervals for replacing a hydraulic fluid. A hydraulic excavator includes an additive tank for storing an additive, an additive supply line for supplying the additive from the additive tank to a hydraulic fluid tank, an on-off valve disposed on the additive supply line and switchable between a closed state and an open state, a degree-of-oxidation sensor for sensing the degree to which the hydraulic fluid has been oxidized, and a controller. The controller performs control for reporting that the on-off valve is to switch into the open state or control for switching the on-off valve into the open state when the rate of change in the degree to which the hydraulic fluid has been oxidized is equal to or higher than a predetermined value. The controller performs control for reporting that the on-off valve is to switch into the open state or control for switching the on-off valve into the open state when the machine uptime from the time of replacement of the hydraulic fluid or the machine uptime from the time of switching of the on-off valve from the open state into the closed state is equal to or longer than a predetermined value.
Owner:HITACHI CONSTRUCTION MACHINERY CO LTD

OIL COOLER FOR A VEHICLE WITH A BYPASS VALVE

Oil cooler (100) for a vehicle, with: a supply tank (101) for the inflow of working fluid; a discharge tank (103) which is spaced apart from the inflow tank (101) by a predetermined distance and has a discharge hole (104) on a side facing the inflow tank (101); a plurality of pipes (T) which connect the inlet tank (101) to the outlet tank (103) in a longitudinal direction for the flow of the working fluid; a bypass valve (110) integrally mounted on an outer side of an end section of the inlet tank (101) and connected to an inner side of the inlet tank (101) to divert working fluid flowing therein by selectively opening and closing depending on the temperature of the working fluid or to direct it into the inlet tank (103); and a drain line (107) wherein one end is attached to the discharge hole (104) and another end is attached to the bypass valve (110) to connect the drain tank (103) to the bypass valve (110) for the discharge of the working fluid in the drain tank (103) via the bypass valve (110) according to the actuation of the bypass valve (110), wherein the bypass valve (110) has: a valve housing (111) which is integrally attached to the outside of one end of the inlet tank (101) and projects from one side of the inlet tank (101); and a control unit (120) which is arranged in the valve housing (111) and controls the working fluid to flow into or bypass the inlet tank (101) by performing an expansion or contraction depending on the temperature of the inflowing working fluid, wherein the valve housing (111) has: a first inlet hole (112) formed on one side of the same, which is the opposite end of the inlet tank (101), in order to attach an inlet connection (P1) to it; a bypass hole (114) formed on a further side of the same, which is spaced apart from the first inflow hole (112) in order to attach a bypass connection (P2) to it; a second inlet hole (113) facing the first inlet hole (112) at a surface that is in contact with the inlet tank (101) and connected to the inside of the inlet tank (101); and a connecting hole (115) spaced apart from the second inlet hole (113), with a protruding part extending from one side of the inlet tank (101) so that the other end of the drain pipe (107) is connected to it, wherein the control unit (120) has: a sliding element (121) in which one end is open and a mounting hole (H) is formed at the center of a further end, wherein a first opening hole (123) is formed on a side that corresponds to the first inlet hole (112) and the bypass hole (114) in a longitudinal direction, and at least a second opening hole (125) is formed on a further side that corresponds to the second inlet hole (113) and the connecting hole (115) in the longitudinal direction, and which is slidably inserted into the valve housing (111); an end cap (127) which is attached to a mounting hole (H) formed in the valve body to insert the sliding element (121) into the mounting hole (H), to close the mounting hole (H) and to form a mounting recess (129) at the center thereof; a fastening rod (135) with one end that is attached to the fastening recess (129); a deformable element (137) that is inserted into the sliding element (121) and moves forward or backward along the fastening rod (135) by expanding or contracting depending on the temperature of the working fluid in order to selectively move the sliding element (121) forward and backward; and a first elastic element (141) which is inserted between the valve housing (111) and the sliding element (121) and is compressed or stretched to provide an elastic force when the sliding element (121) moves, wherein the sliding element (121) has at least one relief hole (143) which is spaced apart from a mounting part (122) on the other side, where the mounting part (122) is formed, and which are spaced apart from each other at a predetermined angle in a circumferential direction around the mounting part (122).
Owner:HYUNDAI MOTOR CO LTD +1

An integrated thermostat structure and cooling system

This invention discloses an integrated thermostat structure and cooling system. It includes a housing, within which are a first main channel and a second main channel. The first main channel has a water pump outlet at its inlet and a cylinder head / cylinder block inlet at its outlet. The second main channel has a cylinder head outlet at its inlet and a small circulation outlet at its outlet. The second main channel is connected to a second, third, fourth, fifth, sixth, and seventh sub-channels. A one-way valve is installed before the third sub-channel on the second main channel. A cylinder block thermostat is installed on the second sub-channel, and a cylinder head thermostat is installed on the seventh sub-channel. This invention integrates the cylinder block and cylinder head thermostats within the housing piping of the thermostat structure, ensuring temperature control of the cylinder block and cylinder head while also regulating the operating temperatures of the engine oil, heater, and EGR system, ensuring efficient operation of the cooling system and reducing overall vehicle emissions.
Owner:DONGFENG FUJI THOMSON THERMOSTAT

Cooling system and cooling method

The invention discloses a cooling system and a cooling method.The cooling system comprises an intercooler and a supercharger and further comprises a cooling assembly, and the cooling assembly is used for cooling air before entering the intercooler and cooling engine oil of a turbine. The cooling assembly cools the air before entering the intercooler so as to reduce the temperature of the compressed air entering the intercooler, the intercooler cools the compressed air with the reduced temperature again, the temperature of the compressed air entering an air cylinder of the engine is reduced, and the problem that the cooling capacity of the intercooler is limited when the environment temperature is high is solved. The cooling assembly cools engine oil of the turbine, engine damage caused by abrasion of moving parts due to the fact that the temperature of the engine oil is too high is avoided, and engine reliability is guaranteed.
Owner:WEICHAI POWER CO LTD