Temperature control type engine lubricating system

Abstract

The invention is suitable for the technical field of engines, and provides a temperature control type engine lubricating system which comprises a switching three-way valve, a plurality of sensors and an engine controller, and the temperature control type engine lubricating system obtains monitoring data of the sensors, judges and controls the switching three-way valve to be switched in a first passage state, a second passage state and a third passage state in combination with the working condition of an engine. According to the system, a traditional wax type thermostat can be replaced by a simple electric control tee joint, the flow of engine oil to be cooled can be controlled in real time, then precise temperature control over the engine oil in the starting process of an engine is achieved, it is ensured that the engine is rapidly warmed up in the starting process of the engine, and a certain oil saving effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and in particular to a temperature-controlled engine lubrication system. Background Art

[0002] In the existing automobile engine lubrication system, the engine oil temperature is mainly forced to cool through the oil cooler, and the oil flow is passively provided by the oil pump based on the engine speed. Therefore, the oil temperature and oil flow cannot be actively controlled in real time. This design meets the use requirements when the engine is in a stable working state.

[0003] However, when the engine is just started, the oil temperature is very low. At this time, since the oil has not reached the optimal operating temperature, forced cooling of the oil will reduce viscosity and increase frictional work loss between components, and fuel consumption will also increase; the oil flow rate is generally limited by the speed of the oil pump, that is, the engine speed. The oil is cooled by water in the oil cooler. The engine working process is complicated, and how to accurately control the oil flow rate through the oil temperature and the coolant temperature at the same time has become a difficult problem.

[0004] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the invention

[0005] In view of the above-mentioned defects, the purpose of the present invention is to provide a temperature-controlled engine lubrication system, which can replace the traditional wax thermostat with a simple electronically controlled tee, and can control the flow rate of the oil to be cooled in real time, thereby realizing precise temperature control of the oil during engine starting, ensuring rapid warm-up of the engine during starting, and having a certain fuel-saving effect.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a temperature-controlled engine lubrication system, including a switching three-way valve, whose three interfaces are respectively connected to an oil inlet pipeline, an oil cooler inlet pipeline and an oil cooler outlet pipeline; a plurality of sensors, which are used to obtain the oil temperature in the lubrication system, the water temperature in the engine and the ambient temperature; an engine controller, which obtains the monitoring data of the plurality of sensors and controls the switching three-way valve to switch between passage one, passage two and passage three states in combination with engine operating condition judgment; in passage one, the oil in the oil inlet pipeline avoids the oil cooler and enters various lubrication branches of the engine; in passage two, the oil in the oil inlet pipeline passes through the oil cooler and enters various lubrication branches of the engine; in passage three, part of the oil in the oil inlet pipeline passes through the oil cooler and part avoids the oil cooler, and finally mixes in the oil cooler outlet pipeline and enters various lubrication branches of the engine.

[0007] According to the temperature-controlled engine lubrication system of the present invention, the multiple sensors include a water temperature sensor for monitoring the water temperature in the engine and an ambient temperature sensor, where the water temperature is denoted as T3 and the ambient temperature is denoted as T4.

[0008] According to the temperature-controlled engine lubrication system of the present invention, when the engine is in working condition one, the condition for switching the three-way valve to enter passage one is that the engine controller monitors that the vehicle start switch is actuated to the power-on state, |T3-T4| is lower than the first set temperature, and then the engine enters working condition three.

[0009] According to the temperature-controlled engine lubrication system of the present invention, the first set temperature is 10°.

[0010] According to the temperature-controlled engine lubrication system of the present invention, the multiple sensors also include a first oil temperature and pressure sensor installed at the oil inlet pipeline, recording temperature T1 and pressure P1, and a second oil temperature and pressure sensor installed at the oil cooler outlet pipeline, recording temperature T2 and pressure P2.

[0011] According to the temperature-controlled engine lubrication system of the present invention, when the engine is in working condition two, the engine controller monitors that the vehicle start switch is actuated to the power-on state. If |T3-T4|>10°C, T1 and T2 are monitored: if T2≤75°C and |T1-T2|<5°C, the three-way valve is switched to enter passage one, and then the engine enters working condition three; if T2>75°C and |T1-T2|<5°C, the three-way valve is switched to enter passage two, and then the engine enters passage three; if |T1-T2|≥5°C, faults of T1 and T2 sensors are reported.

[0012] According to the temperature-controlled engine lubrication system of the present invention, the engine enters working condition three. When the temperature of T2 reaches 80±5°C, the engine controller adjusts the opening of the opening of the switching three-way valve connected to the inlet pipeline of the oil cooler, and part of the oil flows through the oil cooler, and monitors the temperature of T1 in real time. If T1>90°C, the switching three-way valve enters the passage three state; once T1>100°C, the difference (P2@1400rpm-P1@1400rpm) is monitored and compared with the historical difference data Poriginal@1400rpm and Plast@1400rpm. If ((P2@1400rpm-P1@ If the difference is higher than 50kPa for more than 30s and higher than 100kPa for more than 5s in the accumulated time, the opening of the switching three-way valve connecting the inlet pipeline of the oil cooler is reduced, and the oil inflow of the opening of the switching three-way valve connecting the outlet pipeline of the oil cooler is increased. If the oil pressure is lower than 50kPa at this time, the above two openings are opened in parallel, and the oil temperature and pressure are monitored in real time. The alarm reminds the driver to check the vehicle and the engine is torque-limited to ensure that the vehicle can run to the maintenance station.

[0013] The present invention provides a temperature-controlled engine lubrication system, comprising a switching three-way valve, wherein three interfaces of the switching three-way valve are respectively connected to an oil inlet pipeline, an oil cooler inlet pipeline and an oil cooler outlet pipeline; a plurality of sensors, which are used to obtain the oil temperature in the lubrication system, the water temperature in the engine and the ambient temperature; an engine controller, which obtains the monitoring data of the plurality of sensors and controls the switching three-way valve to switch among passage one, passage two and passage three states in combination with engine working condition judgment; in passage one, the oil in the oil inlet pipeline avoids the oil cooler and enters various lubrication branches of the engine; in passage two, the oil in the oil inlet pipeline passes through the oil cooler and enters various lubrication branches of the engine; in passage three, part of the oil in the oil inlet pipeline passes through the oil cooler and part avoids the oil cooler, and finally is mixed in the oil cooler outlet pipeline and enters various lubrication branches of the engine. The present invention can replace the traditional wax thermostat with a simple electronically controlled tee, and can control the flow of the oil to be cooled in real time, thereby achieving precise temperature control of the oil during engine starting, ensuring rapid warm-up of the engine during starting, and having a certain fuel-saving effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a connection schematic diagram of the lubrication system of the present invention. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0016] See also Figure 1 The present invention provides a temperature-controlled engine lubrication system, the temperature-controlled engine lubrication system comprising

[0017] Switch the three-way valve, whose three interfaces are respectively connected to the oil inlet pipeline, the oil cooler inlet pipeline and the oil cooler outlet pipeline;

[0018] Multiple sensors for obtaining the oil temperature in the lubrication system, the water temperature in the engine, and the ambient temperature;

[0019] An engine controller, which obtains monitoring data from multiple sensors and combines it with engine operating condition judgment to control the switching three-way valve to switch between channel one, channel two, and channel three;

[0020] In passage 1, the oil in the oil inlet line bypasses the oil cooler and enters various lubrication branches of the engine;

[0021] In passage 2, the oil in the oil inlet line passes through the oil cooler and enters various lubrication branches of the engine;

[0022] In passage three, part of the oil in the oil inlet pipeline passes through the oil cooler, and part of it avoids the oil cooler, and finally mixes in the oil cooler outlet pipeline and enters various lubrication branches of the engine.

[0023] A switching three-way valve (a transmission electric three-way valve can be used), two oil temperature and pressure sensors and related oil pipes are added to the traditional lubrication circuit. The electric three-way valve is driven by a motor to achieve (as shown in the figure): port 3 is connected to port 1 separately, port 3 is connected to port 2 separately, and port 3 is connected to port 1 and port 2 at the same time, and the working switching between three states.

[0024] When the engine is started, the engine control monitors the oil temperature and pressure sensor 1 (T1, P1) and the oil temperature and pressure sensor 2 (T2, P2) as well as the water temperature sensor (T3) and the ambient temperature sensor (T4) that come with the traditional engine. Based on these six parameters, the engine controller controls the switching status of the electronically controlled three-way valve ports 1, 2 and 3, and controls the oil flow circuit, so that the engine can warm up and heat up as quickly as possible, thereby achieving the purpose of saving fuel and reducing emissions.

[0025] In operating condition one, the engine controller detects that the vehicle start switch has been activated and is powered on. If |T3-T4|≤10℃, the controller closes port 1 of the electronically controlled three-way valve and opens ports 2 and 3. The engine oil is directly transported to the various lubrication branches of the engine without passing through the oil cooler, and then enters operating condition three.

[0026] In the second operating condition, the engine controller detects that the vehicle start switch has been activated and is powered on. If |T3-T4|>10℃, it monitors T1 and T2: if T2≤75℃ and |T1-T2|<5℃, the controller closes port 1 of the electronically controlled three-way valve, opens ports 2 and 3, and the engine oil is directly transported to the various lubrication branches of the engine without passing through the oil cooler, and then enters the third operating condition; if T2>75℃ and |T1-T2|<5℃, the controller closes port 2 of the electronically controlled three-way valve, opens ports 1 and 3, and the engine oil is directly transported to the various lubrication branches of the engine without passing through the oil cooler, and then enters the third operating condition; if |T1-T2|≥5℃, a fault in the T1 and T2 sensors is reported.

[0027] Working condition three: as the engine runs, the oil temperature rises rapidly, and the water temperature also rises continuously. When the temperature of T2 reaches 80±5℃, the engine controller adjusts the opening of the electronically controlled three-way valve port 1, and part of the oil flows through the oil cooler, and monitors the temperature of T1 in real time. Once T1>90℃, the electronically controlled three-way valve port 1 is fully opened and port 2 is closed. At this time, the cooling efficiency of the oil cooler is the highest; once T1>100℃, the difference of (P2@1400rpm-P1@1400rpm) is monitored, and compared with the historical difference data P original@1400rpm and P last@1400rpm. For comparison, if ((P2@1400rpm-P1@1400rpm)-Poriginal@1400rpm) is less than 50kPa, it is considered normal. Otherwise, an oil cooler blockage warning is issued. If the difference is continuously higher than 50kPa for more than 30s and higher than 100kPa for more than 5s during the cumulative time, the oil inflow at port 1 is reduced and the oil inflow at port 2 is increased. If the oil pressure is lower than 50kPa at this time, ports 1 and 2 are opened in parallel, and the oil temperature and pressure are monitored in real time. An alarm is issued to remind the driver to check the vehicle and the engine is torque-limited to ensure that the vehicle can run to the maintenance station.

[0028] In summary, the present invention provides a temperature-controlled engine lubrication system, including a switching three-way valve, whose three interfaces are respectively connected to an oil inlet pipeline, an oil cooler inlet pipeline and an oil cooler outlet pipeline; a plurality of sensors, which are used to obtain the oil temperature in the lubrication system, the water temperature in the engine and the ambient temperature; an engine controller, which obtains the monitoring data of the plurality of sensors and controls the switching three-way valve to switch between passage one, passage two and passage three states in combination with engine operating condition judgment; in passage one, the oil in the oil inlet pipeline avoids the oil cooler and enters various lubrication branches of the engine; in passage two, the oil in the oil inlet pipeline passes through the oil cooler and enters various lubrication branches of the engine; in passage three, part of the oil in the oil inlet pipeline passes through the oil cooler and part avoids the oil cooler, and finally is mixed in the oil cooler outlet pipeline and enters various lubrication branches of the engine. The present invention can replace the traditional wax thermostat with a simple electronically controlled tee, and can control the flow of the oil to be cooled in real time, thereby achieving precise temperature control of the oil during engine starting, ensuring rapid warm-up of the engine during starting, and having a certain fuel-saving effect.

[0029] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A temperature-controlled engine lubrication system, characterized in that: include Switch the three-way valve, whose three interfaces are respectively connected to the oil inlet pipeline, the oil cooler inlet pipeline and the oil cooler outlet pipeline; Multiple sensors for obtaining the oil temperature in the lubrication system, the water temperature in the engine, and the ambient temperature; An engine controller, which obtains monitoring data from multiple sensors and combines it with engine operating condition judgment to control the switching three-way valve to switch between channel one, channel two, and channel three; In passage 1, the oil in the oil inlet line bypasses the oil cooler and enters various lubrication branches of the engine; In passage 2, the oil in the oil inlet line passes through the oil cooler and enters various lubrication branches of the engine; In passage three, part of the oil in the oil inlet pipeline passes through the oil cooler, and part of it avoids the oil cooler, and finally mixes in the oil cooler outlet pipeline and enters various lubrication branches of the engine.

2. The temperature-controlled engine lubrication system according to claim 1, characterized in that: The multiple sensors include a water temperature sensor for monitoring the water temperature in the engine and an ambient temperature sensor, where the water temperature is recorded as T3 and the ambient temperature is recorded as T4.

3. The temperature-controlled engine lubrication system according to claim 2, characterized in that: When the engine is in working condition one, the condition for switching the three-way valve to enter passage one is that the engine controller detects that the vehicle start switch is actuated to the power-on state, |T3-T4| is lower than the first set temperature, and then the engine enters working condition three.

4. The temperature-controlled engine lubrication system according to claim 1, characterized in that: The first set temperature is 10°.

5. The temperature-controlled engine lubrication system according to claim 2, 3 or 4, characterized in that: The multiple sensors also include a first oil temperature and pressure sensor installed at the oil inlet pipeline, recording temperature T1 and pressure P1, and a second oil temperature and pressure sensor installed at the oil cooler outlet pipeline, recording temperature T2 and pressure P2.

6. The temperature-controlled engine lubrication system according to claim 1, characterized in that: When the engine is in operating condition two, the engine controller detects that the vehicle start switch has moved to the power-on state. If |T3-T4|>10℃, T1 and T2 are monitored: if T2≤75℃ and |T1-T2|<5℃, the three-way valve is switched to enter passage one, and then the engine enters operating condition three; if T2>75℃ and |T1-T2|<5℃, the three-way valve is switched to enter passage two, and then the engine enters passage three; if |T1-T2|≥5℃, T1 and T2 sensor failures are reported.

7. The temperature-controlled engine lubrication system according to claim 3 or 6, characterized in that: The engine enters the third operating condition. When the temperature of T2 reaches 80±5℃, the engine controller adjusts the opening of the opening of the switch three-way valve connecting the oil cooler inlet pipe, and part of the oil flows through the oil cooler. The temperature of T1 is monitored in real time. If T1>90℃, the switch three-way valve enters the third state of passage. Once T1>100℃, the difference of (P2@1400rpm-P1@1400rpm) is monitored and compared with the historical difference data P original @1400rpm and P last @1400rpm. If ((P2@1400rpm-P1@1400rpm)- P original @1400rpm)<50kPa, it is considered normal, otherwise an oil cooler blockage warning is issued. If the difference is continuously higher than 50kPa for more than 30s and higher than 100kPa for more than 5s in the cumulative time, the opening of the switching three-way valve connecting the oil cooler inlet pipeline is reduced, and the oil inflow of the opening of the switching three-way valve connecting the oil cooler outlet pipeline is increased. If the oil pressure is lower than 50kPa at this time, the above two openings are opened in parallel, and the oil temperature and pressure are monitored in real time. An alarm is issued to remind the driver to check the vehicle, and the engine is torque-limited to ensure that the vehicle can run to the maintenance station.

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