CN211819562U - Engine system and engine oil cover - Google Patents

Abstract

The utility model discloses an engine system and an engine oil cover. The engine comprises an oil cover and a crankcase, the oil cover is provided with a gasoline vapor sensor, and the gasoline vapor sensor is used to detect the gasoline content in the oil-gas mixture of the crankcase; The control unit pre-stores the gasoline content in the piston ring blow-by gas under different working conditions. The engine system and engine oil cover provided by this solution are equipped with a gasoline vapor sensor, which can detect the piston ring blow-by gas in the oil-air mixture in the crankcase, and then indirectly obtain the oil vapor content through the calibrated piston ring blow-by gas, so as to analyze the current The dilution level of the engine oil can be checked without stopping the engine for random inspection. The detection cost is relatively low, and the detection method is faster and simpler, which can help the driver to find the oil dilution of the engine in time, so as to avoid possible poor lubrication and protect the vehicle. safe driving.

Description

Engine system and engine oil cap

technical field

The utility model relates to the technical field of engines, in particular to an engine system and an engine oil cover.

Background technique

When the gasoline of the engine is injected into the cylinder body to participate in the combustion, the gasoline may flow into the oil in the oil pan along the cylinder wall of the cylinder, which is easy to cause the problem of oil dilution, especially in winter when the temperature is low, the phenomenon of oil dilution More pronounced, and oil dilution can lead to poor lubrication.

At present, the oil dilution rate (the ratio of gasoline in the oil) is mainly evaluated by special instruments such as chromatographic analyzers and infrared analyzers, and the oil in the engine is sampled, and then tested by such instruments. However, the price of such special instruments is relatively high, the detection is cumbersome and the cycle is long.

Utility model content

The utility model provides an engine system, the engine comprises an oil cover and a crankcase, the oil cover is provided with a gasoline vapor sensor, and the gasoline vapor sensor is used to detect the gasoline content in the oil-gas mixture of the crankcase; and also includes a control unit, the The control unit pre-stores the gasoline content in the piston ring blow-by gas under different working conditions.

Optionally, the oil cover is provided with a pressure sensor to detect the pressure of the crankcase; the engine system includes a breathing tube, and the breathing tube is provided with an electric heater, and the control unit is based on the detected crankshaft The pressure of the box, control the opening and closing of the electric heater and adjust the power.

Optionally, the electric heater is provided in a fully loaded breathing tube in the breathing tube.

Optionally, a one-way channel is also included, and a one-way valve is arranged in the one-way channel, which can lead the crankcase to the outside in one way.

Optionally, a pressure and oil dilution monitoring device is included, and the pressure and oil dilution monitoring device includes a base integrated with the gasoline vapor sensor, the pressure sensor and forming the one-way channel.

Optionally, the pressure and oil dilution monitoring device is mounted on a filler port of the oil cap.

Optionally, it also includes an instrument, and the control unit controls the instrument to light up and display according to the comparison between the detected gasoline content in the oil-air mixture of the crankcase and the gasoline content in the pre-stored piston ring blow-by gas.

The utility model also provides an engine oil cover, the oil cover is provided with a gasoline vapor sensor for detecting gasoline content in a crankcase oil-gas mixture, a pressure sensor for detecting the crankcase pressure, and a one-way channel, the one-way channel A one-way valve is provided inside, which can lead the crankcase to the outside in one way.

Optionally, a pressure and oil dilution monitoring device is installed on the filling port of the oil cap, and the pressure and oil dilution monitoring device includes a base, and the base is integrated with the gasoline vapor sensor, the pressure sensor and the The one-way channel is formed.

The engine system and engine oil cover provided by this solution are equipped with a gasoline vapor sensor, which can detect the piston ring blow-by gas in the oil-air mixture in the crankcase, and then indirectly obtain the oil vapor content through the calibrated piston ring blow-by gas, so as to analyze the current The oil dilution level of the engine can be checked without stopping the engine for random inspection. The inspection cost is relatively low, and the inspection method is faster and simpler, which can help the driver to find the oil dilution of the engine in time, so as to avoid possible poor lubrication and protect the vehicle. safe driving.

Description of drawings

FIG. 1 is a schematic diagram of a specific embodiment of an engine system provided by the present invention.

The reference numerals are explained as follows:

101 Pressure and Oil Dilution Monitoring Device, 101a Gasoline Vapor Sensor, 101b Oil Pressure Sensor, 101c Check Valve, 102 Engine Body, 20 Oil Separation Unit, 30 Pressure Control Valve, 401 Full Load Breathing Tube, 402 Part Load Breathing Tube, 403 Electric heater, 404 check valve, 50 air filter, 60 supercharger, 70 intercooler, 80 throttle, 90 intake manifold;

01ECU, 02 meter.

Detailed ways

In order to make those skilled in the art better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Please refer to FIG. 1 , which is a schematic diagram of a specific embodiment of an engine system provided by the present invention.

The engine system in this embodiment includes an engine and a control unit, the control unit may be the ECU01 of the engine shown in FIG. 1 , the engine includes an engine body 102, the engine body 102 includes a crankcase and an oil cap, and the oil cap is provided with gasoline The vapor sensor 101a, the gasoline vapor sensor 101a is used to detect the gasoline content in the crankcase oil-fuel mixture. The oil-air mixture in the crankcase includes oil vapors and blow-by gases from the piston rings.

The engine system also includes a control unit, which can pre-store the gasoline content in the piston ring blow-by gas under different working conditions, that is, calibrate the gasoline content data of the piston ring blow-by gas into the control unit in advance. The detected gasoline content is only piston ring blow-by and is not disturbed by other components. In this way, when the vehicle is running, the gasoline vapor sensor 101a can collect the content of the oil and gas mixture in the crankcase in real time, and transmit the data to the control unit, for example, to the ECU01. Real-time comparison, that is, obtaining the piston ring blow-by gas content corresponding to the current working condition according to the calibration data, and removing the corresponding piston ring blow-by gas content from the detected oil-air mixture content, the oil vapor content in the oil-gas mixture can be analyzed and obtained, thereby obtaining The gasoline content of the current oil, from which the engine oil dilution can be calculated.

The limit value of the oil dilution level can be set in the control unit. If the oil dilution level is found to have exceeded the design limit after comparison, the instrument 02 in the cab can be controlled to light up the alarm to remind the driver of the risk of oil dilution.

In this embodiment, the oil vapor content can be obtained indirectly by calibrating the piston ring blow-by gas and real-time detection of the oil-air mixture content in the crankcase, so as to analyze the current oil dilution level, and it is not necessary to stop the machine to conduct random inspection of the oil, and the detection cost is relatively low. In addition, the detection method is faster and simpler, which can help the driver to detect the oil dilution of the engine in time, thereby avoiding the possible poor lubrication and ensuring the safe driving of the vehicle.

Further, as shown in FIG. 1 , the oil cap of the engine is further provided with a pressure sensor 101b for detecting the pressure in the crankcase. It should be known that the engine system includes a breathing tube, and the breathing tube includes a full-load breathing tube 401 and a partial-load breathing tube 402 . When the engine is working, the gas (that is, the above-mentioned piston ring blow-by gas) into the crankcase through the piston ring passes through the oil and gas separation unit 20 to separate the oil vapor, and then passes through the pressure control valve 30 for pressure control, and then passes through the full-load breathing tube 401. Or the part-load breathing tube 402 (a check valve 404 is provided between the pressure control valve 30 and the part-load breathing tube 402 ) flows to the intake manifold 90 , and then re-enters the cylinder to participate in combustion. When the full-load breathing tube 401 freezes, the crankcase ventilation system will be blocked, and the pressure of the crankcase will gradually increase.

In this embodiment, an electric heater 403 is provided on the breathing tube. When the control unit determines that the pressure sensor 101b detects that the pressure of the engine crankcase is higher than the limit value, the control unit will send a signal to control the electric heater 403 to turn on and operate in a low temperature environment At this time, the electric heater 103 can always be turned on to prevent the breathing tube from freezing. At this time, when the pressure exceeds the limit value, the electric heater 403 is already in a heating state, and the control unit can also control the power of the electric heater 403 to increase to increase Further promotes melting of the ice on the breathing tube, keeping the breathing tube clear. According to the pressure value detected by the pressure sensor 101b, when the crankcase pressure returns to normal, the electric heater 403 can be turned off, or the power of the electric heater 403 can be adjusted to decrease, so as to reduce the load loss of the engine.

The electric heater 403 can be specifically installed in the full-load breathing tube 401. In a low temperature environment, when driving for a long time, the crankcase blow-by gas generally flows out through the full-load breathing tube 401, and the high pressure is generally also due to the freezing of the full-load breathing tube 401. Therefore, the electric heater 14 of the fully loaded breathing tube 401 is controlled to promote the melting of ice.

As shown in FIG. 1 , the engine system further includes a one-way channel, and the one-way channel realizes one-way conduction by arranging a one-way valve 101c in the channel, and the one-way conduction path is to conduct the crankcase to the outside.

Under normal circumstances, the air circulation path of the engine is as follows: the external fresh air is filtered by the air filter 50, then supercharged by the supercharger 60, and then cooled by the intercooler 70, and then can enter the intake manifold 90, and the throttle valve 80 passes through The opening degree is adjusted to control the amount of gas entering the intake manifold 90. The gas enters the cylinder block and participates in combustion. The gas entering the crankcase will be separated by the oil and gas separation unit 20, and then enter the cylinder again from the intake manifold 90 through the breathing pipe. in vivo.

However, under conditions such as the throttle release, the pressure in the intake manifold 90 is much lower than the pressure in the crankcase. At this time, the gas in the crankcase will directly flow into the intake manifold 90, resulting in a decrease in the pressure in the crankcase. , the reduction of crankcase pressure may cause risks such as oil leakage from the oil seal. In this solution, due to the one-way channel, when the crankcase pressure is lower than the limit value, the one-way valve 101c is opened, and external fresh air can enter the crankcase through the one-way channel, thereby keeping the pressure in the crankcase stable.

The gasoline vapor sensor 101a, the pressure sensor 101b and the one-way channel in the above embodiment can be integrated to form a pressure and oil dilution monitoring device 101. As shown in FIG. 1, the pressure and oil dilution monitoring device 101 includes a base, and the base is integrated A gasoline vapor sensor 101a and a pressure sensor 101b are provided, and a channel running through the upper and lower sides is provided on the base. Both ends of the channel are connected to the outside, and a one-way valve 101c is installed in the channel. During installation, the pressure and oil dilution monitoring device 101 can be integrally installed on the filling port of the oil cap to replace the existing oil cap. The gasoline vapor sensor 101a and the pressure sensor 101b can detect the steam in the crankcase through the filling port. When the crankcase pressure is lower than the limit value, the external fresh air can enter the crankcase through the one-way channel. The pressure and oil dilution monitoring device 101 has a simple and compact structure.

It can be understood that the pressure and oil dilution monitoring device 101 is not limited to being installed at the filling port of the oil cap, and can also be located in other positions as long as it can communicate with the crankcase, but the integrated device is installed at the filling port position, The connection to the crankcase can be achieved almost without changing the oil cap, which is very versatile and easy to assemble.

The above are only the preferred embodiments of the present utility model. It should be pointed out that for those skilled in the art, without departing from the principles of the present utility model, several improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (9)

1. The engine system is characterized in that the engine oil cover is provided with a gasoline vapor sensor (101a), and the gasoline vapor sensor (101a) is used for detecting the gasoline content in an oil-gas mixture of the crankcase; the piston ring blow-by gas control device further comprises a control unit, wherein the control unit prestores the gasoline content in the piston ring blow-by gas under different working conditions.

2. The engine system according to claim 1, characterized in that the oil cover is provided with a pressure sensor (101b) to detect a pressure of the crankcase; the engine system comprises a breathing pipe, the breathing pipe is provided with an electric heater (403), and the control unit controls the opening and closing of the electric heater (403) and adjusts the power according to the detected pressure of the crankcase.

3. An engine system according to claim 2, characterized in that the electric heater (403) is provided in a full load breathing tube (401) of the breathing tubes.

4. The engine system according to claim 2, further comprising a check passage, in which a check valve (101c) is provided to enable one-way communication of the crankcase to the outside.

5. The engine system of claim 4, comprising a pressure and oil dilution monitoring device (101), the pressure and oil dilution monitoring device (101) comprising a base that integrates the gasoline vapor sensor (101a), the pressure sensor (101b), and forms the one-way passage.

6. An engine system according to claim 5, characterized in that said pressure and oil dilution monitoring device (101) is mounted to the filler opening of said oil cover.

7. The engine system according to any one of claims 1-6, further comprising a meter (02), wherein the control unit controls the meter (02) to light up according to the comparison between the detected gasoline content in the crankcase air-fuel mixture and the pre-stored gasoline content in the piston ring blow-by gas.

8. Engine oil cover, its characterized in that, the oil cover is equipped with gasoline vapor sensor (101a), the detection of petrol content in the detection crankcase oil gas mixture pressure sensor (101b) of crankcase pressure to and one way passage, be equipped with check valve (101c) in the one way passage, can one-way conduction crankcase to outside.

9. The engine oil cover according to claim 8, characterized in that the filler opening of the oil cover is fitted with a pressure and oil dilution monitoring device (101), the pressure and oil dilution monitoring device (101) comprising a base which integrates the gasoline vapor sensor (101a), the pressure sensor (101b) and forms the one-way passage.

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