TWI664348B - Active internal combustion engine piston air pressure reducing device - Google Patents

Abstract

An active internal combustion engine piston air resistance decompression device includes: an air pipe connected to a crankcase of an internal combustion engine, an oil and gas transmission pump disposed in the air pipe, a state sensor, and a control unit to respond to the state sense The sensing result of the detector is to control the oil and gas transmission pump to decompress the crankcase before the internal combustion engine is operated and / or during the internal combustion engine operation.

Description

Active internal combustion engine piston air resistance decompression device

The invention relates to a crankcase decompression device, in particular to an active internal combustion engine piston air resistance decompression device.

The internal combustion engine is the power source of most power-driven machinery such as automobiles, ships, and airplanes. It converts the heat generated by the combustion of fuel, that is, the chemical energy contained in matter into thermal energy, and then becomes mechanical energy. A common internal combustion engine uses the expansion force generated by combustion to push the piston, and the crankshaft converts the kinetic energy of the piston's linear reciprocating motion into rotational kinetic energy.

In this type of internal combustion engine, usually when the piston moves upward, the crankcase space becomes larger, and gas is drawn into the crankcase. When the piston moves downward, the space is compressed, so that the gas previously sucked into the crankcase is pushed out of the crankshaft. In the process, air resistance will be generated, which will affect the movement of the piston, causing part of the kinetic energy to be consumed due to resistance.

Therefore, an object of the present invention is to provide an active-type internal combustion engine piston air resistance decompression device to solve the air resistance problem encountered by the piston when the internal combustion engine is running.

The technical means adopted by the present invention to solve the problems of the conventional technology is to provide an active internal combustion engine piston air resistance decompression device, which is applied to an internal combustion engine. The active internal combustion engine piston air resistance decompression device includes: A crankcase of the internal combustion engine; an oil and gas transmission pump disposed on the air pipe, and an intake end of the oil and gas transmission pump communicates with the crankcase through the air pipe; a state sensor including a crankcase A pressure sensing element for sensing the pressure in the crankcase; a control unit electrically connected to the status sensor and the oil and gas transmission pump, and the control unit is set to be based on the sensing of the status sensor As a result, the crankcase is controlled to decompress and exhaust the crankcase before and / or during the operation of the internal combustion engine.

According to an embodiment of the present invention, an active internal combustion engine piston air resistance decompression device is provided, wherein the state sensor further includes a crankcase temperature sensing element for sensing a temperature in the crankcase.

In one embodiment of the present invention, an active internal combustion engine piston air resistance decompression device is provided, wherein the state sensor further includes a pipeline pressure sensing element for sensing a pressure in the ventilation pipe.

According to an embodiment of the present invention, an active internal combustion engine piston air resistance decompression device is provided, wherein the state sensor further includes a pipe temperature sensing element for sensing a temperature in the ventilation pipe.

An embodiment of the present invention provides an active internal combustion engine piston air resistance decompression device, further including an intake end check valve, which is disposed on the vent pipe and is located upstream of the intake end of the oil and gas transmission pump. side.

According to an embodiment of the present invention, an active-type internal combustion engine piston air-blocking pressure reducing device is further provided, and further includes an outlet end check valve disposed on the vent pipe and located on a downstream side of the outlet end of the oil and gas transmission pump.

According to an embodiment of the present invention, an active internal combustion engine piston air resistance decompression device is further provided. The device further includes an oil and gas filter disposed on the vent pipe and located on a downstream side of an air outlet of the oil and gas transmission pump.

In one embodiment of the present invention, an active internal combustion engine piston air-blocking pressure reducing device is provided, further comprising an air-tight bypass valve, bypassed to the vent pipe, and located upstream of an air inlet end of the oil-gas transmission pump. Side for oil and gas to flow from the vent pipe through the airtight bypass valve.

An embodiment of the present invention provides an active internal combustion engine piston air-blocking pressure reducing device, further comprising an oil and gas filter connected to a downstream side of the air-tight bypass valve to filter the air-tight bypass valve. Outgoing oil and gas.

An embodiment of the present invention provides an active internal combustion engine piston air pressure reduction device, further comprising a manual switch connected to the control unit, and closing the passage by closing the active internal combustion engine piston air pressure reduction device. trachea.

According to the technical means adopted by the present invention, the active internal combustion engine piston air-blocking decompression device of the present invention can timely exhaust and decompress the crankcase according to the state of the crankcase before and / or during the operation of the internal combustion engine. . As a result, the resistance of the piston of the internal combustion engine during compression operation is reduced, so that the internal combustion engine can run more smoothly, and the energy conversion efficiency can be improved, thereby improving the performance of the internal combustion engine. In addition, compared with the conventional pressure reducing device composed of a passive element such as a check valve, the active internal combustion engine piston air-blocking pressure reducing device of the present invention performs active pressure reduction by using an oil and gas transmission pump. There are problems such as low decompression ability, insufficient effect, poor closing and easy leakage.

100‧‧‧ Piston air resistance decompression device for active internal combustion engine

1‧‧‧ ventilation tube

2‧‧‧oil and gas transmission pump

21‧‧‧Air inlet

22‧‧‧ Outlet

3‧‧‧ status sensor

31‧‧‧Crankcase pressure sensing element

32‧‧‧Crankcase temperature sensing element

33‧‧‧Pipe pressure sensing element

34‧‧‧Pipe temperature sensor

4‧‧‧Control unit

5‧‧‧Inlet check valve

6‧‧‧ outlet check valve

7‧‧‧oil and gas filter

8‧‧‧Airtight bypass valve

81‧‧‧oil and gas filter

9‧‧‧ operation interface

91‧‧‧Manual switch

C‧‧‧Crankcase

C1‧‧‧ Vent

F‧‧‧Ventilation system

F1‧‧‧ intake pipe

F2‧‧‧ exhaust pipe

[Fig. 1] is a block diagram showing an active internal combustion engine piston air pressure reduction device according to an embodiment of the present invention; [Fig. 2] is an active internal combustion engine piston air pressure reduction device according to an embodiment of the present invention Block diagram of the device when the engine is running.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2. This description is not intended to limit the embodiment of the present invention, but is an example of the embodiment of the present invention.

As shown in FIGS. 1 and 2, an active internal combustion engine piston air pressure reduction device 100 according to an embodiment of the present invention is applied to an internal combustion engine having a crankcase C and a crankcase of the internal combustion engine. C is connected to a ventilation system F. The ventilation system F includes an intake pipe F1 and an exhaust pipe F2. The active internal combustion engine piston air pressure reduction device 100 includes: an air pipe 1 communicating with a crankcase of the internal combustion engine C, the ventilation pipe 1 is independent of the ventilation system F and is not connected to the intake pipe F1 and the exhaust pipe F2; an oil and gas transmission pump 2 is provided in the ventilation pipe 1 and the oil and gas transmission pump An intake end 21 of the pump 2 communicates with the crankcase C through the vent pipe 1; a state sensor 3 includes a crankcase pressure sensing element 31 for sensing the pressure in the crankcase C; A control unit 4 is electrically connected to the status sensor 3 and the oil and gas transmission pump 2. The control unit 4 is set to be based on the sensing result of the status sensor 3 before the internal combustion engine runs and before the internal combustion engine. Control the oil and gas transmission pump every time the piston compresses during operation 2 The crankcase pumping C under reduced pressure.

Specifically, as shown in FIGS. 1 and 2, the active-engine internal combustion engine piston air pressure reduction device 100 is installed outside the internal combustion engine. The vent pipe 1 is connected to the vent C1 of the crankcase C, and communicates with the crankcase C via the vent C1. Therefore, through the vent pipe 1, the oil and gas transmission pump 2 can evacuate the crankcase C from the intake end 21 and exhaust the extracted oil and gas from the outlet end 22. As the oil and gas transmission pump 2, in addition to the general one-way suction function, a two-way suction pump with a forward and reverse action function can also be selected. Gas for more precise adjustment.

As shown in FIG. 1 and FIG. 2, according to an embodiment of the present invention, an active internal combustion engine piston air pressure reduction device 100, the state sensor 3 further includes a crankcase temperature sensing element 32 and a pipeline pressure sensor. The sensing element 33 and a pipe temperature sensing element 34. The crankcase temperature sensing element 32 is used to sense the temperature in the crankcase C, the pipe pressure sensing element 33 is used to sense the pressure in the vent pipe 1, and the pipe temperature sensing element 34 is used to sense Measure the temperature in the snorkel 1. The status sensor 3 transmits the sensing results of these pressures and temperatures to the control unit 4 to confirm whether the working pressure and temperature of the internal combustion engine are normal to determine whether the active internal combustion engine piston air-blocking decompression device 100 is performing. jobs. In addition, in this embodiment, the crankcase pressure sensing element 31 and the crankcase temperature sensing element 32 are implemented by a single integrated temperature and pressure sensor, the pipeline pressure sensing element 33 and the pipeline temperature The sensing element 34 is also implemented by a single integrated temperature and pressure sensor, and a waterproof and dustproof structure with a high temperature resistant package is preferred.

As shown in FIG. 1 and FIG. 2, the active-engine internal combustion engine piston air pressure reduction device 100 according to the embodiment of the present invention further includes an intake-side check valve 5, which is disposed on the vent pipe 1 and is located in the vent pipe 1. The upstream side of the air inlet 21 of the oil and gas transmission pump 2 is used to prevent the extracted oil and gas from flowing back, and to ensure that the extracted oil and gas can no longer enter the crankcase C. In this embodiment, the inlet check valve 5 is an electronic check valve, which is electrically connected Connected to the control unit 4, and under the control of the control unit 4, the function of preventing oil and gas backflow is implemented. Preferably, the inlet-side check valve 5 is a water-proof and dust-proof structure that is resistant to high temperature and oil and gas colloid.

As shown in FIG. 1 and FIG. 2, an active internal combustion engine piston air pressure reduction device 100 according to an embodiment of the present invention further includes an air outlet check valve 6, which is disposed on the air pipe 1 and is located on the oil and gas. The downstream side of the outlet end 22 of the transmission pump 2 is used to prevent the extracted oil and gas from flowing back, and cooperates with the oil and gas transmission pump 2 in the pre-decompression stage, and is used as the post-decompression stage to increase the oil and gas transmission pump 2 The degree of vacuum. In this embodiment, the outlet-side check valve 6 is also an electronic check valve, which is electrically connected to the control unit 4 and operates under the control of the control unit 4. Preferably, the air outlet end check valve 6 is a water-proof and dust-proof structure which is resistant to high temperature and resistant to oil and gas colloid packaging.

As shown in FIG. 1 and FIG. 2, an active internal combustion engine piston air pressure reduction device 100 according to an embodiment of the present invention further includes an oil and gas filter 7 disposed on the air pipe 1 and located on the oil and gas transmission pump. The downstream side of the gas outlet 22 of Pu 2 is used to filter the extracted oil and gas to avoid environmental pollution caused by the direct discharge of oil and gas. Preferably, when the outlet-side check valve 6 is provided, the oil-gas filter 7 is located on the downstream side of the outlet-side check valve 6. In addition, in this embodiment, the oil and gas filter 7 is electrically connected to the control unit 4, and filtering is performed under the control of the control unit 4, and the control unit 4 is reported when the filtering function is abnormal.

As shown in FIG. 1 and FIG. 2, the active-engine internal combustion engine piston air pressure reduction device 100 according to the embodiment of the present invention further includes an air-tight bypass valve 8, which is bypass-connected to the air pipe 1 and is located in the air pipe 1. The upstream side of the air inlet end 21 of the oil and gas transmission pump 2, so that when necessary, oil and gas can flow out of the air pipe 1 through the airtight bypass valve 8 before entering the oil and gas transmission pump 2. Preferably, the air-tight bypass valve 8 is configured to be opened when the power is off, so that oil and gas can flow out through the air-tight bypass valve 8 to prevent the pressure of the internal combustion engine from continuously increasing and affecting normal operation. Moreover, when the intake side check valve 5 is provided Next, the air-tight bypass valve 8 is located on the upstream side of the intake-side check valve 5. In addition, in this embodiment, the air-tight bypass valve 8 is electrically connected to the control unit 4, and is opened or closed under the control of the control unit 4, so that the active internal combustion engine piston air pressure reduction device 100 When abnormal, the airtight bypass valve 8 is opened to release the pressure.

As shown in FIG. 1 and FIG. 2, the active-engine internal combustion engine piston air pressure reduction device 100 according to the embodiment of the present invention further includes an oil and gas filter 81 connected to the downstream side of the airtight bypass valve 8. The oil and gas flowing from the air-tight bypass valve 8 is filtered to avoid direct pollution of the oil and gas and cause environmental pollution.

As shown in FIGS. 1 and 2, the active-engine internal combustion engine piston air pressure reduction device 100 according to the embodiment of the present invention further includes an operation interface 9, and the operation interface 9 is provided with a manual switch 91. The operation interface 9 is electrically connected to the control unit 4 and is used to manually control the active internal combustion engine piston air pressure reduction device 100 through the control interface, for example, to perform parameter setting, calibration, restart, and stop operation. The manual switch 91 is used to manually close the active internal combustion engine piston air resistance decompression device 100 and close the vent pipe 1, thereby increasing the piston air resistance as an auxiliary brake to reduce the speed of the vehicle in emergency situations such as brake failure. effect.

With the above structure, the active internal combustion engine piston air pressure reduction device 100 of the present invention can timely exhaust the crankcase C according to the state of the crankcase C before the internal combustion engine is operated and whenever the compression operation is performed during the operation of the internal combustion engine. stress reliever. As a result, the resistance of the piston of the internal combustion engine during compression operation is reduced, so that the internal combustion engine can run more smoothly, and the energy conversion efficiency can be improved, thereby improving the performance of the internal combustion engine.

The above descriptions and descriptions are merely illustrations of the preferred embodiments of the present invention. Those with ordinary knowledge of this technology may make other modifications based on the scope of the patent application defined below and the above description, but these modifications should still be made. It is the spirit of the present invention and is within the scope of the present invention.

Claims (10)

An active internal combustion engine piston air resistance decompression device is applied to an internal combustion engine having a crankcase. The crankcase of the internal combustion engine is connected to a ventilation system. The ventilation system includes an intake pipe and an exhaust pipe. The active internal combustion engine piston air resistance decompression device includes: an air pipe connected to a crankcase of the internal combustion engine, the air pipe is independent of the ventilation system and is not connected to the intake pipe and the exhaust pipe; an oil and gas A transmission pump is disposed on the vent pipe, and one intake end of the oil and gas transmission pump is connected to the crankcase via the vent pipe; a state sensor includes a crankcase pressure sensing element for sensing Measure the pressure in the crankcase; a control unit, electrically connected to the status sensor and the oil and gas transmission pump, the control unit is set according to the sensing result of the status sensor, before the internal combustion engine runs and During the operation of the internal combustion engine, the oil and gas transmission pump is controlled to decompress the crankcase whenever the piston is compressed and actuated. The piston air resistance decompression device for an active internal combustion engine according to claim 1, wherein the state sensor further includes a crankcase temperature sensing element for sensing a temperature in the crankcase. The active-engine internal combustion engine piston air-blocking decompression device according to claim 1 or 2, wherein the state sensor further includes a pipeline pressure sensing element for sensing a pressure in the ventilation pipe. According to the active combustion engine piston air resistance decompression device according to claim 3, wherein the state sensor further includes a pipe temperature sensing element for sensing a temperature in the ventilation pipe. The active-engine piston air-blocking pressure reduction device according to claim 1, further comprising an intake-side check valve, which is disposed on the vent pipe and is located upstream of the intake end of the oil-gas transmission pump. The piston-type gas pressure reduction device for an active internal combustion engine according to claim 1, further comprising an outlet end check valve, which is disposed on the vent pipe and is located on a downstream side of the outlet end of the oil and gas transmission pump. The active-engine internal combustion engine piston air-blocking decompression device according to claim 1, further comprising an oil-gas filter, which is disposed on the vent pipe and is located on a downstream side of an air-outlet end of the oil-gas transmission pump. The active engine piston air-blocking pressure reduction device according to claim 1, further comprising an air-tight bypass valve, bypassed to the air pipe, and located on the upstream side of the intake end of the oil and gas transmission pump for supply. Oil and gas flows from the vent pipe through the airtight bypass valve. The active internal combustion engine piston air-blocking decompression device according to claim 8, further comprising an oil and gas filter connected to a downstream side of the air-tight bypass valve to filter oil and gas flowing from the air-tight bypass valve. The active internal combustion engine piston air pressure reducing device according to claim 1, further comprising a manual switch connected to the control unit, and closing the vent pipe by closing the active internal combustion engine piston air pressure reducing device.