TWM638697U - Air-cooled engine housing with engine oil temperature detection function - Google Patents

Abstract

An air-cooled engine casing with oil temperature sensing function, which includes a casing body and an oil temperature sensor, the casing body includes a cylinder head, a cylinder body, and The crankcase body at the bottom of one side, the engine oil chamber of the crankcase body is filled with oil, the oil temperature sensor is installed on the side of the lower part of the crankcase body and is electrically connected to the driving computer system, the oil temperature sensor of the oil temperature sensor The part extends into the engine oil chamber and is completely immersed in the engine oil. The oil temperature sensor can measure the oil temperature of the engine oil and transmit the measured oil temperature value to the driving computer system, and the oil temperature sensor is set far away from the cylinder. The position of the head eliminates the damage of the oil temperature sensor due to the temperature rise caused by combustion when the engine is running.

Description

Air-cooled engine case with oil temperature sensing

The present invention relates to an engine casing of a motor vehicle, in particular to an air-cooled engine casing with the function of sensing engine oil temperature.

The naturally air-cooled engine (naturally air-cooled engine) used by motor vehicles such as existing fuel locomotives mainly uses the flowing air produced when the motor vehicle is running to cool the engine. The faster the speed of the motor vehicle, the faster the flow rate of the flowing air passing through the surface of the empty engine can be increased, so that the cooling effect of the flowing air on the engine is better.

Among the currently known natural air-cooled engines (hereinafter referred to as air-cooled engines), in order to protect the engine and avoid damage to the air-cooled engine due to overheating, most of the known air-cooled engines are provided with oil temperature sensors. Measure the oil temperature in the engine, and transmit the measured oil temperature data to the driving computer system of the motor vehicle, so as to control the temperature of the engine, in order to protect the engine from overheating and prevent the oil temperature in the engine from rising. The lubricity of the engine oil to the parts in the engine becomes poor, which is not conducive to the lubrication of the engine parts.

The aforementioned measurement of the engine oil temperature, furthermore, for the fuel injection (EFI) type motor vehicle, in addition to protecting the engine from overheating, it is also possible to correct the fuel injection system to the engine in time according to the oil temperature. Therefore, the measurement signal of the engine oil temperature is a necessary and important measurement signal for the existing injection fuel supply type motor vehicles.

However, in the existing air-cooled engine, the oil temperature sensor is usually installed in the engine cylinder head, because the cylinder head of the air-cooled engine is not easy to dissipate heat, and the oil temperature sensor is close to the engine cylinder head, it is easy to cause the oil temperature measured by the oil temperature sensor Inaccurate question. In some usage conditions, it may cause problems such as damage to the oil temperature sensor. For example: when driving at a slow speed or continuously climbing a hill at low speed, due to the slow speed, the flow rate of the flowing air passing through the surface of the engine is slow, and the cooling effect is poor. The temperature sensor is damaged, and loses the proper oil temperature sensing function. For fuel injection (EFI) motor vehicles, in addition to the possible overheating of the engine, the fuel injection system cannot correct and control the amount of fuel injected to the engine according to the oil temperature due to the lack of measurement data of the oil temperature.

Furthermore, if the motor vehicle is running at idle speed for a long time, the lack of flowing air to cool the engine will cause the temperature of the engine cylinder head to rise, which may cause damage to the oil temperature sensor. In order to reduce the temperature of the cylinder head, when designing an air-cooled engine, the area of the cooling blades of the cylinder head must be enlarged. This will increase the volume of the engine cylinder head and take up space, which is not conducive to the engine being installed in the body of a motor vehicle . Therefore, on the basis of the volume of the original air-cooled engine, without enlarging the cooling fins, how to overcome the oil temperature sensor’s tendency to measure the temperature of the oil temperature sensor due to the slowing down of the air flowing through the surface of the engine, which causes the engine to heat up Problems such as inaccuracy and overheating damage are an important issue in the current air-cooled engine research and development.

The purpose of this model is to provide an air-cooled engine casing with oil temperature sensing function, which solves the problems of the existing air-cooled engine cylinder head that heat dissipation is not easy, resulting in inaccurate temperature measurement by the oil temperature sensor and easy overheating damage.

In order to achieve the above-mentioned purpose, the air-cooled engine casing with the oil temperature sensing function proposed by the present invention can be electrically connected to a driving computer system of a motor vehicle. The air-cooled engine casing includes: a casing body, which includes a cylinder head, a cylinder block located on one side of the cylinder head, and a crankcase body located below the side of the cylinder block away from the cylinder head, The outer surface of the peripheral wall of the crankcase body has a plurality of cooling fins, the crankcase body has an engine oil chamber, and the engine oil chamber is filled with engine oil; and An oil temperature sensor, which is installed on the lower side of the crankcase body and electrically connected to the driving computer system. The oil temperature sensor includes an oil temperature sensing part that can extend into the engine oil chamber. The temperature sensing part is completely immersed in the engine oil in the engine oil chamber and can measure the oil temperature of the engine oil, and can transmit the measured oil temperature of the engine oil to the driving computer system.

With the novelty of the aforementioned air-cooled engine casing, the temperature sensor is arranged on the lower side of the crankcase body below the casing body, and the temperature sensing part of the temperature sensor directly extends into the engine oil chamber and is completely immersed. Put it in the engine oil, so that the temperature sensor is located away from the cylinder head of the casing body, effectively eliminating the damage to the oil temperature sensor due to the temperature rise caused by combustion when the engine is running. In order to reduce the temperature of the cylinder head, the cooling fins of the casing are enlarged.

Furthermore, if the oil in the oil chamber is evaporated or lost, the oil temperature sensing part of the oil temperature sensor is not completely immersed in the oil and exposed outside the oil, so that the oil temperature sensing part will not be able to accurately measure the temperature due to contact with air. The oil temperature of the engine oil, and then the trip computer system judges that the oil temperature of the engine oil is abnormal and lights up a warning light.

As shown in FIG. 1 and FIG. 2 , it discloses a partial cross-sectional schematic diagram of a preferred embodiment of the novel air-cooled engine casing. The air-cooled engine casing is used to install a driving mechanism of an engine, and the driving mechanism includes a piston assembly and a crankshaft assembly.

As shown in FIGS. 1 and 2 , the air-cooled engine casing includes a casing body 10 and an oil temperature sensor 20 . The casing body 10 includes a cylinder head 10A, a cylinder body 10B and a crankcase body 10C, the cylinder body 10B is arranged on one side of the cylinder head 10A, and the cylinder body 10B is Used to install the piston assembly, the crankcase body 10C is located below the side of the cylinder block 10B away from the cylinder head 10A, and has an oil chamber 100, and the piston assembly can extend to the oil chamber 100 Inside, the engine oil chamber 100 is used to install the crankshaft assembly connected to the piston assembly, and the outer surface of the peripheral wall of the crankcase body 10C has a plurality of cooling fins.

As shown in Figures 1 and 2, the machine oil chamber 100 of the casing body 10 is equipped with an engine oil 101, and the casing body 10 is installed with an engine oil 101 extending into the engine oil chamber 100 to measure the liquid level of the engine oil 101. Ruler (not shown), the engine oil 101 ruler is a known object, and the engine oil 101 ruler has a liquid level marking section that can extend into the oil chamber 100, and the liquid level marking section is sequentially set with a machine oil 101 from bottom to top. The lower limit and the upper limit of a machine oil 101, the middle position between the upper limit of the machine oil 101 and the lower limit of the machine oil 101 is defined as the middle limit of a machine oil 101, the liquid level height of the machine oil 101 filled in the machine oil chamber 100 is higher than the lower limit of the machine oil 101 and lower than the lower limit of the machine oil 101 cap.

As shown in Figures 1 and 2, the crankcase body 10C has an oil chamber bottom plate 12 located at the bottom of the oil chamber 100, and a longitudinal side wall 11 located at the periphery of the oil chamber 100 and connected to the oil chamber bottom plate 12. The cooling fins 13 are disposed on the outer peripheral surface of the oil chamber bottom plate 12 and the outer peripheral surface of the longitudinal sidewall 11 .

As shown in Figures 1 and 2, the oil temperature sensor 20 is installed on the lower side of the crankcase body 10C of the casing body 10 and extends into the oil chamber 100, whereby the air-cooled The type engine casing has the oil temperature sensing function. The oil temperature sensor 20 can be electrically connected to the driving computer system (Engine Control Unit, ECU) of the meter control mechanism of the motor vehicle. Preferably, the oil temperature sensor 20 is located at the lower section of the crankcase body 10C away from the cylinder head 10A, so as to reduce the influence of the temperature of the cylinder head 10A on the oil temperature sensor 20 . The oil temperature sensor 20 includes an oil temperature sensing part 21, which is completely immersed in the engine oil 101 of the engine oil chamber 100, and can measure the temperature of the engine oil 101, and transmit the oil temperature value of the engine oil 101 To the driving computer system (Engine Control Unit, ECU) of the instrument control mechanism, the driving computer system (ECU) is equipped with an oil temperature control program and the safe value range of oil temperature is set in the database, so that the driving computer system (ECU) The oil temperature value of the engine oil 101 detected by the oil temperature sensor 20 is judged. The computer system (ECU) can make the instrument control mechanism light up the warning light.

In this preferred embodiment, the oil temperature sensor 20 is sealed and transversely installed in the longitudinal side wall 11 of the crankcase body 10C, and the oil temperature sensor 21 extends into the engine oil chamber through the longitudinal side wall 11 Within 100, preferably, the height of the oil temperature sensing part 21 is higher than the lower limit of the engine oil 101 and lower than the middle limit of the engine oil 101.

With the above-mentioned new air-cooled engine casing with oil temperature sensing function, when it is applied to the air-cooled engine of motor vehicles such as fuel-powered locomotives, the flowing air generated when the motor vehicle is running can cool the air-cooled engine casing and Cool down the engine. At the same time, the oil temperature sensor 20 is mounted on the crankcase body 10C of the air-cooled engine casing away from the cylinder head 10A, and the oil temperature sensor 21 of the oil temperature sensor 20 extends into the oil chamber 100 to completely Immersed in the engine oil 101, so that the oil temperature sensor 20 can accurately sense the oil temperature of the engine oil 101, and the oil temperature sensor 20 is arranged at a position away from the cylinder head 10A, so it can effectively eliminate the combustion caused by the engine during operation. In case the oil temperature sensor 20 is damaged due to temperature rise, there is no need to expand the heat dissipation fins 13 of the casing in order to reduce the cylinder temperature.

As shown in Figure 3, if the engine oil 101 in the engine oil chamber 100 is evaporated or lost and the liquid level of the engine oil 101 is lower than the lower limit of the engine oil 101, the oil temperature sensing part 21 of the oil temperature sensor 20 is not completely immersed in the engine oil 101 And outside the exposed engine oil 101, at this time, the oil temperature sensing part 21 can not accurately measure the oil temperature of the engine oil 101 due to contact with air, so that the driving computer system (ECU) judges that the oil temperature value of the engine oil 101 is abnormal, and the instrument will control The agency lights up to warn.

Furthermore, the oil temperature sensor 20 can accurately perceive the oil temperature of the engine oil 101, and can measure the oil temperature value of the engine oil 101 and send it to the driving computer system (ECU), which is monitored by the driving computer system (ECU). The oil temperature of engine oil 101 changes. When the oil temperature of engine oil 101 exceeds the safe range of oil temperature, the driving computer system (ECU) can light up a warning light to remind the user to deal with it immediately, reducing the damage rate of the engine due to overheating. For fuel injection (EFI) type motor vehicles, the fuel injection quantity to the engine can be corrected and controlled by the driving computer system (ECU) according to the measurement data of the oil temperature of the engine oil 101 .

10: Case body 10A: cylinder head 10B: Cylinder block 10C: crankcase body 100: engine oil room 101: engine oil 11: Longitudinal side wall 12: Bottom plate of oil chamber 13: cooling fins 20: Oil temperature sensor 21: Oil temperature sensing part

Fig. 1 is a schematic side view plan view of a preferred embodiment of the novel air-cooled engine case. FIG. 2 is a schematic cross-sectional view of a preferred embodiment of the air-cooled engine casing shown in FIG. 1 . Fig. 3 is a preferred embodiment of the air-cooled engine casing shown in Fig. 1 and Fig. 2. When the oil level in the oil chamber is lower than the lower limit of the oil, the oil temperature sensing part of the oil temperature sensor is not completely immersed in the oil state. schematic diagram.

10C: crankcase body

100: engine oil room

101: engine oil

11: Longitudinal side wall

12: Bottom plate of oil chamber

13: cooling fins

20: Oil temperature sensor

21: Oil temperature sensing part

Claims (3)

An air-cooled engine casing with oil temperature sensing function, which can be electrically connected to a driving computer system of a motor vehicle, the air-cooled engine casing includes: A casing body, which includes a cylinder head, a cylinder block located on one side of the cylinder head, and a crankcase body located below the cylinder block on a side away from the cylinder head, the The outer surface of the peripheral wall of the crankcase body has a plurality of cooling fins, the crankcase body has an oil chamber, and the oil chamber is filled with oil; and An oil temperature sensor, which is installed on the lower side of the crankcase body and electrically connected to the driving computer system. The oil temperature sensor includes an oil temperature sensing part that can extend into the engine oil chamber. The temperature sensing part is completely immersed in the engine oil in the engine oil chamber and can measure the oil temperature of the engine oil, and can transmit the measured oil temperature of the engine oil to the driving computer system. The air-cooled engine casing with oil temperature sensing function as described in claim 1, wherein the crankcase body has an oil chamber bottom plate located at the bottom of the oil chamber and an oil chamber bottom plate located at the periphery of the oil chamber and connected to the oil chamber bottom plate A longitudinal side wall, the plurality of cooling fins are arranged on the outer peripheral surface of the bottom plate of the oil chamber and the outer peripheral surface of the longitudinal side wall, and the oil temperature sensor is sealed and transversely installed in the longitudinal side wall. The air-cooled engine casing with engine oil temperature sensing function as described in claim 1 or 2, wherein, the crankcase body is provided with an engine oil dipstick that can extend into the engine oil chamber to measure the level of the engine oil, the engine oil The ruler has a liquid level marking section that can extend into the oil chamber, and the liquid level marking section is sequentially set with a lower oil limit and an upper oil limit from bottom to top, and the middle position between the upper oil limit and the lower oil limit is defined as a The middle limit of engine oil, the liquid level of the engine oil filled in the engine oil chamber is higher than the lower limit of engine oil and lower than the upper limit of engine oil; the height position of the oil temperature sensing part of the oil temperature sensor is higher than the lower limit of engine oil and lower than the upper limit of engine oil Oil limit.

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