CN104074569A - Lubrication system applied to undergraduate formula car engine - Google Patents

Abstract

The invention discloses a lubricating system applied to the engine of a student formula racing car, comprising a new type oil pan detachably arranged at the bottom of the engine, a filter with one end placed in the new type oil pan and the other end connected to the oil pump. And the oil pan baffle arranged between the new oil pan and the engine. The invention can effectively reduce the installation position of the engine by setting a new type of oil pan, lower the center of gravity of the whole vehicle, and improve the handling performance of the racing car. Installing a newly designed filter can not only meet the requirements of the new lubrication system, but also make necessary adjustments to meet different situations, so as to ensure that the engine’s lubrication system can still work normally when the working conditions of the racing car change drastically, reducing the risk of poor lubrication damage to the engine.

Description

A lubrication system applied to the engine of Formula Student racing car

technical field

The invention relates to a racing engine lubricating system, in particular to a lubricating system applied to an engine of a student formula racing car.

Background technique

Formula Student China (FSC for short) is an automobile design and manufacturing competition organized by students majoring in automobile engineering or automobile related majors in colleges and universities. Competing vehicles are tested in a series of static and dynamic items, including: technical inspection, production cost analysis, marketing report, racing design, individual performance tests and good track durability. The GAC S-Power team of South China University of Technology has participated in four Chinese Student Formula competitions since its establishment in 2009. As shown in Figure 1, we used the Kawasaki ZX-6R 07 engine for this competition. This is a An engine originally installed on a motorcycle.

The original oil pan of Kawasaki ZX-6R 07 is V-shaped, which is designed to avoid oil shortage in the engine lubrication system when the motorcycle is cornering. However, motorcycle riders can tilt the motorcycle at a certain angle when cornering to offset the influence of lateral acceleration on the oil sloshing, but our four-wheeled racing cars cannot, so we must consider a way to reduce The effect of poor lubrication caused by the sloshing of lubricating oil.

For the FSAE racing car, after the height of the center of mass of the whole car is lowered, the axle load transfer of the mass will be reduced during the acceleration, braking and turning of the car, so that the adhesion provided by the tires will increase, thereby improving the vehicle's performance. Handling performance. Therefore, reducing the center of gravity of the vehicle through the height of the oil pan can have a great impact on the handling performance of the vehicle.

The main significance of the present invention is to reduce the installation height of the engine by changing the height and shape of the engine oil pan, thereby reducing the height of the center of mass of the vehicle. At the same time, it ensures that the lubrication system of the engine can still work normally when the working conditions of the racing car change drastically, reducing the damage to the engine caused by poor lubrication.

Contents of the invention

Based on the existing technology, the present invention aims at the deficiencies of the existing oil pan, and designs the form of the oil pan used for the lubrication system of the college student formula competition. The invention can realize: effectively reducing the installation height of the engine so as to reduce the height of the center of mass of the vehicle to achieve better maneuverability of the racing car, and ensure the effective operation of the lubrication system of the racing car under various working conditions.

In order to achieve the above tasks, the patent of the present invention adopts the following technical solutions to achieve:

A lubricating system applied to the engine of a Formula Student racing car, including a new type oil pan detachably arranged at the bottom of the generator, a filter with one end placed in the new type oil pan and the other end connected to the oil pump, the new type The height of the oil pan is 45mm-50mm, including an integrally formed surrounding wall and a flat bottom surface of the new oil pan, and the installation end surface of the new oil pan and the engine is uniformly provided with pan mounting holes and positioning pin holes;

The filter includes the upper joint of the filter, the oil inlet pipe of the filter, the upper plate of the lower end of the filter, and the lower plate of the lower end of the filter. After the upper plate of the lower end of the filter and the lower plate of the lower end of the filter are fastened, bolts are set in the M4 through hole The lower end of the oil inlet pipe of the filter collector is a beveled surface and is welded to the upper plate of the lower end of the filter collector. One end of the upper joint of the filter collector is connected to the upper end of the oil inlet pipe of the filter collector through an internal thread, and the other end is connected to the upper end of the oil inlet pipe of the filter collector. The port is connected with the oil pump;

An oil pan baffle is also arranged between the new oil pan and the engine, and the oil pan baffle is provided with mounting holes along the edge, and a filter passage groove is arranged in the middle of the oil pan baffle, and the An oil return hole is arranged between the filter passing groove and the installation hole.

Further, the oil inlet pipe of the filter collector is also provided with a lock nut for locking the upper joint of the filter collector.

Further, a filter screen is also arranged between the upper plate at the lower end of the filter collector and the lower plate at the lower end of the filter collector.

Further, the thickness of the oil pan baffle is 1mm-3mm

Further, the new oil pan is also provided with an oil discharge bolt hole and an oil temperature sensor installation hole. For the oil discharge bolt hole and the oil temperature sensor installation hole, the former is for the purpose of removing the oil pan without dismantling the entire oil pan. The latter is to monitor the temperature of the engine oil when the engine is running, so as to judge the working condition of the engine.

The new oil sump is processed by three-dimensional modeling and numerical control machining, so some relevant parameters need to be measured to establish a three-dimensional model. For the installation plane of the oil pan, since the oil pan is installed on the crankcase of the engine, it is both a seal and a fastener, so the position accuracy of the installation hole and the surface accuracy of the installation plane are required to be high. In order to design and process a new type of oil pan, it is necessary to use an ATOS optical scanner and a three-coordinate measuring instrument to accurately measure the outer contour parameters of the original oil pan and the coordinates of the installation hole and the center of the pin hole on the installation plane to ensure installation The accuracy of plane processing avoids oil leakage caused by parameter errors; for the new oil pan, the height is minimized while ensuring that its volume is greater than or equal to the volume of the original oil pan, so the overall shape is relatively flat; The oil pan baffle is mainly to limit the movement of the oil stored in the oil pan, so that most of the oil can be kept in the oil under various extreme working conditions (such as rapid acceleration, sudden braking and high-speed cornering). In the bottom shell, prevent the occurrence of oil shortage in the filter. The oil pan baffle is installed between the new oil pan and the crankcase of the engine. It is designed to ensure the normal operation of the lubrication system after the height of the oil pan is reduced. The oil pan baffle has the following functions: it can effectively prevent the oil in the new oil pan from moving toward the crankcase of the engine; an oil return hole is set on the oil pan baffle to make the oil returning to the engine fall back normally To the oil pan; can make the filter work normally; the oil pan baffle is installed between the engine crankcase and the oil pan, and can maintain good fastening and sealing. The oil pan baffle is based on the installation plane size and the center positioning of the installation hole, and the three-dimensional modeling is carried out, and finally the machining is completed by the CNC machine tool.

Since the height of the new oil pan is lower than that of the original oil pan, the original filter installed at the bottom of the engine is no longer applicable, and a new modified filter needs to be designed and processed. Connect the upper connector of the filter to the oil inlet of the oil pump, and its size should be consistent with that of the original filter. Only in this way can it be ensured that a good seal can be maintained with the oil inlet after the sealing ring is installed. Therefore, the establishment of the model needs to measure the size of the original filter, and the relevant size of the original filter joint can be measured by using a vernier caliper. Through these dimensions, the model of the upper joint of the filter can be successfully established, and at the same time, the upper joint of the filter is connected with the next component (ie, the oil inlet pipe of the filter) using threads, and the inner thread is designed at the lower end of the upper joint of the filter. The main function of the lock nut is to lock the threaded connection between the upper joint of the filter and the oil inlet pipe of the filter, and at the same time, the height of the filter can be adjusted to facilitate the installation of the new oil pan. The inner diameter of the filter oil inlet pipe should be the same as that of the original filter to ensure a constant flow rate of the oil supply pump. The external thread is designed at the connection between the oil inlet pipe of the filter and the upper joint of the filter, so that the two can be tightly matched through the lock nut. The lower end of the oil inlet pipe of the filter collector is designed as a beveled surface, so that the bottom of the filter collector is parallel to the bottom of the oil pan. The upper plate at the lower end of the filter is welded to the oil inlet pipe of the filter, and three through holes with a diameter of 4mm are designed on the plate to facilitate the connection with the lower plate at the lower end of the filter with bolts. The lower plate at the lower end of the filter and the upper plate at the lower end of the filter are connected by M4 bolts using preset torque nuts, which have the effect of preventing loosening when subjected to vibration. The space for placing the filter screen is also designed in the lower plate. When the assembly is completed, the filter screen will be fixed in the middle of the upper and lower plates. The distance between the bottom of the modified filter collector and the oil pan can be adjusted by adding gaskets on the M4 bolts to achieve the best oil suction space.

The beneficial effects of the present invention are as follows:

1. The height of the oil pan has been effectively reduced. The height of the original oil pan is 91.715mm. The new oil pan lowers the installation height of the engine by about 40mm. Since the weight of the engine accounts for a large proportion of the weight of the vehicle, it is equivalent to reducing the height of the center of mass of the vehicle by about 10mm, which significantly improves the handling stability of the vehicle;

2. Through the function of the oil pan baffle, it is ensured that the bottom filter of the racing car can absorb the oil and the lubrication system can work normally under various extreme working conditions;

3. Use ATOS optical scanner and three-coordinate measuring instrument to measure the parameters of the original oil pan, and then carry out three-dimensional modeling and numerical control processing to ensure that the installation plane size of the oil pan is accurate and avoid oil leakage;

4. The newly designed filter can be adjusted to meet the working requirements of the new oil pan.

Description of drawings

Figure 1 is a diagram of the lubricating oil circuit inside the Kawasaki ZX-6R 07 engine.

Fig. 2 is a schematic structural view of a novel oil pan according to an embodiment of the present invention.

Fig. 3 is a schematic structural view of an oil pan baffle according to an embodiment of the present invention.

Fig. 4 is a schematic diagram of the assembly structure of the filter collector according to the embodiment of the present invention.

Fig. 5 is an exploded schematic view of a filter according to an embodiment of the present invention.

In the figure 1. Camshaft lubricating oil circuit, 2. Exhaust camshaft, 3. Oil filter, 4. Oil cooler, 5. Intake camshaft, 6. Oil pump, 7. New oil pan, 8 . Bottom shell installation hole, 9. Locating pin hole, 10. Installation plane, 11. Bottom surface of new oil pan, 12. Partition plate installation hole, 13. Filter through groove, 14. Oil return hole, 15. Oil pump connection 16. Filter collector, 17. M4 through hole, 18. Filter upper connector, 19. Lock nut, 20. Filter oil inlet pipe, 21. Upper plate at the lower end of the filter, 22. Lower plate at the lower end of the filter.

Detailed ways

The purpose of the invention of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, and the embodiments cannot be repeated here one by one, but the implementation of the present invention is not therefore limited to the following embodiments.

In Fig. 1, the internal lubricating oil circuit diagram of the existing Kawasaki ZX-6R 07 engine is shown. The oil is first stored in the oil pan. When the upper part of the engine moves, the lubricating oil first passes through the oil filter 3 and the oil cooler 4 to filter and cool down, then enters the main oil passage, distributes the oil to the gearbox and crankshaft bearings for lubrication, and finally transmits it upwards to the camshaft for lubrication In the oil passage 1, the exhaust camshaft 2 and the intake camshaft 5 are lubricated. After lubrication, the oil will fall back into the oil pan due to gravity, ready for a new round of lubrication cycle.

This embodiment is shown in Figure 2-5, a kind of lubricating system applied to the engine of Formula Student racing car, comprises the novel oil sump 7 that is detachably arranged at the bottom of the generator, one end is placed in the novel oil sump 7 and the other One end of the filter 16 connected to the oil pump 6, the height of the new oil pan 7 is 45mm-50mm, the height of this embodiment is 50mm, and can also be set to 45mm or 48mm according to needs, the new oil pan 7 Including an integrally formed surrounding wall and a flat new oil pan bottom surface 11, the new oil pan 7 and the engine mounting end surface 10 are uniformly provided with pan mounting holes 8 and positioning pin holes 9;

The filter 16 includes an upper joint 18 of the filter, an oil inlet pipe 20 of the filter, an upper plate 21 at the lower end of the filter, a lower plate 22 at the lower end of the filter, and the upper plate 21 at the lower end of the filter and the lower plate 22 at the lower end of the filter Bolts are set in the M4 through hole 17 to connect, the lower end of the oil inlet pipe 20 of the filter collector is a chamfered surface and welded on the upper plate 21 at the lower end of the filter collector, and one end of the upper joint 18 of the filter collector is connected to the filter filter through an internal thread. The upper ends of the oil pipe 20 are connected, and the other end is connected with the oil pump 6 through the oil pump connection port;

An oil pan baffle is also arranged between the new oil pan 7 and the engine, and the oil pan baffle is provided with partition installation holes 12 along the edge, and the middle part of the oil pan baffle is provided with a filter through which Groove 13, the oil return hole 14 is arranged between the filter collector passing through the groove 13 and the mounting hole 12 of the partition plate.

The oil inlet pipe 20 of the filter collector is also provided with a locking nut 19 for locking the upper joint 18 of the filter collector.

A filter screen is also arranged between the upper plate 21 at the lower end of the filter collector and the lower plate 22 at the lower end of the filter collector.

The thickness of the oil pan baffle in this embodiment is 2 mm, and the thickness can also be set to 1 mm or 3 mm as required.

The novel oil pan 7 is also provided with an oil discharge bolt hole and an oil temperature sensor partition mounting hole, which is convenient for discharging engine oil and detecting engine oil temperature.

As shown in Figure 2, the profile on the mounting plane 10 of the new oil pan 7, the pan mounting holes 8 and the positioning pin holes 9 are consistent with the original oil pan, and can be better installed on the crankcase of the engine And ensure that the oil does not leak. The new oil pan bottom surface 11 of the new oil pan 7 is flat, and when the engine is positioned, try to ensure that the new oil pan bottom surface 11 is kept level with the ground. Through comparison, it can be found that the new oil pan 7 is relatively low compared to the original oil pan, which can lower the position where the engine is installed on the frame, and at the same time lower the center of gravity of the vehicle. But at this time, the phenomenon of poor lubrication caused by the oil sloshing of the engine under severe working conditions cannot be eliminated, so it is necessary to install an oil pan baffle.

In Fig. 3, the structural diagram of the oil sump baffle is shown. There is a filter through the groove 13 for the normal installation of the filter, and an oil return hole 14 is opened for the oil in the internal oil circuit of the engine to fall back to the new oil. In the bottom case 7. The outline of the oil pan baffle, the mounting holes of the bulkhead and the pin holes are consistent with the installation plane of the new oil pan 7. The thickness of the baffle is only 2mm. Due to the change of the height of the new oil pan 7, the original filter is no longer applicable, so a new filter needs to be redesigned.

As shown in FIG. 4 and FIG. 5 , the oil pump connection port 15 is connected to the oil inlet port of the oil pump 6 , and the oil seal between the two must be ensured. The upper plate 21 at the lower end of the filter is connected with the lower plate 22 at the lower end of the filter by M4 bolts and preset torque locknuts, and the height of the filter from the bottom surface 11 of the new oil pan can be adjusted by using gaskets. The oil inlet pipe 20 of the filter collector is welded together with the upper plate of the lower end of the filter collector, and then connected with the upper joint 18 of the filter collector by a lock nut, and the height of the filter collector 16 can be adjusted at the lock nut 19 to meet the installation requirements. Finally, a filter screen is placed between the upper plate 21 at the lower end of the filter and the lower plate 22 at the lower end of the filter to filter impurities of larger particles inside the oil.

When the racing car is cornering at high speed, it will be subjected to a large acceleration in the lateral direction. At this time, the lubricating oil at the bottom of the new oil pan starts to move outward in the direction of the turning due to the inertial force. When there is no action of the oil pan baffle, the oil level may be lower than the oil suction level of the filter 16, resulting in insufficient lubricating oil supply to the main parts inside the engine for lubrication, and in severe cases, bearing bush burning may occur , Engine scuffing and other issues. When the oil pan baffle is installed, the oil starts to move sideways under high-speed cornering conditions. At this time, due to the barrier of the oil pan baffle, the lubricating oil can be better kept in the new oil pan , to avoid the phenomenon of lack of oil in the lubrication system.

The above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (5)

1. a lubrication system that is applied to university student's equation motorcycle race motor, comprise the fuel filter (16) that Novel oil pan (7), one end of being arranged on removably engine bottom are placed in Novel oil pan (7) and the other end is connected with oil pump (6), it is characterized in that: described Novel oil pan (7) is highly 45mm-50mm, the leg and the planar Novel oil pan bottom surface (11) that comprise integral molding, on the installation end face (10) of described Novel oil pan (7) and motor, be evenly provided with drain pan mounting hole (8), positioning pin hole (9);

Described fuel filter (16) comprises fuel filter upper connection (18), fuel filter oil inlet pipe (20), fuel filter lower end upper plate (21), fuel filter lower end lower plate (22), described fuel filter lower end upper plate (21) arranges bolt after fastening with fuel filter lower end lower plate (22) and is connected in M4 through hole (17), described fuel filter oil inlet pipe (20) lower end surface is scarf and is welded on described fuel filter lower end upper plate (21), described fuel filter upper connection (18) one end is connected with fuel filter oil inlet pipe (20) upper end by internal thread, the other end is connected with oil pump (6) by oil pump connection mouth (15),

Between described Novel oil pan (7) and motor, be also provided with oil sump baffle plate, described oil sump baffle plate is provided with mounting hole (12) along edge, described oil sump baffle plate middle part is provided with fuel filter by groove (13), and described fuel filter is by being provided with spill port (14) between groove (13) and mounting hole (12).

2. the lubrication system that is applied to university student's equation motorcycle race motor according to claim 1, is characterized in that: on described fuel filter oil inlet pipe (20), be also provided with the locking nut (19) for locking fuel filter upper connection (18).

3. the lubrication system that is applied to university student's equation motorcycle race motor according to claim 1, is characterized in that: between described fuel filter lower end upper plate (21) and fuel filter lower end lower plate (22), be also provided with filter screen.

4. the lubrication system that is applied to university student's equation motorcycle race motor according to claim 1, is characterized in that: the thickness of described oil sump baffle plate is 1 mm-3mm.

5. according to the lubrication system that is applied to university student's equation motorcycle race motor described in claim 1 to 4 any one, it is characterized in that: on described Novel oil pan (7), be also provided with oil discharge screw hole, oil temperature sensor mounting hole.