CN113147368B - Universal oil line interface arrangement method compatible with different inclination angle architectures - Google Patents
Universal oil line interface arrangement method compatible with different inclination angle architectures Download PDFInfo
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- CN113147368B CN113147368B CN202110255572.4A CN202110255572A CN113147368B CN 113147368 B CN113147368 B CN 113147368B CN 202110255572 A CN202110255572 A CN 202110255572A CN 113147368 B CN113147368 B CN 113147368B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Abstract
The invention discloses a general oil way interface arrangement method compatible with different inclination angle architectures, which comprises the following steps: a plurality of oil inlet pipes are arranged above the central axis of the motor, a plurality of oil return pipes are arranged below the central axis of the motor, each oil inlet pipe corresponds to one oil return pipe, and each oil inlet pipe is provided with a stop valve; arranging a tilt sensing device in the automobile; acquiring left and right inclination information of the automobile detected by an inclination sensing device; acquiring the current running speed, gear state information and an accelerator pedal state of the automobile; calculating the inclination angle of the automobile according to the inclination information of the left and right automobiles, the current running speed of the automobile, the gear state information and the state of an accelerator pedal; opening a corresponding stop valve according to the inclination angle of the automobile, and setting an oil circuit loop; according to the invention, under the condition that the mechanical structure of the main body core part is not changed, the inclination angle condition of the automobile is detected through the inclination sensing device, the corresponding oil circuit arrangement is carried out, and the oil circuit circulation efficiency is improved.
Description
Technical Field
The invention relates to the technical field of automobile engines, in particular to a general oil way interface arrangement method compatible with different inclination angle architectures.
Background
An electric drive power system generally comprises three core modules, namely a motor, a speed reducer and a controller. An architectural layout that a reducer shafting is horizontally arranged and a controller is horizontally arranged is generally adopted. The available space of a user of the electric automobile becomes a selling point of product market competition, the structural layout requirement of the whole automobile is more compact, and the space of an electric driving power system around the whole automobile is very small; meanwhile, in order to avoid other part structures of the whole vehicle or meet the layout requirement of the whole vehicle, the layout of the electric drive power system is inclined at a certain angle in accordance with the layout requirement of the whole vehicle, and the purpose of efficiently utilizing the space of the whole vehicle is achieved. In addition, a plurality of core electronic components (such as IGBTs, circuit boards and the like) are arranged in the controller, and due to the inherent structural characteristics of the electronic components, the horizontal arrangement is more favorable for protecting the electronic components under the working environment that the whole vehicle is frequently shocked and impacted, and the high reliability is ensured.
In the oil cold electricity drives system, advance oil pipe way and return oil pipe way and be the key characteristic of motor module and reduction gear module interface, can receive the influence of gravity by with oil circulating system and produce the potential energy difference influence, advance oil pipe way interface and arrange in the eminence, return oil pipe and arrange in the low department. When the arrangement inclination angle of the electric drive assembly is changed, the high positions of the oil inlet pipe and the oil return pipe are changed, so that the circulation effect of the oil circuit circulation system is influenced.
For example, chinese patent application No. CN201910330496.1, filed 2019, 04/23/h discloses a built-in oil inlet structure of an air compressor for a vehicle, which includes an air compressor, an engine cylinder, an oil inlet pipe assembly and an air compressor oil inlet channel, wherein the air compressor is installed on an engine end plate, the engine cylinder is provided with an engine cylinder oil passage, and the built-in oil inlet structure is characterized in that: the oil inlet pipe assembly is arranged in a gear chamber of an engine end plate, an oil inlet channel of the air compressor is installed on the end face of the air compressor, and the oil inlet pipe assembly is communicated with the oil inlet channel of the air compressor. Although the oil inlet structure of this application has strengthened the leakproofness, in case the car takes place that the inclination changes and leads to the electricity to drive the assembly and arrange the inclination and change, advance oil pipe and return oil pipe's high position and can change, its oil circuit circulation efficiency still can receive the influence.
Disclosure of Invention
The invention mainly solves the problem that the arrangement inclination angle of the electric drive assembly in the prior art is changed to cause the reduction of the oil circuit circulation efficiency; the general oil way interface arrangement method compatible with different inclination angle architectures is provided, and under the condition that the interface structure is not changed, the general oil way interface arrangement method compatible with different inclination angle architectures is compatible, and the oil way circulation efficiency is improved.
The technical problem of the invention is mainly solved by the following technical scheme: a general oil way interface arrangement method compatible with different dip angle architectures comprises the following steps: a plurality of oil inlet pipes are arranged above the central axis of the motor, a plurality of oil return pipes are arranged below the central axis of the motor, each oil inlet pipe corresponds to one oil return pipe, and each oil inlet pipe is provided with a stop valve; arranging a tilt sensing device in the automobile; acquiring left and right inclination information of the automobile detected by an inclination sensing device; acquiring the current running speed, gear state information and an accelerator pedal state of the automobile; calculating the inclination angle of the automobile according to the inclination information of the left automobile and the right automobile, the current running speed of the automobile, the gear state information and the state of an accelerator pedal; and opening a corresponding stop valve according to the inclination angle of the automobile, and setting an oil circuit loop. The left and right inclination states of the automobile are detected through the inclination sensing device, the front and back inclination states of the automobile are calculated through the current running speed, gear state information and the accelerator pedal state of the automobile, the inclination angle of the automobile is obtained, no matter whether an electric drive power system is horizontally placed left and right or obliquely placed or horizontally installed front and back, the oil circuit can be optimally arranged through the opening and closing of the stop valve, the oil outlet flow of the oil inlet pipe and the oil outlet return flow of the oil outlet pipe are enabled to be maximum, and the oil circuit circulation efficiency is improved.
Preferably, the inclination sensing device comprises a base body, an MCU (microprogrammed control Unit), a first spring, a second spring, an upper polar plate, a first lower polar plate and a second lower polar plate, wherein the first end of the first spring is fixedly connected with the inner wall of the base body, the second end of the first spring is connected with one end of the upper polar plate, the other end of the upper polar plate is connected with the first end of the second spring, the second end of the second spring is fixedly connected with the inner wall of the base body, the first lower polar plate is installed on the left side of the bottom of the base body, the second lower polar plate is installed on the right side of the bottom of the base body, the upper polar plate is projected to the bottom of the base body and is tightly connected with the first lower polar plate and the second lower polar plate, and the upper polar plate, the first lower polar plate and the second lower polar plate are all connected with the MCU. The air is filled in the matrix, the air medium, the upper polar plate and the first lower polar plate form a first capacitor, the upper polar plate, the air medium and the second lower polar plate form a second capacitor, when the automobile runs horizontally, the upper polar plate does not deflect, the corresponding areas of the upper polar plate, the first lower polar plate and the second lower polar plate are 0, the sizes of the first capacitor and the second capacitor are 0, when the automobile deflects, if the left side of the automobile is raised, the upper polar plate is influenced by self gravity, and deflects rightwards, the upper polar plate and the second lower polar plate generate capacitance values, the first capacitor generates capacitance values, and the angle deflection size of the automobile is judged according to the capacitance values of the first capacitor; if the right side is raised, the upper polar plate wants left skew, then the second electric capacity produces the capacitance value, judges the angle skew size of car according to the capacitance value size of second electric capacity, whether the left side is raised or the right side is raised according to whether first electric capacity or second electric capacity produce the capacitance value judgement car.
Preferably, the method for calculating the inclination angle of the automobile comprises the following steps:
s21: calculating the front and rear inclination angles of the automobile according to the current running speed of the automobile, gear state information and the state of an accelerator pedal;
s22: acquiring left and right inclination angles of the automobile according to the left and right inclination information of the automobile;
s23: and opening corresponding stop valves according to the front and rear inclination angles and the left and right inclination angles of the automobile, and setting an oil circuit loop. Through the front and back inclination angle of the automobile and the left and right inclination angle of the automobile, the optimal oil circuit circulation angle can be found even when the electric drive power system is installed.
Preferably, the front and rear inclination angle theta of the automobile1The calculation formula of (A) is as follows:
wherein m represents the mass of the automobile, g represents the acceleration of gravity, a represents the acceleration of the automobile, mu represents the friction coefficient of the automobile and the ground, and f represents the air resistance. And calculating the front and rear inclination angles of the automobile according to Newton's law.
Preferably, the front and rear inclination of the vehicle includes an uphill condition, a level driving condition and a downhill condition, and the determination method of the uphill condition, the level driving condition and the downhill condition of the vehicle is as follows: the method comprises the steps that a first speed, a second speed and a third speed of an automobile are preset, the gear of the automobile is unchanged, when an accelerator pedal of the automobile is reset to 0 from a certain opening degree, if the automobile is accelerated to the first speed from the current speed within a preset time t, the automobile is in an uphill state, if the automobile is accelerated to the second speed from the current speed within the preset time t, the automobile is in a horizontal driving state, and if the automobile is accelerated to the third speed from the current speed within the preset time t, the automobile is in a downhill state.
Preferably, the vehicle acceleration a is calculated from an uphill condition, a level driving condition and a downhill condition of the vehicle, respectively. Under different states, the automobile has different automobile accelerations, and the automobile can also have the same automobile acceleration under different states.
Preferably, the elastic potential energy of the first spring and the elastic potential energy of the second spring are both smaller than the gravitational potential energy of the upper polar plate. The upper polar plate can conveniently swing left and right by overcoming the elastic potential energy of the spring.
Preferably, the method for acquiring the left-right inclination angle of the automobile comprises the following steps: the upper polar plate and the first lower polar plate respectively form capacitors, when the automobile runs horizontally, the upper polar plate does not deflect, the corresponding areas of the upper polar plate, the first lower polar plate and the second lower polar plate are 0, the capacitor size is 0, when the automobile deflects, if the automobile is lifted at the left side, the upper polar plate is influenced by self gravity and deflects rightwards, the upper polar plate and the second lower polar plate generate capacitance values, and the angle deflection size of the automobile is judged according to the capacitance values; if the right side is raised, the upper polar plate deflects leftwards, the upper polar plate and the first lower polar plate generate capacitance values, and the angle deflection of the automobile is judged according to the capacitance values. Simple structure converts the measurement that the car inclination changes into through the capacitance value, and the precision is high, and the error is little.
The invention has the beneficial effects that: (1) under the condition of not changing the mechanical structure of main body core components (motor, speed reducer and controller), the inclination angle of the automobile is detected by the inclination sensing device, corresponding oil circuit arrangement is carried out, and the circulation efficiency of the oil circuit is improved; (2) the reliability of parts is improved, the generalization rate of parts is improved, the die apportionment cost is reduced, the development cost is reduced, the method is suitable for more vehicle type frameworks, and the life cycle of products is prolonged.
Drawings
Fig. 1 is a flow chart diagram of a general oil path interface arrangement method according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a tilt sensing device according to an embodiment of the present invention.
In FIG. 1, a substrate. 2. The device comprises a first spring, a second spring, a first upper polar plate, a second lower polar plate, a first lower polar plate and a second lower polar plate, wherein the first spring is 3, the second spring is 4, the upper polar plate is 5, and the first lower polar plate is 6.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example (b): a general oil way interface arrangement method compatible with different inclination angle architectures is disclosed as shown in figure 1, and comprises the following steps: a plurality of oil inlet pipes are arranged above the central axis of the motor, a plurality of oil return pipes are arranged below the central axis of the motor, each oil inlet pipe corresponds to one oil return pipe, and each oil inlet pipe is provided with a stop valve; arranging a tilt sensing device in the automobile; acquiring left and right inclination information of the automobile detected by an inclination sensing device; acquiring the current running speed, gear state information and an accelerator pedal state of the automobile; calculating the inclination angle of the automobile according to the inclination information of the left automobile and the right automobile, the current running speed of the automobile, the gear state information and the state of an accelerator pedal; and opening a corresponding stop valve according to the inclination angle of the automobile, and setting an oil circuit loop.
The method for calculating the inclination angle of the automobile comprises the following steps:
s21: calculating the front and rear inclination angles of the automobile according to the current running speed of the automobile, gear state information and the state of an accelerator pedal;
s22: acquiring left and right inclination angles of the automobile according to the left and right inclination information of the automobile;
s23: and opening corresponding stop valves according to the front and rear inclination angles and the left and right inclination angles of the automobile, and setting an oil circuit loop.
Front-rear inclination angle theta of automobile1The calculation formula of (A) is as follows:
wherein m represents the mass of the automobile, g represents the acceleration of gravity, a represents the acceleration of the automobile, mu represents the friction coefficient of the automobile and the ground, and f represents the air resistance.
The method for judging the uphill state, the horizontal driving state and the downhill state of the automobile comprises the following steps: the method comprises the steps that a first speed, a second speed and a third speed of an automobile are preset, the gear of the automobile is unchanged, when an accelerator pedal of the automobile is reset to 0 from a certain opening degree, if the automobile is accelerated to the first speed from the current speed within a preset time t, the automobile is in an uphill state, if the automobile is accelerated to the second speed from the current speed within the preset time t, the automobile is in a horizontal driving state, if the automobile is accelerated to the third speed from the current speed within the preset time t, the automobile is in a downhill state, and the acceleration a of the automobile is respectively calculated according to the uphill state, the horizontal driving state and the downhill state of the automobile.
As shown in fig. 2, the tilt sensing apparatus includes a base 1, a MCU, a first spring 2, a second spring 3, go up polar plate 4, first polar plate 5 and second polar plate 6 down, the first end and the 1 inner wall fixed connection of base member of first spring 2, the second end and the one end of last polar plate 4 of first spring 2 are connected, the other end of going up polar plate 4 is connected with the first end of second spring 3, the second end and the 1 inner wall fixed connection of base member of second spring 3, first polar plate 5 is installed in 1 bottom left side of base member, second polar plate 6 is installed on 1 bottom right side of base member, go up polar plate 4 when projecting to 1 bottom of base member with first polar plate 5 and second polar plate 6 zonulae occludens, go up polar plate 4, first polar plate 5 and second polar plate 6 all are connected with MCU, the elastic potential energy of first spring 2 and second spring 3 all is less than the gravitational potential energy of last polar plate 4, make things convenient for the elastic potential energy of last polar plate 4 to overcome the spring to carry out the horizontal hunting.
The method for acquiring the left and right inclination angles of the automobile comprises the following steps: the air is filled in the matrix 1, the air medium, the upper polar plate 4 and the first lower polar plate 5 form a first capacitor, the upper polar plate 4, the air medium and the second lower polar plate 6 form a second capacitor, when the automobile runs horizontally, the upper polar plate 4 does not deflect, the corresponding areas of the upper polar plate 4, the first lower polar plate 5 and the second lower polar plate 6 are 0, the sizes of the first capacitor and the second capacitor are 0, when the automobile deflects, if the left side of the automobile is raised, the upper polar plate 4 is influenced by self gravity, and deflects rightwards, the upper polar plate 4 and the second lower polar plate 6 generate capacitance values, the first capacitor generates capacitance values, and the angular deflection size of the automobile is judged according to the capacitance values of the first capacitor; if the right side is raised, upper polar plate 4 wants left skew, then the second electric capacity produces the capacitance value, judges the angle skew size of car according to the capacitance value size of second electric capacity, produces the capacitance value according to first electric capacity or second electric capacity and judges that the car is that the left side is raised or the right side is raised.
Before the inclination sensing device is put into use, a test can be carried out to obtain a large number of values corresponding to the inclination angles, a capacitance-inclination angle table is established, and the left and right inclination angles of the automobile can be quickly obtained in a table look-up mode in actual use.
The motor module is connected with the reducer interface in a circular spigot matching mode, oil (such as gearbox lubricating oil and the like) of oil-cooled motor cooling liquid circulates to the motor shell from the reducer side through the reducer, and after the oil is sprayed to heating areas such as a motor stator rotor and the like, the oil flows back to an oil pool in a reducer cavity through an oil return pipeline under the action of gravity. The oil circuit structure is arranged along the surfaces of the motor shell and the speed reducing shell and is butted at the box closing surface of the motor and the speed reducer. When the arrangement inclination angle of the electric drive assembly is changed, the height positions of an oil inlet pipeline and an oil return pipeline which are circumferentially arranged on the motor shell are changed, so that the flow of the oil inlet and the flow of the oil return pipeline are influenced.
When the oil inlet position is arranged above the central axis of the motor and arranged along the circumference of the motor shell, the included angle between the center of the oil path and the axis of the motor and the horizontal direction is 20-70 degrees, the inlet oil path flow is maximum, and the included angle between the connecting line of the cross section of the oil return pipe and the axis of the motor and the vertical direction is +/-26 degrees, which is the maximum position of the oil return flow. When the angle range is exceeded, the oil path circulation flow of the oil cold-electricity driving can not reach the optimal state.
When the total arrangement inclination angle of the motor is adjusted, the arrangement angle of the oil inlet pipe is ensured to be within the range of 20-70 degrees, the arrangement angle of the oil return pipe is within the range of +/-26 degrees, and the oil cold-electric drive can normally run.
Based on the structure, the oil inlet pipes are arranged around the motor shell above the central axis of the motor, when the total arrangement inclination angle of the motor is changed due to the driving process of the automobile, the oil circuit circulation route can be changed in real time, the oil circuit circulation is kept in the optimal state forever in the driving process of the automobile, the installation condition of an electric driving power system does not need to be detected, different inclination angle arrangement frameworks are compatible under the condition that an interface structure is not changed, and the oil circuit circulation efficiency is improved.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (8)
1. A general oil way interface arrangement method compatible with different dip angle architectures is characterized by comprising the following steps:
arranging a plurality of oil inlet pipes above a motor central axis and a plurality of oil return pipes below the motor central axis, wherein each oil inlet pipe corresponds to one oil return pipe and is provided with a stop valve;
arranging a tilt sensing device in the automobile;
acquiring left and right inclination information of the automobile detected by an inclination sensing device;
acquiring the current running speed, gear state information and an accelerator pedal state of the automobile;
calculating the inclination angle of the automobile according to the inclination information of the left automobile and the right automobile, the current running speed of the automobile, the gear state information and the state of an accelerator pedal;
and opening a corresponding stop valve according to the inclination angle of the automobile, and setting an oil circuit loop.
2. The method according to claim 1, wherein the tilt sensor device comprises a base, an MCU, a first spring, a second spring, an upper plate, a first lower plate and a second lower plate, a first end of the first spring is fixedly connected to an inner wall of the base, a second end of the first spring is connected to one end of the upper plate, the other end of the upper plate is connected to a first end of the second spring, a second end of the second spring is fixedly connected to an inner wall of the base, the first lower plate is mounted on a left side of the bottom of the base, the second lower plate is mounted on a right side of the bottom of the base, the upper plate is closely connected to the first lower plate and the second lower plate when projected to the bottom of the base, and the upper plate, the first lower plate and the second lower plate are all connected to the MCU.
3. The method for arranging the universal oil way interface compatible with different inclination angle architectures according to claim 2, wherein the method for calculating the inclination angle of the automobile comprises the following steps:
s21: calculating the front and rear inclination angles of the automobile according to the current running speed of the automobile, gear state information and the state of an accelerator pedal;
s22: acquiring left and right inclination angles of the automobile according to the left and right inclination information of the automobile;
s23: and opening corresponding stop valves according to the front and rear inclination angles and the left and right inclination angles of the automobile, and setting an oil circuit loop.
4. The method as claimed in claim 3, wherein the front-rear inclination angle θ of the vehicle is different from the rear-rear inclination angle θ of the vehicle1The calculation formula of (A) is as follows:
wherein m represents the mass of the automobile, g represents the acceleration of gravity, a represents the acceleration of the automobile, mu represents the friction coefficient of the automobile and the ground, and f represents the air resistance.
5. The method for arranging the universal oil way interface compatible with different inclination angle architectures according to claim 4, wherein the front and back inclination of the automobile comprises an uphill condition, a horizontal driving condition and a downhill condition, and the method for judging the uphill condition, the horizontal driving condition and the downhill condition of the automobile comprises the following steps: the method comprises the steps that a first speed, a second speed and a third speed of an automobile are preset, the gear of the automobile is unchanged, when an accelerator pedal of the automobile is reset to 0 from a certain opening degree, if the automobile is accelerated to the first speed from the current speed within a preset time t, the automobile is in an uphill state, if the automobile is accelerated to the second speed from the current speed within the preset time t, the automobile is in a horizontal driving state, and if the automobile is accelerated to the third speed from the current speed within the preset time t, the automobile is in a downhill state.
6. The method for arranging the universal oil way interface compatible with different inclination angle architectures according to claim 5, wherein the acceleration a of the automobile is calculated according to the uphill condition, the horizontal driving condition and the downhill condition of the automobile respectively.
7. The method for arranging the universal oil way interface compatible with different inclination angle architectures according to claim 2, wherein elastic potential energy of the first spring and elastic potential energy of the second spring are both smaller than gravitational potential energy of the upper polar plate.
8. The method for arranging the universal oil way interface compatible with different inclination angle architectures according to claim 3, wherein the method for acquiring the left and right inclination angles of the automobile comprises the following steps: the upper polar plate and the first lower polar plate respectively form capacitors, when the automobile runs horizontally, the upper polar plate does not deflect, the corresponding areas of the upper polar plate, the first lower polar plate and the second lower polar plate are 0, the capacitor size is 0, when the automobile deflects, if the automobile is lifted at the left side, the upper polar plate is influenced by self gravity and deflects rightwards, the upper polar plate and the second lower polar plate generate capacitance values, and the angle deflection size of the automobile is judged according to the capacitance values; if the right side is raised, the upper polar plate wants to deflect leftwards, the upper polar plate and the first lower polar plate generate capacitance values, and the angular deflection of the automobile is judged according to the capacitance values.
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| DE3121621C2 (en) * | 1981-05-30 | 1984-01-05 | Daimler-Benz Ag, 7000 Stuttgart | "Ventilation device for fuel tanks of vehicles, in particular of motor vehicles" |
| JP2001003842A (en) * | 1999-06-16 | 2001-01-09 | Suzuki Motor Corp | Fuel supplying device |
| JP2001003825A (en) * | 1999-06-16 | 2001-01-09 | Suzuki Motor Corp | Engine parts arranging structure |
| JP2006321468A (en) * | 2005-04-20 | 2006-11-30 | Toyoda Gosei Co Ltd | Fuel shut-off valve |
| CN207059759U (en) * | 2017-07-18 | 2018-03-02 | 宝沃汽车（中国）有限公司 | The control system of fuel tank and its Anti-inclining oil-break, vehicle |
| CN108621728A (en) * | 2018-06-15 | 2018-10-09 | 中宇航通（北京）科技有限公司 | A kind of hovercar center of gravity automatic regulating system and method and hovercar |
| JP7056536B2 (en) * | 2018-12-06 | 2022-04-19 | トヨタ自動車株式会社 | Fuel cell vehicle |
| CN110080968A (en) * | 2019-04-23 | 2019-08-02 | 东风商用车有限公司 | A kind of built-in oil charging structure of vehicle air compressor |
| CN110281891B (en) * | 2019-07-04 | 2020-05-22 | 高鸿新能源科技有限公司 | Automatic parking method based on multi-sensor fusion |
| CN110626163A (en) * | 2019-09-12 | 2019-12-31 | 中国第一汽车股份有限公司 | Double-oil-pump oil supply system of saddle-shaped oil tank |
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