CN110154653B - Automatic inflation and deflation device for vehicle tires and control method thereof - Google Patents
Automatic inflation and deflation device for vehicle tires and control method thereof Download PDFInfo
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- CN110154653B CN110154653B CN201910465983.9A CN201910465983A CN110154653B CN 110154653 B CN110154653 B CN 110154653B CN 201910465983 A CN201910465983 A CN 201910465983A CN 110154653 B CN110154653 B CN 110154653B
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract description 30
- 238000007599 discharging Methods 0.000 claims description 20
- 238000012806 monitoring device Methods 0.000 claims description 12
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 4
- 230000030279 gene silencing Effects 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 description 22
- 230000001133 acceleration Effects 0.000 description 12
- 230000001276 controlling effect Effects 0.000 description 5
- 230000005484 gravity Effects 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/10—Arrangement of tyre-inflating pumps mounted on vehicles
Abstract
The invention discloses an automatic inflation and deflation device for vehicle tires, which comprises: a gas source; and a control valve connected to the gas source; a wheel rim assembly connected between the control valve and a vehicle tire; the wheel rim assembly includes: a knuckle air passage provided inside a knuckle of a vehicle; the semi-axis air passage is arranged in the semi-axis, and one end of the semi-axis air passage is connected with the sealing air chamber; the sealed air chamber is arranged in the steering knuckle, is sleeved outside the half shaft of the vehicle in an annular mode, and one side of the sealed air chamber is connected with the other end of the steering knuckle air channel; the rim air flue is arranged inside the vehicle rim, one end of the rim air flue is connected with the other end of the half-shaft air flue, and the other end of the rim air flue is connected with the vehicle tire. The invention also provides a control method of the automatic inflation and deflation device for the vehicle tyre, which can accurately control the tyre pressure of the tyre according to specific road conditions and environments and prolong the service life of the tyre.
Description
Technical Field
The invention relates to the technical field of automobile driving, in particular to an automatic inflation and deflation device for a vehicle tire and a control method thereof.
Background
With the development of the automobile industry, vehicles are gradually applied to more fields, the requirements of people on the vehicles are also higher and higher, the automatic tire inflation and deflation device is originally adopted on military vehicles, the central tire inflation and deflation device is developed for improving the passing performance of military vehicles in the second world war time, the device is gradually applied to civil passenger vehicles and off-road vehicles along with the gradual maturity of technology, the ground attachment condition can be utilized to the greatest extent by analyzing the tire pressure to be adjusted to a proper range according to different road conditions from the aspect of dynamics, and the dynamic performance and passing performance of the vehicles are improved, the tire pressure directly influences the oil consumption and the tire abrasion condition, so that the control of the tire pressure in the proper range is of great importance for improving the passing performance, the fuel economy and the running safety of the vehicles.
Some current high-grade vehicle types are generally provided with a tire pressure monitoring device to remind a driver of performing inflation and deflation operations when the tire pressure is in an unsafe state, but the device only has the reminding function, the driver is required to perform the inflation and deflation operations manually, and some devices which can be attached to the vehicle can automatically regulate the tire pressure, but the device needs more additionally installed components and has lower device integration level.
Disclosure of Invention
The invention aims to design and develop an automatic tire inflation and deflation device for a vehicle, which is applied to a highly integrated wheel rim assembly part of an automobile, wherein an air passage of the wheel rim assembly is integrated into the device, and the device for inflating, deflating, pressure measuring and pressure maintaining the automobile tire can be used for inflating, deflating and pressure maintaining the automobile tire when the automobile is parked or driven, so that the passing performance, the economy and the driving safety of the automobile are greatly improved.
The invention further aims to design and develop a control method of the automatic inflation and deflation device of the vehicle tyre, which can accurately control the tyre pressure of the vehicle tyre according to specific road conditions and environments, so that the tyre can keep different tyre pressures under different road conditions, and the service life of the tyre is prolonged.
The technical scheme provided by the invention is as follows:
an automatic inflation and deflation device for a vehicle tire, comprising:
a gas source; and
a control valve connected to the gas source;
a wheel rim assembly connected between the control valve and a vehicle tire;
wherein, wheel limit device assembly includes:
a knuckle air passage provided inside a knuckle of the vehicle, one end of the knuckle air passage being in communication with the control valve;
the sealed air chamber is arranged in the steering knuckle, is sleeved outside the half shaft of the vehicle in an annular mode, and one side of the sealed air chamber is connected with the other end of the steering knuckle air channel;
the half shaft air passage is arranged in the vehicle half shaft, and one end of the half shaft air passage is connected with the other side of the sealed air chamber;
the rim air passage is arranged in the vehicle rim, one end of the rim air passage is connected with the other end of the half-shaft air passage, and the other end of the rim air passage is connected with a vehicle tire;
the sealing gasket is of a hollow disc structure, is rotatably arranged between the half shaft and the rim, and is provided with two air holes for communicating the half shaft air passage with the rim air passage.
Preferably, the gas source comprises:
an air compressor; and
and the air storage tank is connected with the air compressor.
Preferably, the control valve includes:
a boost control valve connected to the air source;
the inflation and deflation control valve is connected with the pressurization control valve and is provided with an air inlet station and an air outlet station;
the air channel distribution device is provided with an air inlet and a plurality of air outlets at two ends respectively, and the air inlet is connected with the air charging and discharging control valve;
a plurality of outlet control valves which are respectively and fixedly arranged at a plurality of air outlets of the air passage distribution device;
wherein the air source, the pressurization control valve, the inflation and deflation control valve, the air passage distribution device, the plurality of outlet control valves and the wheel rim device assembly are all arranged on a chassis device of the vehicle.
Preferably, the method further comprises:
a control unit which is connected to the pressure increasing control valve, the charge/discharge control valve, and the plurality of outlet control valves at the same time, and is capable of controlling the pressure increasing control valve, the charge/discharge control valve, and the plurality of outlet control valves, respectively;
a tire pressure monitoring device which is provided inside the tire, and which is connected with the control unit.
Preferably, the method further comprises:
a first high pressure air passage connected between the air source and the pressurization control valve,
a second high-pressure air passage connected between the pressurizing control valve and the charge-discharge control valve;
the third high-pressure air passage is connected with the inflation and deflation control valve and one end of an air inlet of the air passage distribution device;
and a plurality of connecting pipes connected between the plurality of outlet control valves and the other end of the knuckle air passage, respectively.
Preferably, the pressurizing control valve is a two-position two-way electromagnetic valve, the charging and discharging control valve is a three-position four-way electromagnetic valve, and the outlet control valve is a two-position two-way electromagnetic valve.
A control method of an automatic inflation and deflation device for a vehicle tire comprises the following steps:
step 1: monitoring the ambient temperature, the road surface temperature and the road surface gradient through the sensor, monitoring the real-time tire pressure of the tire through the tire pressure monitoring device, and transmitting the real-time tire pressure to the control unit;
step 2: comparing the real-time tire pressure with a tire pressure standard in the control unit:
if the real-time tire pressure is smaller than the tire pressure standard, the control unit selects the following inflation mode:
the control unit controls the connection of the air inlet stations of the pressurizing control valve and the air charging and discharging control valve, simultaneously controls the opening of the outlet control valve corresponding to the tire with insufficient tire pressure, and high-pressure air sequentially passes through the pressurizing control valve, the air charging and discharging control valve, the air passage distribution device, the outlet control valve, the knuckle air passage, the sealing air chamber, the half-shaft air passage and the rim air passage from an air source to finally communicate with the tire;
if the real-time tire pressure is greater than the tire pressure standard, the control unit selects the following deflation mode:
the control unit controls the pressurization control valve to be closed, controls the air outlet station of the air charging and discharging control valve to be conducted, simultaneously controls the outlet control valve corresponding to the tire with the too high tire pressure to be opened, and air flows out of the tire and is discharged into the atmosphere through the air charging and discharging control valve after sequentially passing through the rim air passage, the half-shaft air passage, the sealed air chamber, the knuckle air passage, the outlet control valve and the air passage distribution device.
Preferably, the tire pressure standard is divided into three modes according to different road conditions:
when the road condition is in highway mode: the tire pressure standard is 600KPa;
when the road condition is in the off-road mode: the tire pressure standard is 450KPa;
when the road condition is in a soft mode: the tire pressure standard is 300KPa.
Preferably, in the inflation mode, the outlet control valve opening degree satisfies the following condition:
if 75% P w ＜P v ＜P w When ov=40%;
if 50% P w ≤P v ＜75％P w When ov=75%;
if P v ≤50％P w When ov=100%;
wherein P is v For real-time tire pressure, P w The valve opening degree of the outlet control valve is OV, which is the tire pressure standard;
in the deflation mode, the opening degree of the valve of the outlet control valve meets the following conditions:
if P w ＜P v ＜125％P w When ov=40%;
if P v ≥150％P w When ov=75%;
if 125% P w ≤P v ＜150％P w When ov=100%;
wherein P is v For real-time tire pressure, P w And the OV is the opening degree of the outlet control valve.
Preferably, when the vehicle weight satisfies: when m is more than 0 and less than 6000kg, the tire pressure meets the following conditions:
when the vehicle speed is more than 0 and less than or equal to 80km/h, the tire pressure is more than or equal to:
wherein P is v Is the tire pressure of the electric tire, beta is the front wheel inner beam angle of the electric tire, xi is the road gradient, m is the weight of the vehicle, g is the gravitational acceleration, f r For the coefficient of friction of the vehicle tyre with the ground, f v For rolling resistance of vehicle tyre, T 0 At ambient temperature, T 1 The road surface temperature is K, the weight coefficient is K, and the vehicle running speed is V;
wherein, road surface gradient satisfies:
wherein tau is the included angle between the running road surface of the vehicle and the horizontal plane;
when the vehicle speed is more than 80km/h, the tire pressure is as follows:
wherein P is v Is the tire pressure of the electric tire, and beta is electricFront wheel inner beam angle of wheel tyre, ζ is road surface gradient, m is vehicle weight, g is gravity acceleration, f r For the coefficient of friction of the vehicle tyre with the ground, f v Is the rolling resistance of the vehicle tyre, tau is the included angle between the running road surface of the vehicle and the horizontal plane, T 0 At ambient temperature, T 1 The road surface temperature is K, the weight coefficient is K, and the vehicle running speed is V;
when the vehicle weight is 6000kg or less and m is less than 20000kg, the tire pressure is as follows:
wherein P is v Is the tire pressure of the electric tire, beta is the front wheel inner beam angle of the electric tire, xi is the road gradient, m is the weight of the vehicle, g is the gravitational acceleration, f r For the coefficient of friction of the vehicle tyre with the ground, f v For rolling resistance of vehicle tyre, T 0 At ambient temperature, T 1 The road surface temperature, K is a weight coefficient, S f Is the windward area of the automobile; and
when the vehicle weight satisfies m is more than or equal to 20000kg, the tire pressure satisfies:
wherein P is v Is the tire pressure of the electric tire, beta is the front wheel inner beam angle of the electric tire, xi is the road gradient, m is the weight of the vehicle, g is the gravitational acceleration, f r For the coefficient of friction of the vehicle tyre with the ground, f v Is the rolling resistance of the vehicle tyre, tau is the included angle between the running road surface of the vehicle and the horizontal plane, T 0 At ambient temperature, T 1 The road surface temperature, K is a weight coefficient, S f Is the windward area of the automobile.
The beneficial effects of the invention are as follows:
(1) The automatic inflation and deflation device for the vehicle tires can greatly improve the running capability of the vehicle in complex and severe zones by additionally installing the central inflation and deflation device for the vehicle tires, shorten the running time, improve the running efficiency, save fuel, prolong the service life of the vehicle, and can be used for inflating, deflating, measuring pressure and maintaining pressure for the vehicle tires when parking or driving.
(2) The control method of the automatic inflation and deflation device for the vehicle tires can accurately control the tire pressures of the vehicle tires according to specific road conditions and environments, so that the tires can keep different tire pressures under different road conditions, and the service lives of the tires are prolonged.
Drawings
Fig. 1 is a schematic structural view of an automatic inflation and deflation device for a vehicle tire according to the present invention.
Fig. 2 is a schematic structural view of the wheel rim assembly according to the present invention.
FIG. 3 is a schematic cross-sectional view of the airtight chamber of the present invention.
Fig. 4 is an isometric view of the structure of the positioning sleeve of the present invention.
Fig. 5 is a schematic structural view of the sealing gasket of the present invention.
Fig. 6 is an isometric view of the structure of the wheel rim assembly of the present invention.
Detailed Description
The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.
The invention provides an automatic inflation and deflation device for vehicle tires, which comprises a tire pressure monitoring device 190, an air source device, a control valve, a control unit 170, a plurality of connecting pipelines 165 and a wheel rim device assembly 150, wherein the tire pressure monitoring device 190 is arranged inside four or more tires of a vehicle driven by the vehicle, and the air source device, the control valve, the control unit 170, the plurality of connecting pipelines 165 and the wheel rim device assembly 150 are all arranged on a chassis device driven by the vehicle.
As shown in fig. 1, which is a general structural schematic diagram of the present invention, the control valve includes: the device comprises a supercharging control valve 110, an air charging and discharging control valve 120 and a plurality of outlet control valves, wherein the supercharging control valve 110 is a two-position two-way electromagnetic valve, the air charging and discharging control valve 120 is a three-position four-way electromagnetic valve, the outlet control valves are two-position two-way electromagnetic valves, the outlet control valves are in one-to-one correspondence with tires of an automobile driven by a vehicle, the outlet control valves 141 are corresponding to a right front wheel, the outlet control valves 142 are corresponding to a right rear wheel, the outlet control valves 143 are corresponding to the right rear wheel, the outlet control valves 144 are corresponding to the right front wheel, the number of the outlet control valves is the same as the number of the tires, an air source device is arranged on the upper part of a chassis device driven by the vehicle, and the air source device comprises: an air compressor 101, an air storage tank 102, a filter 103 and a plurality of high pressure pipes, wherein the air compressor 101 compresses air in the environment into high pressure gas, the high pressure gas is transported into the air storage tank 102 through the high pressure pipes, the pressure inside the air storage tank is kept constant through a pressure gauge, the filter 103 is connected with the air storage tank 102 through the high pressure pipes, the purpose is to filter the gas entering the device, and the service life and the working stability of a control valve and a pipeline are improved; one end of the pressurizing control valve 110 is connected with the filter 103 of the air source device through a first high-pressure air channel 161, the other end of the pressurizing control valve 110 is connected with one end of the inflating and deflating control valve 120 through a second high-pressure air channel 162, the inflating and deflating control valve 120 is also connected with a silencing valve 180 through a connecting pipeline 165, when the device deflates a tire, noise is not emitted, the inflating and deflating control valve 120 is provided with two stations, the first station 121 is an air inlet station, the second station 122 is an air outlet station, the inflating and deflating control valve 120 is connected with the third high-pressure air channel 130 through a third high-pressure air channel 163 at the other end, a pressure sensor 164 is arranged on the third high-pressure air channel 163, the pressure value of the third high-pressure air channel 163 is monitored at any time, the third high-pressure air channel 130 is provided with an air inlet and a plurality of air outlets, the number of the air outlets of the third high-pressure air channel 130 is the same as that of the tire, the air outlets of the third high-pressure air channel 130 are in one-to-one correspondence with the tire, the plurality of air outlets of the third high-pressure air channel 130 are arranged in one-to-one correspondence, and the other end of the outlet control valve is in one-to-one wheel-to-one device 150 through a plurality of connecting pipelines.
As shown in fig. 1, the tire pressure monitoring device 190, the pressurization control valve 110, the first and second stations 121 and 122 of the inflation and deflation control valve 120, and the third high-pressure air channel 130 are all connected to the control unit 170, the control unit 170 receives real-time tire pressure signals of the tire pressure monitoring device 190, and the control unit 170 is capable of controlling the pressurization control valve 110, the first and second stations 121 and 122 of the inflation and deflation control valve 120, and the plurality of outlet control valves, respectively.
As shown in fig. 2 and 3, the rim device assembly 150 according to the present invention is schematically shown, where a tire 191 of a vehicle is connected to a rim 192, a brake disc 193 is provided between the rim 192 and a half shaft 155, and a knuckle 194 is connected to the half shaft 155, and the rim device assembly 150 according to the present invention includes: the steering knuckle air channel 151, the sealing ring 152, the rim air channel 153, the half axle air channel 154, the sleeve 156, the sealing air chamber 157 and the sealing gasket 158, wherein the steering knuckle air channel 151 is arranged inside the steering knuckle 194, one end of the steering knuckle air channel 151 is connected with the connecting pipeline 165, the other end of the steering knuckle air channel 151 is connected with one side of the sealing air channel 157, the sealing air chamber 157 is arranged inside the steering knuckle 194 and surrounds the outer side of the half axle 155 in a ring shape, the half axle air channel 154 is arranged inside the half axle 155, one end of the half axle air channel 154 is connected with the other side of the sealing air channel 157, when the steering knuckle 194 rotates around the vehicle half axle 155, the sealing air channel 157 can ensure the communication between the steering knuckle air channel 151 and the half axle air channel 154, the sleeve 156 is arranged between the sealing air channel 157 and the half axle 155, the sleeve 156 can ensure the rotatability and the sealing performance of the sealing air channel 157, the rim air channel 153 is arranged inside the rim 192, one end of the rim air channel 153 is connected with the other end of the half axle air channel 154, the other end of the rim air channel 153 is connected with the tire 153, the half axle 158 is arranged in the middle of the half axle 155, and the half axle 158, and the sealing gasket 158 is arranged, and the sealing performance of the half axle 153 is disabled by the sealing air channel 154 is ensured, when the steering knuckle air channel 157 rotates around the vehicle half axle 155, and the half axle 155, the sealing air channel 154 can be selectively blocked, and the sealing air channel 153.
According to the automatic inflation and deflation device for the vehicle tires, a distribution pipeline connected by the third high-pressure air channel 130 is connected with air holes on the steering knuckle 194, the steering knuckle air channel 151 is connected with the half-shaft air channel 154 through the sealing air chamber 157, the half-shaft air channel 154 is connected with the rim air channel 153 through the air channel on the sealing gasket 158 and finally communicated with the tires, and the inflation and deflation functions of the device are realized by controlling the control unit 170 according to signals fed back to the control unit 170 by the pressure sensors 164 arranged in the third high-pressure air channel 163 and the tire pressure monitoring devices 190 arranged in the four tires.
In addition, the device can not only disable the device by disabling the outlet control valve, but also disable the device by changing the connection positions of the sealing gasket 158 and the rim 192 and the half shaft 155, as shown in fig. 5, when the device is in normal operation, the sealing gasket air hole 160 is communicated with the half shaft air passage 154 and the rim air passage 153, and the sealing gasket 158 can be rotated 45 degrees clockwise or anticlockwise relative to the rim 192 when the device is disabled, at this time, the sealing gasket air hole 160 can not play a role of communicating the half shaft air passage 154 with the rim air passage 153 after being rotated 45 degrees, and the sealing gasket 158 can seal the communication between the half shaft air passage 154 and the rim air passage 153, so that the purpose of manually disabling the device is achieved.
As shown in FIG. 6, the whole device is arranged in the tire of a vehicle, is safer and simpler and saves more space, and is an overall side view structure diagram of the automatic tire inflation and deflation device.
The automatic inflation and deflation device for the vehicle tires can be used for inflating, deflating, measuring pressure and maintaining pressure for the vehicle tires when the vehicle is stopped or driven, so that the tire pressure can be conveniently and rapidly detected and regulated, the vehicle can select proper tire pressure according to different road surfaces, and the vehicle passing capacity is improved; when the automobile runs for a long distance, the tire heats, the device can detect and adjust the air pressure of the tire at any time, and the condition that the tire bursts can be avoided; when the tire is punctured, the tire can be inflated and driven at the same time, so that the automobile can be separated from the dangerous zone and can be driven as far as possible; the tire pressure and thus the vehicle height can be reduced by the device, so that the vehicle can pass through places with height restrictions. Or the tire pressure is reduced, the adhesion force of the tire to the ground is increased, and the road conditions such as sand beach, snow, wetland and the like which are easy to slip or sink the vehicle are passed.
The invention also provides a control method of the automatic inflation and deflation device of the vehicle tyre, which comprises the following steps:
step 1: monitoring the ambient temperature, the road surface temperature and the road surface gradient through the sensor, monitoring the real-time tire pressure of the tire through the tire pressure monitoring device, and transmitting the real-time tire pressure to the control unit;
step 2: comparing the real-time tire pressure with a tire pressure standard in the control unit:
if the real-time tire pressure is smaller than the tire pressure standard, the control unit selects the following inflation mode:
the control unit controls the connection of the air inlet stations of the pressurizing control valve and the air charging and discharging control valve, simultaneously controls the opening of the outlet control valve corresponding to the tire with insufficient tire pressure, and sequentially enables high-pressure air to pass through the pressurizing control valve, the air charging and discharging control valve, the air passage distribution device, the outlet control valve, the knuckle air passage, the sealing air chamber, the half-shaft air passage and the rim air passage from an air source to finally be communicated with the tire so as to charge the tire with insufficient air pressure;
if the real-time tire pressure is greater than the tire pressure standard, the control unit selects the following deflation mode:
the control unit controls the pressurization control valve to be closed, controls the air outlet station of the air charging and discharging control valve to be conducted, simultaneously controls the outlet control valve corresponding to the tire with the too high tire pressure to be opened, and air flows out of the tire, and is discharged to the atmosphere through the air charging and discharging control valve after sequentially passing through the rim air passage, the half-shaft air passage, the sealed air chamber, the knuckle air passage, the outlet control valve and the air passage distribution device, so that the air discharging of the tire is realized.
Step 2.1, the tire pressure standard is divided into three modes according to different road conditions:
highway mode: the road conditions mainly comprise hard base asphalt or cement road surfaces, and the tire pressure standard is 600KPa;
off-road mode: the road conditions of simple roads such as fields, gobi, deserts and the like are mainly included, and the tire pressure standard is 450KPa;
soft mode: the tire pressure standard is 300KPa.
In the step 2, each valve has three openings of 40%, 75% and 100%, the opening of the valve can be controlled by the control unit, and in the inflation mode, the valve opening of the outlet control valve and the real-time tire pressure of the tire meet the following conditions:
if 75% P w ＜P v ＜P w When ov=40%;
if 50% P w ≤P v ＜75％P w When ov=75%;
if P v ≤50％P w When ov=100%;
wherein P is v For real-time tire pressure, P w Is the tire pressure standard, and OV is the valve opening;
in the deflation mode, the valve opening of the outlet control valve and the real-time tire pressure of the tire meet the following conditions:
if P w ＜P v ＜125％P w When ov=40%;
if P v ≥150％P w When ov=75%;
if 125% P w ≤P v ＜150％P w When ov=100%;
wherein P is v For real-time tire pressure, P w Is the tire pressure standard, and OV is the valve opening.
The real-time tire pressure is influenced by the speed and the weight of the electric wheel driven vehicle, and when the weight of the vehicle meets the following conditions: when m is more than 0 and less than 6000kg, the tire pressure is mainly influenced by the vehicle speed,
when the vehicle speed is more than 0 and less than or equal to 80km/h, the tire pressure is more than or equal to:
wherein P is v Is the tire pressure of the electric tire, beta is the front wheel inner beam angle of the electric tire, xi is the road gradient, m is the weight of the vehicle, g is the gravitational acceleration, f r For the coefficient of friction of the vehicle tyre with the ground, f v For rolling resistance of vehicle tyre, T 0 At ambient temperature, T 1 Is the road surface temperature, K isThe weight coefficient, V is the vehicle running speed;
wherein, road surface gradient satisfies:
wherein tau is the included angle between the running road surface of the vehicle and the horizontal plane;
when the vehicle speed is more than 80km/h, the tire pressure is as follows:
wherein P is v Is the tire pressure of the electric tire, beta is the front wheel inner beam angle of the electric tire, xi is the road gradient, m is the weight of the vehicle, g is the gravitational acceleration, f r For the coefficient of friction of the vehicle tyre with the ground, f v Is the rolling resistance of the vehicle tyre, tau is the included angle between the running road surface of the vehicle and the horizontal plane, T 0 At ambient temperature, T 1 The road surface temperature is K, the weight coefficient is K, and the vehicle running speed is V;
when the vehicle weight is more than 6000kg, the tire pressure is mainly influenced by the vehicle weight, and when the vehicle weight is more than 6000kg and less than or equal to m and less than 20000kg, the tire pressure is as follows:
wherein P is v Is the tire pressure of the electric tire, beta is the front wheel inner beam angle of the electric tire, xi is the road gradient, m is the weight of the vehicle, g is the gravitational acceleration, f r For the coefficient of friction of the vehicle tyre with the ground, f v For rolling resistance of vehicle tyre, T 0 At ambient temperature, T 1 The road surface temperature, K is a weight coefficient, S f Is the windward area of the automobile;
when the vehicle weight satisfies m is more than or equal to 20000kg, the tire pressure satisfies:
wherein P is v Is the tire pressure of the electric tire, beta is the front wheel inner beam angle of the electric tire, xi is the road gradient, m is the weight of the vehicle, g is the gravitational acceleration, f r For the coefficient of friction of the vehicle tyre with the ground, f v Is the rolling resistance of the vehicle tyre, tau is the included angle between the running road surface of the vehicle and the horizontal plane, T 0 At ambient temperature, T 1 The road surface temperature, K is a weight coefficient, S f Is the windward area of the automobile.
Wherein, the automobile windward area satisfies:
S f ＝0.81bh
wherein S is f The vehicle is in windward area, b is the width of the vehicle, and h is the height of the vehicle.
In one embodiment, the included angle between the running road surface of the vehicle and the horizontal plane is 18 degrees, namely the road gradient is 20 degrees, the ambient temperature is 24 degrees, the road temperature is 36 degrees, the toe-in angle of the front wheels of the vehicle tyre is 9 degrees, the friction coefficient of the vehicle tyre and the ground is in the range of 1.1-1.5, the rolling resistance coefficient of the vehicle tyre is in the range of 0.01-0.018 in the highway mode, the rolling resistance coefficient of the vehicle tyre is in the range of 0.025-0.03 in the off-road mode, the rolling resistance coefficient of the vehicle tyre is in the range of 0.1-0.25 in the soft mode, and the rolling resistance of the vehicle tyre is as follows:
f v ＝f 1 m
wherein f v For rolling resistance of vehicle tyres, f 1 The rolling resistance coefficient of the vehicle tire is given by m, which is the weight of the vehicle.
In highway mode, the vehicle weight is 2500kg, the friction coefficient between the vehicle tyre and the ground is 1.1, and the gravity acceleration is 9.8m/s 2 The rolling resistance coefficient of the vehicle tyre is 0.015, namely the rolling resistance of the vehicle tyre is 37.5N, the weight coefficient is 0.0029 when the vehicle speed is 80km/h, the real-time tyre pressure of the vehicle is 593.1KPa, and the requirement of 75% P is met w ＜P v ＜P w Therefore, the inflation mode should be selected and the valve opening is 40%.
In another aspectIn one embodiment, in highway mode, the vehicle weight is 2500kg, the included angle between the running road surface and the horizontal plane of the vehicle is 18 degrees, namely the road gradient is 20 degrees, the ambient temperature is 24 degrees, the road surface temperature is 36 degrees, the inner toe angle of the front wheel of the vehicle tire is 9 degrees, the friction coefficient of the vehicle tire and the ground is 1.1, and the gravity acceleration is 9.8m/s 2 The rolling resistance coefficient of the vehicle tyre is 0.015, namely the rolling resistance of the vehicle tyre is 37.5N, the weight coefficient is 4.63 when the vehicle speed is 90km/h, the real-time tyre pressure of the vehicle is 629.22KPa, and P is satisfied w ＜P v ＜125％P w Therefore, the deflation mode should be selected, and the valve opening is 40%.
In another embodiment, in highway mode, the vehicle weight is 9000kg, the angle between the road surface on which the vehicle is traveling and the horizontal plane is 18 degrees, namely the road gradient is 20 degrees, the ambient temperature is 24 degrees, the road surface temperature is 36 degrees, the toe-in angle of the front wheel of the vehicle tire is 9 degrees, the friction coefficient of the vehicle tire and the ground is 1.1, and the gravity acceleration is 9.8m/s 2 The rolling resistance coefficient of the vehicle tire was 0.015, i.e., the rolling resistance of the vehicle tire was 37.5N, the width of the vehicle was 3.3m, and the height of the vehicle was 2.8m, so that the frontal area of the vehicle was 7.4844m 2 The weight coefficient is 121.13, the real-time tire pressure of the vehicle is 617.58KPa, and P is satisfied w ＜P v ＜125％P w The bleed mode should be selected and the valve opening is 40%.
In another embodiment, in highway mode, the vehicle weight is 23000kg, the angle between the road surface on which the vehicle is traveling and the horizontal plane is 18 degrees, i.e., the road gradient is 20 degrees, the ambient temperature is 24 degrees, the road temperature is 36 degrees, the toe-in angle of the vehicle tire is 9 degrees, the friction coefficient between the vehicle tire and the ground is 1.1, and the gravitational acceleration is 9.8m/s 2 The rolling resistance coefficient of the vehicle tire was 0.015, i.e., the rolling resistance of the vehicle tire was 37.5N, the width of the vehicle was 3.3m, and the height of the vehicle was 2.8m, so that the frontal area of the vehicle was 7.4844m 2 The weight coefficient is 27.88, the real-time tire pressure of the vehicle is 551.26KPa, and the tire pressure meets 75 percent w P＜ v P＜ w P, so the inflation mode should be selected and the valve opening is 40%.
When the tire of the vehicle is punctured or leaked, the control unit controls the opening degrees of the pressurizing control valve, the inflating and deflating control valve and the outlet control valve to be 100%, so that the tire of the vehicle can be inflated and driven at the same time, and the vehicle can be driven as far as possible when being separated from the dangerous zone.
The control method of the automatic inflation and deflation device for the electric tire provided by the invention comprises the following working processes:
inflation mode: the tire pressure monitoring device is arranged in the tire to monitor the tire information of the vehicle and send the tire information to the control unit, the control unit is used for judging after comparing the tire pressure with the optimal tire pressure, when the tire pressure is insufficient, the control unit is used for controlling the opening of the pressurizing control valve and controlling the first station of the inflating and deflating control valve to be conducted, meanwhile, the outlet control valve arranged on the air passage distribution device corresponding to the tire with insufficient air pressure is controlled to be opened, and the high-pressure air passing through the outlet control valve is connected with the rim air passage through the steering knuckle air passage, the sealing air chamber and the half-shaft air passage and finally communicated with the tire to inflate the tire with insufficient air pressure.
Deflation mode: when the tire pressure is too high, the control unit controls the pressurization control valve to be closed, the second station of the inflation and deflation control valve is controlled to be conducted, the outlet control valve arranged on the air passage distribution device corresponding to the tire with the too high air pressure is controlled to be opened for deflation, and air flows out of the tire and finally is discharged into the atmosphere through the inflation and deflation control valve and the silencing valve after sequentially passing through the rim air passage, the half-shaft air passage, the sealed air chamber, the knuckle air passage, the outlet control valve and the air distribution device, so that the function of deflating the tire is realized.
The control method of the automatic inflation and deflation device for the electric tire provided by the invention can accurately control the tire pressure of the electric tire according to specific road conditions and environments, so that the tire can keep different tire pressures under different road conditions, the service life of the electric tire is prolonged, and financial resources are saved.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (8)
1. An automatic inflation and deflation device for a vehicle tire, comprising:
a gas source; and
a control valve connected to the gas source;
a wheel rim assembly connected between the control valve and a vehicle tire;
wherein, wheel limit device assembly includes:
a knuckle air passage provided inside a knuckle of the vehicle, one end of the knuckle air passage being in communication with the control valve;
the sealed air chamber is arranged in the steering knuckle, is sleeved outside the half shaft of the vehicle in an annular mode, and one side of the sealed air chamber is connected with the other end of the steering knuckle air channel;
the half shaft air passage is arranged in the vehicle half shaft, and one end of the half shaft air passage is connected with the other side of the sealed air chamber;
the rim air passage is arranged in the vehicle rim, one end of the rim air passage is connected with the other end of the half-shaft air passage, and the other end of the rim air passage is connected with a vehicle tire;
the sealing gasket is of a hollow disc structure, is rotatably arranged between the half shaft and the rim, and is provided with two air holes for communicating the half shaft air passage with the rim air passage;
the control valve includes:
a boost control valve connected to the air source;
the inflation and deflation control valve is connected with the pressurization control valve and is provided with an air inlet station and an air outlet station;
the air channel distribution device is provided with an air inlet and a plurality of air outlets at two ends respectively, and the air inlet is connected with the air charging and discharging control valve;
a plurality of outlet control valves which are respectively and fixedly arranged at a plurality of air outlets of the air passage distribution device;
the air source, the supercharging control valve, the air charging and discharging control valve, the air passage distribution device, the plurality of outlet control valves and the wheel rim device assembly are all arranged on a chassis device of the vehicle, and the air charging and discharging control valve is connected with the silencing valve through a connecting pipeline.
2. The automatic inflation and deflation device of claim 1, wherein the air supply comprises:
an air compressor; and
and the air storage tank is connected with the air compressor.
3. The automatic inflation and deflation device for a vehicle tire as recited in claim 2, further comprising:
a control unit which is connected to the pressure increasing control valve, the charge/discharge control valve, and the plurality of outlet control valves at the same time, and is capable of controlling the pressure increasing control valve, the charge/discharge control valve, and the plurality of outlet control valves, respectively;
a tire pressure monitoring device which is provided inside the tire, and which is connected with the control unit.
4. A vehicle tire automatic inflation and deflation device as recited in claim 3, further comprising:
a first high pressure air passage connected between the air source and the pressurization control valve,
a second high-pressure air passage connected between the pressurizing control valve and the charge-discharge control valve;
the third high-pressure air passage is connected with the inflation and deflation control valve and one end of an air inlet of the air passage distribution device;
and a plurality of connecting pipes connected between the plurality of outlet control valves and the other end of the knuckle air passage, respectively.
5. The automatic inflation and deflation device of claim 4, wherein the pressurization control valve is a two-position two-way solenoid valve, the inflation and deflation control valve is a three-position four-way solenoid valve, and the outlet control valve is a two-position two-way solenoid valve.
6. A control method of an automatic vehicle tire inflation/deflation device using the automatic vehicle tire inflation/deflation device according to any one of claims 1 to 5, comprising the steps of:
step 1: monitoring the ambient temperature, the road surface temperature and the road surface gradient through the sensor, monitoring the real-time tire pressure of the tire through the tire pressure monitoring device, and transmitting the real-time tire pressure to the control unit;
step 2: comparing the real-time tire pressure with a tire pressure standard in the control unit:
if the real-time tire pressure is smaller than the tire pressure standard, the control unit selects the following inflation mode:
the control unit controls the connection of the air inlet stations of the pressurizing control valve and the air charging and discharging control valve, simultaneously controls the opening of the outlet control valve corresponding to the tire with insufficient tire pressure, and high-pressure air sequentially passes through the pressurizing control valve, the air charging and discharging control valve, the air passage distribution device, the outlet control valve, the knuckle air passage, the sealing air chamber, the half-shaft air passage and the rim air passage from an air source to finally communicate with the tire;
if the real-time tire pressure is greater than the tire pressure standard, the control unit selects the following deflation mode:
the control unit controls the pressurization control valve to be closed, controls the air outlet station of the air charging and discharging control valve to be conducted, simultaneously controls the outlet control valve corresponding to the tire with the too high tire pressure to be opened, and air flows out of the tire and is discharged into the atmosphere through the air charging and discharging control valve after sequentially passing through the rim air passage, the half-shaft air passage, the sealed air chamber, the knuckle air passage, the outlet control valve and the air passage distribution device.
7. The method for controlling an automatic tire inflation/deflation device for a vehicle of claim 6, wherein the tire pressure standard is divided into three modes according to different road conditions:
when the road condition is in highway mode: the tire pressure standard is 600KPa;
when the road condition is in the off-road mode: the tire pressure standard is 450KPa;
when the road condition is in a soft mode: the tire pressure standard is 300KPa.
8. The control method of an automatic tire inflation/deflation device for a vehicle of claim 6, wherein in the inflation mode, the opening degree of the outlet control valve satisfies the following condition:
if 75% P w ＜P v ＜P w When ov=40%;
if 50% P w ≤P v ＜75％P w When ov=75%;
if P v ≤50％P w When ov=100%;
wherein P is v For real-time tire pressure, P w The valve opening degree of the outlet control valve is OV, which is the tire pressure standard;
in the deflation mode, the opening degree of the valve of the outlet control valve meets the following conditions:
if P w ＜P v ＜125％P w When ov=40%;
if P v ≥150％P w When ov=75%;
if 125% P w ≤P v ＜150％P w When ov=100%;
wherein P is v For real-time tire pressure, P w And the OV is the opening degree of the outlet control valve.
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| CN201910465983.9A CN110154653B (en) | 2019-05-31 | 2019-05-31 | Automatic inflation and deflation device for vehicle tires and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113263873B (en) * | 2020-02-17 | 2023-06-02 | 建大工业股份有限公司 | Tire assembly and method for improving tire grip |
| CN111688419B (en) * | 2020-06-30 | 2023-07-04 | 吉林大学 | Direct and indirect type hybrid tire pressure monitoring and adjusting system and control method thereof |
| CN113879049A (en) * | 2021-11-04 | 2022-01-04 | 一汽解放汽车有限公司 | Tire pressure monitoring method, tire pressure monitoring device, computer equipment and storage medium |
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