CN112455409A - Control method and device for vacuum pump - Google Patents
Control method and device for vacuum pump Download PDFInfo
- Publication number
- CN112455409A CN112455409A CN202011205645.0A CN202011205645A CN112455409A CN 112455409 A CN112455409 A CN 112455409A CN 202011205645 A CN202011205645 A CN 202011205645A CN 112455409 A CN112455409 A CN 112455409A
- Authority
- CN
- China
- Prior art keywords
- vacuum pump
- current
- vehicle
- control strategy
- altitude
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/72—Electrical control in fluid-pressure brake systems in vacuum systems or vacuum booster units
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
Abstract
The invention provides a control method and a device of a vacuum pump, wherein the method comprises the following steps: acquiring a first current pumping rate of the vacuum pump, and acquiring pumping time of the vacuum pump when the first current pumping rate is determined to be smaller than a first reference rate; if the pumping time is determined to be longer than the reference time, acquiring the current vacuum degree of the vacuum pump; determining a current vacuum degree interval range to which the current vacuum degree belongs, determining the current altitude of an area where the vehicle is located based on the current vacuum degree interval range, and searching a corresponding current vacuum pump control strategy according to the current altitude; controlling the vacuum pump based on a current vacuum pump control strategy; therefore, under the condition that the vehicle cost is not increased, the specific altitude of the area where the vehicle is located is accurately judged by detecting the air extraction rate and the vacuum degree of the vacuum pump, and then the vacuum pump control strategy corresponding to the altitude is executed, so that the vehicle can achieve the best braking performance in the plateau areas with different altitudes, and the running safety of the vehicle is ensured.
Description
Technical Field
The invention belongs to the technical field of automobile control, and particularly relates to a control method and device of a vacuum pump.
Background
When a vehicle drives into a plateau area from a plain, the air pressure is reduced, the air extraction rate of the vehicle provided with the electric vacuum pump is reduced, if the vacuum pump control strategy of the plateau area is continuously maintained, the vacuum pump can continuously work, and the vacuum pump is extremely easy to damage under the condition, so that potential safety hazards are brought to the vehicle.
In order to ensure that a vehicle can normally run on both plain and plateau, a vacuum pump strategy in plateau areas is generally set to cope with plateau working conditions. The prior art includes two ways: firstly, an atmospheric pressure sensor is added in a vehicle, and the altitude is judged according to data measured by the atmospheric pressure sensor to determine whether to execute a vacuum pump control strategy in a plateau area. And secondly, judging whether the vehicle enters the plateau or not according to the air extraction time of the vacuum pump, and further determining whether to execute a vacuum pump control strategy in the plateau area or not.
But the first approach would add to the vehicle's body; the second method can only judge whether the vehicle enters a high altitude area according to the air pumping time of the vacuum pump, and can not accurately identify the specific altitude. A control strategy is adopted for areas with different altitudes, so that the braking performance cannot exert the maximum efficiency, and the braking safety of the vehicle is influenced to a certain extent.
Disclosure of Invention
Aiming at the problems in the prior art, the embodiment of the invention provides a control method and a control device of a vacuum pump, which are used for solving the technical problem that in the prior art, when a vehicle enters a high-altitude area, the optimal braking performance of the vehicle cannot be achieved on the premise of not increasing the cost, so that the braking potential safety hazard exists in the vehicle.
The invention provides a control method of a vacuum pump, which comprises the following steps:
acquiring a first current pumping rate of a vacuum pump, and when the first current pumping rate is determined to be smaller than a preset first reference rate, continuously acquiring the pumping time of the vacuum pump; the first reference speed is the minimum pumping speed of the vacuum pump when the vehicle is in a plateau region;
if the pumping time is determined to be longer than the preset reference time, acquiring the current vacuum degree of the vacuum pump;
determining a current vacuum degree interval range to which the current vacuum degree belongs, determining the current altitude of an area where a vehicle is located based on the current vacuum degree interval range, and searching a corresponding current vacuum pump control strategy in a preset mapping table according to the current altitude; the corresponding relation between the altitude and the vacuum pump control strategy is stored in the preset table in advance; different altitude heights correspond to different vacuum pump control strategies;
controlling the vacuum pump based on the current vacuum pump control strategy.
Optionally, determining a current vacuum degree interval range to which the current vacuum degree belongs, determining a current altitude of an area where the vehicle is located based on the current vacuum degree interval range, and searching a corresponding current vacuum pump control strategy in a preset mapping table according to the current altitude, includes:
judging whether the current vacuum degree interval range to which the current vacuum degree belongs is (P2-10, P2);
if the current vacuum degree interval range is determined to be (P2-10, P2), determining the current altitude of the area where the vehicle is located to be 1 km;
searching a corresponding current vacuum pump control strategy when the current altitude is 1km in a preset mapping table; wherein the current vacuum pump control strategy comprises:
when the vacuum degree of a vacuum pump of the vehicle is greater than or equal to P2-10, controlling the vacuum pump to stop working;
when the vacuum degree of the vacuum pump is less than or equal to P1, controlling the vacuum pump to be started; the P1 is the threshold value for turning on the vacuum pump when the vehicle is in the leveling zone, and the P2 is the threshold value for turning off the vacuum pump when the vehicle is in the leveling zone.
Optionally, determining a current vacuum degree interval range to which the current vacuum degree belongs, determining a current altitude of an area where the vehicle is located based on the current vacuum degree interval range, and determining a corresponding current vacuum pump control strategy according to the current altitude, includes:
judging whether the current vacuum degree interval range to which the current vacuum degree belongs is (P2-17, P2-10 ];
if the current vacuum degree interval range is determined to be (P2-17, P2-10), determining the current altitude of the area where the vehicle is located to be 2 km;
searching a corresponding current vacuum pump control strategy when the current altitude is 2km in a preset mapping table; wherein the current vacuum pump control strategy comprises:
when the vacuum degree of a vacuum pump of the vehicle is greater than or equal to P2-17, controlling the vacuum pump to stop working;
when the vacuum degree of the vacuum pump is less than or equal to P1-7, controlling the vacuum pump to be started; the P1 is the threshold value for turning on the vacuum pump when the vehicle is in the leveling zone, and the P2 is the threshold value for turning off the vacuum pump when the vehicle is in the leveling zone.
Optionally, determining a current vacuum degree interval range to which the current vacuum degree belongs, determining a current altitude of an area where the vehicle is located based on the current vacuum degree interval range, and determining a corresponding current vacuum pump control strategy according to the current altitude, includes:
judging whether the current vacuum degree interval range of the current vacuum degree is (P2-25, P2-17), if the current vacuum degree interval range is (P2-25, P2-17), determining that the current altitude of the area where the vehicle is located is 3 km;
searching a corresponding current vacuum pump control strategy when the current altitude is 3km in a preset mapping table; wherein the current vacuum pump control strategy comprises:
when the vacuum degree of a vacuum pump of the vehicle is greater than or equal to P2-25, controlling the vacuum pump to stop working;
when the vacuum degree of the vacuum pump is less than or equal to P1-15, controlling the vacuum pump to be started; the P1 is the threshold value for turning on the vacuum pump when the vehicle is in the leveling zone, and the P2 is the threshold value for turning off the vacuum pump when the vehicle is in the leveling zone.
Optionally, determining a current vacuum degree interval range to which the current vacuum degree belongs, determining a current altitude of an area where the vehicle is located based on the current vacuum degree interval range, and determining a corresponding current vacuum pump control strategy according to the current altitude, includes:
judging whether the current vacuum degree interval range to which the current vacuum degree belongs is (P2-30, P2-25);
if the current vacuum degree interval range is determined to be (P2-30, P2-25), determining the current altitude of the area where the vehicle is located to be 4 km;
searching a corresponding current vacuum pump control strategy when the current altitude is 4km in a preset mapping table; wherein the current vacuum pump control strategy comprises:
when the vacuum degree of a vacuum pump of the vehicle is greater than or equal to P2-30, controlling the vacuum pump to stop working;
when the vacuum degree of the vacuum pump is less than or equal to P1-15, controlling the vacuum pump to be started; p1 is the threshold value for turning on the vacuum pump when the vehicle is in the flat zone, and P2 is the threshold value for turning off the vacuum pump when the vehicle is in the flat zone.
Optionally, before controlling the vacuum pump based on the current vacuum pump control strategy, the method further includes:
acquiring a second current pumping speed of the vacuum pump;
judging whether the second current pumping rate is greater than a preset second reference rate, and if the second current pumping rate is determined to be greater than or equal to the second reference rate, updating the current vacuum pump control strategy to an initial vacuum pump control strategy; the initial vacuum pump strategy is a vacuum pump control strategy corresponding to the vehicle in the leveling zone, and the second reference speed is the maximum pumping speed of the vacuum pump when the vehicle is in the leveling zone.
Optionally, if it is determined that the second current pumping rate is smaller than the second reference rate, the method further includes:
and judging whether the current second air extraction rate is greater than or equal to a first reference rate, and if the current second air extraction rate is determined to be less than the first reference rate, executing a vacuum pump control strategy corresponding to the vehicle in the area with the altitude height.
Optionally, the method further comprises:
and when the vacuum pump is controlled based on the current vacuum pump control strategy, if the vacuum degree sensor or the brake pedal sensor is determined to be in fault, the current vacuum pump control strategy is switched to a standby control strategy.
Optionally, the method further comprises:
and when the vacuum pump is controlled based on the current vacuum pump control strategy, if the vacuum pump is determined to have a fault, switching the current vacuum pump control strategy into a failure control strategy.
The present invention also provides a control apparatus for a vacuum pump, the apparatus comprising:
the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring a first current pumping rate of a vacuum pump, and when the first current pumping rate is determined to be smaller than a preset first reference rate, the acquisition unit continues to acquire pumping duration of the vacuum pump; the first reference speed is the minimum pumping speed of the vacuum pump when the vehicle is in a plateau region; if the pumping time is determined to be longer than the preset reference time, acquiring the current vacuum degree of the vacuum pump;
the determining unit is used for determining the range of the current vacuum degree interval to which the current vacuum degree belongs, determining the current altitude of the area where the vehicle is located based on the range of the current vacuum degree interval, and searching a corresponding current vacuum pump control strategy in a preset mapping table according to the current altitude; the corresponding relation between the altitude and the vacuum pump control strategy is stored in the preset table in advance; different altitude heights correspond to different vacuum pump control strategies;
a control unit for controlling the vacuum pump based on the current vacuum pump control strategy.
The invention provides a control method and a device of a vacuum pump, wherein the method comprises the following steps: acquiring a first current pumping rate of a vacuum pump, and when the first current pumping rate is determined to be smaller than a preset first reference rate, continuously acquiring the pumping time of the vacuum pump; the first reference speed is the minimum pumping speed of the vacuum pump when the vehicle is in a plateau region; if the pumping time is determined to be longer than the preset reference time, acquiring the current vacuum degree of the vacuum pump; determining a current vacuum degree interval range to which the current vacuum degree belongs, determining the current altitude of an area where a vehicle is located based on the current vacuum degree interval range, and searching a corresponding current vacuum pump control strategy in a preset mapping table according to the current altitude; the corresponding relation between the altitude and the vacuum pump control strategy is stored in the preset table in advance; different altitude heights correspond to different vacuum pump control strategies; controlling the vacuum pump based on the current vacuum pump control strategy; therefore, under the condition that the vehicle cost is not increased, the specific altitude of the area where the vehicle is located is accurately judged by detecting the air extraction rate and the vacuum degree of the vacuum pump, and then the vacuum pump control strategy corresponding to the altitude is executed, so that the vehicle can achieve the best braking performance in the plateau areas with different altitudes, and the vehicle running safety is ensured.
Drawings
FIG. 1 is a schematic flow chart of a method for controlling a vacuum pump according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a vacuum pump control device according to an embodiment of the present invention.
Detailed Description
The invention provides a control method and a control device of a vacuum pump, aiming at solving the technical problem that in the prior art, when a vehicle enters a high-altitude area, the optimal braking performance of the vehicle cannot be achieved on the premise of not increasing the cost, so that the vehicle has the potential safety hazard.
The technical solution of the present invention is further described in detail by the accompanying drawings and the specific embodiments.
Example one
The present embodiment provides a control method of a vacuum pump, as shown in fig. 1, the method includes:
s110, acquiring a first current air pumping rate of a vacuum pump, and when the first current air pumping rate is determined to be smaller than a preset first reference rate, continuously acquiring the air pumping duration of the vacuum pump; the first reference speed is the minimum pumping speed of the vacuum pump when the vehicle is in a plateau region;
as the atmospheric pressure is regularly reduced along with the rise of the altitude, the air pumping speed of the vacuum pump is regularly changed, the average altitude is increased by 1Km, and the atmospheric pressure is reduced by about 10 Kpa. Based on this, when the vehicle runs, the first current air extraction rate of the vacuum pump is obtained, when the first current air extraction rate is determined to be smaller than the preset first reference rate, the air extraction time length of the vacuum pump is continuously obtained, and if the air extraction time length is smaller than or equal to the preset reference time length, the vacuum pump of the vehicle is determined to work normally at the moment, and the vehicle runs normally.
Wherein, the first reference speed is the minimum pumping speed of the vacuum pump when the vehicle is in the leveling area, and can be 3 kpa/s; the preset reference time period may be 200 ms.
S111, if the pumping time is determined to be longer than a preset reference time, acquiring the current vacuum degree of the vacuum pump;
if the pumping time is determined to be longer than the preset reference time, it is determined that the vacuum pump is abnormal at the moment, the current vacuum degree of the vacuum pump needs to be obtained, and then further judgment is made according to the current vacuum degree.
S112, determining a current vacuum degree interval range to which the current vacuum degree belongs, determining the current altitude of the area where the vehicle is located based on the current vacuum degree interval range, and searching a corresponding current vacuum pump control strategy in a preset mapping table according to the current altitude; the corresponding relation between the altitude and the vacuum pump control strategy is stored in the preset table in advance; different altitude heights correspond to different vacuum pump control strategies;
after the current vacuum degree is obtained, judging the current vacuum degree interval range to which the current vacuum degree belongs, determining the current altitude of the area where the vehicle is located based on the current vacuum degree interval range, and searching the corresponding current vacuum pump control strategy in a preset mapping table according to the current altitude. The corresponding relation between the altitude and the vacuum pump control strategy is stored in a preset table in advance; different altitude heights correspond to different vacuum pump control strategies; therefore, different vacuum pump control strategies are designated according to different altitudes, and the vehicle can achieve the best braking performance at different altitudes.
And after the current vacuum pump control strategy is found, controlling the vacuum pump to stop working, and updating the previous control strategy of the current vacuum pump control strategy into the current vacuum pump control strategy.
And moreover, because the altitude and the vacuum pump control strategy are pre-stored in the mapping table, after the altitude of the area where the vehicle is located is determined, the corresponding vacuum pump control strategy can be quickly called from the mapping table according to the altitude, and the control efficiency is improved.
Here, since most of domestic cities are below an altitude of 4Km, the mapping table in the present embodiment stores in advance vacuum pump control strategies corresponding to altitudes of 1Km, 2Km, 3Km, and 4Km, respectively. Of course, the mapping table of this embodiment may also store the altitude greater than 4Km and the corresponding vacuum pump policy in advance.
Specifically, whether the current vacuum degree interval range of the current vacuum degree belongs to is (P2-10, P2) or not is judged, if the current vacuum degree interval range is determined to be (P2-10, P2), the current altitude of the area where the vehicle is located is determined to be 1km, and a corresponding current vacuum pump control strategy when the current altitude is 1km is searched in a preset mapping table, wherein the corresponding current vacuum pump control strategy when the altitude is 1km comprises the following steps:
when the vacuum degree of a vacuum pump of the vehicle is greater than or equal to P2-10, controlling the vacuum pump to stop working;
and when the vacuum degree of the vacuum pump is less than or equal to P1, controlling the vacuum pump to be started. P1 is the threshold for turning on the vacuum pump when the vehicle is in the flat zone, and P2 is the threshold for turning off the vacuum pump when the vehicle is in the flat zone.
Here, the value of P1 may be 60kpa and the value of P2 may be 77kpa, determined based on the vehicle braking performance requirements and the extraction capacity of the vacuum pump.
As an optional embodiment, if the current vacuum degree interval range to which the current vacuum degree belongs is determined not to belong to (P2-10, P2), continuously judging whether the current vacuum degree interval range to which the current vacuum degree belongs is (P2-17, P2-10), if the current vacuum degree interval range is determined to be (P2-17, P2-10), determining the current altitude of the area where the vehicle is located to be 2km, and searching a current vacuum pump control strategy corresponding to the current altitude of 2km in a preset mapping table, wherein the current vacuum pump control strategy corresponding to the altitude of 2km comprises:
when the vacuum degree of the vacuum pump of the vehicle is greater than or equal to P2-17, controlling the vacuum pump to stop working;
and when the vacuum degree of the vacuum pump is less than or equal to P1-7, controlling the vacuum pump to be started.
As an optional embodiment, if the current vacuum degree interval range to which the current vacuum degree belongs is determined not to belong to (P2-17, P2-10), judging whether the current vacuum degree interval range to which the current vacuum degree belongs is (P2-25, P2-17), if the current vacuum degree interval range is determined to be (P2-25, P2-17), determining the current altitude of the area where the vehicle is located to be 3km, and searching a current vacuum pump control strategy corresponding to the current altitude of 3km in a preset mapping table, wherein the current vacuum pump control strategy corresponding to the altitude of 3km comprises:
when the vacuum degree of a vacuum pump of the vehicle is greater than or equal to P2-25, controlling the vacuum pump to stop working;
and when the vacuum degree of the vacuum pump is less than or equal to P1-15, controlling the vacuum pump to be started.
As an optional embodiment, if the current vacuum degree interval range to which the current vacuum degree belongs is determined not to belong (P2-25, P2-17), continuously judging whether the current vacuum degree interval range to which the current vacuum degree belongs is (P2-30, P2-25), if the current vacuum degree interval range is determined to be (P2-30, P2-25), determining the current altitude of the area where the vehicle is located to be 4km, and searching a current vacuum pump control strategy corresponding to the current altitude of 4km in a preset mapping table, wherein the current vacuum pump control strategy corresponding to the altitude of 4km comprises:
when the vacuum degree of a vacuum pump of the vehicle is greater than or equal to P2-30, controlling the vacuum pump to stop working;
and when the vacuum degree of the vacuum pump is less than or equal to P1-15, controlling the vacuum pump to be started.
It should be noted that, after updating the current vacuum pump control strategy each time, that is, before controlling the vacuum pump based on the current vacuum pump control strategy, the pumping rate of the vacuum pump needs to be rechecked, which specifically includes:
acquiring a second current pumping speed of the vacuum pump;
judging whether the second current pumping rate is greater than a preset second reference rate, and if the second current pumping rate is determined to be greater than the second reference rate, updating the current vacuum pump control strategy to the initial vacuum pump control strategy; the initial vacuum pump strategy is a vacuum pump control strategy corresponding to the vehicle in the leveling area, and the second reference speed is the maximum pumping speed of the vacuum pump when the vehicle is in the leveling area; the second reference speed rate may be 4 kpa/s.
That is to say, when the pumping rate of the vacuum pump is rechecked, and when it is determined whether the second current pumping rate is greater than or equal to the preset second reference rate, it indicates that the vehicle enters the plain area at that time, the current vacuum pump control strategy is switched to the vacuum pump control strategy corresponding to the plain area.
Here, the plain area corresponds to your vacuum pump control strategy as follows: when the current vacuum degree of the vacuum pump is less than P1, controlling the vacuum pump to be started; and when the current vacuum degree is more than P2, controlling the vacuum pump to be closed.
As an alternative embodiment, if it is determined that the second current pumping rate is smaller than the second reference rate, the method further comprises:
and judging whether the current second air extraction rate is greater than or equal to the first reference rate, and if the current second air extraction rate is determined to be less than the first reference rate, executing a vacuum pump control strategy corresponding to the vehicle in the area with the altitude height. That is, if it is determined that the current second pumping rate is smaller than the first reference rate, the subsequent vacuum pump control strategy in step S110 when the current first pumping rate is smaller than the first reference rate is continuously executed, that is, the corresponding vacuum pump control strategy of the vehicle at different altitudes is continuously executed, which is not described herein again. Here, the vacuum pump control strategies corresponding to the different altitudes described in steps S110 to S112 may be referred to as normal control strategies.
Thus, when the vehicle drives from the high-altitude area to the low-altitude area (both the high-altitude area and the low-altitude area belong to the plateau), the vacuum pump control strategy corresponding to the altitude area can be selected, so that the braking performance of the vehicle is always kept in the optimal state.
S113, controlling the vacuum pump based on the current vacuum pump control strategy.
And after the vacuum pump control strategy corresponding to the altitude of the area where the vehicle is located is determined, controlling the vacuum pump based on the current vacuum pump control strategy.
Namely, the altitude is 1km, and when the vacuum degree of a vacuum pump of the vehicle is greater than or equal to P2-10, the vacuum pump is controlled to stop working; and when the vacuum degree of the vacuum pump is less than or equal to P1, controlling the vacuum pump to be started.
The altitude is 2km, and when the vacuum degree of a vacuum pump of the vehicle is greater than or equal to P2-17, the vacuum pump is controlled to stop working; and when the vacuum degree of the vacuum pump is less than or equal to P1-7, controlling the vacuum pump to be started.
The altitude is 3km, and when the vacuum degree of a vacuum pump of the vehicle is greater than or equal to P2-25, the vacuum pump is controlled to stop working; and when the vacuum degree of the vacuum pump is less than or equal to P1-15, controlling the vacuum pump to be started.
The altitude is 4km, and when the vacuum degree of a vacuum pump of the vehicle is greater than or equal to P2-30, the vacuum pump is controlled to stop working; and when the vacuum degree of the vacuum pump is less than or equal to P1-15, controlling the vacuum pump to be started.
It should be noted that the values in the ranges of the vacuum degrees set in the present application are empirical values actually applied in the present application, and may be adjusted according to actual conditions in other vehicle applications. For example, for the range of vacuum degree intervals (P2-10, P2), P2-10 can be adjusted to P2-8 or P2-11, and for other ranges of vacuum degree intervals, the specific values can be left and right 1 or 2 Kpa floating.
Here, the above-mentioned control strategies are all implemented when the respective components (the vacuum pump, the vacuum pump sensor, and the brake pedal sensor) can operate normally, and when the vacuum pump, the vacuum pump sensor, and the brake pedal sensor fail, the method further includes:
when the vacuum pump is controlled based on the current vacuum pump control strategy, if the vacuum degree sensor is determined to be in fault, the current vacuum pump control strategy is switched to a standby control strategy.
Here, for example, the standby control policy may include: and controlling the vacuum pump to be started based on a preset period, wherein the preset period can be 5-10 s.
And when the vacuum pump is controlled based on the current vacuum pump control strategy, if the vacuum pump or the brake pedal sensor is determined to be in fault, switching the current vacuum pump control strategy into a failure control strategy.
If it is determined that the vacuum pump fails, it is determined that the vacuum pump cannot normally operate, and the failure control strategy may be to control the vacuum pump to be turned off and send an alarm signal to an instrument panel to prompt an operator that the vacuum pump fails at the time.
Similarly, when the standby control strategy is used for controlling the vacuum pump, if the vacuum pump or the brake pedal sensor is determined to have a fault, the standby control strategy is switched to the failure control strategy; and if the fault of the vacuum pump sensor is determined to be repaired, switching the standby control strategy into the normal control strategy (the control strategies provided in the steps S110 to S112).
When the failure control strategy is used for controlling the vacuum pump, if the failure repair of the vacuum pump or the brake pedal sensor is determined, the failure control strategy is switched to a standby control strategy; and if the vacuum pump is determined and the fault repair of the brake pedal sensor is completed, switching the failure control strategy into a normal control strategy.
Therefore, under the condition that the vehicle cost is not increased, the specific altitude of the area where the vehicle is located is accurately judged by detecting the air extraction rate and the vacuum degree of the vacuum pump, and then the vacuum pump control strategy corresponding to the altitude is executed, so that the vehicle can achieve the best braking performance in plateau areas with different altitudes, and the vehicle running safety is ensured. And this control strategy can be as a redundant control strategy, utilizes atmospheric pressure sensor to detect the vacuum when the vehicle, and then when controlling the vacuum pump, if atmospheric pressure sensor breaks down, can switch to the vacuum pump control strategy that this embodiment provided, ensures that the vacuum pump can not scrap because of long-time work, avoids influencing braking safety.
Based on the same inventive concept, the invention also provides a control device of the vacuum pump, which is detailed in embodiment II.
Example two
The present embodiment provides a control apparatus for a vacuum pump, as shown in fig. 2, the apparatus including: an acquisition unit 21, a determination unit 22, and a control unit 23; wherein the content of the first and second substances,
the acquiring unit 21 is configured to acquire a first current pumping rate of the vacuum pump, and when it is determined that the first current pumping rate is smaller than a preset first reference rate, continue to acquire a pumping duration of the vacuum pump; the first reference speed is the minimum pumping speed of the vacuum pump when the vehicle is in a plateau region; if the pumping time is determined to be longer than the preset reference time, acquiring the current vacuum degree of the vacuum pump;
the determining unit 22 is configured to determine a current vacuum degree interval range to which the current vacuum degree belongs, determine a current altitude of an area where the vehicle is located based on the current vacuum degree interval range, and search a corresponding current vacuum pump control strategy in a preset mapping table according to the current altitude; the corresponding relation between the altitude and the vacuum pump control strategy is stored in the preset table in advance; different altitude heights correspond to different vacuum pump control strategies;
a control unit 23 for controlling the vacuum pump based on the current vacuum pump control strategy.
Specifically, as the atmospheric pressure is regularly reduced along with the rise of the altitude, the air pumping rate of the vacuum pump is regularly changed, the average altitude is increased by 1Km, and the atmospheric pressure is reduced by about 10 Kpa. Based on this, when the vehicle runs, the obtaining unit 21 is configured to obtain a first current pumping rate of the vacuum pump, when it is determined that the first current pumping rate is smaller than a preset first reference rate, continue to obtain a pumping time length of the vacuum pump, and if the pumping time length is smaller than or equal to the preset reference time length, determine that the vacuum pump of the vehicle is working normally at this time, and the vehicle runs normally.
Wherein, the first reference speed is the minimum pumping speed of the vacuum pump when the vehicle is in the leveling area, and can be 3 kpa/s; the preset reference time period may be 200 ms.
If it is determined that the pumping time is longer than the preset reference time, it is determined that the vacuum pump may be abnormal at this time, the obtaining unit 21 needs to obtain the current vacuum degree of the vacuum pump, and further judgment is performed according to the current vacuum degree.
After the current vacuum degree is obtained, the determining unit 22 is configured to determine a current vacuum degree interval range to which the current vacuum degree belongs, determine a current altitude of an area where the vehicle is located based on the current vacuum degree interval range, and search a corresponding current vacuum pump control strategy in a preset mapping table according to the current altitude. The corresponding relation between the altitude and the vacuum pump control strategy is stored in a preset table in advance; different altitude heights correspond to different vacuum pump control strategies; therefore, different vacuum pump control strategies are designated according to different altitudes, and the vehicle can achieve the best braking performance at different altitudes.
After the current vacuum pump control strategy is found, the control unit 23 controls the vacuum pump to stop working, and updates the previous control strategy of the current vacuum pump control strategy to the current vacuum pump control strategy.
And moreover, because the altitude and the vacuum pump control strategy are pre-stored in the mapping table, after the altitude of the area where the vehicle is located is determined, the corresponding vacuum pump control strategy can be quickly called from the mapping table according to the altitude, and the control efficiency is improved.
Here, since most of domestic cities are below an altitude of 4Km, the mapping table in the present embodiment stores in advance vacuum pump control strategies corresponding to altitudes of 1Km, 2Km, 3Km, and 4Km, respectively. Of course, the mapping table of this embodiment may also store the altitude greater than 4Km and the corresponding vacuum pump policy in advance.
Specifically, the determining unit 22 is configured to determine whether a current vacuum degree interval range to which the current vacuum degree belongs is (P2-10, P2), determine that the current altitude of an area where the vehicle is located is 1km if the current vacuum degree interval range is (P2-10, P2), and search a preset mapping table for a current vacuum pump control strategy corresponding to the current altitude of 1km, where the current vacuum pump control strategy corresponding to the altitude of 1km includes:
when the vacuum degree of a vacuum pump of the vehicle is greater than or equal to P2-10, controlling the vacuum pump to stop working;
and when the vacuum degree of the vacuum pump is less than or equal to P1, controlling the vacuum pump to be started. P1 is the threshold for turning on the vacuum pump when the vehicle is in the flat zone, and P2 is the threshold for turning off the vacuum pump when the vehicle is in the flat zone.
Here, the value of P1 may be 60kpa and the value of P2 may be 77kpa, determined based on the vehicle braking performance requirements and the extraction capacity of the vacuum pump.
As an optional embodiment, the determining unit 22 continues to determine whether the current vacuum degree interval range to which the current vacuum degree belongs is (P2-17, P2-10) if it is determined that the current vacuum degree interval range to which the current vacuum degree belongs does not belong (P2-10, P2], determines that the current altitude of the area in which the vehicle is located is 2km if it is determined that the current vacuum degree interval range is (P2-17, P2-10], and searches a preset mapping table for a current vacuum pump control strategy corresponding to the current altitude of 2km, wherein the current vacuum pump control strategy corresponding to the altitude of 2km includes:
when the vacuum degree of the vacuum pump of the vehicle is greater than or equal to P2-17, controlling the vacuum pump to stop working;
and when the vacuum degree of the vacuum pump is less than or equal to P1-7, controlling the vacuum pump to be started.
As an optional embodiment, the determining unit 22 determines whether the current vacuum degree interval range to which the current vacuum degree belongs is (P2-25, P2-17) if it is determined that the current vacuum degree interval range to which the current vacuum degree belongs does not belong (P2-17, P2-10], determines the current altitude of the area in which the vehicle is located to be 3km if it is determined that the current vacuum degree interval range is (P2-25, P2-17], and searches a preset mapping table for a current vacuum pump control strategy corresponding to the current altitude of 3km, wherein the current vacuum pump control strategy corresponding to the altitude of 3km includes:
when the vacuum degree of a vacuum pump of the vehicle is greater than or equal to P2-25, controlling the vacuum pump to stop working;
and when the vacuum degree of the vacuum pump is less than or equal to P1-15, controlling the vacuum pump to be started.
As an alternative embodiment, the determining unit 22 continues to determine whether the current vacuum degree interval range to which the current vacuum degree belongs is (P2-30, P2-25) if it is determined that the current vacuum degree interval range to which the current vacuum degree belongs does not belong (P2-25, P2-17], determines that the current altitude of the area in which the vehicle is located is 4km if it is determined that the current vacuum degree interval range is (P2-30, P2-25), and searches a preset mapping table for a current vacuum pump control strategy corresponding to the current altitude of 4km, wherein the current vacuum pump control strategy corresponding to the altitude of 4km includes:
when the vacuum degree of a vacuum pump of the vehicle is greater than or equal to P2-30, controlling the vacuum pump to stop working;
and when the vacuum degree of the vacuum pump is less than or equal to P1-15, controlling the vacuum pump to be started.
It is to be noted that, after each time the current vacuum pump control strategy is updated, i.e. before the vacuum pump is controlled based on the current vacuum pump control strategy, the pumping rate of the vacuum pump needs to be rechecked, the determining unit 22 is further configured to:
acquiring a second current pumping speed of the vacuum pump;
judging whether the second current pumping rate is greater than a preset second reference rate, and if the second current pumping rate is determined to be greater than or equal to the second reference rate, updating the current vacuum pump control strategy to the initial vacuum pump control strategy; the initial vacuum pump strategy is a vacuum pump control strategy corresponding to the vehicle in the leveling area, and the second reference speed is the maximum pumping speed of the vacuum pump when the vehicle is in the leveling area; the second reference speed rate may be 4 kpa/s.
That is to say, when the pumping rate of the vacuum pump is rechecked, and when it is determined whether the second current pumping rate is greater than the preset second reference rate, it indicates that the vehicle enters the plain area at that time, the current vacuum pump control strategy is switched to the vacuum pump control strategy corresponding to the plain area.
Here, the plain area corresponds to your vacuum pump control strategy as follows: when the current vacuum degree of the vacuum pump is less than P1, controlling the vacuum pump to be started; and when the current vacuum degree is more than P2, controlling the vacuum pump to be closed.
If the second current pumping rate is determined to be less than the second reference rate, the method further comprises:
and judging whether the current second air extraction rate is greater than or equal to the first reference rate, and if the current second air extraction rate is determined to be less than the first reference rate, continuously executing a vacuum pump control strategy corresponding to the altitude to which the vehicle belongs. That is to say, the subsequent vacuum pump control strategy when the current first pumping rate is smaller than the first reference rate is continued, that is, the corresponding vacuum pump control strategy of the vehicle at different altitudes is continued to be executed, which is not described herein again. The vacuum pump control strategy corresponding to the different altitudes described above may be referred to as a normal control strategy.
Thus, when the vehicle drives from the high-altitude area to the low-altitude area (both the high-altitude area and the low-altitude area belong to the plateau), the vacuum pump control strategy corresponding to the altitude area can be selected, so that the braking performance of the vehicle is always kept in the optimal state.
After the vacuum pump control strategy corresponding to the altitude of the area where the vehicle is located is determined, the control unit 23 controls the vacuum pump based on the current vacuum pump control strategy.
Namely, the altitude is 1km, and when the vacuum degree of a vacuum pump of the vehicle is greater than or equal to P2-10, the vacuum pump is controlled to stop working; and when the vacuum degree of the vacuum pump is less than or equal to P1, controlling the vacuum pump to be started.
The altitude is 2km, and when the vacuum degree of a vacuum pump of the vehicle is greater than or equal to P2-17, the vacuum pump is controlled to stop working; and when the vacuum degree of the vacuum pump is less than or equal to P1-7, controlling the vacuum pump to be started.
The altitude is 3km, and when the vacuum degree of a vacuum pump of the vehicle is greater than or equal to P2-25, the vacuum pump is controlled to stop working; and when the vacuum degree of the vacuum pump is less than or equal to P1-15, controlling the vacuum pump to be started.
The altitude is 4km, and when the vacuum degree of a vacuum pump of the vehicle is greater than or equal to P2-30, the vacuum pump is controlled to stop working; and when the vacuum degree of the vacuum pump is less than or equal to P1-15, controlling the vacuum pump to be started.
It should be noted that the values in the ranges of the vacuum degree intervals set in this embodiment are empirical values actually applied in this application, and may be adjusted according to actual conditions in other vehicle applications. For example, for the range of vacuum degree interval (P2-10, P2), P2-10 can be adjusted to P2-8 or P2-11, and for other ranges of vacuum degree interval, the specific values can be left and right 1 or 2 Kpa floating.
Here, the above-mentioned control strategies are all implemented when the respective components (the vacuum pump, the vacuum pump sensor, and the brake pedal sensor) can operate normally, and when the vacuum pump, the vacuum pump sensor, and the brake pedal sensor fail, the control unit 23 is further configured to:
when the vacuum pump is controlled based on the current vacuum pump control strategy, if the vacuum degree sensor is determined to be in fault, the current vacuum pump control strategy is switched to a standby control strategy.
Here, for example, the standby control policy may include: and controlling the vacuum pump to be started based on a preset period, wherein the preset period can be 5-10 s.
And when the vacuum pump is controlled based on the current vacuum pump control strategy, if the vacuum pump or the brake pedal sensor is determined to be in fault, switching the current vacuum pump control strategy into a failure control strategy.
If it is determined that the vacuum pump fails, it is determined that the vacuum pump cannot normally operate, and the failure control strategy may be to control the vacuum pump to be turned off and send an alarm signal to an instrument panel to prompt an operator that the vacuum pump fails at the time.
Similarly, when the standby control strategy is used for controlling the vacuum pump, if the vacuum pump or the brake pedal sensor is determined to have a fault, the standby control strategy is switched to the failure control strategy; and if the fault of the vacuum pump sensor is determined to be repaired, switching the standby control strategy into the normal control strategy (the control strategies provided in the steps S110 to S112).
When the failure control strategy is used for controlling the vacuum pump, if the failure repair of the vacuum pump or the brake pedal sensor is determined, the failure control strategy is switched to a standby control strategy; and if the vacuum pump is determined and the fault repair of the brake pedal sensor is completed, switching the failure control strategy into a normal control strategy.
Therefore, under the condition that the vehicle cost is not increased, the specific altitude of the area where the vehicle is located is accurately judged by detecting the air extraction rate and the vacuum degree of the vacuum pump, and then the vacuum pump control strategy corresponding to the altitude is executed, so that the vehicle can achieve the best braking performance in plateau areas with different altitudes, and the vehicle running safety is ensured. And this control strategy can be as a redundant control strategy, utilizes atmospheric pressure sensor to detect the vacuum when the vehicle, and then when controlling the vacuum pump, if atmospheric pressure sensor breaks down, can switch to the vacuum pump control strategy that this embodiment provided, ensures that the vacuum pump can not scrap because of long-time work, avoids influencing braking safety.
The control method and the control device of the vacuum pump provided by the invention have the following beneficial effects that:
the invention provides a control method and a device of a vacuum pump, wherein the method comprises the following steps: acquiring a first current pumping rate of a vacuum pump, and when the first current pumping rate is determined to be smaller than a preset first reference rate, continuously acquiring the pumping time of the vacuum pump; the first reference speed is the minimum pumping speed of the vacuum pump when the vehicle is in a plateau region; if the pumping time is determined to be longer than the preset reference time, acquiring the current vacuum degree of the vacuum pump; determining a current vacuum degree interval range to which the current vacuum degree belongs, determining the current altitude of an area where a vehicle is located based on the current vacuum degree interval range, and searching a corresponding current vacuum pump control strategy in a preset mapping table according to the current altitude; the corresponding relation between the altitude and the vacuum pump control strategy is stored in the preset table in advance; different altitude heights correspond to different vacuum pump control strategies; controlling the vacuum pump based on the current vacuum pump control strategy; therefore, under the condition that the vehicle cost is not increased (no extra atmospheric pressure sensor is needed), the specific altitude of the area where the vehicle is located is accurately judged by detecting the air extraction rate and the vacuum degree of the vacuum pump, and then the vacuum pump control strategy corresponding to the altitude is executed, so that the vehicle can achieve the optimal braking performance in the plateau areas with different altitudes, and the driving safety of the vehicle is ensured. And this control strategy can be as a redundant control strategy, utilizes atmospheric pressure sensor to detect the vacuum when the vehicle, and then when controlling the vacuum pump, if atmospheric pressure sensor breaks down, can switch to the vacuum pump control strategy that this embodiment provided, ensures that the vacuum pump can not scrap because of long-time work, avoids influencing braking safety.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.
Claims (10)
1. A method of controlling a vacuum pump, the method comprising:
acquiring a first current pumping rate of a vacuum pump, and when the first current pumping rate is determined to be smaller than a preset first reference rate, continuously acquiring the pumping time of the vacuum pump; the first reference speed is the minimum pumping speed of the vacuum pump when the vehicle is in a plateau region;
if the pumping time is determined to be longer than the preset reference time, acquiring the current vacuum degree of the vacuum pump;
determining a current vacuum degree interval range to which the current vacuum degree belongs, determining the current altitude of an area where a vehicle is located based on the current vacuum degree interval range, and searching a corresponding current vacuum pump control strategy in a preset mapping table according to the current altitude; the corresponding relation between the altitude and the vacuum pump control strategy is stored in the preset table in advance; different altitude heights correspond to different vacuum pump control strategies;
controlling the vacuum pump based on the current vacuum pump control strategy.
2. The method of claim 1, wherein determining a current vacuum degree interval range to which the current vacuum degree belongs, determining a current altitude of an area where a vehicle is located based on the current vacuum degree interval range, and searching a corresponding current vacuum pump control strategy in a preset mapping table according to the current altitude comprises:
judging whether the current vacuum degree interval range to which the current vacuum degree belongs is (P2-10, P2);
if the current vacuum degree interval range is determined to be (P2-10, P2), determining the current altitude of the area where the vehicle is located to be 1 km;
searching a corresponding current vacuum pump control strategy when the current altitude is 1km in a preset mapping table; wherein the current vacuum pump control strategy comprises:
when the vacuum degree of a vacuum pump of the vehicle is greater than or equal to P2-10, controlling the vacuum pump to stop working;
when the vacuum degree of the vacuum pump is less than or equal to P1, controlling the vacuum pump to be started; the P1 is the threshold value for turning on the vacuum pump when the vehicle is in the leveling zone, and the P2 is the threshold value for turning off the vacuum pump when the vehicle is in the leveling zone.
3. The method of claim 1, wherein determining a current vacuum degree interval range to which the current vacuum degree belongs, determining a current altitude of an area in which a vehicle is located based on the current vacuum degree interval range, and determining a corresponding current vacuum pump control strategy according to the current altitude comprises:
judging whether the current vacuum degree interval range to which the current vacuum degree belongs is (P2-17, P2-10 ];
if the current vacuum degree interval range is determined to be (P2-17, P2-10), determining the current altitude of the area where the vehicle is located to be 2 km;
searching a corresponding current vacuum pump control strategy when the current altitude is 2km in a preset mapping table; wherein the current vacuum pump control strategy comprises:
when the vacuum degree of a vacuum pump of the vehicle is greater than or equal to P2-17, controlling the vacuum pump to stop working;
when the vacuum degree of the vacuum pump is less than or equal to P1-7, controlling the vacuum pump to be started; the P1 is the threshold value for turning on the vacuum pump when the vehicle is in the leveling zone, and the P2 is the threshold value for turning off the vacuum pump when the vehicle is in the leveling zone.
4. The method of claim 1, wherein determining a current vacuum degree interval range to which the current vacuum degree belongs, determining a current altitude of an area in which a vehicle is located based on the current vacuum degree interval range, and determining a corresponding current vacuum pump control strategy according to the current altitude comprises:
judging whether the current vacuum degree interval range of the current vacuum degree is (P2-25, P2-17), if the current vacuum degree interval range is (P2-25, P2-17), determining that the current altitude of the area where the vehicle is located is 3 km;
searching a corresponding current vacuum pump control strategy when the current altitude is 3km in a preset mapping table; wherein the current vacuum pump control strategy comprises:
when the vacuum degree of a vacuum pump of the vehicle is greater than or equal to P2-25, controlling the vacuum pump to stop working;
when the vacuum degree of the vacuum pump is less than or equal to P1-15, controlling the vacuum pump to be started; the P1 is the threshold value for turning on the vacuum pump when the vehicle is in the leveling zone, and the P2 is the threshold value for turning off the vacuum pump when the vehicle is in the leveling zone.
5. The method of claim 1, wherein determining a current vacuum degree interval range to which the current vacuum degree belongs, determining a current altitude of an area in which a vehicle is located based on the current vacuum degree interval range, and determining a corresponding current vacuum pump control strategy according to the current altitude comprises:
judging whether the current vacuum degree interval range to which the current vacuum degree belongs is (P2-30, P2-25);
if the current vacuum degree interval range is determined to be (P2-30, P2-25), determining the current altitude of the area where the vehicle is located to be 4 km;
searching a corresponding current vacuum pump control strategy when the current altitude is 4km in a preset mapping table; wherein the current vacuum pump control strategy comprises:
when the vacuum degree of a vacuum pump of the vehicle is greater than or equal to P2-30, controlling the vacuum pump to stop working;
when the vacuum degree of the vacuum pump is less than or equal to P1-15, controlling the vacuum pump to be started; the P1 is the threshold value for turning on the vacuum pump when the vehicle is in the leveling zone, and the P2 is the threshold value for turning off the vacuum pump when the vehicle is in the leveling zone.
6. The method of claim 1, wherein prior to controlling the vacuum pump based on the current vacuum pump control strategy, further comprising:
acquiring a second current pumping speed of the vacuum pump;
judging whether the second current pumping rate is greater than a preset second reference rate, and if the second current pumping rate is determined to be greater than or equal to the second reference rate, updating the current vacuum pump control strategy to an initial vacuum pump control strategy; the initial vacuum pump strategy is a vacuum pump control strategy corresponding to the vehicle in the leveling zone, and the second reference speed is the maximum pumping speed of the vacuum pump when the vehicle is in the leveling zone.
7. The method of claim 6, wherein if it is determined that the second current pumping rate is less than the second reference rate, the method further comprises:
and judging whether the current second air extraction rate is greater than or equal to a first reference rate, and if the current second air extraction rate is determined to be less than the first reference rate, executing a vacuum pump control strategy corresponding to the vehicle in the area with the altitude height.
8. The method of claim 1, wherein the method further comprises:
and when the vacuum pump is controlled based on the current vacuum pump control strategy, if the vacuum degree sensor or the brake pedal sensor is determined to be in fault, the current vacuum pump control strategy is switched to a standby control strategy.
9. The method of claim 1, wherein the method further comprises:
and when the vacuum pump is controlled based on the current vacuum pump control strategy, if the vacuum pump is determined to have a fault, switching the current vacuum pump control strategy into a failure control strategy.
10. A control apparatus of a vacuum pump, characterized in that the apparatus comprises:
the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring a first current pumping rate of a vacuum pump, and when the first current pumping rate is determined to be smaller than a preset first reference rate, the acquisition unit continues to acquire pumping duration of the vacuum pump; the first reference speed is the minimum pumping speed of the vacuum pump when the vehicle is in a plateau region; if the pumping time is determined to be longer than the preset reference time, acquiring the current vacuum degree of the vacuum pump;
the determining unit is used for determining the range of the current vacuum degree interval to which the current vacuum degree belongs, determining the current altitude of the area where the vehicle is located based on the range of the current vacuum degree interval, and searching a corresponding current vacuum pump control strategy in a preset mapping table according to the current altitude; the corresponding relation between the altitude and the vacuum pump control strategy is stored in the preset table in advance; different altitude heights correspond to different vacuum pump control strategies;
a control unit for controlling the vacuum pump based on the current vacuum pump control strategy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011205645.0A CN112455409B (en) | 2020-11-02 | 2020-11-02 | Control method and device for vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011205645.0A CN112455409B (en) | 2020-11-02 | 2020-11-02 | Control method and device for vacuum pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112455409A true CN112455409A (en) | 2021-03-09 |
| CN112455409B CN112455409B (en) | 2022-03-08 |
Family
ID=74834324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011205645.0A Active CN112455409B (en) | 2020-11-02 | 2020-11-02 | Control method and device for vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112455409B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014135773A1 (en) * | 2013-03-05 | 2014-09-12 | Renault | Method and device for controlling a brake booster assistance vacuum |
| CN105539409A (en) * | 2015-11-30 | 2016-05-04 | 北京新能源汽车股份有限公司 | Brake booster system for vehicle and vehicle with brake booster system |
| CN105946842A (en) * | 2016-06-13 | 2016-09-21 | 上汽通用汽车有限公司 | Monitoring method and monitoring system used for monitoring air extraction performance of electronic vacuum pump |
| CN105966382A (en) * | 2016-05-03 | 2016-09-28 | 北京新能源汽车股份有限公司 | Electric vehicle, as well as method and device for estimating sea level elevation of environment around electric vehicle |
| CN109624951A (en) * | 2018-12-21 | 2019-04-16 | 爱驰汽车有限公司 | Vehicle and its brake control method, system, electronic equipment and storage medium |
| CN111591297A (en) * | 2020-05-29 | 2020-08-28 | 重庆长安新能源汽车科技有限公司 | Altitude estimation method and device for environment where pure electric vehicle is located and pure electric vehicle |
-
2020
- 2020-11-02 CN CN202011205645.0A patent/CN112455409B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014135773A1 (en) * | 2013-03-05 | 2014-09-12 | Renault | Method and device for controlling a brake booster assistance vacuum |
| CN105539409A (en) * | 2015-11-30 | 2016-05-04 | 北京新能源汽车股份有限公司 | Brake booster system for vehicle and vehicle with brake booster system |
| CN105966382A (en) * | 2016-05-03 | 2016-09-28 | 北京新能源汽车股份有限公司 | Electric vehicle, as well as method and device for estimating sea level elevation of environment around electric vehicle |
| CN105946842A (en) * | 2016-06-13 | 2016-09-21 | 上汽通用汽车有限公司 | Monitoring method and monitoring system used for monitoring air extraction performance of electronic vacuum pump |
| CN109624951A (en) * | 2018-12-21 | 2019-04-16 | 爱驰汽车有限公司 | Vehicle and its brake control method, system, electronic equipment and storage medium |
| CN111591297A (en) * | 2020-05-29 | 2020-08-28 | 重庆长安新能源汽车科技有限公司 | Altitude estimation method and device for environment where pure electric vehicle is located and pure electric vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112455409B (en) | 2022-03-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110979283B (en) | Control method of vacuum boosting system and storage medium | |
| CN110816508A (en) | Vehicle fault detection method and device, vehicle and storage medium | |
| CN101830214B (en) | Control module, control method, brake vacuum servo device and electric automobile | |
| CN111301381A (en) | Plateau control method for electric vacuum pump for new energy vehicle | |
| CN110329235A (en) | A kind of method, apparatus and system monitoring vehicle mounted electric air compressor | |
| CN104842988A (en) | Method and system for controlling switching-on threshold value and switching-off threshold value of brake vacuum pump | |
| CN111591297B (en) | Altitude estimation method and device for environment where pure electric vehicle is located and pure electric vehicle | |
| CN110723129B (en) | Fault detection and control method and device for vacuum braking of electric automobile | |
| CN114043979B (en) | Fault diagnosis and post-processing method and system for brake vacuum pump of electric automobile | |
| CN105235669A (en) | Braking assistance control system, control method thereof and vehicle | |
| CN110588619B (en) | Control method of electric automobile vacuum pump in plateau environment | |
| CN112356847A (en) | Vehicle fault processing method, device and system and storage medium | |
| CN107458362B (en) | Control device of vacuum power-assisted brake system and automobile | |
| CN112455409B (en) | Control method and device for vacuum pump | |
| CN101328843B (en) | Method for processing engine air inlet temperature sensor fault | |
| CN109580244A (en) | The tableland circumstance detection method and Vehicle in Plateau working condition detection system of vehicle | |
| CN104260718A (en) | Brake system for realizing self-protection function of electric vacuum pump and control method thereof | |
| CN205381264U (en) | Electric motor car vacuum servo control system | |
| CN110194137B (en) | Vacuum pump temperature control method and device, vehicle and storage medium | |
| KR20170105218A (en) | Method for detecting vacuum pump fail of vehicle | |
| CN106151004B (en) | A kind of water-aspirator pressure surge tank fault detection method and water pump | |
| CN211107379U (en) | New energy automobile braking electric vacuum boosting system | |
| CN113771824B (en) | Vacuum degree sensor fault diagnosis method based on brake lamp switch | |
| CN109113979B (en) | Compressor control method, control device and control system | |
| CN111376883A (en) | Vehicle and vacuum pump control method and device thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |