CN113954792A - Parking control system and parking control method for new energy vehicle - Google Patents
Parking control system and parking control method for new energy vehicle Download PDFInfo
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- CN113954792A CN113954792A CN202111239383.4A CN202111239383A CN113954792A CN 113954792 A CN113954792 A CN 113954792A CN 202111239383 A CN202111239383 A CN 202111239383A CN 113954792 A CN113954792 A CN 113954792A
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000007246 mechanism Effects 0.000 abstract description 19
- 230000008569 process Effects 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
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Classifications
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- 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
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
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- 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
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
- B60T1/062—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels acting on transmission parts
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- 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
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
- B60T1/065—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels employing disc
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
Abstract
The invention discloses a parking control system of a new energy vehicle, which comprises a parking controller, wherein the input end of the parking controller is respectively connected with an EPB (electronic parking brake) parking switch and a P-gear parking switch, the output end of the parking controller is connected with an electronic cable, and the electronic cable is connected with a brake caliper. The invention also discloses a control method of the parking control system of the new energy vehicle, and when an EPB parking request and/or a P-gear parking request exist, the parking braking force is controlled to be provided; when the accelerator opening is larger than the set accelerator opening and the gear is P gear, keeping the parking braking force unchanged; when the accelerator opening is larger than the set accelerator opening, the shift position is a non-P shift position, and an EPB parking request is present, the basic parking brake force makes the wheels respond to the driving torque. The invention combines the executing mechanisms of the P-gear parking and the EPB parking, and keeps the functions of the P-gear parking and the EPB parking unchanged.
Description
Technical Field
The invention relates to the technical field of parking control, in particular to a parking control system and a parking control method for a new energy vehicle.
Background
Most electric vehicles will be equipped with a P-range parking mechanism and an electronic hand brake parking mechanism (EPB). The P-gear parking mechanism utilizes a ratchet wheel to lock a transmission gear of a gearbox so as to prevent the transmission from rotating, thereby braking wheels. The EPB is an electric hand brake that replaces a conventional pull-rod type hand brake, and can drive an electric cable to transmit a tensile force to a wheel-side brake caliper to form a braking force.
Currently, P-gear parking and EPB parking have certain differences in practical use. When a driver requests to enter P range at a higher vehicle speed, the control system generally does not permit P range entry in order not to damage the lockup mechanism. Even if the speed is low, the P gear is entered, the brake is firstly stepped to reduce the speed to a set value, and then the P gear is allowed to be entered. And when the driver requests EPB parking, and the vehicle speed is higher or the brake is not stepped on, the parking control system can respond to the driver parking request and enter a braking state. In the P-range parking state, if the driver depresses the accelerator pedal, the drive system is not loadable with driving force, and the P-range parking state is maintained. While in the EPB parking state and no P-range parking exists, the drive system may load the driving force in response to the driver pedal request, and the EPB may automatically unload the braking force as the driving force is gradually increased and the vehicle speed is gradually increased, which is called a "light start" function.
The EPB system parking and the P-gear parking form braking in different modes, and the EPB system parking and the P-gear parking have certain repeatability in function but are different in use. With the improvement of the intelligent control process degree of the vehicle, the executing mechanisms of the EPB parking and the P-gear parking can be combined, and control is carried out by identifying control instructions of the EPB and the P-gear. How to design a parking control system to realize EPB parking and P-gear parking and embody the difference between the power response and the parking admission condition becomes a problem to be urgently waited.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a parking control system and a parking control method for a new energy vehicle, which can reduce a P-gear parking actuating mechanism and ensure that the EPB parking and P-gear parking functions are unchanged.
In order to achieve the purpose, the invention provides a parking control system of a new energy vehicle, which comprises a parking controller, wherein the input end of the parking controller is respectively connected with an EPB parking switch and a P-gear parking switch, the output end of the parking controller is connected with an electronic cable, and the electronic cable is connected with a brake caliper; the parking controller is used for judging whether the conditions of the EPB parking request and/or the P-gear parking request exist or not when the EPB parking switch or the P-gear parking switch is switched on, and controlling the electronic cable to provide parking braking force when the EPB parking request and/or the P-gear parking request exist.
Furthermore, the input end of the parking controller is also respectively connected with a vehicle speed sensor, a brake pedal opening degree sensor and an accelerator opening degree sensor.
Further, the parking controller is used for judging that a P-gear parking request exists when a P-gear parking switch is turned on, the vehicle speed is less than a set vehicle speed, and the opening degree of a brake pedal is greater than the set opening degree; and the P-gear parking releasing device is used for judging that a P-gear parking releasing request exists when the P-gear parking switch is closed and the opening of the brake pedal is larger than the set opening.
Further, the parking controller is configured to determine that the EPB parking request exists when the EPB parking switch is on, and to release the EPB parking request when the EPB parking switch is off.
Further, the parking controller is used for judging that when the gear is P gear and no request for releasing the parking of the P gear exists, maintaining the gear to be P gear; and the control device is used for judging that when the gear is in the non-P gear and no P-gear parking request exists, maintaining the gear to be in the non-P gear.
Further, the parking controller is used for judging that when an EPB parking request exists and/or the gear is maintained to be in the P gear, the electronic cable is controlled to provide parking braking force for the brake caliper.
Further, the parking controller is used for judging that when an EPB parking releasing request exists and an EPB parking braking releasing request exists or the gear is maintained to be in a non-P gear, the parking controller controls the electronic cable or the hydraulic braking mechanism not to provide the parking braking force for the brake caliper.
Further, the parking controller is used for judging that when the shift position is not the P shift position and an EPB parking request exists, and meanwhile, the parking controller also obtains the accelerator opening degree, and when the accelerator opening degree is larger than the set accelerator opening degree, the parking braking force is released to enable the wheels to respond to the driving torque.
Further, the parking controller is used for judging that when the gear is P gear, the accelerator opening degree is obtained at the same time, and when the accelerator opening degree is larger than the set accelerator opening degree, the parking braking force is kept unchanged and the driving torque is not responded.
Furthermore, the output end of the parking controller is respectively connected with a P-gear parking indicator lamp and an EPB parking indicator lamp.
Further, the parking controller is used for judging that a P-gear parking indicator lamp is turned on when a P-gear parking request exists; when there is an EPB parking request, an EPB parking indicator lamp is turned on.
The invention also provides a control method utilizing the parking control system of the new energy vehicle, which comprises the following steps:
acquiring the vehicle speed, the opening degree of a brake pedal, and the on-off states of an EPB parking switch and a P-gear parking switch;
when the P-gear parking switch is turned on, the vehicle speed is less than the set vehicle speed, and the opening of the brake pedal is greater than the set opening, a P-gear parking request exists; when the EPB parking switch is on, an EPB parking request exists;
when an EPB parking request and/or a P-gear parking request exist, controlling an electronic cable to provide parking braking force for a brake caliper;
acquiring an accelerator opening and a gear, and when the accelerator opening is larger than a set accelerator opening and the gear is a P gear, keeping the parking braking force unchanged and not responding to the driving torque; and when the accelerator opening is larger than the set accelerator opening, the gear is not P gear, and an EPB parking request exists, releasing the parking braking force to enable the wheels to respond to the driving torque.
Further, when a P-gear parking request exists, a P-gear parking indicator lamp is turned on; when there is an EPB parking request, an EPB parking indicator lamp is turned on.
The invention has the beneficial effects that: and the P-gear parking executing mechanism is reduced, and the P-gear parking and EPB parking functions are kept unchanged. The P-gear parking and EPB parking executing mechanisms are set as brake calipers, whether the requests of P-gear parking and EPB parking exist is judged according to the vehicle speed, the opening degree of a brake pedal, the opening and closing states of an EPB parking switch and a P-gear parking switch, and when the EPB parking request and/or the P-gear parking request exist, parking braking is executed; and only when the P-gear parking request does not exist and the EPB parking request exists, the parking braking force is released when the accelerator opening is larger than the set accelerator opening so that the wheels respond to the driving torque, so that the P-gear parking condition can be ensured to be unchanged, and the function of responding to the driving torque during the EPB parking is unchanged.
Drawings
Fig. 1 is a schematic structural diagram of a parking control system of the present invention.
Fig. 2 is a flowchart of a parking control method of the present invention.
The components in the figures are numbered as follows: the system comprises an EPB parking switch 1, a P gear parking switch 2, a vehicle speed sensor 3, a brake pedal opening sensor 4, a parking controller 5, an electronic cable 6, a hydraulic brake mechanism 7, brake calipers 8, a P gear parking indicator lamp 9, an EPB parking indicator lamp 10 and an accelerator opening sensor 11.
Detailed Description
The following detailed description is provided to further explain the claimed embodiments of the present invention in order to make it clear for those skilled in the art to understand the claims. The scope of the invention is not limited to the following specific examples. It is intended that the scope of the invention be determined by those skilled in the art from the following detailed description, which includes claims that are directed to this invention.
As shown in fig. 1, a new energy vehicle parking control system, including parking controller 5, the input of parking controller 5 is connected with EPB parking switch 1, P fender parking switch 2, speed sensor 3, brake pedal opening sensor 4 and throttle opening sensor 11 respectively, and the output of parking controller 5 is connected with electron cable 6, hydraulic braking mechanism 7, P fender parking pilot lamp 9 and EPB parking pilot lamp 10 respectively, and electron cable 6 and hydraulic braking mechanism 7 all are connected with brake caliper 8. The electronic cable drives the brake calipers to perform parking brake through pulling force, the hydraulic brake mechanism drives the brake calipers to perform brake through hydraulic pressure, and the P-gear parking indicator lamp 9 and the EPB parking indicator lamp 10 are both arranged on an instrument panel.
The parking controller 5 is used for judging that a P gear parking request exists when the P gear parking switch is switched on, the vehicle speed is less than 3km/h and the opening degree of a brake pedal is greater than 3%; and the P-gear parking releasing control system is used for judging that the P-gear parking releasing request exists when the P-gear parking switch is closed and the opening of the brake pedal is larger than 3%. The parking controller 5 is used for judging that when the gear is P gear and no request for releasing the parking of the P gear exists, maintaining the gear to be P gear; and the control device is used for judging that when the gear is in the non-P gear and no P-gear parking request exists, maintaining the gear to be in the non-P gear.
The technical scheme is that in an original P-gear parking system, only when a brake pedal is stepped and the vehicle speed is close to a parking state, the P gear is allowed to be engaged, and the gearbox cannot respond to the driving torque when an accelerator pedal is stepped after the P gear is engaged, otherwise, the gearbox is easily damaged when the P gear is engaged in the normal driving process, and the safety accident is easily caused by mistakenly stepping on the accelerator when the P gear is parked. The invention reserves the condition of P-gear parking admission, and is beneficial to the safety of automobile driving.
The parking controller 5 is configured to determine that there is an EPB parking request when the EPB parking switch is on, and that there is a release of the EPB parking request when the EPB parking switch is off. The EPB parking condition and the parking releasing condition are kept unchanged, namely the EPB parking can be directly carried out in the running process, and when the EPB parking and the vehicle stops, corresponding power requirements can be still met when the accelerator is stepped.
The parking controller 5 is used for judging whether an EPB parking request and/or a P-gear parking request exists or not, and controlling the electronic cable 6 or the hydraulic brake mechanism 7 to provide parking braking force for the brake caliper 8.
The parking controller 5 is used for judging whether an EPB parking request exists or not and/or when the gear is maintained to be in the P gear, and controlling the electronic cable 6 or the hydraulic brake mechanism 7 to provide parking braking force for the brake caliper 8.
The parking controller 5 is used for judging whether the EPB parking releasing request exists or not, and controlling the electronic cable 6 or the hydraulic brake mechanism 7 not to provide the parking braking force for the brake caliper 8 when the EPB parking releasing request exists or the EPB parking braking releasing request exists or the gear is maintained to be in the non-P gear.
That is, the brake caliper needs to perform braking whenever one of EPB parking or P-range parking is available. The brake caliper does not perform braking only when neither EPB parking nor P-range parking is available. This provides a double insurance of the parking brake, ensuring the safety of the vehicle running.
And the parking controller is used for judging that when the shift is not P and an EPB parking request exists, the parking controller also acquires the accelerator opening, and when the accelerator opening is more than 20%, the parking braking force is released to enable the wheels to respond to the driving torque. This is to maintain the function that the vehicle starting phase can respond to the driving torque in the original EPB parking state.
The parking controller 5 is used for judging whether a P-gear parking request exists or not and acquiring the accelerator opening, and when the accelerator opening is larger than 0, keeping the parking braking force unchanged and not responding to the driving torque. This is to maintain the function that the vehicle cannot respond to the driving torque in the original P-range parking state.
The parking controller 5 is used for judging whether a P gear parking request exists or a gear is maintained to be a P gear, and starting a P gear parking indicator lamp 9; when there is an EPB parking request, the EPB parking indicator lamp 10 is turned on. This is to prompt the driver to turn the EPB parking and the P range parking at this time.
As shown in fig. 2, the control method of the parking control system for the new energy vehicle is as follows:
1. acquiring the vehicle speed, the opening degree of a brake pedal and the opening and closing states of an EPB parking switch 1 and a P-gear parking switch 2;
2. judging that a P-gear parking request exists when a P-gear parking switch is turned on, the vehicle speed is less than 3km/h and the opening of a brake pedal is greater than 3%; judging that a P-gear parking releasing request exists when the P-gear parking switch is closed and the opening of a brake pedal is larger than 3%; when the EPB parking switch is on, an EPB parking request exists; when the EPB park switch is off, there is a release EPB park request;
3. when an EPB parking request and/or a P-gear parking request exist or the EPB parking request and/or the P-gear is maintained, controlling an electronic cable 6 or a hydraulic brake mechanism 7 to provide parking braking force for a brake caliper 8;
when a P-gear parking request exists or the gear is maintained to be the P gear, a P-gear parking indicator lamp 9 is turned on; when there is an EPB parking request, the EPB parking indicator lamp 10 is turned on.
4. Acquiring the opening degree of an accelerator, and when the opening degree of the accelerator is larger than 0, if a P-gear parking request is available to maintain the gear as the P gear, keeping the parking braking force unchanged and not responding to the driving torque, wherein the function of easily starting without activation in the figure 2 is shown; when the accelerator opening is larger than 20%, if an EPB parking request exists and a P-range parking request does not exist or a non-P range is maintained, the parking braking force is released to make the wheels respond to the driving torque, which is the activation of the easy start function in fig. 2.
The P-gear parking and EPB parking executing mechanisms are set as brake calipers, whether the requests of P-gear parking and EPB parking exist is judged according to the vehicle speed, the opening degree of a brake pedal, the opening and closing states of an EPB parking switch and a P-gear parking switch, and when the EPB parking request and/or the P-gear parking request exist, parking braking is executed; and only when the P-gear parking request does not exist and the EPB parking request exists, the parking braking force is released when the accelerator opening is larger than the set accelerator opening so that the wheels respond to the driving torque, so that the P-gear parking condition can be ensured to be unchanged, and the function of responding to the driving torque during the EPB parking is unchanged.
Claims (10)
1. The utility model provides a new forms of energy car parking control system which characterized in that: the parking system comprises a parking controller (5), wherein the input end of the parking controller (5) is respectively connected with an EPB (electric vehicle brake) parking switch (1) and a P-gear parking switch (2), the output end of the parking controller (5) is connected with an electronic cable (6), and the electronic cable (6) is connected with a brake caliper (8); the parking controller (5) is used for judging whether conditions of an EPB parking request and/or a P-gear parking request exist or not when the EPB parking switch (1) or the P-gear parking switch (2) is switched on, and controlling the electronic cable (6) to provide parking braking force when the EPB parking request and/or the P-gear parking request exist.
2. The new energy vehicle parking control system of claim 1, characterized in that: the input end of the parking controller (5) is also respectively connected with a vehicle speed sensor (3), a brake pedal opening sensor (4) and an accelerator opening sensor (11).
3. The new energy vehicle parking control system of claim 2, characterized in that: the parking controller (5) is used for judging that a P-gear parking request exists when the P-gear parking switch (2) is turned on, the vehicle speed is less than a set vehicle speed, and the opening degree of a brake pedal is greater than the set opening degree; and the device is used for judging that the P-gear parking request is released when the P-gear parking switch (2) is closed and the opening of the brake pedal is larger than the set opening.
4. The new energy vehicle parking control system of claim 3, characterized in that: the parking controller (5) is used for judging that an EPB parking request exists when the EPB parking switch (1) is turned on, and releasing the EPB parking request exists when the EPB parking switch (1) is turned off.
5. The new energy vehicle parking control system of claim 4, characterized in that: and the parking controller (5) is used for judging that when the gear is not P gear and an EPB parking request exists, simultaneously acquiring the opening degree of an accelerator, and when the opening degree of the accelerator is larger than the set opening degree of the accelerator, releasing parking braking force to enable the wheels to respond to the driving torque.
6. The new energy vehicle parking control system of claim 4, characterized in that: and the parking controller (5) is used for judging that when the gear is P gear, the accelerator opening degree is also acquired, and when the accelerator opening degree is larger than the set accelerator opening degree, the parking braking force is kept unchanged and the driving torque is not responded.
7. The new energy vehicle parking control system of claim 1, characterized in that: the output end of the parking controller (5) is also respectively connected with a P-gear parking indicator lamp (9) and an EPB parking indicator lamp (10).
8. The new energy vehicle parking control system of claim 7, characterized in that: the parking controller (5) is used for judging that a P-gear parking indicator lamp (9) is turned on when a P-gear parking request exists; when there is an EPB parking request, an EPB parking indicator lamp (10) is turned on.
9. A control method using the new energy vehicle parking control system of claims 1-8, characterized in that:
acquiring the vehicle speed, the opening degree of a brake pedal, and the opening and closing states of an EPB parking switch (1) and a P-gear parking switch (2);
when the P-gear parking switch (2) is turned on, the vehicle speed is less than the set vehicle speed, and the opening of the brake pedal is greater than the set opening, judging that a P-gear parking request exists; when the EPB parking switch (1) is on, judging that an EPB parking request exists;
when an EPB parking request and/or a P-gear parking request exist, controlling an electronic cable (6) to provide parking braking force for a brake caliper (8);
acquiring an accelerator opening and a gear, and when the accelerator opening is larger than a set accelerator opening and the gear is a P gear, keeping the parking braking force unchanged and not responding to the driving torque; and when the accelerator opening is larger than the set accelerator opening, the gear is not P gear, and an EPB parking request exists, releasing the parking braking force to enable the wheels to respond to the driving torque.
10. The control method of the parking control system of the new energy vehicle according to claim 9, characterized in that: when a P-gear parking request exists, a P-gear parking indicator lamp (9) is turned on; when there is an EPB parking request, an EPB parking indicator lamp (10) is turned on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111239383.4A CN113954792A (en) | 2021-10-25 | 2021-10-25 | Parking control system and parking control method for new energy vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111239383.4A CN113954792A (en) | 2021-10-25 | 2021-10-25 | Parking control system and parking control method for new energy vehicle |
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| CN113954792A true CN113954792A (en) | 2022-01-21 |
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| CN202111239383.4A Pending CN113954792A (en) | 2021-10-25 | 2021-10-25 | Parking control system and parking control method for new energy vehicle |
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| CN (1) | CN113954792A (en) |
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Application publication date: 20220121 |
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| RJ01 | Rejection of invention patent application after publication |