CN112141071A - Hybrid vehicle starting control method and device - Google Patents
Hybrid vehicle starting control method and device Download PDFInfo
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- CN112141071A CN112141071A CN201910498292.9A CN201910498292A CN112141071A CN 112141071 A CN112141071 A CN 112141071A CN 201910498292 A CN201910498292 A CN 201910498292A CN 112141071 A CN112141071 A CN 112141071A
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- air pressure
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- temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Hybrid Electric Vehicles (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Abstract
The invention discloses a hybrid vehicle starting control method and a hybrid vehicle starting control device, wherein a brake air pressure value and a coolant temperature which are obtained by detection are compared with a preset air pressure threshold value and a preset temperature threshold value, when the brake air pressure value is lower than the preset air pressure threshold value, no matter whether the engine coolant temperature is higher than the preset threshold value or not, the vehicle is forbidden to start, the vehicle starting safety is improved, but an engine does not shut down, an air pump supplies air to a brake air storage cylinder, and the engine coolant is heated through self heating; when the brake air pressure value is higher than a preset air pressure threshold value and the temperature of the engine coolant is higher than a preset temperature threshold value, the engine is controlled to be flamed out, starting is controlled through the motor, the engine can be started and protected, and the purpose of saving oil can be achieved; when the brake air pressure value is higher than the preset air pressure threshold value and the temperature of the engine coolant is lower than the preset temperature threshold value, starting is controlled through the engine, and the vehicle can be controlled to run under special conditions.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a hybrid vehicle starting control method and device.
Background
With the increasing requirements on environmental protection, the hybrid vehicle has made great progress, and people have higher and higher requirements on the safety of the hybrid vehicle.
The existing hybrid power vehicle usually adopts air brake, if the brake air pressure is insufficient when the vehicle is started, the motor is directly adopted for starting, and if the vehicle needs to be braked after starting, potential safety hazards exist; when the temperature is low, if the motor is directly adopted for starting, the motor reversely drags the engine for starting after starting, the engine directly drives the vehicle after the engine is started, and the engine is easily damaged because the engine is not preheated.
Therefore, how to ensure the safety of vehicle starting is a technical problem that needs to be solved by those skilled in the art at present.
Disclosure of Invention
In view of the above, the present invention provides a method and a device for controlling starting of a hybrid vehicle, which can effectively ensure safety of starting.
In order to achieve the purpose, the invention provides the following technical scheme:
a hybrid vehicle launch control method comprising:
starting a high-voltage and low-voltage electrical system;
detecting whether a vehicle high-low voltage electrical system has a fault;
if so, the subsequent operation is invalid; if not, starting the engine;
detecting whether the engine has a fault;
if so, the subsequent operation is invalid; if not, detecting whether the brake air pressure value is larger than a preset air pressure threshold value or not, and detecting whether the temperature of the engine coolant is larger than a preset temperature threshold value or not;
if the brake air pressure value is lower than a preset air pressure threshold value, starting is forbidden; if the brake air pressure value is higher than the preset air pressure threshold value, and the temperature of the engine coolant is higher than the preset temperature threshold value, the engine is flamed out, and the motor controls starting.
Preferably, if the brake air pressure value is higher than a preset air pressure threshold value, and the temperature of the engine coolant is lower than a preset temperature threshold value, the engine is controlled to start.
Preferably, when the engine is started when the temperature of the engine coolant is lower than a preset temperature threshold value, a warning signal that the water temperature is too low is sent.
Preferably, when starting is prohibited because the brake air pressure value is lower than a preset air pressure threshold value, the engine controls the inflating pump to inflate the brake air cylinder.
A hybrid vehicle start control device comprising:
the starting device is used for starting the high-low voltage electrical system, the electrical detection device is used for detecting whether the high-low voltage electrical system has faults or not, if yes, subsequent operation is invalid, and if not, the engine is started through the starting device;
the air pressure sensor is used for detecting a brake air pressure value, and the water temperature sensor is used for detecting the temperature of engine coolant;
the vehicle control unit is used for forbidding the vehicle to start when the braking air pressure value is lower than a preset air pressure threshold value; and when the brake air pressure value is higher than a preset air pressure threshold value and the temperature of the engine coolant is higher than a preset temperature threshold value, controlling the engine to be flamed out and controlling starting through the motor.
Preferably, the vehicle control unit is further configured to control starting through the engine when the brake air pressure value is higher than a preset air pressure threshold value and the temperature of the engine coolant is lower than a preset temperature threshold value.
Preferably, the engine further comprises warning means for sending a warning signal that the water temperature is too low when the engine is started when the temperature of the engine coolant is lower than a preset temperature threshold.
Preferably, the warning device is a display device for displaying the warning signal.
Preferably, the air pump is used for supplying air to the brake air reservoir when starting is forbidden due to the fact that the brake air pressure value is lower than a preset air pressure threshold value.
Preferably, the motor is a permanent magnet synchronous motor.
Compared with the prior art, the technical scheme has the following advantages:
the invention provides a hybrid vehicle starting control method, which comprises the following steps: starting a high-voltage and low-voltage electrical system; detecting whether a vehicle high-low voltage electrical system has a fault; if so, the subsequent operation is invalid; if not, starting the engine, and detecting whether the engine has a fault; if so, the subsequent operation is invalid; if not, detecting whether the brake air pressure value meets a preset air pressure threshold value or not, and detecting whether the temperature of the engine coolant meets a preset temperature threshold value or not; if the brake air pressure value is lower than the preset air pressure threshold value, starting is forbidden, the situation that the vehicle is started due to insufficient brake air pressure value can be avoided, and starting safety is improved; if the brake air pressure value is higher than the preset air pressure threshold value, and the temperature of the engine coolant is higher than the preset temperature threshold value, the engine is flamed out, the starting is controlled by the motor, the damage to the engine can be reduced, and the purpose of saving oil can be realized.
The invention provides a hybrid vehicle start control device, comprising: the starting device is used for starting the high-low voltage electrical system, the electrical detection device is used for detecting whether the high-low voltage electrical system has faults or not, if yes, subsequent operation is invalid, and if not, the engine is started through the starting device; the air pressure sensor is used for detecting a brake air pressure value, and the water temperature sensor is used for detecting the temperature of engine coolant; the vehicle control unit is used for forbidding the vehicle to start when the braking air pressure value is lower than a preset air pressure threshold value, so that the condition that the vehicle is started due to insufficient braking air pressure value can be avoided, and the starting safety is improved; when the brake air pressure value is higher than the preset air pressure threshold value and the temperature of the engine coolant is higher than the preset temperature threshold value, the engine is controlled to be flamed out, starting is controlled through the motor, damage to the engine can be reduced, and the purpose of saving oil can be achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic flow chart of a hybrid vehicle starting control method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a hybrid vehicle starting control device according to an embodiment of the present invention.
The reference numbers are as follows:
the system comprises a water temperature sensor 1, an air pressure sensor 2, an engine ECU3, a meter 4, a vehicle control unit 5, a motor controller 6 and a motor 7.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic flow chart illustrating a hybrid vehicle starting control method according to an embodiment of the present invention.
The embodiment of the invention provides a hybrid vehicle starting control method, which comprises the following steps:
s100: the invention discloses a starting high-low voltage electric system, which is a coaxial parallel type hybrid vehicle based ON a P2 structure, wherein the vehicle adopts air brake, high-pressure air required by braking is provided by an air pump arranged ON an engine, and when the hybrid vehicle is operated to start and an ignition key is turned to an ON gear, the vehicle is electrified at high voltage and low voltage.
S200: whether the high-voltage and low-voltage electric system of the vehicle has a fault is detected. The vehicle power system completes power-on self-test, whether the vehicle high-low voltage electrical system has enough faults is checked, if the vehicle high-low voltage electrical system has the faults, follow-up operation is invalid, and if the vehicle high-low voltage electrical system has no faults, the next step is carried out:
s300: screwing an ignition key to a Start gear, starting an engine, checking whether the engine has a fault through a vehicle controller, if the engine has the fault, performing subsequent operation inefficacy, and if the engine has no fault, entering the next step:
s401: detecting whether the brake air pressure value is larger than a preset air pressure threshold value or not; s402: it is detected whether the engine coolant temperature meets a temperature greater than a threshold. The preset air pressure threshold value is preferably 0.6Mpa, the preset temperature threshold value is preferably 60 ℃, the braking air pressure value can be measured through an air pressure sensor, and the temperature can be measured through a temperature sensor.
If the brake air pressure value is lower than the preset air pressure value, the next step is carried out:
s500: no matter whether the temperature of the engine coolant is larger than a preset threshold value or not, the vehicle controller controls the vehicle to prohibit starting, starting of the vehicle under the condition that the braking air pressure is insufficient can be avoided, potential safety hazards are reduced, starting safety is improved, however, the engine does not shut down, and the engine controls the inflating pump to supply air to the braking air storage cylinder.
If the brake air pressure value is higher than the preset air pressure threshold value, and the temperature of the engine coolant is higher than the preset temperature threshold value, the next step is carried out:
s501: the engine is controlled to be shut down, and the motor is used for controlling starting. The starting mode is the best recommended starting mode, the most fuel-saving mode is realized, and in addition, the condition that the engine is damaged due to the fact that the engine is not preheated can be avoided.
In addition, if the brake air pressure value is higher than the preset air pressure threshold value, and the temperature of the engine coolant is lower than the preset temperature threshold value, the next step is carried out:
s502: the engine is used for controlling starting, the driving force of the vehicle is provided by the engine at the moment, the engine continues to preheat the engine body, and the engine is in a good working state when the power source of the engine and the driving motor of the vehicle is switched.
When the engine is started when the temperature of the engine coolant is lower than a preset temperature threshold value, a warning signal that the water temperature is too low is sent out. The starting mode can ensure that the vehicle can be controlled to run under special conditions.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a hybrid vehicle start control device according to an embodiment of the present invention. The embodiment of the invention also provides a starting control device of a hybrid vehicle, the control device is based on a P2 structure coaxial parallel hybrid vehicle, the vehicle adopts air brake, high-pressure air required by braking is provided by an inflating pump carried by the engine, and the control device comprises: the automatic water temperature monitoring system comprises a starting device, a high-low voltage electrical system, an electrical detection device, an air pressure sensor 2, a water temperature sensor 1 and a vehicle control unit 5, wherein the starting device is used for starting the high-low voltage electrical system, the electrical detection device is used for detecting whether the high-low voltage electrical system has faults or not, the electrical detection device is a device of the high-low voltage electrical system, and self-detection can be carried out through the electrical detection device when the high-low voltage electrical system is started. If the high-low voltage electric system has a fault, the subsequent operation is invalid, and if the high-low voltage electric system has no fault, the engine is started through the starting device.
Specifically, when a driver operates the hybrid vehicle to Start, when an ignition key is screwed to an ON gear, the vehicle is electrified at high and low voltages, a vehicle power system completes electrification self-check, whether a high and low voltage electrical system of the vehicle has a fault or not is checked, if the high and low voltage electrical system has the fault, subsequent operation is invalid, no fault exists, the ignition key is screwed to a Start gear, an engine is started, the engine performs self-check, whether the vehicle has a fault or serious fault is judged, and meanwhile, detection information is reported to the vehicle controller 5 through a CAN bus.
After the vehicle control unit 5 judges that the engine has no serious fault, the air pressure sensor 2 detects the brake air pressure value, the water temperature sensor 1 detects the temperature of the engine coolant, the instrument 4 starts the brake air pressure value detected by the air pressure sensor 2 to the vehicle control unit 5 through the CAN bus, and the temperature of the engine coolant is sent to the vehicle control unit 5 through the CAN bus by the engine ECU 3.
The vehicle control unit 5 compares the received information of the brake air pressure value and the coolant temperature with a preset air pressure threshold and a preset temperature threshold, wherein the preset air pressure threshold is preferably 0.6Mpa, the preset temperature threshold is preferably 60 ℃, and different comparison results generate different control signals.
When the brake air pressure value is lower than a preset air pressure threshold value, no matter whether the temperature of the engine coolant is larger than the preset threshold value or not, starting of the vehicle is forbidden, but the engine does not shut down, air is supplied to the brake air storage cylinder through the inflating pump, and the engine coolant is heated through self heating;
when the brake air pressure value is higher than a preset air pressure threshold value, and the temperature of the engine coolant is higher than a preset temperature threshold value, controlling the engine to stop, sending a signal to the motor controller 6 to control the motor 7 to start, and controlling starting through the motor 7, wherein the starting mode is the best recommended starting mode and saves most oil, and the motor 7 preferably selects the permanent magnet synchronous motor 7;
when the brake air pressure value is higher than the preset air pressure threshold value and the temperature of the engine coolant is lower than the preset temperature threshold value, starting is controlled through the engine, and the vehicle can be controlled to run under special conditions.
Further, the water temperature control device further comprises a warning device, and the warning device is used for sending a warning signal that the water temperature is too low when the engine is started when the temperature of the engine coolant is lower than a preset temperature threshold. The warning device is preferably a display device for displaying a warning signal, such as a meter 4 on the vehicle, and the driver can be visually notified of the low temperature of the engine coolant by the meter 4.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The hybrid vehicle start control method and the hybrid vehicle start control device provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. A hybrid vehicle launch control method, characterized by comprising:
starting a high-voltage and low-voltage electrical system;
detecting whether a vehicle high-low voltage electrical system has a fault;
if so, the subsequent operation is invalid; if not, starting the engine, and detecting whether the engine has a fault;
if so, the subsequent operation is invalid; if not, detecting whether the brake air pressure value is larger than a preset air pressure threshold value or not, and detecting whether the temperature of the engine coolant is larger than a preset temperature threshold value or not;
if the brake air pressure value is lower than a preset air pressure threshold value, starting is forbidden; if the brake air pressure value is higher than the preset air pressure threshold value, and the temperature of the engine coolant is higher than the preset temperature threshold value, the engine is flamed out, and the motor controls starting.
2. The hybrid vehicle launch control method of claim 1, wherein launch is controlled by the engine if the brake air pressure value is above a preset air pressure threshold and the engine coolant temperature is below a preset temperature threshold.
3. The hybrid vehicle launch control method of claim 2, characterized in that a warning signal of too low water temperature is issued when the engine is started when the engine coolant temperature is below a preset temperature threshold.
4. The hybrid vehicle startup control method according to any one of claims 1 to 3, characterized in that the engine control inflator replenishes the brake air reservoir when startup is prohibited because the brake air pressure value is lower than a preset air pressure threshold value.
5. A hybrid vehicle start control device characterized by comprising:
the starting device is used for starting the high-low voltage electrical system, the electrical detection device is used for detecting whether the high-low voltage electrical system has faults or not, if yes, subsequent operation is invalid, and if not, the engine is started through the starting device;
the air pressure sensor is used for detecting a brake air pressure value, and the water temperature sensor is used for detecting the temperature of engine coolant;
the vehicle control unit is used for forbidding the vehicle to start when the braking air pressure value is lower than a preset air pressure threshold value; and when the brake air pressure value is higher than a preset air pressure threshold value and the temperature of the engine coolant is higher than a preset temperature threshold value, controlling the engine to be flamed out and controlling starting through the motor.
6. The hybrid vehicle start control device according to claim 5, wherein the vehicle control unit is further configured to control start by the engine when the brake air pressure value is higher than a preset air pressure threshold value and the engine coolant temperature is lower than a preset temperature threshold value.
7. The hybrid vehicle start control device according to claim 6, characterized by further comprising warning means for issuing a warning signal that the water temperature is too low when the engine is started when the engine coolant temperature is below a preset temperature threshold.
8. The hybrid vehicle start control device according to claim 7, characterized in that the warning device is a display device for displaying the warning signal.
9. The hybrid vehicle start control apparatus according to any one of claims 5 to 8, further comprising an air pump for charging the brake reservoir when start is prohibited because the brake air pressure value is lower than a preset air pressure threshold value, and a brake reservoir.
10. The hybrid vehicle start-up control device according to claim 9, wherein the electric motor is a permanent magnet synchronous motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910498292.9A CN112141071A (en) | 2019-06-10 | 2019-06-10 | Hybrid vehicle starting control method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910498292.9A CN112141071A (en) | 2019-06-10 | 2019-06-10 | Hybrid vehicle starting control method and device |
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| CN112141071A true CN112141071A (en) | 2020-12-29 |
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| CN201910498292.9A Pending CN112141071A (en) | 2019-06-10 | 2019-06-10 | Hybrid vehicle starting control method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116461529A (en) * | 2023-06-19 | 2023-07-21 | 盛瑞传动股份有限公司 | Vermicular starting control method, device, equipment and computer readable storage medium |
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