Hybrid bus engine start-stop control method and hybrid bus

Abstract

The application discloses a hybrid passenger car engine start-stop control method and a hybrid passenger car. The engine start-stop control method comprises the following steps: judging the working condition of the hybrid passenger car during the driving process of the hybrid passenger car; when it is judged that the hybrid passenger car is in straight-line driving working condition, the engine start-stop is controlled according to a standard engine start-stop strategy; when it is judged that the hybrid passenger car is in turning driving working condition, the engine start-stop is controlled according to a turning working condition engine start-stop strategy; and when it is judged that the hybrid passenger car is in congestion driving working condition, the engine start-stop is controlled according to a congestion working condition engine start-stop strategy. The hybrid passenger car has a vehicle control module, and the vehicle control module is provided with a program for realizing the above engine start-stop control method. The engine start-stop control method and the hybrid passenger car can reduce the engine start-stop frequency in the turning driving working condition and the congestion driving working condition.

Description

TECHNICAL FIELD

[0001] The present application relates to an engine control technology of a hybrid bus, in particular to an engine start-stop control method of a hybrid bus and a hybrid bus. BACKGROUND

[0002] With the increasingly serious international energy shortage and the increasing attention of the country to environmental protection, hybrid buses gradually become the main force of urban public transport.

[0003] The current hybrid bus is usually configured with an engine, a drive motor and an ISG motor, wherein the drive motor is used to drive the vehicle to run (drive the wheels to rotate), the ISG motor is used to generate electricity to charge the power battery and provide driving power for the drive motor, and the engine is used to output torque to assist the drive motor to drive the vehicle to run and drive the ISG motor to generate electricity.

[0004] For a hybrid bus, it is very important to develop a suitable engine control method. The current common engine control method is that the vehicle control module comprehensively judges and manages the engine start-stop and energy output according to the signals such as vehicle demand torque, vehicle speed, engine water temperature, power battery SOC value, but there is no special consideration for turning driving conditions and congestion driving conditions. Due to the complex and variable urban bus route conditions, especially the turning and congestion conditions are more common, which causes the frequent change of torque demand and further leads to the frequent start-stop of the engine, that is, the turning driving condition and the congestion driving condition will greatly increase the engine start-stop frequency, which will cause two adverse effects, on the one hand, the frequent start-stop of the engine will shorten the service life of the engine, on the other hand, the frequent start-stop of the engine will affect the passenger comfort. SUMMARY

[0005] The purpose of the present application is to provide an engine start-stop control method of a hybrid bus and a hybrid bus, which can reduce the engine start-stop frequency under turning driving conditions and congestion driving conditions.

[0006] In order to achieve the above technical purpose, the present application adopts the following technical scheme:

[0007] An engine start-stop control method of a hybrid bus, the engine start-stop control method comprising:

[0008] judging the working condition of the hybrid bus during the driving process of the hybrid bus;

[0009] when it is determined that the hybrid bus is in a straight line driving condition, the engine start-stop is controlled according to a pre-set standard engine start-stop strategy;

[0010] When the hybrid bus is determined to be in the turning driving condition, the engine start-stop is controlled according to the preset turning condition engine start-stop strategy.

[0011] When the hybrid bus is determined to be in the congestion driving condition, the engine start-stop is controlled according to the preset congestion condition engine start-stop strategy.

[0012] Further, the turning condition engine start-stop strategy comprises:

[0013] maintaining the engine start-stop state before the hybrid bus enters the turning driving condition;

[0014] After the hybrid bus leaves the turning driving condition and enters the straight driving condition, the engine start-stop is restored to be controlled according to the standard engine start-stop strategy.

[0015] Further, the congestion condition engine start-stop strategy comprises:

[0016] controlling the engine to stop;

[0017] After the hybrid bus leaves the congestion driving condition and enters the straight driving condition, the engine start-stop is restored to be controlled according to the standard engine start-stop strategy.

[0018] Further, the congestion condition engine start-stop strategy further comprises:

[0019] After the hybrid bus leaves the congestion driving condition and enters the straight driving condition, and before the engine start-stop is restored to be controlled according to the standard engine start-stop strategy, a delay of 5 seconds is performed.

[0020] Further, the determination that the hybrid bus is in the turning driving condition comprises:

[0021] when: the electronic power steering system message of the hybrid bus is confirmed to be received,

[0022] and, the EHPS speed is greater than or equal to N EHPS ,

[0023] and, the intelligent map module message of the hybrid bus is confirmed to be received,

[0024] and, the intelligent map module of the hybrid bus sends a signal of an upcoming turn or an upcoming station,

[0025] and, the turn signal is on or the steering wheel angle exceeds a preset steering invalid angle threshold range,

[0026] then: the hybrid bus is determined to be in the turning driving condition.

[0027] When: The intelligent map module of the hybrid bus sends a signal to leave the turn or exit the station.

[0028] Furthermore, when the turn signal is off or the steering wheel is straightened,

[0029] Then: Determine that the hybrid bus has exited the turning driving condition.

[0030] Furthermore, the specific method for determining whether a hybrid bus is in congested driving conditions includes:

[0031] When: the traffic light ahead is yellow and the duration of the yellow light exceeds the preset yellow light duration threshold.

[0032] Alternatively, it can use GPS location information to identify that there is congestion ahead and the distance to the vehicles ahead is gradually decreasing.

[0033] Then: Determine that the hybrid bus has entered a congested driving condition;

[0034] When: a vehicle passes through a traffic light intersection.

[0035] Furthermore, the congestion ahead has cleared.

[0036] Furthermore, the distance to the vehicle ahead exceeds the preset threshold for distance to the vehicle ahead.

[0037] Then: Determine that the hybrid bus has exited the congested driving condition.

[0038] Furthermore, the standard engine start-stop strategy includes: pre-setting engine normal start trigger conditions and engine normal stop trigger conditions; when the engine normal start trigger condition is met, the engine is controlled to start; when the engine normal stop trigger condition is met, the engine is controlled to stop.

[0039] The normal start-up trigger condition for the engine is:

[0040] The vehicle control module requests a torque greater than the engine start-up torque threshold.

[0041] Alternatively, the power battery SOC ≤ SOC low ,

[0042] Or, the engine coolant temperature is low. Eng ≤T low ;

[0043] The normal engine shutdown trigger condition is as follows:

[0044] The vehicle control module requests a torque that is less than the engine shutdown request torque threshold.

[0045] Furthermore, the SOC of the power battery is greater than or equal to the SOC of the battery. high ,

[0046] And, the engine coolant temperature T Eng ≥ T high ,

[0047] And, the EV mode is opened.

[0048] Further, when the power battery SOC value is lower than the SOC low , the engine start-stop strategy for the congestion driving condition is shielded.

[0049] Further, the hybrid passenger vehicle is a public passenger vehicle.

[0050] A hybrid passenger vehicle has a vehicle control module, and a program for implementing the engine start-stop control method is arranged in the vehicle control module.

[0051] In the engine start-stop control method and the hybrid passenger vehicle of the present application, the engine start-stop is controlled by setting a turning condition engine start-stop strategy for the turning driving condition of the hybrid passenger vehicle and a congestion condition engine start-stop strategy for the congestion driving condition of the hybrid passenger vehicle, and when the hybrid passenger vehicle is in the two conditions, the engine start-stop frequency can be reduced as much as possible.

[0052] The engine start-stop control method of the present application has the following advantages over the prior art:

[0053] 1) effectively prolongs the service life of the engine, and can also optimize the working characteristics of the engine and improve the economic efficiency of the vehicle;

[0054] 2) effectively reduces the vibration and noise of the vehicle, greatly improving the comfort of passengers. BRIEF DESCRIPTION OF DRAWINGS

[0055] Figure 1 is a schematic diagram of the electrical module of the hybrid passenger vehicle involved in the engine start-stop control method of the hybrid passenger vehicle of the present application;

[0056] Figure 2 is a flowchart of the program for implementing the engine start-stop control method of the hybrid passenger vehicle arranged in the vehicle control module of the hybrid passenger vehicle of the present application. EMBODIMENT

[0057] The present application will be further described below in conjunction with the drawings and specific embodiments:

[0058] The present embodiment provides an engine start-stop control method for a hybrid passenger vehicle, which can reduce the engine start-stop frequency in the turning driving condition and the congestion driving condition.

[0059] The hybrid passenger vehicle according to the present embodiment is a public passenger vehicle, and is operated on a pre-planned bus driving route.

[0060] The hybrid passenger vehicle according to the present embodiment is provided with an engine, a driving motor, and an ISG motor, wherein the driving motor is used to drive the vehicle to run (to drive the wheels), the ISG motor is used to generate electricity to charge the power battery, and the engine is used to output torque to assist the driving motor to drive the vehicle to run and to drive the ISG motor to generate electricity.

[0061] Referring to Figure 1 , the hybrid passenger vehicle is further provided with a vehicle control module, a GPS positioning module, an intelligent map module, a road condition sensing module, an electronic power steering system, and an engine control module.

[0062] As can be understood by those skilled in the art, the vehicle control module is usually provided on the current hybrid passenger vehicle, and is essentially a microcomputer module, which has the functions of setting and executing programs, and is used to control the torque output and distribution of the motor and the engine, to control the braking energy feedback, to control the energy management of the vehicle engine and the power battery, to control the network management, to control the fault diagnosis and processing, to control the vehicle state monitoring, and the like, so as to ensure that the vehicle normally and stably works in a better power performance, higher economy, and higher reliability state.

[0063] As can be understood by those skilled in the art, the GPS positioning module is usually provided on the current hybrid passenger vehicle, and is used to perform GPS positioning on the position where the hybrid passenger vehicle is located, and then to send the GPS positioning information to the communication bus.

[0064] As can be understood by those skilled in the art, the intelligent map module is usually provided on the current hybrid passenger vehicle, and has various functions based on the map, such as map navigation. In the present embodiment, the intelligent map module is used to import a pre-planned passenger vehicle driving route, to determine the specific point of the hybrid passenger vehicle on the passenger vehicle driving route according to the GPS positioning information of the hybrid passenger vehicle, and to send the turning information, the bus stop information, and the road congestion information in front of the driving route to the communication bus.

[0065] As mentioned above, the hybrid passenger vehicle according to the present embodiment is a public passenger vehicle, and therefore, the passenger vehicle driving route essentially refers to a pre-planned bus driving route.

[0066] As can be understood by those skilled in the art, the road condition sensing module is usually provided on the current hybrid passenger vehicle, and is used to detect and sense the road condition in front of the vehicle, and to transmit the detected and sensed road condition in the form of data to the communication bus.

[0067] The road condition perception module comprises a front-facing camera and a front-facing ranging radar arranged at the front of the hybrid passenger car, the front-facing camera is used to identify intersection traffic light information, traffic light state adjustment time and front obstacles (pedestrians or vehicles), and the front-facing ranging radar is used to identify front vehicle distance and distance change rate; in addition, a signal digitization conversion system is specially configured for the front-facing camera and the front-facing ranging radar, which is used to convert the identification detection information of the front-facing camera and the front-facing ranging radar into digital signals, and then send them to the communication bus in the form of a message.

[0068] As can be understood by those skilled in the art, the electronic power steering system, EHPS (abbreviation of English Electro-hydraulic power steering system), provides power assistance, improves vehicle steering performance, assists the driver in completing the steering operation, and transmits the steering wheel steering angle, EHPS speed and turn signal information to the communication bus. In the following description, EHPS represents the electronic power steering system.

[0069] As can be understood by those skilled in the art, the engine control module receives control instructions for the engine and converts the control instructions into electrical control signals to transmit to the engine to control the start-stop operation of the engine.

[0070] The engine start-stop control method of the embodiment comprises the following steps S1 to S4.

[0071] S1, during the driving of the hybrid passenger car, the vehicle control module arranged on the hybrid passenger car continuously judges the working condition of the hybrid passenger car according to various operating data information of the vehicle.

[0072] It should be noted that in the present embodiment, three working conditions are defined for the driving of the hybrid passenger car, namely "straight-line driving working condition", "turning driving working condition" and "congestion driving working condition", and the judgment of the working condition of the hybrid passenger car is actually to judge whether the hybrid passenger car is in the straight-line driving working condition, the turning driving working condition or the congestion driving working condition.

[0073] The turning driving working condition is defined as the condition that the vehicle is in or about to turn.

[0074] The congestion driving working condition is defined as the condition that the vehicle is in a road traffic congestion environment.

[0075] The straight driving condition is defined as the condition of the vehicle in normal straight driving, which is relative to the turning driving condition and the congestion driving condition, that is, other conditions except the turning driving condition and the congestion driving condition are attributed to the straight driving condition.

[0076] The specific method for determining whether the hybrid passenger car is in the turning driving condition includes:

[0077] 1) When:

[0078] the condition of "confirming receiving the electronic power steering system message" is met,

[0079] and the condition of "EHPS rotating speed n ≥ N EHPS " is met,

[0080] and the condition of "confirming receiving the intelligent map module message" is met,

[0081] and the condition of "the intelligent map module sending the signal of approaching turning or approaching station" is met (the distance between the vehicle head and the turning intersection or the station is less than the pre-set entering turning distance threshold, which is set as 20 m),

[0082] and the condition of "the turning light being on" or "the steering wheel angle exceeding the pre-set turning invalid angle threshold range" is met,

[0083] it is determined that the hybrid passenger car enters the turning driving condition, that is, the hybrid passenger car is in the turning driving condition.

[0084] In the embodiment, when the steering wheel angle is in the turning invalid angle threshold range, the turning is invalid, and vice versa, when the steering wheel angle exceeds the turning invalid angle threshold range, the turning is valid, so as to confirm the entering of the turning state; the turning invalid angle threshold range is set according to the vehicle type and the EHPS type.

[0085] 2) When:

[0086] the condition of "the intelligent map module sending the signal of driving away from the turning or the signal of leaving the station" is met (the distance between the vehicle tail and the intersection or the station exceeds the pre-set leaving turning distance threshold, which is set as 20 m),

[0087] and the condition of "the turning light being off" or "the steering wheel returning to the normal position" is met,

[0088] it is determined that the hybrid passenger car leaves the turning driving condition, that is, the hybrid passenger car is not in the turning driving condition.

[0089] It should be noted that the "EHPS rotating speed n ≥ N EHPS ", wherein n represents the EHPS rotating speed, NEHPS EHPS operating speed threshold value, to confirm that the EHPS is in an operating state.

[0090] As understood by those skilled in the art, the EHPS speed refers to the electronic power steering system steering pump speed, and when the steering pump reaches a certain speed, the EHPS can work normally.

[0091] It should be noted that the present embodiment provides a specific determination method for the cornering driving condition, but other embodiments according to the present application are not limited to the determination method for the cornering driving condition provided by the present embodiment, and in other embodiments, the specific determination method for the cornering driving condition can be set according to the actual situation of the vehicle.

[0092] The specific method for determining whether the hybrid passenger car is in the congestion driving condition includes:

[0093] 1) When:

[0094] the condition that the yellow light ahead is identified by the road condition perception module in advance and the time length of the yellow light is greater than the pre-set yellow light time length threshold value is met,

[0095] or, the condition that the congestion ahead is identified by the intelligent map module according to the positioning information of the GPS positioning module and the condition that the distance to the vehicle ahead is gradually reduced by the road condition perception module are met,

[0096] then: it is determined that the hybrid passenger car enters the congestion driving condition, i.e., the hybrid passenger car is in the congestion driving condition.

[0097] In the present embodiment, the yellow light time length threshold value is pre-set to 30s.

[0098] 2) When:

[0099] the condition that the vehicle passes through the red light intersection is identified by the intelligent map module is met,

[0100] and, the condition that the congestion ahead is eliminated is identified by the intelligent map module is met,

[0101] and, the condition that the distance to the vehicle ahead exceeds the pre-set front vehicle distance threshold value is met by the road condition perception module,

[0102] then: it is determined that the hybrid passenger car exits the congestion driving condition, i.e., the hybrid passenger car is not in the congestion driving condition.

[0103] The "front vehicle distance threshold value" is pre-set to 20m.

[0104] It should be noted that this embodiment provides a specific method for determining congested driving conditions. However, other embodiments of the present invention are not limited to the method for determining congested driving conditions provided in this embodiment. In other embodiments, the specific method for determining congested driving conditions can be set according to the actual situation of the vehicle.

[0105] When the hybrid bus is neither turning nor in congested traffic, it is determined that the hybrid bus is in a straight-line driving condition.

[0106] S2, when it is determined that the hybrid bus is in a straight-line driving condition, the engine start-stop is controlled according to the preset standard engine start-stop strategy.

[0107] The "standard engine start-stop strategy" refers to the control strategy for starting and stopping the engine during normal operation of a hybrid bus. Generally speaking, different models have different specific strategy items within their standard engine start-stop strategies. Here, "standard engine start-stop strategy" is a general term for the engine start-stop control strategies during normal operation.

[0108] In this embodiment, the standard engine start-stop strategy specifically includes:

[0109] The engine is pre-set with "normal engine start trigger conditions" and "normal engine stop trigger conditions". When the normal engine start trigger condition is met, the engine is controlled to start and enter the start state. When the normal engine stop trigger condition is met, the engine is controlled to stop and enter the stop state.

[0110] The normal start-up trigger condition for the engine is:

[0111] The condition "the vehicle control module requests a torque greater than the predetermined engine start-up torque threshold" is met (e.g., during acceleration or hill climbing).

[0112] Alternatively, "Power battery SOC ≤ SOC" low "The conditions are met (the engine must be started to drive the ISG motor to charge the power battery).

[0113] Or, "Engine coolant temperature is low" Eng ≤T low "Conditions are met (if no other engine requests conditions, idle mode can be maintained).

[0114] It should be noted that the vehicle control module requests torque is greater than the pre-set engine start request torque threshold, wherein the engine start request torque threshold indicates that when the vehicle control module requests torque is about to exceed the maximum available torque of the drive motor, the engine output torque needs to be started to assist driving the vehicle; the threshold is slightly less than the maximum available torque of the drive motor, and the specific value is set according to different vehicle models.

[0115] It should be noted that the power battery SOC is less than or equal to SOC low , wherein SOC low represents the lower threshold of the remaining power of the power battery, and the remaining power of the battery is lower than the threshold, which represents that the current remaining power of the battery is low and needs to be charged in time, otherwise the battery will be damaged due to over-discharge and its performance and service life will be affected. The specific value is set according to the type of the battery.

[0116] It should be noted that the engine coolant temperature T Eng is less than or equal to T low , wherein T low represents the low threshold of the engine coolant temperature, and if the engine coolant temperature is lower than the value, the engine start will be affected, and the engine should be started at this time. The specific value is set according to the type of the engine.

[0117] The engine normal stop trigger condition is:

[0118] The condition that "the vehicle control module requests torque is less than the pre-determined engine stop request torque threshold" is established,

[0119] and the condition that "the power battery SOC is greater than or equal to SOC high " is established,

[0120] and the condition that "the engine coolant temperature T Eng is greater than or equal to T high " is established,

[0121] and the condition that "the EV mode is turned on" is established.

[0122] It should be noted that the vehicle control module requests torque is less than the engine stop request torque threshold, wherein the engine stop request torque threshold indicates that the vehicle control module requests torque is less than the maximum available torque of the drive motor, and the drive motor can completely drive the vehicle to travel normally; the threshold is less than the engine start request torque threshold, and the specific value is set according to different vehicle models.

[0123] It should be noted that the power battery SOC is greater than or equal to SOC high , wherein SOC highrepresents an upper threshold of the remaining power of the power battery, and the remaining power of the battery is higher than the threshold, which means that the current battery power is sufficient and does not need to be charged. The specific value is set according to the type of the battery.

[0124] It should be noted that the engine coolant temperature T Eng ≥ T high , wherein T high represents an upper threshold of the engine coolant temperature. If the engine coolant temperature is higher than the value, the engine can be normally started, and the engine does not need to be started to warm up. The specific value is set according to the type of the engine.

[0125] Those skilled in the art can understand that the EV mode is a pure electric mode, the vehicle is driven by the driving motor, and the engine does not participate in work.

[0126] It should be noted that in the process of "when the normal engine stop triggering condition is established, the engine is controlled to stop", when the normal engine stop triggering condition is established, the engine is first controlled to delay for 5 seconds, and then the engine is controlled to stop without other engine requests in the delay time. The purpose of the delay is to avoid the establishment of other conditions triggering the engine start in a very short time, resulting in frequent start and stop of the engine.

[0127] S3, when it is determined that the hybrid passenger car is in a turning driving working condition, the engine start-stop is controlled according to a pre-set engine start-stop strategy in the turning working condition.

[0128] The "engine start-stop strategy in the turning working condition" specifically includes:

[0129] 1) maintaining the engine start-stop state of the hybrid passenger car before entering the turning driving working condition.

[0130] Here, the "maintaining the engine start-stop state of the hybrid passenger car before entering the turning driving working condition" specifically means that:

[0131] If the engine is in a start state before the hybrid passenger car enters the turning driving working condition,

[0132] then, after the hybrid passenger car enters the turning driving working condition, the engine is controlled to maintain the start state, and the engine is controlled to enter the idle mode;

[0133] If the engine is in a stop state before the hybrid passenger car enters the turning driving working condition,

[0134] then, after the hybrid passenger car enters the turning driving working condition, the engine is controlled to maintain the stop state;

[0135] 2) After the hybrid bus leaves the turning driving condition and enters the straight driving condition, the engine start-stop is controlled according to the preset standard engine start-stop strategy.

[0136] S4, when it is determined that the hybrid bus is in a congested driving condition, the engine start-stop is controlled according to the pre-set congested driving condition engine start-stop strategy.

[0137] The specific details of the "engine start-stop strategy under congested conditions" are as follows:

[0138] 1) Control the engine to stop, bringing the engine into a stopped state;

[0139] 2) After the hybrid bus leaves the congested driving condition and enters the straight driving condition, there is a 5-second delay, after which the engine start-stop is controlled according to the preset standard engine start-stop strategy.

[0140] The purpose of this delay is to avoid entering the next congestion phase in a short period of time, which would cause the engine to stop again.

[0141] When a hybrid bus is in congested traffic, the engine will not start even if the driver presses the accelerator pedal to speed up.

[0142] It should be noted that the engine start-stop strategy for congested driving conditions has a blocking condition: when the SOC value of the power battery is lower than the lower limit threshold of the remaining power battery charge. low In such cases, the engine start-stop strategy for congested driving conditions is disabled, and the engine is started to charge the battery. In other words, when the battery's State of Charge (SOC) value falls below a predetermined "lower limit threshold for remaining battery charge," the system will activate the battery. low "Even if the hybrid bus enters a congested driving condition, the engine start-stop strategy for congested driving conditions will not be implemented."

[0143] The significance of setting the shielding condition is as follows: As mentioned earlier, when the SOC value of the power battery is lower than the lower limit threshold of the remaining power battery capacity, the SOC value is... low When this happens, the power battery must be charged. If the hybrid bus is in congested driving conditions for a long time and the engine cannot start, the whole vehicle will continuously consume the power battery's charge, causing the power battery to be over-discharged; therefore, in order to protect the battery, this shielding condition must be set.

[0144] It should be noted that the term "engine start-stop" mentioned in this article refers to "the starting and stopping of the engine".

[0145] It should be noted that in the engine start-stop control method of this embodiment, there is no absolute time sequence between the steps.

[0146] It should be noted that the engine start-stop control method provided above is set in the vehicle control module of the hybrid passenger vehicle in the form of a program, that is, the embodiment provides a hybrid passenger vehicle, and the vehicle control module of the hybrid passenger vehicle is provided with a program for implementing the engine start-stop control method, and the vehicle control module executes the program to implement the engine start-stop control method.

[0147] The specific flow of setting the program in the vehicle control module is shown in the embodiment. Figure 2 , Figure 2 The specific flow of setting the program in the vehicle control module is shown in the embodiment.

[0148] In the engine start-stop control method and the hybrid passenger vehicle of the embodiment, the turning condition engine start-stop strategy is set for the turning driving condition of the hybrid passenger vehicle to control the engine start-stop, the congestion condition engine start-stop strategy is set for the congestion driving condition of the hybrid passenger vehicle to control the engine start-stop, and based on the turning condition engine start-stop strategy and the congestion condition engine start-stop strategy, when the hybrid passenger vehicle is in the two conditions, the engine start-stop frequency is reduced as much as possible, so on the one hand, the service life of the engine is effectively prolonged, and the working characteristics of the engine are optimized, the running economy of the vehicle is improved, and on the other hand, the vibration and noise of the vehicle are effectively reduced, and the comfort of the passengers is greatly improved.

[0149] The above is only a preferred embodiment of the present application, and is not used to limit the protection scope of the present application, therefore, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method of engine start-stop control for a hybrid passenger vehicle, characterized by: The engine start-stop control method comprises: judging the working condition of the hybrid passenger car during the driving process of the hybrid passenger car; when it is judged that the hybrid passenger car is in the straight-line driving working condition, the engine start-stop is controlled according to the pre-set standard engine start-stop strategy; when it is judged that the hybrid passenger car is in the turning driving working condition, the engine start-stop is controlled according to the pre-set turning working condition engine start-stop strategy; when it is judged that the hybrid passenger car is in the congestion driving working condition, the engine start-stop is controlled according to the pre-set congestion working condition engine start-stop strategy; the turning working condition engine start-stop strategy comprises: maintaining the engine start-stop state before the hybrid passenger car enters the turning driving working condition; after the hybrid passenger car leaves the turning driving working condition and enters the straight-line driving working condition, the engine start-stop is restored to be controlled according to the standard engine start-stop strategy; the congestion working condition engine start-stop strategy comprises: controlling the engine to stop; after the hybrid passenger car leaves the congestion driving working condition and enters the straight-line driving working condition, the engine start-stop is restored to be controlled according to the standard engine start-stop strategy; the congestion working condition engine start-stop strategy further comprises: after the hybrid passenger car leaves the congestion driving working condition and enters the straight-line driving working condition, and before the engine start-stop is restored to be controlled according to the standard engine start-stop strategy, delaying for 5 seconds.

2. The method of claim 1, wherein: the specific judging method of judging that the hybrid passenger car is in the turning driving working condition comprises: When: confirming receiving the electronic power steering system message of the hybrid bus, and EHPS speed ≥ N EHPS And confirming receiving the intelligent map module message of the hybrid bus, and the intelligent map module of the hybrid bus sends the signal of imminent turning or imminent entering station, and the turn signal is on or the steering wheel corner exceeds the pre-set steering invalid corner threshold range, then: determining that the hybrid bus enters the turning driving working condition; when the intelligent map module of the hybrid passenger car sends a driving-off turning or outbound signal, and the turn signal is off or the steering wheel is returned to the normal position, it is judged that the hybrid passenger car leaves the turning driving working condition.

3. The method of claim 1, wherein: the specific judging method of judging that the hybrid passenger car is in the congestion driving working condition comprises: when the front red-green light is yellow and the time length of the yellow light is greater than a pre-set yellow light time length threshold, or the front congestion is recognized according to the GPS positioning information and the distance to the front vehicle is gradually reduced, it is judged that the hybrid passenger car enters the congestion driving working condition; when the vehicle passes through the red-green light intersection, the front congestion is eliminated, and the distance to the front vehicle is greater than a pre-set front vehicle distance threshold, it is judged that the hybrid passenger car leaves the congestion driving working condition.

4. The method of claim 1, wherein: the standard engine start-stop strategy comprises: pre-setting engine normal start trigger conditions and engine normal stop trigger conditions; when the engine normal start trigger conditions are met, the engine is started; when the engine normal stop trigger conditions are met, the engine is stopped; the engine normal start trigger conditions are: The whole vehicle control module requests the torque to be greater than the engine starting request torque threshold, or, the power battery SOC ≤ SOC low , or, the engine coolant temperature T Eng ≤ T low ; the engine normal stop trigger conditions are: The vehicle control module requests torque less than the engine stop request torque threshold, and the power battery SOC ≥ SOC high And the engine coolant temperature T Eng ≥ T high And the EV mode is opened.

5. The method of claim 1, wherein: When the power battery SOC value is lower than SOC low , the engine start-stop strategy for congestion condition is shielded.

6. The method of claim 1, wherein: the hybrid passenger car is a public passenger vehicle.

7. A hybrid bus having a vehicle control module, characterized by: the vehicle control module is provided with a program for realizing the engine start-stop control method according to any one of claims 1 to 6.

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