Vehicle starting control method and device, power control unit and vehicle air inlet system

Abstract

The invention provides a vehicle starting control method and device, a power control unit and a vehicle air inlet system, and relates to the technical field of engines. The method comprises the steps of detecting a vehicle state; if the vehicle state is that the vehicle is in the starting stage and the clutch is in the fitting stage, the maximum available torque of the engine, the actual torque of the engine and the reference torque are obtained; if the difference value between the maximum available torque and the actual torque is smaller than or equal to a first preset threshold value, the specific value of the actual torque and the reference torque is smaller than or equal to a second preset threshold value, and the pressure of the air storage tank is larger than or equal to the safety pressure needed by braking; if yes, an electromagnetic valve between the gas storage tank and the engine is controlled to be opened through a power control unit of the vehicle, so that the gas storage tank provides gas for the engine. According to the method, the gas storage tank is additionally arranged in the gas inlet system of the vehicle, and when the preset conditions are met, the gas storage tank provides gas for the engine to improve the starting performance of the vehicle.

Description

Technical Field

[0001] The present application relates to the field of engine technology, and in particular to a vehicle starting control method, device, power control unit and vehicle intake system. Background Art

[0002] Due to their large cargo capacity, heavy-duty commercial vehicles often have problems such as slow starting, insufficient starting power, and uneven starting. These problems are particularly prominent when starting on a slope.

[0003] In the prior art, the smooth transition of power transmission is mainly achieved by finely regulating the clutch engagement process, including finely adjusting the clutch engagement speed and engagement depth. At the same time, the engine output torque and its change slope are dynamically adjusted to better match the actual starting requirements of the vehicle, thereby optimizing the vehicle's starting performance.

[0004] However, existing methods rely on precise control of the clutch and cannot effectively solve the problems of slow vehicle start, insufficient starting power and uneven start. Summary of the invention

[0005] The present application provides a vehicle starting control method, device, power control unit and vehicle air intake system to improve the starting performance of the vehicle.

[0006] In a first aspect, the present application provides a vehicle starting control method, the method comprising:

[0007] Detect vehicle status;

[0008] If the vehicle is in the starting stage and the clutch is in the engagement stage, the maximum available torque of the engine, the actual torque of the engine and the reference torque are obtained. The starting stage is the stage from the driver pressing the accelerator to the first gear shift;

[0009] If the difference between the maximum available torque and the actual torque is less than or equal to the first preset threshold, and the ratio of the actual torque to the reference torque is less than or equal to the second preset threshold, and the air tank pressure is greater than or equal to the safety pressure required for braking, the solenoid valve between the air tank and the engine is controlled by the vehicle's power control unit to open, so that the air tank supplies gas to the engine.

[0010] In a possible design, after the solenoid valve between the gas tank and the engine is controlled to open, it also includes:

[0011] The butterfly valve on the intake manifold between the turbine and the engine is partially closed by the power control unit.

[0012] In one possible design, the method further includes:

[0013] Obtain required air intake, actual air intake and air supplement;

[0014] If the difference between the required intake volume and the actual intake volume is less than or equal to the supplementary air volume, the power control unit controls the solenoid valve to close and the butterfly valve on the intake manifold to open.

[0015] In a possible design, the process of obtaining the supplementary gas volume includes:

[0016] Obtain the number of cylinders of the engine, the external characteristic torque at the current speed calibrated by the engine, the requested torque, the current speed, and the fuel efficiency coefficient;

[0017] The amount of supplementary air is calculated according to the number of cylinders of the engine, the external characteristic torque at the current speed calibrated by the engine, the requested torque, the current speed, and the fuel efficiency coefficient.

[0018] In a possible design, the amount of supplementary air is calculated according to the number of cylinders of the engine, the external characteristic torque at the current speed calibrated by the engine, the requested torque, the current speed, and the fuel efficiency coefficient, including:

[0019] The gas replenishment volume is calculated using the following formula:

[0020]

[0021] Among them, m air_extra is the amount of air supply, n is the number of cylinders in the engine, λ is the excess air coefficient, t ormax is the external characteristic torque at the current speed of the engine, A is the requested torque issued by the gearbox to the engine, R is the ideal gas constant, T is the thermodynamic temperature of the gas, P is the pressure of the gas, M is the molar mass of the air, and n Eng_Speed is the current speed of the engine, η feul is the fuel efficiency factor.

[0022] In a possible design, detecting the vehicle status includes:

[0023] Get the engine type;

[0024] If the engine type is a turbocharged engine, the vehicle state is detected.

[0025] In a second aspect, the present application provides a vehicle air intake system, the system comprising: an air tank, a turbine, an engine, and a power control unit;

[0026] The gas tank is connected to the engine through a pipeline, and a solenoid valve is provided on the pipeline;

[0027] The turbine and the engine are connected through an intake manifold, on which a butterfly valve is provided;

[0028] Power control unit communicates to solenoid valve and butterfly valve

[0029] In a possible design, the air storage tank and the original air tank of the vehicle are connected to the air compressor through a four-way valve, and the original air tank of the vehicle is connected to the brake system.

[0030] In a third aspect, the present application provides a vehicle starting control device, the device comprising:

[0031] A detection module, used for detecting the vehicle status;

[0032] an acquisition module, for acquiring the maximum available torque of the engine, the actual torque of the engine and the reference torque if the vehicle state is that the vehicle is in the starting stage and the clutch is in the engagement stage, the starting stage being the stage from when the driver steps on the accelerator to when the first gear shift is made;

[0033] The air supply module is used to control the solenoid valve between the air tank and the engine to open through the vehicle's power control unit if the difference between the maximum available torque and the actual torque is less than or equal to a first preset threshold, and the ratio of the actual torque to the reference torque is less than or equal to a second preset threshold, and the air tank pressure is greater than or equal to the safety pressure required for braking, so that the air tank supplies gas to the engine.

[0034] In one possible design, the device further includes: a closing module;

[0035] The closing module is used to control the partial closing of the butterfly valve on the intake manifold between the turbine and the engine through the power control unit.

[0036] In one possible design, the device further includes: a gas volume acquisition module and an exit module;

[0037] The air volume acquisition module is used to obtain the required air volume, actual air volume and supplementary air volume;

[0038] The exit module is used to control the solenoid valve to close and the butterfly valve on the intake manifold to open through the power control unit if the difference between the required intake volume and the actual intake volume is less than or equal to the supplementary air volume.

[0039] In a possible design, the gas volume acquisition module includes: a parameter acquisition module and a calculation module;

[0040] The parameter acquisition module is used to obtain the number of cylinders of the engine, the external characteristic torque at the current speed of the engine, the requested torque, the current speed, and the fuel efficiency coefficient;

[0041] The calculation module is used to calculate the air supply amount according to the number of cylinders of the engine, the external characteristic torque at the current speed calibrated by the engine, the requested torque, the current speed, and the fuel efficiency coefficient.

[0042] In a possible design, the calculation module is further used to calculate the supplementary gas volume by the following formula:

[0043]

[0044] Among them, m air_extra is the amount of air supply, n is the number of cylinders in the engine, λ is the excess air coefficient, t ormax is the external characteristic torque at the current speed of the engine, A is the requested torque issued by the gearbox to the engine, R is the ideal gas constant, T is the thermodynamic temperature of the gas, P is the pressure of the gas, M is the molar mass of the air, and n Eng_Speed is the current speed of the engine, η feul is the fuel efficiency factor.

[0045] In a possible design, the detection module includes: an acquisition type module and a state detection module;

[0046] Get type module, used to get the type of engine;

[0047] The state detection module is used to detect the vehicle state if the engine type is a turbocharged engine.

[0048] In a fourth aspect, the present application provides a power control unit of a vehicle, comprising: a processor, and a memory communicatively connected to the processor;

[0049] Memory stores computer-executable instructions;

[0050] The processor executes the computer-executable instructions stored in the memory to implement a vehicle starting control method according to the first aspect of the invention.

[0051] In a fifth aspect, the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement a vehicle starting control method according to the invention content of the first aspect.

[0052] In a sixth aspect, the present application provides a computer program product, including a computer program, which, when executed by a processor, is used to implement a vehicle starting control method according to the invention content of the first aspect.

[0053] The present application provides a vehicle starting control method, device, power control unit and vehicle intake system, the method comprising: detecting the vehicle state; if the vehicle state is that the vehicle is in the starting stage and the clutch is in the engagement stage, obtaining the maximum available torque of the engine, the actual torque of the engine and the reference torque, the starting stage being the stage between the driver stepping on the accelerator and the first gear shift; if the difference between the maximum available torque and the actual torque is less than or equal to a first preset threshold, and the ratio of the actual torque to the reference torque is less than or equal to a second preset threshold, and the air tank pressure is greater than or equal to the safety pressure required for braking, then the solenoid valve between the air tank and the engine is controlled to open by the vehicle's power control unit so that the air tank supplies gas to the engine. The following technical effects are achieved: by adding an air tank to the vehicle's air intake system, the vehicle state is detected when the vehicle starts, and when the preset conditions are met, additional gas is provided to the engine through the air tank to improve the vehicle's starting performance; by adding an air tank to the air intake system, additional pressurized air can be provided to the engine when needed to compensate for the influence of turbo lag, thereby helping to increase the engine's air intake volume, increase the engine's fuel injection volume and combustion efficiency, and higher combustion efficiency can generate more torque and improve the engine's dynamic response capability, and the increase in engine speed allows the turbine to quickly build up intake pressure, avoiding It prevents the engine from speeding too low when the load increases, thereby preventing the vehicle from shaking when starting or driving at low speeds. At the same time, the increase in the engine's actual torque provides stronger power for starting, which can increase the starting speed, ensure that the vehicle can accelerate smoothly and quickly during the starting phase, and improve the vehicle's starting performance. When the conditions are met, a signal is sent through the vehicle's power control unit to control the solenoid valve between the air tank and the engine to open, so that the pressurized air in the air tank is delivered to the engine's intake system to increase the intake volume. The additional pressurized air helps to increase the engine's intake density, thereby increasing the fuel injection amount and improving the engine's torque output. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0055] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0056] Figure 1 A schematic diagram of a vehicle air intake system provided in an embodiment of the present application Figure 1 ;

[0057] Figure 2 A schematic diagram of a vehicle air intake system provided in an embodiment of the present application Figure 2 ;

[0058] Figure 3 A schematic diagram of a vehicle start control method provided in an embodiment of the present application Figure 1 ;

[0059] Figure 4 A schematic diagram of a vehicle start control method provided in an embodiment of the present application Figure 2 ;

[0060] Figure 5 A schematic diagram of the structure of a vehicle starting control device provided in an embodiment of the present application;

[0061] Figure 6 A schematic diagram of the structure of a power control unit of a vehicle provided in an embodiment of the present application.

[0062] Reference numerals:

[0063] 110-gas tank; 120-turbine; 130-engine; 140-power control unit; 150-pipeline; 160-solenoid valve; 170-intake manifold; 180-butterfly valve; 190-exhaust manifold;

[0064] 210-Original vehicle gas tank; 220-Four-way valve; 230-Air compressor; 240-Brake system;

[0065] 510-detection module; 520-acquisition module; 530-gas supply module;

[0066] 610 - processor; 620 - memory; 630 - communication component; 640 - bus. DETAILED DESCRIPTION

[0067] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0068] In the embodiments of the present application, words such as "first" and "second" are used to distinguish between identical or similar items with substantially the same functions and effects. Those skilled in the art will appreciate that words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit the difference. It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way. In the embodiments of the present application, "at least one" refers to one or more, and "more" refers to two or more.

[0069] It should be noted that the "at..." in the embodiment of the present application can be the instant when a certain situation occurs, or can be a period of time after a certain situation occurs, and the embodiment of the present application does not specifically limit this. In addition, the vehicle start control method provided in the embodiment of the present application is only used as an example, and the vehicle start control method can also include more or less content.

[0070] In order to clearly describe the technical solutions of the embodiments of the present application, some terms and technologies involved in the embodiments of the present application are briefly introduced below:

[0071] Power Control Unit (PCU): It is the power control center of a motor vehicle, mainly responsible for receiving signals from sensors and sending control signals through dedicated ports. It is responsible for managing and controlling the power output of the vehicle, including the operating status of the engine or motor, the shift control of the transmission, etc. Specifically, it monitors various parameters of the engine, such as speed, temperature, intake volume, etc.; adjusts the engine torque output to adapt to different driving conditions; receives data from driver input (such as accelerator pedal position) and other sensors; controls the fuel injection system, adjusts the injection amount and injection timing; controls the shift logic and timing of the automatic transmission, etc.

[0072] Due to their large cargo capacity, heavy-duty commercial vehicles often face problems such as slow starting response, insufficient starting power, and uneven starting during starting, which are particularly prominent when starting on a slope. This is because at the beginning of the vehicle's start, the engine speed is low and the turbocharger's working efficiency is relatively low, so the engine's intake volume is insufficient, which limits the engine's torque output and power performance.

[0073] That is to say, when the vehicle starts, especially for heavy vehicles, the engine's insufficient torque output will lead to insufficient starting power for the vehicle, causing the vehicle to start slowly. It will also affect the smoothness of the vehicle's start, causing the vehicle to start unevenly.

[0074] In order to solve these problems, the existing technology generally adopts a method of finely adjusting the engagement speed and depth of the clutch, and dynamically adjusting the requested torque of the engine and its change slope.

[0075] Although these methods can improve the vehicle's starting performance to a certain extent by improving the clutch control accuracy, they still have limitations. Specifically, in actual operation, due to heavy vehicle loads, complex and changeable road conditions, and wear and performance differences of components such as the clutch and engine, relying solely on precise control of the clutch is usually difficult to fully and effectively solve the problems of slow starting, insufficient power, and poor smoothness. In other words, relying solely on precise control of the clutch cannot completely solve the above problems, especially under complex working conditions, such as heavy loads or starting on a slope.

[0076] Therefore, the methods of the prior art rely too much on the precise control of the clutch operation, while neglecting to fully tap the potential of the engine itself. Specifically, the traditional starting control method usually fails to fully utilize the maximum available torque of the engine under specific working conditions, especially in turbocharged engines, because the engine's intake efficiency is insufficient at low speeds, and the actual torque output of the engine is usually severely restricted. As a result, during the vehicle starting process, the vehicle's power response is not fast enough, and the smoothness is also affected, resulting in a decrease in driving experience.

[0077] That is to say, during the vehicle's starting phase, especially when the engine speed is low, the engine's torque output is usually limited, resulting in the vehicle's power response being insufficient, an uneven start, and affecting the driving experience.

[0078] Based on this, the embodiments of the present application propose a vehicle starting control method, device, power control unit and vehicle intake system, which can be used in the field of engine technology, aiming to solve the above technical problems of the prior art, so as to improve the starting performance of the vehicle, thereby solving problems such as slow vehicle starting, insufficient starting power and uneven starting.

[0079] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0080] Figure 1A schematic diagram of a vehicle air intake system provided in an embodiment of the present application Figure 1 .like Figure 1 As shown, the vehicle intake system includes: an air tank 110, a turbine (turbocharger) 120, an engine 130, and a power control unit 140. Among them, the air tank 110 can be implemented as a high-pressure gas cylinder, which can be used to store compressed gas. The air tank 110 is connected to the engine 130 through a pipeline 150, and a solenoid valve 160 is provided on the pipeline 150. The turbine 120 and the engine 130 are connected through an intake manifold 170, and a butterfly valve 180 is provided on the intake manifold 170. The power control unit 140 is communicatively connected to the solenoid valve 160 and the butterfly valve 180. In addition, the exhaust gas after combustion of the engine 130 enters the turbine (Turbine) part of the turbine 120 through the exhaust manifold 190, drives the turbine impeller to rotate, and then drives the compressor coaxially connected to the turbine to increase the amount of air entering the engine 130, thereby increasing the output power of the engine 130. After driving the turbine, the exhaust gas is discharged from the vehicle through the exhaust pipe.

[0081] Figure 2 A schematic diagram of a vehicle air intake system provided in an embodiment of the present application Figure 2 This structure is Figure 1 Based on the structure, the connection method of the gas storage tank 110 is further described. Figure 2 As shown, the air storage tank 110 and the original vehicle air tank 210 of the vehicle are connected to the air compressor 230 through a four-way valve 220 , and the original vehicle air tank 210 is connected to the brake system 240 .

[0082] The power control unit 140 is the executor of the vehicle starting control method. The embodiment of the present application adds an air tank 110 to the vehicle intake system, thereby detecting the vehicle status when the vehicle starts, and providing additional gas to the engine 130 through the air tank 110 when the preset conditions are met to improve the vehicle's starting performance.

[0083] The technical solution of the present application is described in detail below in conjunction with specific embodiments.

[0084] Optionally, Figure 3 A schematic diagram of a vehicle start control method provided in an embodiment of the present application Figure 1 The method can be applied to the power control unit of a vehicle, such as Figure 3 As shown, the method includes:

[0085] S301, detecting vehicle status.

[0086] In the embodiment of the present application, the power control unit of the vehicle first detects whether the vehicle is in the starting stage.

[0087] S302: If the vehicle is in the starting stage and the clutch is in the engagement stage, the maximum available torque of the engine, the actual torque of the engine and the reference torque are obtained.

[0088] In the embodiment of the present application, the starting stage is the stage between when the driver steps on the accelerator and when the first gear shift occurs.

[0089] The maximum available torque of an engine refers to the maximum torque value that the engine can produce under the current engine operating conditions (such as engine speed, coolant temperature, air flow, etc.). This value represents the performance limit of the engine under ideal conditions. It is the maximum torque value that can be achieved based on the engine design and current operating conditions.

[0090] The actual torque of the engine refers to the torque that the engine can actually provide under the actual operating state of the current engine, taking into account all limiting factors (such as turbo lag, intake efficiency, fuel supply, etc.). The actual torque is usually less than or equal to the maximum available torque, depending on the current operating conditions of the engine, especially at low speed or special conditions.

[0091] Reference torque refers to a preset target torque value used to compare and control the actual torque of the engine during the start-up phase. The reference torque is usually pre-set based on the vehicle design and control strategy to ensure that the vehicle can accelerate smoothly and efficiently during the start-up phase.

[0092] During the vehicle's starting phase, especially during the clutch engagement process, the engine load gradually increases as the clutch gradually engages. This is because the clutch engagement gradually transfers the engine's power to the gearbox and wheels, causing the engine to provide more torque to overcome the vehicle's inertia and start accelerating.

[0093] In order to prevent the engine from stalling in this situation, the gearbox will send a torque control signal to the engine to adjust the engine's output torque. At the same time, in order to ensure smoothness and rapidity of starting, the gearbox usually requests the engine to quickly increase torque, but due to the hysteresis characteristics of the turbocharger, that is, the turbocharger requires a certain amount of exhaust gas flow to drive its turbine impeller, and at low speeds, the engine exhausts less exhaust gas, resulting in the turbocharger being unable to immediately provide the required boost air.

[0094] In this case, if an air tank is not added to the vehicle's air intake system, the engine's air intake may be lower than the required value, resulting in limited fuel injection, because the engine's fuel injection system usually adjusts the fuel injection amount according to the air intake. If the air intake is insufficient, the fuel injection amount will also be limited, resulting in limited actual engine torque, affecting the vehicle's starting performance.

[0095] Therefore, by adding an air tank to the intake system, additional pressurized air can be provided to the engine when needed to compensate for the effects of turbo hysteresis. This helps to increase the intake volume of the engine, increase the fuel injection volume and combustion efficiency of the engine. Higher combustion efficiency can produce more torque and improve the dynamic response of the engine. The increase in engine speed allows the turbine to quickly build up intake pressure, preventing the engine from rotating too low when the load increases, thereby preventing the vehicle from shaking when starting or driving at low speed. At the same time, the increase in the actual torque of the engine provides stronger power for starting, which can increase the starting speed, ensure that the vehicle can accelerate smoothly and quickly at the starting stage, and improve the starting performance of the vehicle.

[0096] S303. If the difference between the maximum available torque and the actual torque is less than or equal to the first preset threshold, and the ratio of the actual torque to the reference torque is less than or equal to the second preset threshold, and the air tank pressure is greater than or equal to the safety pressure required for braking, the solenoid valve between the air tank and the engine is controlled by the vehicle's power control unit to open so that the air tank supplies gas to the engine.

[0097] In the embodiment of the present application, the power control unit controls the solenoid valve between the gas tank and the engine to open, thereby providing additional gas to the engine.

[0098] Specifically, if the difference between the maximum available torque and the actual torque is less than or equal to a first preset threshold (such as 5%), it indicates that the current actual torque output of the engine is close to its maximum available torque, indicating that the engine has approached the engine performance limit (smoke limit, also known as smoke limit) of the preset emission rules.

[0099] The ratio of the actual torque to the reference torque is less than or equal to the second preset threshold value (such as 95%), indicating that the actual torque output of the engine does not reach the expected torque required for the vehicle to start, and additional boost air is needed to increase the torque output. At the same time, by setting the second preset threshold value, it is also possible to prevent the fuel injection amount from continuing to increase when the engine has approached or reached its external characteristic torque.

[0100] The air tank pressure is greater than or equal to the safety pressure required for braking, which ensures that the pressure in the air tank is high enough to safely provide pressurized air to the engine while ensuring the normal operation of the braking system.

[0101] When all three conditions are met, the vehicle's power control unit sends a signal to control the solenoid valve between the air tank and the engine to open, so that the pressurized air in the air tank is delivered to the engine's intake system to increase the intake volume. The additional pressurized air helps to increase the engine's intake density, thereby increasing the amount of fuel injection and improving the engine's torque output.

[0102] By making the difference between the maximum available torque and the actual torque less than or equal to the first preset threshold, the engine can be made to comply with the engine performance limit of the preset emission regulations.

[0103] The present embodiment provides a vehicle starting control method, the method comprising: detecting a vehicle state; if the vehicle state is that the vehicle is in a starting stage and the clutch is in an engagement stage, obtaining the maximum available torque of the engine, the actual torque of the engine and a reference torque, the starting stage being the stage from when the driver steps on the accelerator to when the first gear shift occurs; if the difference between the maximum available torque and the actual torque is less than or equal to a first preset threshold, and the ratio of the actual torque to the reference torque is less than or equal to a second preset threshold, and the air tank pressure is greater than or equal to the safety pressure required for braking, controlling the solenoid valve between the air tank and the engine to open through the vehicle's power control unit so that the air tank supplies gas to the engine. The following technical effects are achieved: by adding an air tank to the vehicle's air intake system, the vehicle state is detected when the vehicle starts, and when the preset conditions are met, additional gas is provided to the engine through the air tank to improve the vehicle's starting performance; by adding an air tank to the air intake system, additional pressurized air can be provided to the engine when needed to compensate for the influence of turbo lag, thereby helping to increase the engine's air intake volume, increase the engine's fuel injection volume and combustion efficiency, and higher combustion efficiency can generate more torque and improve the engine's dynamic response capability, and the increase in engine speed allows the turbine to quickly build up intake pressure, avoiding It prevents the engine from speeding too low when the load increases, thereby preventing the vehicle from shaking when starting or driving at low speeds. At the same time, the increase in the engine's actual torque provides stronger power for starting, which can increase the starting speed, ensure that the vehicle can accelerate smoothly and quickly during the starting phase, and improve the vehicle's starting performance. When the conditions are met, a signal is sent through the vehicle's power control unit to control the solenoid valve between the air tank and the engine to open, so that the pressurized air in the air tank is delivered to the engine's intake system to increase the intake volume. The additional pressurized air helps to increase the engine's intake density, thereby increasing the fuel injection amount and improving the engine's torque output.

[0104] Figure 4 A schematic diagram of a vehicle start control method provided in an embodiment of the present application Figure 2 In one possible example, Figure 4 As shown, in this embodiment Figure 3 Based on the embodiment, how the vehicle power control unit calculates the amount of air supplied by the gas tank to the engine and how to exit the state of gas supply from the gas tank is described in detail. Figure 4 As shown, the method includes:

[0105] S401: Obtain the type of engine.

[0106] In the embodiment of the present application, the power control unit of the vehicle first obtains the type of engine in the vehicle.

[0107] S402: If the engine type is a turbocharged engine, detect the vehicle state.

[0108] The method in the embodiment of the present application is applicable to an engine equipped with a turbocharger, so before detecting the state of the vehicle, it can be confirmed that the type of the engine is a turbocharged engine, and then detect whether the vehicle state is in the starting stage.

[0109] S403: If the vehicle is in the starting stage and the clutch is in the engagement stage, the maximum available torque of the engine, the actual torque of the engine and the reference torque are obtained.

[0110] S404. If the difference between the maximum available torque and the actual torque is less than or equal to the first preset threshold, and the ratio of the actual torque to the reference torque is less than or equal to the second preset threshold, and the air tank pressure is greater than or equal to the safety pressure required for braking, the solenoid valve between the air tank and the engine is controlled by the vehicle's power control unit to open so that the air tank supplies gas to the engine.

[0111] S403 - S404 are similar to S302 - S303 and will not be described in detail in this embodiment.

[0112] S405. The power control unit controls the butterfly valve on the intake manifold between the turbine and the engine to be partially closed.

[0113] Specifically, when gas is supplied to the engine through the gas tank, the butterfly valve on the intake manifold between the turbine and the engine is partially closed by the power control unit to prevent the gas released from the gas tank from impacting the turbine.

[0114] S406: Obtain the required air intake volume, the actual air intake volume and the supplementary air volume.

[0115] Specifically, the power control unit can further obtain the required air intake volume, actual air intake volume and supplementary air volume of the engine to determine whether to exit the state of supplying air through the air tank.

[0116] S407: If the difference between the required air intake volume and the actual air intake volume is less than or equal to the air supply volume, the power control unit controls the solenoid valve to close and controls the butterfly valve on the air intake manifold to open.

[0117] Specifically, if the difference between the required intake volume and the actual intake volume is less than or equal to the supplementary air volume, it indicates that the engine has sufficient air supply and no longer needs to be supplemented by the air tank. The power control unit can then control the solenoid valve to close, exiting the state of supplying air through the air tank, and control the butterfly valve on the intake manifold to open, thereby restoring the state of supplying air to the engine through the turbocharger.

[0118] Furthermore, the process of obtaining the gas replenishment volume includes:

[0119] Obtaining the number of cylinders of the engine, the external characteristic torque at the current speed calibrated by the engine, the requested torque of the engine, the current speed of the engine, and the fuel efficiency coefficient of the engine;

[0120] The air supply volume is calculated based on the number of cylinders of the engine, the external characteristic torque at the current speed of the engine, the requested torque, the current speed, and the fuel efficiency coefficient. Specifically, the air supply volume is calculated using the following formula:

[0121]

[0122] Among them, m air_extra is the amount of air supply, n is the number of cylinders in the engine, λ is the excess air coefficient, t ormax is the external characteristic torque at the current speed of the engine, A is the requested torque issued by the gearbox to the engine, R is the ideal gas constant, T is the thermodynamic temperature of the gas, P is the pressure of the gas, M is the molar mass of the air, and n Eng_Speed is the current speed of the engine, η feul is the fuel efficiency factor.

[0123] A vehicle starting control method provided in an embodiment of the present application controls the butterfly valve on the intake manifold between the turbine and the engine to be partially closed by a power control unit, thereby preventing the gas released from the air tank from impacting the turbine; when the difference between the required air intake volume and the actual air intake volume is less than or equal to the supplementary air volume, that is, when the air supply to the engine is sufficient, the power control unit controls the solenoid valve to be closed, thereby exiting the state of air supply through the air tank.

[0124] The embodiment of the present invention can divide the power control unit or main control device of the vehicle into functional modules according to the above method example. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing unit. The above integrated unit can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present invention is schematic and is only a logical functional division. There may be other division methods in actual implementation.

[0125] Figure 5This is a schematic diagram of the structure of a vehicle starting control device provided in an embodiment of the present application. Figure 5 As shown, the vehicle starting control device includes: a detection module 510, an acquisition module 520, and an air supply module 530;

[0126] A detection module 510, used to detect the vehicle status;

[0127] The acquisition module 520 is used to acquire the maximum available torque of the engine, the actual torque of the engine and the reference torque if the vehicle state is that the vehicle is in the starting stage and the clutch is in the engagement stage, and the starting stage is the stage from the driver pressing the accelerator to the first gear shift;

[0128] The air supply module 530 is used to control the solenoid valve between the air tank and the engine to open through the vehicle's power control unit so that the air tank supplies gas to the engine if the difference between the maximum available torque and the actual torque is less than or equal to a first preset threshold, and the ratio of the actual torque to the reference torque is less than or equal to a second preset threshold, and the air tank pressure is greater than or equal to the safety pressure required for braking.

[0129] In one possible design, the device further includes: a closing module;

[0130] The closing module is used to control the partial closing of the butterfly valve on the intake manifold between the turbine and the engine through the power control unit.

[0131] In one possible design, the device further includes: a gas volume acquisition module and an exit module;

[0132] The air volume acquisition module is used to obtain the required air volume, actual air volume and supplementary air volume;

[0133] The exit module is used to control the solenoid valve to close and the butterfly valve on the intake manifold to open through the power control unit if the difference between the required intake volume and the actual intake volume is less than or equal to the supplementary air volume.

[0134] In a possible design, the gas volume acquisition module includes: a parameter acquisition module and a calculation module;

[0135] The parameter acquisition module is used to obtain the number of cylinders of the engine, the external characteristic torque at the current speed of the engine, the requested torque, the current speed, and the fuel efficiency coefficient;

[0136] The calculation module is used to calculate the air supply amount according to the number of cylinders of the engine, the external characteristic torque at the current speed calibrated by the engine, the requested torque, the current speed, and the fuel efficiency coefficient.

[0137] In a possible design, the calculation module is further used to calculate the supplementary gas volume by the following formula:

[0138]

[0139] Among them, m air_extra is the amount of air supply, n is the number of cylinders in the engine, λ is the excess air coefficient, t ormax is the external characteristic torque at the current speed of the engine, A is the requested torque issued by the gearbox to the engine, R is the ideal gas constant, T is the thermodynamic temperature of the gas, P is the pressure of the gas, M is the molar mass of the air, and n Eng_Speed is the current speed of the engine, η feul is the fuel efficiency factor.

[0140] In one possible design, the detection module 510 includes: an acquisition type module and a state detection module;

[0141] Get type module, used to get the type of engine;

[0142] The state detection module is used to detect the vehicle state if the engine type is a turbocharged engine.

[0143] A vehicle starting control device provided in this embodiment can execute a vehicle starting control method of the above embodiment, and its implementation principle and technical effect are similar, which will not be described in detail in this embodiment.

[0144] In a specific implementation of the aforementioned vehicle starting control device, each module may be implemented as a processor, and the processor may execute computer-executable instructions stored in a memory, so that the processor executes the aforementioned vehicle starting control method.

[0145] Figure 6 This is a schematic diagram of the structure of the power control unit of a vehicle provided in an embodiment of the present application. Figure 6 As shown, the power control unit of the vehicle includes: at least one processor 610 and a memory 620. The power control unit of the vehicle also includes a communication component 630. The processor 610, the memory 620 and the communication component 630 are connected via a bus 640.

[0146] In a specific implementation process, at least one processor 610 executes the computer-executable instructions stored in the memory 620, so that at least one processor 610 executes a vehicle starting control method executed by the power control unit side of the vehicle as described above.

[0147] The specific implementation process of the processor 610 can be found in the above method embodiment, and its implementation principle and technical effect are similar, so this embodiment will not be repeated here.

[0148] In the above embodiments, it should be understood that the processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. A general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in the invention may be directly implemented as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0149] The memory may include a high-speed RAM memory, and may also include a non-volatile storage NVM, such as at least one disk storage.

[0150] The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the bus in the drawings of the present application is not limited to only one bus or one type of bus.

[0151] The above-mentioned functions implemented by the power control unit and the main control device of the vehicle introduce the solution provided by the embodiment of the present invention. It can be understood that in order to realize the above-mentioned functions, the power control unit or the main control device of the vehicle includes hardware structures and / or software modules corresponding to the execution of each function. In combination with the units and algorithm steps of each example described in the embodiment disclosed in the embodiment of the present invention, the embodiment of the present invention can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the technical solution of the embodiment of the present invention.

[0152] The present application also provides a computer-readable storage medium, in which computer-executable instructions are stored. When a processor executes the computer-executable instructions, it is used to implement the above vehicle starting control method.

[0153] The above-mentioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. The readable storage medium can be any available medium that can be accessed by a general or special-purpose computer.

[0154] An exemplary readable storage medium is coupled to a processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (Application Specific Integrated Circuits, referred to as: ASIC). Of course, the processor and the readable storage medium can also exist as discrete components in the power control unit or main control device of the vehicle.

[0155] The present application also provides a computer program product, which includes a computer program. The computer program is stored in a readable storage medium. At least one processor of a power control unit of a vehicle can read the computer program from the readable storage medium. At least one processor executes the computer program so that the power control unit of the vehicle executes the solution provided in any of the above embodiments.

[0156] Those skilled in the art can understand that all or part of the steps of the above method embodiments can be completed by hardware related to program instructions. The above program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above method embodiments are executed; and the above storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0157] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments, and the above embodiments are only used to illustrate the technical solution of the present application rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A vehicle starting control method, It is characterized in that include: Detect vehicle status; If the vehicle state is that the vehicle is in the starting stage and the clutch is in the engagement stage, the maximum available torque of the engine, the actual torque of the engine and the reference torque are obtained, and the starting stage is the stage from when the driver steps on the accelerator to when the first gear is shifted; If the difference between the maximum available torque and the actual torque is less than or equal to a first preset threshold, and the ratio of the actual torque to the reference torque is less than or equal to a second preset threshold, and the air tank pressure is greater than or equal to the safety pressure required for braking, the solenoid valve between the air tank and the engine is controlled to open by the vehicle's power control unit so that the air tank provides gas to the engine.

2. The method according to claim 1, It is characterized in that After the solenoid valve between the gas tank and the engine is opened, it also includes: The butterfly valve on the intake manifold between the turbine and the engine is partially closed by controlling the power control unit.

3. The method according to claim 1 or 2, It is characterized in that Also includes: Obtain required air intake, actual air intake and air supplement; If the difference between the required intake air volume and the actual intake air volume is less than or equal to the supplementary air volume, the solenoid valve is controlled to be closed and the butterfly valve on the intake manifold is controlled to be opened through the power control unit.

4. The method according to claim 3, It is characterized in that The process of obtaining the gas supplement amount includes: Obtaining the number of cylinders of the engine, the external characteristic torque at the current speed calibrated by the engine, the requested torque, the current speed, and the fuel efficiency coefficient; The supplementary air amount is calculated according to the number of cylinders of the engine, the external characteristic torque at the current speed calibrated by the engine, the requested torque, the current speed, and the fuel efficiency coefficient.

5. The method according to claim 4, It is characterized in that The calculating of the air supply amount according to the number of cylinders of the engine, the external characteristic torque at the current speed calibrated by the engine, the requested torque, the current speed, and the fuel efficiency coefficient includes: The gas supplement volume is calculated by the following formula: Among them, m air_extra is the amount of supplementary air, n is the number of cylinders of the engine, λ is the excess air coefficient, t ormax is the external characteristic torque at the current speed of the engine, A is the requested torque issued by the gearbox to the engine, R is the ideal gas constant, T is the thermodynamic temperature of the gas, P is the pressure of the gas, M is the molar mass of the air, and n Eng_Speed is the current speed of the engine, η feul is the fuel efficiency factor.

6. The method according to claim 1 or 2, It is characterized in that The detecting of the vehicle state comprises: Get the type of the engine; If the type of the engine is a turbocharged engine, the vehicle state is detected.

7. A vehicle air intake system, It is characterized in that include: Gas tank, turbine, engine, power control unit; Wherein, the gas storage tank is connected to the engine via a pipeline, and a solenoid valve is provided on the pipeline; The turbine and the engine are connected via an intake manifold, and a butterfly valve is provided on the intake manifold; The power control unit is communicatively connected to the solenoid valve and the butterfly valve.

8. The system according to claim 7, It is characterized in that The gas storage tank and the original gas tank of the vehicle are connected to an air compressor via a four-way valve, and the original gas tank of the vehicle is connected to a brake system.

9. A vehicle starting control device, It is characterized in that include: A detection module, used for detecting the vehicle status; an acquisition module, configured to acquire the maximum available torque of the engine, the actual torque of the engine, and the reference torque of the engine if the vehicle state is that the vehicle is in a starting stage and the clutch is in an engagement stage, wherein the starting stage is a stage from when the driver steps on the accelerator to when the first gear shift is made; The air supply module is used to control the solenoid valve between the air tank and the engine to open through the vehicle's power control unit so that the air tank supplies gas to the engine if the difference between the maximum available torque and the actual torque is less than or equal to a first preset threshold, and the ratio of the actual torque to the reference torque is less than or equal to a second preset threshold, and the air tank pressure is greater than or equal to the safety pressure required for braking.

10. A power control unit of a vehicle, It is characterized in that include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the vehicle starting control method according to any one of claims 1 to 6.

11. A computer-readable storage medium, It is characterized in that The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the vehicle starting control method according to any one of claims 1 to 6.

12. A computer program product comprising a computer program, It is characterized in that When the computer program is executed by a processor, the vehicle starting control method according to any one of claims 1 to 6 is implemented.

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