Control system and method for preventing catalyst ablation of hybrid vehicle model

Abstract

The invention discloses a control system and method for preventing a hybrid vehicle type catalyst from being ablated, and belongs to the technical field of hybrid electric vehicles, and the method comprises the steps that S1, a vehicle control unit (VCU) inputs an instruction for requesting to start an engine to an electronic control unit (ECU); the fuel oil liquid level sensor inputs a fuel oil liquid level signal to the instrument controller; the instrument controller inputs a fuel oil liquid level signal to an electronic control unit (ECU); s2, an electronic control unit (ECU) judges whether the percentage of the fuel oil liquid level signal is larger than a preset value or not, if not, the step S3 is executed, and if yes, the step S4 is executed; s3, the electronic control unit (ECU) forbids starting of the engine, and the step S5 is executed; and S4, the electronic control unit (ECU) allows the engine to be started, the step S5 is executed, and the step S5 is finished. By means of the control system and method for preventing the hybrid power vehicle type catalyst from being ablated, the hybrid power vehicle type catalyst can be prevented from being ablated.

Description

Technical Field

[0001] The present invention belongs to the technical field of hybrid electric vehicles, and in particular, relates to a control system and a method for preventing catalyst ablation of a hybrid electric vehicle. Background Art

[0002] Nowadays, hybrid models on the market are becoming more and more popular among users. Hybrid models can not only allow users to experience the driving pleasure of electric vehicles, but also solve the user's range anxiety problem. Hybrid models have both traditional internal combustion engines and electric motors as power sources, which requires control strategies to perfectly integrate the power sources.

[0003] When the fuel level is low and the engine is started, the air-fuel ratio is too lean, resulting in incomplete combustion, which further causes part of the oil and gas to be discharged to the catalyst through the engine exhaust, causing catalyst ablation.

[0004] Patent CN115875150B discloses an engine combustion method, an engine combustion system, an engine and a vehicle, the engine combustion method comprising: during the full operating process of the engine, a first fuel and a second fuel are injected into a combustion chamber of the engine; the first fuel injection start time is before the second fuel injection start time; the first fuel injection end time is before the second fuel injection start time, the first fuel injection end time is equal to the second fuel injection end time, or the first fuel injection end time is between the second fuel injection start time and the second fuel injection end time; the first fuel injection times between the first fuel injection start time and the first fuel injection end time are one or more times; the second fuel injection times between the second fuel injection start time and the second fuel injection end time are one or more times.

[0005] However, the technology disclosed in the above patent cannot prevent catalyst ablation in hybrid vehicles. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a control system and method for preventing catalyst ablation of a hybrid vehicle model in view of the deficiencies in the prior art, so as to achieve the purpose of preventing catalyst ablation of a hybrid vehicle model.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] The present invention provides a control system for preventing catalyst ablation of a hybrid vehicle, comprising a fuel level sensor, an instrument controller, a vehicle control unit (VCU) and an electronic control unit (ECU), wherein the output end of the fuel level sensor is connected to the input end of the instrument controller; the output end of the instrument controller is connected to the input end of the electronic control unit (ECU); and the output end of the vehicle control unit (VCU) is connected to the input end of the electronic control unit (ECU).

[0009] Furthermore, the vehicle controller (VCU) inputs a command requesting to start the engine to the electronic control unit (ECU).

[0010] Further, the fuel level sensor inputs a fuel level signal to the instrument controller.

[0011] Further, the meter controller inputs a fuel level signal to an electronic control unit (ECU).

[0012] Further, the electronic control unit (ECU) determines whether the percentage of the fuel level signal is greater than a preset value.

[0013] Further, when the electronic control unit (ECU) determines that the percentage of the fuel level signal is not greater than a preset value, the electronic control unit (ECU) prohibits starting the engine.

[0014] Further, when the electronic control unit (ECU) determines that the percentage of the fuel level signal is greater than a preset value, the electronic control unit (ECU) allows the engine to be started.

[0015] Further, the preset value is 0%.

[0016] The present invention also provides a control method for preventing catalyst ablation of a hybrid vehicle, the method comprising the following steps:

[0017] S1: The vehicle control unit (VCU) inputs a command requesting to start the engine to the electronic control unit (ECU); the fuel level sensor inputs a fuel level signal to the instrument controller; the instrument controller inputs a fuel level signal to the electronic control unit (ECU);

[0018] S2: The electronic control unit (ECU) determines whether the percentage of the fuel level signal is greater than a preset value. If not, it enters S3; if so, it enters S4;

[0019] S3: The electronic control unit (ECU) prohibits starting the engine and enters S5;

[0020] S4: The electronic control unit (ECU) allows the engine to start and enters S5;

[0021] S5: End.

[0022] The control system and method of the present invention have the following advantages:

[0023] (1) The control system and method of the present invention can prevent catalyst ablation in a hybrid vehicle.

[0024] (2) In the present invention, the electronic control unit (ECU) is added to judge the fuel level signal, and can decide whether to control the start of the engine according to the judgment result. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] This specification includes the following drawings, which show the following contents:

[0026] Figure 1 It is a logical structure block diagram of a control system for preventing catalyst ablation of a hybrid vehicle according to the present invention;

[0027] Figure 2 The present invention is a flowchart of a control method for preventing catalyst ablation of a hybrid vehicle.

[0028] Explanation of the reference numerals: 1. Fuel level sensor; 2. Instrument controller; 3. Vehicle controller unit (VCU); 4. Electronic control unit (ECU). DETAILED DESCRIPTION

[0029] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and facilitating their implementation.

[0030] Figure 1 It is a logical structure block diagram of a control system for preventing catalyst ablation of a hybrid vehicle of the present invention, including a fuel level sensor 1, an instrument controller 2, a vehicle controller (VCU) 3 and an electronic control unit (ECU) 4, wherein the output end of the fuel level sensor 1 is connected to the input end of the instrument controller 2; the output end of the instrument controller 2 is connected to the input end of the electronic control unit (ECU) 4; the output end of the vehicle controller (VCU) 3 is connected to the input end of the electronic control unit (ECU) 4.

[0031] Among them, the fuel level sensor 1 transmits signals to the instrument controller 2; the instrument controller 2 transmits signals to the electronic control unit (ECU) 4; the vehicle controller (VCU) 3 interacts with the electronic control unit (ECU) 4. The vehicle controller (VCU) inputs a command requesting to start the engine to the electronic control unit (ECU). Specifically, the vehicle controller (VCU) 3 inputs a command requesting to start the engine to the electronic control unit (ECU) 4; the fuel level sensor 1 inputs a fuel level signal to the instrument controller 2; the instrument controller 2 inputs a fuel level signal to the electronic control unit (ECU) 4.

[0032] Combine the following Figure 1 The working principle of the control system of the present invention is introduced as follows:

[0033] When the driver has a need to start the engine and starts the engine, the vehicle control unit (VCU) 3 inputs the command requesting to start the engine to the electronic control unit (ECU) 4, and at the same time, the fuel level sensor 1 inputs the fuel level signal to the instrument controller 2, and the instrument controller 2 inputs the fuel level signal to the electronic control unit (ECU) 4. After receiving the command requesting to start the engine input by the vehicle control unit (VCU) 3, the electronic control unit (ECU) 4 will not directly control the start of the engine, but the electronic control unit (ECU) 4 will determine whether the percentage of the fuel level signal is greater than the preset value, that is, the electronic control unit (ECU) will first determine whether the percentage of the fuel level signal input by the instrument controller 2 is greater than the preset value. When the electronic control unit (ECU) 4 determines that the percentage of the fuel level signal is not greater than the preset value, the electronic control unit (ECU) 4 prohibits starting the engine, that is, when the electronic control unit (ECU) 4 determines that the percentage of the fuel level signal input by the instrument controller 2 is not greater than the preset value, the electronic control unit (ECU) 4 will control to prohibit starting the engine, thereby avoiding part of the oil and gas caused by starting the engine when the percentage of the fuel level signal is lower than the preset value from being discharged to the catalyst through the engine exhaust, thereby preventing the catalyst of the hybrid vehicle from being burned; when the electronic control unit (ECU) 4 determines that the percentage of the fuel level signal is greater than the preset value, the electronic control unit (ECU) 4 allows starting the engine, that is, when the electronic control unit (ECU) 4 determines that the percentage of the fuel level signal input by the instrument controller 2 is greater than the preset value, the electronic control unit (ECU) 4 will control to allow starting the engine. That is, it can be determined by the electronic control unit (ECU) 4 judging the fuel level signal whether to control starting the engine.

[0034] Figure 2 The present invention is a flowchart of a control method for preventing catalyst ablation of a hybrid vehicle, the method comprising the following steps:

[0035] S1: The vehicle control unit (VCU) 3 inputs the command requesting to start the engine to the electronic control unit (ECU) 4; the fuel level sensor 1 inputs the fuel level signal to the instrument controller 2; the instrument controller 2 inputs the fuel level signal to the electronic control unit (ECU) 4. Figure 2 S1 in.

[0036] S2: The electronic control unit (ECU) 4 determines whether the percentage of the fuel level signal is greater than a preset value. If not, it enters S3. If yes, it enters S4. Figure 2 S2 in the figure, specifically, when the vehicle control unit (VCU) 3 inputs an instruction requesting to start the engine to the electronic control unit (ECU) 4, the electronic control unit (ECU) 4 will not directly control the start of the engine, but will first determine whether the percentage of the fuel level signal input by the instrument controller 2 is greater than the preset value. If the electronic control unit (ECU) 4 determines that the percentage of the fuel level signal input by the instrument controller 2 is not greater than the preset value, it enters S3. If the electronic control unit (ECU) 4 determines that the percentage of the fuel level signal input by the instrument controller 2 is greater than the preset value, it enters S4.

[0037] S3: The electronic control unit (ECU) 4 prohibits starting the engine and enters S5. Figure 2 In S3, specifically, when the electronic control unit (ECU) 4 determines that the percentage of the fuel level signal input by the meter controller 2 is not greater than a preset value, the electronic control unit (ECU) 4 will control to prohibit starting the engine.

[0038] S4: The electronic control unit (ECU) 4 allows the engine to start and enters S5; that is, the corresponding Figure 2 In S4, specifically, when the electronic control unit (ECU) 4 determines that the percentage of the fuel level signal input by the meter controller 2 is greater than a preset value, the electronic control unit (ECU) 4 will control to allow the engine to be started.

[0039] S5: End. Figure 2 S1 in.

[0040] In addition, in this specific implementation, the preset value is 0%, but the preset value is not limited to 0% and can be specifically adjusted according to specific circumstances.

[0041] Functions and Effects of the Embodiments

[0042] The vehicle control unit (VCU) 3 inputs the command requesting to start the engine to the electronic control unit (ECU) 4, and at the same time, the fuel level sensor 1 inputs the fuel level signal to the instrument controller 2, and the instrument controller 2 inputs the fuel level signal to the electronic control unit (ECU) 4. After receiving the command requesting to start the engine input by the vehicle control unit (VCU) 3, the electronic control unit (ECU) 4 will not directly control the start of the engine, but the electronic control unit (ECU) 4 will determine whether the percentage of the fuel level signal is greater than the preset value, that is, the electronic control unit (ECU) will first determine whether the percentage of the fuel level signal input by the instrument controller 2 is greater than the preset value. When the electronic control unit (ECU) 4 determines that the percentage of the fuel level signal is not greater than the preset value, the electronic control unit (ECU) 4 prohibits starting the engine, that is, when the electronic control unit (ECU) 4 determines that the percentage of the fuel level signal input by the instrument controller 2 is not greater than the preset value, the electronic control unit (ECU) 4 will control to prohibit starting the engine, thereby avoiding part of the oil and gas caused by starting the engine when the percentage of the fuel level signal is lower than the preset value from being discharged to the catalyst through the engine exhaust, thereby preventing the catalyst of the hybrid vehicle from being burned; when the electronic control unit (ECU) 4 determines that the percentage of the fuel level signal is greater than the preset value, the electronic control unit (ECU) 4 allows starting the engine, that is, when the electronic control unit (ECU) 4 determines that the percentage of the fuel level signal input by the instrument controller 2 is greater than the preset value, the electronic control unit (ECU) 4 will control to allow starting the engine. That is, it can be determined by the electronic control unit (ECU) 4 judging the fuel level signal whether to control starting the engine.

[0043] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A control system for preventing catalyst ablation in a hybrid vehicle, characterized in that: It includes a fuel level sensor, an instrument controller, a vehicle control unit (VCU) and an electronic control unit (ECU). The output end of the fuel level sensor is connected to the input end of the instrument controller; the output end of the instrument controller is connected to the input end of the electronic control unit (ECU); the output end of the vehicle control unit (VCU) is connected to the input end of the electronic control unit (ECU).

2. A control system for preventing catalyst ablation in a hybrid vehicle according to claim 1, characterized in that: The vehicle controller (VCU) inputs a command requesting to start the engine to the electronic control unit (ECU).

3. A control system for preventing catalyst ablation in a hybrid vehicle according to claim 1, characterized in that: The fuel level sensor inputs a fuel level signal to the instrument controller.

4. A control system for preventing catalyst ablation in a hybrid vehicle according to claim 3, characterized in that: The meter controller inputs a fuel level signal to the electronic control unit (ECU).

5. A control system for preventing catalyst ablation in a hybrid vehicle according to claim 4, characterized in that: The electronic control unit (ECU) determines whether the percentage of the fuel level signal is greater than a preset value.

6. A control system for preventing catalyst ablation in a hybrid vehicle according to claim 5, characterized in that: When the electronic control unit (ECU) determines that the percentage of the fuel level signal is not greater than a preset value, the electronic control unit (ECU) prohibits starting the engine.

7. A control system for preventing catalyst ablation in a hybrid vehicle according to claim 5, characterized in that: When the electronic control unit (ECU) determines that the percentage of the fuel level signal is greater than a preset value, the electronic control unit (ECU) allows the engine to be started.

8. A control system for preventing catalyst ablation in a hybrid vehicle according to any one of claims 5 to 7, characterized in that: The preset value is 0%.

9. A control method for preventing catalyst ablation of a hybrid vehicle according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: S1: The vehicle control unit (VCU) inputs a command requesting to start the engine to the electronic control unit (ECU); the fuel level sensor inputs a fuel level signal to the instrument controller; the instrument controller inputs a fuel level signal to the electronic control unit (ECU); S2: The electronic control unit (ECU) determines whether the percentage of the fuel level signal is greater than a preset value. If not, it enters S3; if so, it enters S4; S3: The electronic control unit (ECU) prohibits starting the engine and enters S5; S4: The electronic control unit (ECU) allows the engine to start and enters S5; S5: End.

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