Control system for preventing catalyst ablation of hybrid vehicle model
By introducing a fuel level sensor and an electronic control unit control system into hybrid vehicles, the fuel level signal is judged to determine engine start, solving the problem of catalyst ablation in hybrid vehicles and achieving reliable engine start and catalyst protection.
Patent Information
- Application Number
- CN202423070191.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-12-12
AI Technical Summary
Existing technologies are unable to effectively prevent catalyst ablation in hybrid vehicles, especially when the fuel level is low and the air-fuel ratio is too lean, resulting in incomplete combustion and catalyst ablation.
The control system consists of a fuel level sensor, an instrument controller, a vehicle controller and an electronic control unit. The electronic control unit determines whether the fuel level signal is greater than a preset value and decides whether to allow the engine to start, preventing oil vapor from being discharged onto the catalyst when the fuel is insufficient.
It effectively prevents the catalyst ablation of hybrid vehicles, avoids catalyst damage caused by insufficient fuel, and improves the reliability of engine starting.
Smart Images
Figure CN223330657U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of hybrid electric vehicles, and in particular relates to a control system for preventing catalyst ablation of a hybrid electric vehicle. Background Art
[0002] Hybrid vehicles are increasingly popular on the market, offering users the thrill of electric driving while alleviating range anxiety. Hybrid vehicles utilize both traditional internal combustion engines and electric motors as power sources, requiring control strategies to seamlessly integrate these 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 some 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, injecting a first fuel and a second fuel into a combustion chamber of the engine; the first fuel start injection time is before the second fuel start injection time; the first fuel end injection time is before the second fuel start injection time, the first fuel end injection time is equal to the second fuel end injection time, or the first fuel end injection time is between the second fuel start injection time and the second fuel end injection time; the number of first fuel injections between the first fuel start injection time and the first fuel end injection time is one or more; the number of second fuel injections between the second fuel start injection time and the second fuel end injection time is one or more.
[0005] However, the technology disclosed in the above patent cannot prevent catalyst ablation in hybrid vehicles. Utility Model Content
[0006] The technical problem to be solved by the present invention is to provide a control system for preventing catalyst ablation of hybrid vehicle models in view of the deficiencies of the existing technology, so as to achieve the purpose of preventing catalyst ablation of hybrid vehicle models.
[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0008] The utility model provides a control system for preventing catalyst ablation of a hybrid vehicle, comprising a fuel level sensor, an instrument controller, a vehicle controller (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 controller (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] Furthermore, the fuel level sensor inputs a fuel level signal to the instrument controller.
[0011] Furthermore, the meter controller inputs a fuel level signal to an electronic control unit (ECU).
[0012] Furthermore, the electronic control unit (ECU) determines whether the percentage of the fuel level signal is greater than a preset value.
[0013] Furthermore, 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] Furthermore, 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 control system of this utility model has the following advantages:
[0017] (1) The control system of the present invention can prevent catalyst ablation in hybrid vehicles.
[0018] (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 based on the judgment result. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] This manual includes the following drawings, which show the following contents:
[0020] Figure 1 This is a logic structure block diagram of a control system for preventing catalyst ablation in a hybrid vehicle according to the present invention.
[0021] Explanation of reference numerals: 1. Fuel level sensor; 2. Instrument controller; 3. Vehicle controller unit (VCU); 4. Electronic control unit (ECU). DETAILED DESCRIPTION
[0022] The following is a further detailed description of the specific implementation methods of the present invention 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 concept and technical solution of the present invention and to facilitate its implementation.
[0023] Figure 1 This is a logical structure block diagram of a control system for preventing catalyst ablation in a hybrid vehicle model according to the present invention, which includes a fuel level sensor 1, an instrument controller 2, a vehicle controller (VCU) 3 and an electronic control unit (ECU) 4. 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; and the output end of the vehicle controller (VCU) 3 is connected to the input end of the electronic control unit (ECU) 4.
[0024] 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; and the vehicle control unit (VCU) 3 exchanges signals with the electronic control unit (ECU) 4. The vehicle control unit (VCU) inputs a command requesting the engine start to the electronic control unit (ECU). Specifically, the vehicle control unit (VCU) 3 inputs the command requesting the engine start to the electronic control unit (ECU) 4; the fuel level sensor 1 inputs a fuel level signal to the instrument controller 2; and the instrument controller 2 inputs a fuel level signal to the electronic control unit (ECU) 4.
[0025] The following combination Figure 1 The working principle of the control system of this utility model is as follows:
[0026] When the driver requests to start the engine and starts it, the vehicle control unit (VCU) 3 inputs a command requesting the engine start to the electronic control unit (ECU) 4. Simultaneously, the fuel level sensor 1 inputs a fuel level signal to the instrument controller 2, and the instrument controller 2 inputs a fuel level signal to the electronic control unit (ECU) 4. Upon receiving the engine start command from the vehicle control unit (VCU) 3, the electronic control unit (ECU) 4 does not directly control the engine start. Instead, the electronic control unit (ECU) 4 determines whether the percentage of the fuel level signal is greater than a preset value. That is, the electronic control unit (ECU) first determines whether the percentage of the fuel level signal input from the instrument controller 2 is greater than a preset value. When the electronic control unit (ECU) 4 determines that the percentage of the fuel level signal is not greater than a 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 meter controller 2 is not greater than the preset value, the electronic control unit (ECU) 4 controls to prohibit starting the engine, thereby preventing some fuel vapor from being discharged into the catalyst through the engine exhaust when the engine is started when the percentage of the fuel level signal is lower than the preset value, thereby preventing catalyst ablation in hybrid vehicles. 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 meter controller 2 is greater than the preset value, the electronic control unit (ECU) 4 controls to allow starting the engine. In other words, the electronic control unit (ECU) 4 can determine whether to control starting the engine based on its determination of the fuel level signal.
[0027] In addition, in this specific implementation, the preset value is 0%, but the preset value is not limited to 0% and can be adjusted according to specific circumstances.
[0028] Functions and Effects of the Embodiments
[0029] Vehicle control unit (VCU) 3 inputs an engine start request to electronic control unit (ECU) 4. Simultaneously, fuel level sensor 1 inputs a fuel level signal to instrument controller 2, and instrument controller 2 inputs a fuel level signal to electronic control unit (ECU) 4. Upon receiving the engine start request from VCU 3, ECU 4 does not directly start the engine. Instead, ECU 4 determines whether the percentage of the fuel level signal is greater than a preset value. Specifically, the ECU first determines whether the percentage of the fuel level signal input from instrument controller 2 is greater than a preset value. When the electronic control unit (ECU) 4 determines that the percentage of the fuel level signal is not greater than a 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 meter controller 2 is not greater than the preset value, the electronic control unit (ECU) 4 controls to prohibit starting the engine, thereby preventing some fuel vapor from being discharged into the catalyst through the engine exhaust when the engine is started when the percentage of the fuel level signal is lower than the preset value, thereby preventing catalyst ablation in hybrid vehicles. 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 meter controller 2 is greater than the preset value, the electronic control unit (ECU) 4 controls to allow starting the engine. In other words, the electronic control unit (ECU) 4 can determine whether to control starting the engine based on its determination of the fuel level signal.
[0030] The above description of the present invention is provided as an example, in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described method. Any non-substantial improvements made using the method concepts and technical solutions of the present invention, or any application of the above-described concepts and technical solutions of the present invention to other situations without modification, are all within the scope of protection of the present invention.
Claims
1. A control system for preventing catalyst ablation in a hybrid vehicle, characterized by: It includes a fuel level sensor, an instrument controller, a vehicle controller (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); and the output end of the vehicle controller (VCU) is connected to the input end of the electronic control unit (ECU).
2. The 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. The 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. The 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. The 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. The 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. The 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%.