Method and device for determining maintenance data of engine of hybrid vehicle and hybrid vehicle

Abstract

The embodiment of the invention discloses a hybrid vehicle engine maintenance data determination method and device and a hybrid vehicle. The determination method comprises the steps that actual working parameters of an engine in the hybrid vehicle are obtained through an engine controller; determining the actual total work amount of the engine within the set time based on the actual working parameters; the theoretical required maintenance mileage of the engine is obtained, and the theoretical total fuel quantity of the engine within the set time is determined based on the theoretical required maintenance mileage; converting the theoretical total fuel quantity into theoretical total power consumption by using a fuel-energy consumption conversion relation; and determining maintenance data of the engine by using the actual total work amount and the theoretical total power consumption amount. According to the method, the theoretical total fuel quantity determined by utilizing the theoretical mileage to be maintained is converted into the theoretical total power consumption, and the maintenance data of the engine is determined by combining the actual work amount of the engine, so that the technical problem that the maintenance time of the engine is determined only according to the total mileage of the vehicle, and excessive maintenance is easily caused is solved.

Description

Technical Field

[0001] This invention relates to the field of hybrid vehicle control technology, and more particularly to a method, apparatus, and hybrid vehicle for determining engine maintenance data of a hybrid vehicle. Background Technology

[0002] For traditional cars, i.e., non-hybrid vehicles driven solely by the engine, where the engine powers the vehicle the entire time, the lifespan of engine oil is generally determined by the vehicle's mileage. Specific criteria for this determination include... Figure 1 As shown. For example: mineral oil engine oil needs to be changed every 5,000 kilometers, semi-synthetic engine oil needs to be changed every 7,500 kilometers, and fully synthetic engine oil needs to be changed at 10,000 kilometers, etc.

[0003] However, for new energy vehicles, including plug-in hybrids / range-extended vehicles, they can be driven by either electricity provided by the power battery or directly by the engine. The power battery's electrical energy comes from external charging stations or generation by the range extender, such as... Figure 2 As shown, the engine is not continuously running during vehicle operation. The actual mileage traveled is not correlated with engine operation, nor is the total mileage directly correlated with the engine reaching the point of oil deterioration. Therefore, for new energy vehicles, total mileage and maintenance needs are not related. Using total mileage to determine engine maintenance intervals would lead to over-maintenance and waste. Summary of the Invention

[0004] This invention provides a method, device, and hybrid vehicle for determining engine maintenance data for hybrid vehicles, solving the technical problem of over-maintenance that occurs when determining engine maintenance time solely based on total vehicle mileage for new energy vehicles.

[0005] In a first aspect, embodiments of the present invention provide a method for determining maintenance data of a hybrid vehicle engine, the method comprising:

[0006] The actual operating parameters of the engine in the hybrid vehicle are obtained through the engine controller;

[0007] The actual total power output of the engine within a set time period is determined based on the actual working parameters, wherein the set time is the time elapsed since the last maintenance of the engine of the hybrid vehicle was completed.

[0008] Obtain the theoretical maintenance mileage of the engine, and determine the theoretical total fuel consumption of the engine based on the theoretical maintenance mileage;

[0009] The theoretical total fuel consumption is converted into the theoretical total electricity consumption using the fuel-energy consumption conversion relationship;

[0010] The maintenance data of the engine is determined by using the actual total work done and the theoretical total power consumption.

[0011] Secondly, embodiments of the present invention also provide a device for determining maintenance data of a hybrid vehicle engine, the device comprising:

[0012] The parameter acquisition unit is used to acquire the actual operating parameters of the engine in the hybrid vehicle through the engine controller;

[0013] An energy determination unit is used to determine the actual total work done by the engine within a set time period based on the actual operating parameters, wherein the set time is the time elapsed since the last maintenance of the engine of the hybrid vehicle was completed.

[0014] A fuel quantity acquisition unit is used to acquire the theoretical maintenance mileage of the engine and determine the theoretical total fuel quantity of the engine based on the theoretical maintenance mileage.

[0015] The power consumption determination unit is used to convert the theoretical total fuel quantity into the theoretical total power consumption using the fuel-energy consumption conversion relationship;

[0016] The maintenance data determination unit is used to determine the maintenance data of the engine using the actual total power output and the theoretical total power consumption.

[0017] Thirdly, embodiments of the present invention also provide a hybrid vehicle, the hybrid vehicle including an engine controller and a vehicle controller; the vehicle controller is used to execute the method for determining engine maintenance data of the hybrid vehicle described in the first aspect above.

[0018] This invention discloses a method, apparatus, and hybrid vehicle for determining engine maintenance data in hybrid vehicles. The method includes: acquiring the actual operating parameters of the engine in the hybrid vehicle through an engine controller; determining the actual total power output of the engine within a set time period based on the actual operating parameters; acquiring the theoretical maintenance mileage of the engine and determining the theoretical total fuel consumption of the engine within the set time period based on the theoretical maintenance mileage; converting the theoretical total fuel consumption into theoretical total electricity consumption using a fuel-energy consumption conversion relationship; and determining the engine maintenance data using the actual total power output and the theoretical total electricity consumption. This invention solves the technical problem of over-maintenance in new energy vehicles where engine maintenance time is determined solely based on total vehicle mileage. By converting the theoretical total fuel consumption determined using the theoretical maintenance mileage into theoretical total electricity consumption and then combining it with the engine's actual power output to determine engine maintenance data, this invention achieves the technical effect of determining maintenance timing based on the actual wear of the engine. This avoids both over-maintenance and damage to the engine due to untimely maintenance. Attached Figure Description

[0019] Figure 1 This is a diagram illustrating how traditional automobiles define engine maintenance intervals.

[0020] Figure 2 This is a diagram illustrating how existing hybrid vehicles define engine maintenance intervals.

[0021] Figure 3 This is a flowchart of a method for determining engine maintenance data for a hybrid vehicle provided in an embodiment of the present invention;

[0022] Figure 4 This is a flowchart of another method for determining engine maintenance data for hybrid vehicles provided in an embodiment of the present invention;

[0023] Figure 5 This is a structural diagram of a device for determining engine maintenance data of a hybrid vehicle provided in an embodiment of the present invention. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0025] It should be noted that the various embodiments of the present invention described below can be executed individually or in combination with each other, and the embodiments of the present invention do not impose specific limitations in this regard.

[0026] Figure 3 This is a flowchart illustrating a method for determining engine maintenance data in a hybrid vehicle, as provided in an embodiment of the present invention. Figure 3 As shown, the method for determining the engine maintenance data of this hybrid vehicle specifically includes the following steps:

[0027] S101 obtains the actual operating parameters of the engine in the hybrid vehicle through the engine controller.

[0028] Specifically, the Engine Management System (EMS) is the control unit for engine operation. It has control software and can exchange information with the vehicle controller via CAN communication. The vehicle controller first obtains the engine operating status of the hybrid vehicle through the engine controller to determine whether the engine is working. If the result is yes, it further obtains the actual operating parameters of the engine through the engine controller, such as the engine intake air volume, fuel injection volume, and speed.

[0029] S102, determine the actual total power output of the engine within a set time period based on actual working parameters, where the set time is the time elapsed since the last maintenance of the hybrid vehicle's engine.

[0030] Specifically, the vehicle controller will acquire the actual working parameters of the engine at preset intervals, calculate the amount of work done in each preset interval, and then add them together to obtain the actual total amount of work done within the set time. The set time is usually set to the time since the last maintenance of the engine was completed.

[0031] In theory, if the preset duration is set small enough, such as at the millisecond level, the amount of work done within the preset duration can be approximated to the amount of work done at a certain moment, making the calculated actual total work more accurate. The actual total work done by the engine can then be calculated using the formula E = P * T, where E is the actual total work done by the engine, which is the cumulative value of the work done by the engine within the set time, usually in kWh, P is the amount of work done by the engine within each preset duration, usually in kW, and T is the set duration, usually in hours (h).

[0032] S103, obtain the theoretical maintenance mileage of the engine, and determine the theoretical total fuel quantity of the engine based on the theoretical maintenance mileage.

[0033] Specifically, the vehicle controller can directly obtain the engine's theoretical maintenance mileage and then calculate the engine's theoretical total fuel consumption within a set time using the engine's average fuel consumption. The engine's average fuel consumption is the average fuel consumption per 100 kilometers determined based on different driving conditions when the engine uses only fuel to power the vehicle. Specifically, the engine's theoretical maintenance mileage can be obtained as follows: During driving, the hybrid vehicle uses sensors to continuously monitor the tire rotation count and calculates the total mileage, displaying it on the instrument panel. When this total mileage reaches the theoretical maintenance mileage, the vehicle controller can directly obtain that theoretical maintenance mileage.

[0034] S104 utilizes the fuel-energy conversion relationship to convert the theoretical total fuel consumption into the theoretical total electricity consumption.

[0035] Specifically, referring to the fuel-energy consumption conversion relationship in GB / T37340-2019 "Electric Vehicle Energy Consumption Conversion Method", and based on the product parameters, the fuel-energy consumption conversion relationship is approximately: 1 kWh of electricity consumption = 0.31 L of gasoline fuel consumption. Using the above relationship, the theoretical total fuel consumption can be converted into the theoretical total electricity consumption.

[0036] S105 determines engine maintenance data using actual total power output and theoretical total power consumption.

[0037] Specifically, after obtaining the engine's actual total power output and theoretical total power consumption, the two are compared to determine the engine's maintenance data. This maintenance data can be expressed as maintenance time or other parameters, without any specific restrictions here.

[0038] This invention solves the technical problem of over-maintenance in new energy vehicles that relies solely on total vehicle mileage to determine engine maintenance time by converting the theoretical total fuel consumption determined using the theoretical required maintenance mileage into the theoretical total electricity consumption, and then combining this with the engine's actual power output. This achieves the technical effect of determining maintenance timing based on the engine's actual wear, thus avoiding both over-maintenance and damage to the engine caused by untimely maintenance.

[0039] Based on the above technical solutions, Figure 4 This is a flowchart of another method for determining engine maintenance data for hybrid vehicles provided in an embodiment of the present invention, such as... Figure 4 As shown, S105 specifically includes:

[0040] S201 determines the remaining maintenance percentage of the engine by using the actual total power output and the theoretical total power consumption; the remaining maintenance percentage is the proportion of the engine's actual working mileage corresponding to the actual total power output to the theoretical maintenance mileage.

[0041] Optionally, determining the remaining maintenance percentage of the engine using the actual total power output and the theoretical total power consumption includes: determining the remaining maintenance percentage of the engine based on the following formula: B = (Et - E) / Et; where B is the remaining maintenance percentage, E is the actual total power output, and Et is the theoretical total power consumption.

[0042] S202 determines the actual maintenance time for the engine based on the remaining maintenance percentage.

[0043] Optionally, determining the actual maintenance time of the engine based on the remaining maintenance percentage includes: determining whether the remaining maintenance percentage is less than a preset percentage threshold; if it is less, indicating that the engine currently needs maintenance; otherwise, determining the actual maintenance time of the engine based on the difference between the remaining maintenance percentage and the preset percentage threshold.

[0044] Specifically, the preset percentage threshold is usually set to 0, that is, it is determined whether B < 0. If it is true, it means that the engine needs maintenance. The user can be notified by displaying on the instrument panel or by emitting a prompt sound. If B ≥ 0, it means that the actual total power output of the engine has not reached the power output required for maintenance. In this case, the actual maintenance time of the engine can be determined based on the difference between B and the preset percentage threshold. For example, if B = 20%, the difference between B and the preset percentage threshold is 20%. 20% is used to determine the remaining power output of the engine before the next maintenance, and then the actual maintenance time of the engine is determined by the remaining power output.

[0045] Based on the above technical solutions, S102, before determining the actual total work done by the engine within a set time based on actual operating parameters, also includes:

[0046] Determine that the engine of the hybrid vehicle has reached the theoretical maintenance condition; whereby reaching the theoretical maintenance condition means that the vehicle's mileage has reached the theoretical maintenance mileage.

[0047] Specifically, for hybrid vehicles, the engine may not actually need maintenance when the theoretical maintenance conditions are met, i.e., when the mileage reaches the theoretical maintenance mileage. Therefore, to reduce unnecessary calculations, it is possible to first determine whether the hybrid vehicle's engine has reached the theoretical maintenance conditions. If it has, then the actual total power output of the engine can be determined based on this. Using the theoretical maintenance conditions as the time point to determine when the engine needs maintenance can effectively avoid the problem of over-maintenance caused by determining the engine's maintenance time based on mileage.

[0048] Based on the above technical solutions, S103 specifically includes:

[0049] Obtain the theoretical maintenance mileage of the engine; use the theoretical maintenance mileage and the engine's average fuel consumption to determine the engine's theoretical total fuel consumption, where the engine's average fuel consumption is the average fuel consumption per 100 kilometers determined based on different driving conditions when the engine only uses fuel to provide power to the hybrid vehicle.

[0050] Optionally, determining the theoretical total fuel quantity of the engine using the theoretical maintenance mileage and the engine's average fuel consumption includes: determining the engine's total fuel quantity using the following formula: G=(L*FC) / 100; where G is the theoretical total fuel quantity, L is the theoretical maintenance mileage, and FC is the engine's average fuel consumption.

[0051] Specifically, the unit of average engine fuel consumption FC is L / 100km; the unit of theoretical maintenance mileage L is km; and the unit of theoretical total fuel consumption G is L (liters). Assuming the engine is installed in a pure gasoline car with similar power parameters to the target hybrid vehicle, and that car's fuel consumption is FC, then G = (L*FC) / 100 indicates that the car needs maintenance every L (km) of driving, at which point the car has used G (L) of fuel. Using the above formula, the theoretical total fuel consumption of the engine can be calculated.

[0052] Optionally, S101, obtaining the actual operating parameters of the engine in the hybrid vehicle through the engine controller includes: obtaining the actual torque and actual speed of the engine in the hybrid vehicle through the engine controller.

[0053] Specifically, the vehicle controller can obtain the engine's actual torque T0 and actual speed n through the engine controller. The actual torque T0 is in Newton-meters (Nm), and the actual speed n is in revolutions per minute (rpm). The power output of the engine within each preset time period can be calculated using the formula P = (T0 * n) / 9550. 9550 is a constant that converts the product of torque and speed into kilowatts. This constant is obtained by multiplying 60 (the number of seconds in a minute) by 1000 (converting watts to kilowatts) and then dividing by (2π) (the number of radians of a complete rotation).

[0054] Optionally, obtaining the actual torque of the engine in the hybrid vehicle through the engine controller includes: obtaining the intake air volume and fuel injection volume of the engine in the hybrid vehicle through the engine controller; and determining the actual torque of the engine based on the intake air volume and fuel injection volume.

[0055] Specifically, the engine's actual torque T0 is precisely calculated based on the intake air volume and fuel injection volume during engine operation.

[0056] In this embodiment of the invention, by converting the theoretical total fuel consumption determined using the theoretical maintenance mileage into the theoretical total electricity consumption, and then combining it with the actual power output of the engine to determine the engine maintenance data, not only is the accuracy of engine maintenance calculation improved, but the waste and customer complaints caused by over-maintenance are reduced. At the same time, damage to the engine caused by inaccurate maintenance (such as excessive wear) is also avoided.

[0057] Figure 5 This is a structural diagram of a device for determining engine maintenance data in a hybrid vehicle, as provided in an embodiment of the present invention. Figure 5 As shown, the device for determining the engine maintenance data of the hybrid vehicle specifically includes:

[0058] The parameter acquisition unit 51 is used to acquire the actual operating parameters of the engine in the hybrid vehicle through the engine controller;

[0059] The energy determination unit 52 is used to determine the actual total work done by the engine within a set time based on the actual working parameters, wherein the set time is the time since the last maintenance of the hybrid vehicle's engine.

[0060] The fuel quantity acquisition unit 53 is used to acquire the theoretical maintenance mileage of the engine and determine the theoretical total fuel quantity of the engine within a set time based on the theoretical maintenance mileage.

[0061] The power consumption determination unit 54 is used to convert the theoretical total fuel quantity into the theoretical total power consumption using the fuel-energy consumption conversion relationship;

[0062] The maintenance data determination unit 55 is used to determine the engine's maintenance data using the actual total work done and the theoretical total power consumption.

[0063] Optionally, the maintenance data determination unit 55 specifically includes:

[0064] The percentage determination subunit is used to determine the remaining maintenance percentage of the engine using the actual total power output and the theoretical total power consumption. The remaining maintenance percentage is the proportion of the engine's actual working mileage corresponding to the actual total power output to the theoretical maintenance mileage.

[0065] The time determination subunit is used to determine the actual maintenance time of the engine based on the remaining maintenance percentage.

[0066] Optionally, the percentage-determined sub-unit is specifically used for:

[0067] The remaining percentage of engine maintenance is determined based on the following formula;

[0068] B = (Et - E) / Et;

[0069] Where B represents the remaining maintenance percentage, E represents the actual total work done, and Et represents the theoretical total power consumption.

[0070] Optionally, the time-determining subunit is specifically used for:

[0071] Determine if the remaining maintenance percentage is less than a preset percentage threshold;

[0072] If the value is less than the specified value, it indicates that the engine needs maintenance.

[0073] Otherwise, the actual maintenance time for the engine is determined based on the difference between the remaining maintenance percentage and the preset percentage threshold.

[0074] Optionally, before the energy determination unit 52 determines the actual total work done by the engine within a set time based on actual operating parameters, the following steps are also included:

[0075] The mileage determination unit is used to determine when the engine of a hybrid vehicle reaches the theoretical maintenance condition; where reaching the theoretical maintenance condition means that the vehicle's mileage reaches the theoretical maintenance mileage.

[0076] Optionally, the fuel quantity acquisition unit 53 includes:

[0077] The stroke acquisition subunit is used to obtain the theoretical maintenance mileage of the engine;

[0078] The fuel quantity calculation subunit is used to determine the theoretical total fuel quantity of the engine using the theoretical maintenance mileage and the engine's average fuel consumption. The engine's average fuel consumption is the average fuel consumption per 100 kilometers determined based on different driving conditions when the engine uses only fuel to power the hybrid vehicle.

[0079] Optionally, the fuel quantity calculation subunit is specifically used for:

[0080] The total fuel quantity of the engine can be determined using the following formula;

[0081] G = (L * FC) / 100;

[0082] Where G is the theoretical total fuel consumption, L is the theoretical maintenance mileage, and FC is the engine's average fuel consumption.

[0083] Optionally, the parameter acquisition unit 51 is specifically used for:

[0084] The actual torque and actual speed of the engine in the hybrid vehicle are obtained through the engine controller.

[0085] Optionally, the parameter acquisition unit 51 is also used for:

[0086] The intake air volume and fuel injection volume of the engine in the hybrid vehicle are obtained through the engine controller.

[0087] The actual torque of the engine is determined based on the intake air volume and fuel injection volume.

[0088] The hybrid vehicle engine maintenance data determination device provided in this embodiment of the invention can execute the hybrid vehicle engine maintenance data determination method provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0089] This invention also provides a hybrid vehicle, which includes an engine controller and a vehicle controller; the vehicle controller is used to execute the method for determining engine maintenance data of the hybrid vehicle in any of the above embodiments.

[0090] Optionally, the hybrid vehicle also includes a central control display screen; the central control display screen establishes a communication connection with the vehicle controller based on CAN communication or Ethernet communication; the central control display screen displays engine maintenance data based on the control of the vehicle controller.

[0091] Specifically, the engine controller is the control unit for engine operation, equipped with control software. It can interact with the vehicle controller via CAN communication to exchange the following information: (1) Engine operating status: used to determine whether the engine is working; (2) Engine speed: the actual speed at which the engine is actually running; (3) Actual engine torque: the actual torque of the engine calculated precisely based on the intake air volume and fuel injection volume during engine operation. After receiving the data transmitted by the engine controller, the vehicle controller can calculate the engine maintenance data and display it on the screen via CAN communication or Ethernet (ETH) communication to remind the driver.

[0092] The hybrid vehicle provided in this embodiment of the invention uses the method for determining engine maintenance data of the hybrid vehicle in the above embodiments. Therefore, the hybrid vehicle provided in this embodiment of the invention also has the beneficial effects described in the above embodiments, which will not be repeated here.

[0093] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0094] Finally, it should be noted that the above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A method for determining engine maintenance data for a hybrid vehicle, the method comprising: The determination method comprises: acquiring, by an engine controller, actual working parameters of an engine in a hybrid vehicle; determining an actual total work amount of the engine in a set time based on the actual working parameters, wherein the set time is a time length from when the engine of the hybrid vehicle is completed with the last maintenance; acquiring a theoretical maintenance mileage of the engine, and determining a theoretical total fuel amount of the engine based on the theoretical maintenance mileage; converting the theoretical total fuel amount into a theoretical total power consumption amount by using a fuel-energy conversion relationship; determining maintenance data of the engine by using the actual total work amount and the theoretical total power consumption amount.

2. The method of claim 1, wherein, determining the maintenance data of the engine by using the actual total work amount and the theoretical total power consumption amount comprises: determining a maintenance remaining percentage of the engine by using the actual total work amount and the theoretical total power consumption amount; the maintenance remaining percentage is a proportion of an engine actual work mileage corresponding to the actual total work amount in the theoretical maintenance mileage; determining an actual maintenance time of the engine according to the maintenance remaining percentage.

3. The method of claim 2, wherein: determining the maintenance remaining percentage of the engine by using the actual total work amount and the theoretical total power consumption amount comprises: determining the maintenance remaining percentage of the engine based on the following formula: B = (Et-E) / Et; wherein B is the maintenance remaining percentage, E is the actual total work amount, and Et is the theoretical total power consumption amount.

4. The method of claim 2, wherein, determining the actual maintenance time of the engine according to the maintenance remaining percentage comprises: judging whether the maintenance remaining percentage is less than a preset percentage threshold; if yes, prompting that the engine currently needs maintenance; otherwise, determining the actual maintenance time of the engine based on a difference between the maintenance remaining percentage and the preset percentage threshold.

5. The method of claim 1, wherein: before determining the actual total work amount of the engine in the set time based on the actual working parameters, further comprising: determining that the engine of the hybrid vehicle reaches a theoretical maintenance condition; wherein reaching the theoretical maintenance condition means that a driving mileage of the vehicle reaches a theoretical maintenance mileage.

6. The method of claim 1, wherein: acquiring the theoretical maintenance mileage of the engine, and determining the theoretical total fuel amount of the engine based on the theoretical maintenance mileage comprises: acquiring the theoretical maintenance mileage of the engine; determining the theoretical total fuel amount of the engine by using the theoretical maintenance mileage and an engine average fuel consumption; wherein the engine average fuel consumption is a hundred-kilometer average fuel consumption of the engine when the engine only uses fuel to provide power for the hybrid vehicle.

7. The method of claim 6, wherein the engine maintenance data is determined based on the engine operating conditions and the engine operating conditions are determined based on the vehicle operating conditions. determining the theoretical total fuel amount of the engine by using the theoretical maintenance mileage and the engine average fuel consumption comprises: determining the total fuel amount of the engine by using the following formula: G = (L*FC) / 100; wherein G is the theoretical total fuel amount, L is the theoretical maintenance mileage, and FC is the engine average fuel consumption.

8. The method of claim 1, wherein: acquiring, by the engine controller, the actual working parameters of the engine in the hybrid vehicle comprises: acquiring, by the engine controller, an actual torque and an actual rotating speed of the engine in the hybrid vehicle.

9. The method of claim 8, wherein, acquiring, by the engine controller, the actual torque of the engine in the hybrid vehicle comprises: An engine controller is used to obtain an intake amount and a fuel injection amount of an engine in a hybrid vehicle; An actual torque of the engine is determined based on the intake amount and the fuel injection amount.

10. A hybrid vehicle engine maintenance data determination device characterized by comprising: The determining device comprises: A parameter obtaining unit is configured to obtain an actual working parameter of an engine in a hybrid vehicle through an engine controller; An energy determining unit is configured to determine an actual total work amount of the engine within a set time based on the actual working parameter, wherein the set time is a time length from when the engine in the hybrid vehicle is completed with a last maintenance; A fuel amount obtaining unit is configured to obtain a theoretical maintenance mileage of the engine, and determine a theoretical total fuel amount of the engine based on the theoretical maintenance mileage; An electric consumption determining unit is configured to convert the theoretical total fuel amount into a theoretical total electric consumption amount by using a fuel-electric consumption conversion relationship; A maintenance data determining unit is configured to determine maintenance data of the engine by using the actual total work amount and the theoretical total electric consumption amount.

11. A hybrid vehicle characterized by comprising: The hybrid vehicle comprises an engine controller and a vehicle controller; the vehicle controller is configured to execute the method for determining the maintenance data of the engine in the hybrid vehicle according to any one of claims 1-9.

12. The hybrid vehicle of claim 11, wherein, The hybrid vehicle further comprises a central control display screen; the central control display screen is communicatively connected with the vehicle controller based on CAN communication or Ethernet communication; The central control display screen displays the maintenance data of the engine based on the control of the vehicle controller.

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