Engine torque compensation correction method and system

Abstract

The invention discloses an engine torque compensation correction method and system. The engine torque compensation correction method mainly comprises the steps that firstly, the fuel oil temperature, the fuel injection quantity and the fuel oil quantity limiting value are obtained; according to the fuel oil temperature, a preset fuel oil quantity limit value correction volume is obtained; correcting the fuel quantity limit value by using the fuel quantity limit value correction volume to obtain an actual fuel quantity limit value; whether the fuel injection quantity is larger than the actual fuel quantity limit value or not is judged; if not, the power-up time is obtained according to the fuel injection quantity; if yes, the power-up time is obtained according to the actual fuel quantity limit value; and according to the power-up time, the electric control pump is controlled to inject the actual fuel injection amount, and the engine outputs the actual torque. Therefore, on the basis of correction under the existing fuel advance angle, correction of the fuel temperature to the fuel injection quantity limit value is increased, and the fuel quantity is additionally increased or reduced on the basis of the original engine fuel injection quantity limit value, so that the engine can be corrected at different fuel temperatures, and the torque output requirement of the engine is ensured.

Description

Technical Field

[0001] This invention relates to the field of engine technology, and in particular to an engine torque compensation correction method and system. Background Technology

[0002] Existing electronically controlled pump engines typically have fuel temperature correction for the engine injection advance angle, but do not have correction for the injection quantity and injection quantity limit.

[0003] When fuel temperature rises, engine knock pressure and exhaust temperature can only be slightly adjusted by adjusting the injection advance angle; the cyclic injection quantity limit cannot be corrected. However, as fuel temperature increases, fuel density decreases. According to the relationship mass = volume × density, although the same volume is injected, the fuel mass is reduced, resulting in insufficient fuel injection and the engine failing to output the required torque. Conversely, as fuel temperature decreases, fuel density increases, leading to a greater mass of fuel injected and increased engine torque. When the temperature falls below a certain level, the engine risks over-torque output. Summary of the Invention

[0004] To address the aforementioned shortcomings, the technical problem to be solved by this invention is to provide an engine torque compensation correction method and system that, based on existing fuel advance angle correction, adds corrections to the fuel temperature on the cyclic injection quantity limit, etc., so that the engine can ensure the engine torque output requirements under different fuel temperatures through correction strategies.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0006] An engine torque compensation correction method includes the following steps:

[0007] S10. Obtain fuel temperature, injection quantity, and fuel quantity limit;

[0008] S20. Based on the fuel temperature, obtain the preset fuel quantity limit correction volume;

[0009] S30. Correct the fuel quantity limit using the fuel quantity limit correction volume to obtain the actual fuel quantity limit.

[0010] S40. Determine whether the injected fuel quantity is greater than the actual fuel quantity limit.

[0011] S50. If the amount of injected fuel is not greater than the actual fuel quantity limit, the corresponding energizing time is obtained based on the amount of injected fuel.

[0012] If the injected fuel quantity is greater than the actual fuel quantity limit, the corresponding charging time is obtained based on the actual fuel quantity limit.

[0013] S60: Based on the energization time, control the electronically controlled pump to inject the actual amount of fuel and output the actual torque of the engine.

[0014] In a preferred embodiment, step S20 further includes: obtaining a preset leakage correction volume based on the fuel temperature;

[0015] The S30 further includes: correcting the injection quantity using the leakage correction volume to obtain the injection quantity requirement value;

[0016] S40 includes: determining whether the required value of the injected fuel quantity is greater than the actual fuel quantity limit;

[0017] S50 includes: if the required amount of injected fuel is not greater than the actual fuel quantity limit, obtaining the corresponding energizing time based on the required amount of injected fuel;

[0018] If the required amount of injected fuel is greater than the actual fuel quantity limit, the corresponding energizing time is obtained based on the actual fuel quantity limit.

[0019] In a preferred embodiment, S20 includes:

[0020] Based on the fuel temperature, query the preset fuel quantity limit correction curve to obtain the preset fuel quantity limit correction volume;

[0021] Based on the fuel temperature, the preset fuel leakage correction curve is consulted to obtain the preset leakage correction volume.

[0022] In a preferred embodiment, S10 further includes:

[0023] Obtain fuel pressure and cyclic injection quantity;

[0024] Based on the fuel temperature and fuel pressure, query the preset density map to obtain the corresponding fuel density;

[0025] Then calculate the ratio of the cyclic injection fuel quantity to the fuel density to obtain the injection fuel quantity.

[0026] In a preferred embodiment, S10 further includes:

[0027] Obtain the target speed and real-time speed;

[0028] The speed deviation is calculated using the target speed and the real-time speed.

[0029] Then, based on the speed deviation, the required torque is obtained, and then the circulating injection oil quantity is obtained.

[0030] The preferred method is to query a preset power-on time map in step S50 to obtain the corresponding power-on time.

[0031] An engine torque compensation correction system includes an electronic control unit (ECU) and a data acquisition unit, a volume correction unit, an energization time correction unit, and an electronically controlled pump, all electrically connected to the ECU. The data acquisition unit acquires fuel temperature, injection quantity, and fuel quantity limit, and transmits the corresponding data signals to the ECU. The ECU transmits data signals to the volume correction unit and the energization time correction unit. The volume correction unit calculates a preset fuel quantity limit correction volume based on the fuel temperature, and then corrects the fuel quantity limit using this correction volume to obtain the actual fuel quantity. The system receives the fuel injection limit value and then transmits the actual fuel injection limit value to the electronic control unit (ECU). The ECU then transmits the actual fuel injection limit value to the energizing time correction unit. The energizing time correction unit determines whether the fuel injection quantity is greater than the actual fuel injection limit value. If the fuel injection quantity is not greater than the actual fuel injection limit value, the corresponding energizing time is obtained based on the fuel injection quantity. If the fuel injection quantity is greater than the actual fuel injection limit value, the corresponding energizing time is obtained based on the actual fuel injection limit value, and then transmitted to the electronically controlled pump. The electronically controlled pump injects the corresponding actual fuel injection quantity according to the received energizing time, causing the engine to output actual torque.

[0032] In a preferred embodiment, the volume correction unit is further configured to obtain a preset leakage correction volume based on the fuel temperature, correct the injection quantity using the leakage correction volume to obtain the injection quantity demand value, and then transmit the injection quantity demand value to the electronic control unit. The electronic control unit then transmits the injection quantity demand value to the power-on time correction unit. The power-on time correction unit is configured to determine whether the injection quantity demand value is greater than the actual fuel quantity limit. If the injection quantity demand value is not greater than the actual fuel quantity limit, the corresponding power-on time is obtained based on the injection quantity demand value. If the injection quantity demand value is greater than the actual fuel quantity limit, the corresponding power-on time is obtained based on the actual fuel quantity limit.

[0033] In a preferred embodiment, the system further includes a density correction unit electrically connected to the electronic control unit. The density correction unit is used to query a preset density map based on the fuel temperature and fuel pressure to obtain the corresponding fuel density, then calculate the injection quantity using the quotient of the cyclic injection quantity and the preset fuel density, and then transmit the injection quantity to the electronic control unit.

[0034] In a preferred embodiment, the system further includes a preset unit electrically connected to the electronic control unit. The preset unit is used to preset a density map based on fuel temperature, fuel pressure, and fuel density; to preset a fuel quantity limit correction curve based on fuel temperature and fuel quantity limit correction volume; and to preset a fuel leakage correction curve based on fuel temperature and leakage amount correction volume.

[0035] After adopting the above technical solution, the beneficial effects of the present invention are:

[0036] The engine torque compensation correction method and system of the present invention mainly involves first obtaining the fuel temperature, injection quantity, and fuel quantity limit; then, based on the fuel temperature, obtaining a preset fuel quantity limit correction volume; correcting the fuel quantity limit using the fuel quantity limit correction volume to obtain the actual fuel quantity limit; determining whether the injection quantity is greater than the actual fuel quantity limit; if the injection quantity is not greater than the actual fuel quantity limit, obtaining the corresponding energizing time based on the injection quantity; if the injection quantity is greater than the actual fuel quantity limit, obtaining the corresponding energizing time based on the actual fuel quantity limit; and controlling the electronically controlled pump to inject the actual fuel injection quantity based on the energizing time, thereby ensuring the engine outputs the actual torque. It can be seen that the present invention, based on existing fuel advance angle correction, adds fuel temperature correction for the injection quantity limit, etc., and additionally increases or decreases the fuel quantity based on the original engine injection quantity limit, so that the engine can be corrected under different fuel temperatures, thereby ensuring the engine's torque output requirements. Attached Figure Description

[0037] Figure 1 This is a logic diagram of the engine torque compensation correction method in this invention;

[0038] Figure 2 This is a schematic diagram of the engine torque compensation correction system in this invention. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below 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 are not intended to limit the invention.

[0040] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0041] Furthermore, it should be noted that, in the description of this 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 this invention according to the specific circumstances.

[0042] The cyclic injection fuel quantity involved in this invention refers to the fuel injection mass of each cylinder in each working cycle of the engine.

[0043] The amount of fuel injected in this invention refers to the volume of fuel injected into each cylinder during each working cycle of the engine.

[0044] The fuel injection quantity limit involved in this invention refers to the maximum fuel injection quantity per cycle of the engine at various speeds.

[0045] Example 1:

[0046] like Figure 1 As shown, an engine torque compensation correction method includes the following steps:

[0047] Step S10: Obtain fuel temperature, injection quantity, and fuel quantity limit;

[0048] Step S20: Obtain the preset fuel quantity limit correction volume based on the fuel temperature; in this embodiment, the leakage correction volume can be obtained by querying a preset fuel leakage correction curve based on the fuel temperature. Of course, it is not limited to the fuel leakage correction curve, but can also be queried from preset tables, etc.

[0049] Step S30: Correct the fuel quantity limit using the fuel quantity limit correction volume to obtain the actual fuel quantity limit; the specific correction method is: actual fuel quantity limit = fuel quantity limit plus or minus fuel quantity limit correction volume.

[0050] Step S40: Determine whether the injected fuel quantity is greater than the actual fuel quantity limit;

[0051] Step S50: If the injected fuel quantity is not greater than the actual fuel quantity limit, that is, the injected fuel quantity is less than or equal to the actual fuel quantity limit, the corresponding energizing time is obtained based on the injected fuel quantity.

[0052] If the injected fuel quantity is greater than the actual fuel quantity limit, i.e., the injected fuel quantity > the actual fuel quantity limit, the corresponding energizing time is obtained based on the actual fuel quantity limit.

[0053] Step S60: Based on the power-on time, control the electronically controlled pump to inject the actual fuel injection quantity, and the engine outputs the actual torque.

[0054] The engine torque compensation correction method of this invention, based on existing fuel advance angle correction, adds correction for fuel temperature on fuel quantity limits, etc. Specifically, it adds or reduces the fuel quantity beyond the original fuel quantity limit corresponding to the engine's maximum torque. This allows the engine to determine the corresponding energizing time under different fuel temperatures by correcting the fuel quantity limit, thereby controlling the actual fuel injection quantity of the electronically controlled pump and ultimately outputting the actual torque (actual maximum torque) to ensure the engine's torque output requirements. In other words, this invention prevents insufficient engine torque or overload operation by controlling the engine's fuel injection quantity limit. Furthermore, this invention has the advantages of simple operation, low cost, and ease of implementation. Figure 1 As shown, the engine torque compensation correction method of this embodiment also includes fuel leakage correction. Therefore, step S20 further includes: obtaining a preset leakage correction volume based on the fuel temperature. In this embodiment, the preset leakage correction volume is obtained by querying a preset fuel leakage correction curve based on the fuel temperature.

[0055] Step S30 further includes: correcting the injection quantity using the leakage correction volume to obtain the injection quantity requirement value; the specific correction method is: injection quantity requirement value = injection quantity plus or minus leakage correction volume.

[0056] Step S40 includes: determining whether the required amount of injected fuel is greater than the actual fuel quantity limit;

[0057] Step S50 includes: if the required amount of injected fuel is not greater than the actual fuel quantity limit, obtaining the corresponding energizing time based on the required amount of injected fuel;

[0058] If the required amount of injected fuel is greater than the actual fuel quantity limit, the corresponding energizing time is obtained based on the actual fuel quantity limit.

[0059] The engine torque compensation correction method of the present invention, based on the existing fuel advance angle correction, adds correction for fuel temperature on leakage, etc., to avoid engine power reduction and ensure engine torque output requirements.

[0060] It is important to note that the principle behind fuel leakage correction is as follows: fuel temperature and fuel viscosity are negatively correlated. Leakage between the fuel pump plunger and pump body increases with rising temperature, delaying fuel pressure build-up within the fuel pump, postponing injection timing, and reducing maximum injection pressure. With a constant fuel injection time, the decrease in diesel density and the increase in leakage from the unit pump directly lead to a reduction in the amount of fuel injected per cycle, consequently reducing engine power. This invention solves the aforementioned technical problems and reduces the impact on engine power by correcting fuel leakage.

[0061] like Figure 1As shown, the engine torque compensation correction method in this embodiment also includes density correction:

[0062] Step S10 also includes acquiring fuel pressure, target speed, and real-time speed;

[0063] The speed deviation is calculated using the target speed and the real-time speed.

[0064] Based on the speed deviation, the required torque is obtained, and then the circulating injection oil quantity is obtained;

[0065] Based on the fuel temperature and fuel pressure, query the preset density map to obtain the corresponding fuel density;

[0066] Then calculate the ratio of the cyclic injection fuel quantity to the fuel density to obtain the injection fuel quantity.

[0067] This invention uses the correlation curve between fuel temperature and fuel density to correct the density of fuel. Specifically, it transforms the existing correlation curve between fuel density and fuel temperature into a correlation surface (map) between fuel density and fuel temperature and fuel pressure, thereby achieving precise control of fuel density and preventing engine overload operation.

[0068] It should be noted that the engine calculates the required torque based on the speed deviation between the target speed and the actual speed. Then, through internal conversion, the required torque is converted into the engine's cyclic injection fuel quantity. The cyclic injection fuel mass is divided by the fuel density to obtain the engine's injection fuel volume. Based on the flow characteristics, the correspondence between the injection fuel quantity (injection volume) and the energizing time of the injection pump is determined. Finally, by looking up the engine speed, injection fuel quantity requirement value or fuel quantity limit, and energizing time map, the corresponding energizing time is calculated and input to the electronically controlled pump to control the actual injection fuel quantity (injection volume).

[0069] like Figure 1 As shown, in the engine torque compensation correction method of this embodiment, step S50 queries a preset energizing time map to obtain the corresponding energizing time. Specifically:

[0070] If the required amount of injected fuel is not greater than the actual fuel quantity limit, the corresponding energizing time is obtained by querying the preset energizing time map based on the required amount of injected fuel.

[0071] If the required amount of injected fuel is greater than the actual fuel quantity limit, the corresponding energizing time is obtained by querying the preset energizing time map based on the actual fuel quantity limit.

[0072] As can be seen, this invention uses the corrected injection fuel quantity requirement value or the actual fuel quantity limit value to query the energizing time map, thereby indirectly correcting the energizing time by fuel temperature, improving the reliability of engine operation, ensuring the amount of fuel required for electronic pump injection, and ensuring the engine output torque requirement.

[0073] In summary, this invention achieves accurate calculation of fuel density based on fuel temperature and pressure, and adds fuel temperature correction for leakage in the unit pump plunger and pump body, making the corrected injection quantity closer to the actual value. Simultaneously, the correction of the injection quantity limit avoids a decrease in engine output torque caused by the corrected injection quantity (demand value) exceeding the injection quantity limit; it also improves the adaptability of electronic control data to fuel temperature differences, reducing the need for electronic control data changes and rewriting due to fuel temperature variations.

[0074] This invention is a method for compensating and correcting engine output torque based on fuel temperature changes. On the basis of existing fuel advance angle correction, it adds correction of fuel density, injection quantity, and cyclic injection quantity limits by fuel temperature. That is, it adds or reduces the fuel quantity on the basis of the original engine cyclic injection quantity limits. Through the correction method of this invention, the engine torque output requirements are guaranteed under different fuel temperatures.

[0075] Example 2:

[0076] like Figure 2 As shown, an engine torque compensation correction system can apply the engine torque compensation correction method described in Embodiment 1. It includes an electronic control unit and a data acquisition unit, a volume correction unit, an energizing time correction unit, an electronically controlled pump, a density correction unit, and a preset unit, all electrically connected to the electronic control unit.

[0077] The data acquisition unit collects fuel temperature, injection quantity, and fuel quantity limits, and transmits the corresponding data signals to the electronic control unit (ECU). The ECU then transmits the data signals to the volume correction unit and the power-on time correction unit. Additionally, the fuel temperature can be detected by a temperature sensor, and in this embodiment, a speed sensor is also included to collect the real-time engine speed.

[0078] The volume correction unit is used to obtain a preset fuel quantity limit correction volume based on the fuel temperature, then use the fuel quantity limit correction volume to correct the fuel quantity limit to obtain the actual fuel quantity limit, and then transmit the actual fuel quantity limit to the electronic control unit. The electronic control unit transmits the actual fuel quantity limit to the power-on time correction unit. In this embodiment, the volume correction unit is also used to obtain a preset leakage correction volume based on the fuel temperature, use the leakage correction volume to correct the injection fuel quantity to obtain the injection fuel quantity demand value, and then transmit the injection fuel quantity demand value to the electronic control unit. The electronic control unit transmits the injection fuel quantity demand value to the power-on time correction unit.

[0079] The energizing time correction unit determines whether the injected fuel quantity exceeds the actual fuel quantity limit. If the injected fuel quantity is not greater than the actual fuel quantity limit, the corresponding energizing time is obtained based on the injected fuel quantity. If the injected fuel quantity exceeds the actual fuel quantity limit, the corresponding energizing time is obtained based on the actual fuel quantity limit, and then transmitted to the electronically controlled pump. The electronically controlled pump injects the corresponding actual fuel injection quantity based on the received energizing time, causing the engine to output actual torque. In this embodiment, the energizing time correction unit determines whether the required injected fuel quantity exceeds the actual fuel quantity limit. If the required injected fuel quantity is not greater than the actual fuel quantity limit, the corresponding energizing time is obtained based on the required injected fuel quantity. If the required injected fuel quantity exceeds the actual fuel quantity limit, the corresponding energizing time is obtained based on the actual fuel quantity limit.

[0080] The density correction unit is used to look up a preset density map based on fuel temperature and fuel pressure to obtain the corresponding fuel density, then calculate the injection quantity using the quotient of the cyclic injection quantity and the preset fuel density, and then transmit the injection quantity to the electronic control unit.

[0081] The preset unit is used to preset a density map based on fuel temperature, fuel pressure, and fuel density; to preset a fuel quantity limit correction curve based on fuel temperature and fuel quantity limit correction volume; and to preset a fuel leakage correction curve based on fuel temperature and leakage amount correction volume.

[0082] When the engine torque compensation correction system of the present invention is used, the data acquisition unit collects data in real time, and the electronic control unit transmits the corresponding data to the volume correction unit, density correction and ignition time correction unit, so as to correct the fuel quantity limit, injection quantity and ignition time, so that the engine can ensure the engine torque output requirements under different fuel temperatures through the correction strategy.

[0083] As can be seen, this invention achieves accurate calculation of fuel density based on fuel temperature and pressure, and increases the correction for leakage in the unit pump plunger and pump body due to fuel temperature, making the corrected injection quantity closer to the actual value. Simultaneously, the correction of the injection quantity limit avoids a decrease in engine output torque caused by the corrected injection quantity (demand value) exceeding the injection quantity limit; it also improves the adaptability of electronic control data to fuel temperature differences, reducing the need for electronic control data changes and rewriting due to fuel temperature variations.

[0084] This invention realizes the correction of engine output torque compensation based on fuel temperature changes. On the basis of existing fuel advance angle correction, it adds the correction of fuel density, injection quantity and cycle injection quantity limit by fuel temperature. That is, it adds or reduces the fuel quantity on the basis of the original engine cycle injection quantity limit.

[0085] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent engine torque compensation correction methods and system improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for engine torque compensation correction, characterized in that, Includes the following steps: S10. Obtain fuel temperature, injection quantity, and fuel quantity limit; S20. Based on the fuel temperature, obtain the preset fuel quantity limit correction volume; S30. Correct the fuel quantity limit using the fuel quantity limit correction volume to obtain the actual fuel quantity limit. S40. Determine whether the injected fuel quantity is greater than the actual fuel quantity limit. S50. If the amount of injected fuel is not greater than the actual fuel quantity limit, the corresponding energizing time is obtained based on the amount of injected fuel. If the injected fuel quantity is greater than the actual fuel quantity limit, the corresponding charging time is obtained based on the actual fuel quantity limit. S60: Based on the energization time, control the electronically controlled pump to inject the actual amount of fuel and output the actual torque of the engine.

2. The engine torque compensation correction method according to claim 1, characterized in that, The S20 further includes: obtaining a preset leakage correction volume based on the fuel temperature; The S30 further includes: correcting the injection quantity using the leakage correction volume to obtain the injection quantity requirement value; S40 includes: determining whether the required value of the injected fuel quantity is greater than the actual fuel quantity limit; S50 includes: if the required amount of injected fuel is not greater than the actual fuel quantity limit, obtaining the corresponding energizing time based on the required amount of injected fuel; If the required amount of injected fuel is greater than the actual fuel quantity limit, the corresponding energizing time is obtained based on the actual fuel quantity limit.

3. The engine torque compensation correction method according to claim 2, characterized in that, S20 includes: Based on the fuel temperature, query the preset fuel quantity limit correction curve to obtain the preset fuel quantity limit correction volume; Based on the fuel temperature, the preset fuel leakage correction curve is consulted to obtain the preset leakage correction volume.

4. The engine torque compensation correction method according to claim 1, characterized in that, S10 further includes: Obtain fuel pressure and cyclic injection quantity; Based on the fuel temperature and fuel pressure, query the preset density map to obtain the corresponding fuel density; Then calculate the ratio of the cyclic injection fuel quantity to the fuel density to obtain the injection fuel quantity.

5. The engine torque compensation correction method according to claim 4, characterized in that, S10 further includes: Obtain the target speed and real-time speed; The speed deviation is calculated using the target speed and the real-time speed. Then, based on the speed deviation, the required torque is obtained, and then the circulating injection oil quantity is obtained.

6. The engine torque compensation correction method according to any one of claims 1 to 5, characterized in that, In step S50, the preset power-on time map is queried to obtain the corresponding power-on time.

7. An engine torque compensation correction system, characterized in that, It includes an electronic control unit and a data acquisition unit, a volume correction unit, a power-on time correction unit, and an electronically controlled pump, all of which are electrically connected to the electronic control unit. The data acquisition unit is used to acquire fuel temperature, injection quantity and fuel quantity limit, and transmit the corresponding data signals to the electronic control unit. The electronic control unit transmits the data signals to the volume correction unit and the power-on time correction unit. The volume correction unit is used to obtain a preset fuel quantity limit correction volume based on the fuel temperature, then use the fuel quantity limit correction volume to correct the fuel quantity limit to obtain the actual fuel quantity limit, and then transmit the actual fuel quantity limit to the electronic control unit. The electronic control unit transmits the actual fuel quantity limit to the power-on time correction unit. The power-on time correction unit is used to determine whether the injection amount is greater than the actual fuel quantity limit. If the injection amount is not greater than the actual fuel quantity limit, the corresponding power-on time is obtained based on the injection amount. If the injection amount is greater than the actual fuel quantity limit, the corresponding power-on time is obtained based on the actual fuel quantity limit, and then the power-on time is transmitted to the electronically controlled pump. The electronically controlled pump injects the corresponding actual fuel injection amount according to the received power-on time, so that the engine outputs actual torque.

8. The engine torque compensation correction system according to claim 7, characterized in that, The volume correction unit is also used to obtain a preset leakage correction volume based on the fuel temperature, correct the injection quantity using the leakage correction volume to obtain the injection quantity demand value, and then transmit the injection quantity demand value to the electronic control unit. The electronic control unit then transmits the injection quantity demand value to the power-on time correction unit. The power-on time correction unit is used to determine whether the fuel injection quantity demand value is greater than the actual fuel quantity limit value. If the fuel injection quantity demand value is not greater than the actual fuel quantity limit value, the corresponding power-on time is obtained based on the fuel injection quantity demand value. If the fuel injection quantity demand value is greater than the actual fuel quantity limit value, the corresponding power-on time is obtained based on the actual fuel quantity limit value.

9. The engine torque compensation correction system according to claim 8, characterized in that, The system also includes a density correction unit electrically connected to the electronic control unit. The density correction unit is used to query a preset density map based on the fuel temperature and fuel pressure to obtain the corresponding fuel density, then calculate the injection quantity using the quotient of the cyclic injection quantity and the preset fuel density, and then transmit the injection quantity to the electronic control unit.

10. The engine torque compensation correction system according to claim 9, characterized in that, The system also includes a preset unit electrically connected to the electronic control unit. The preset unit is used to preset a density map based on fuel temperature, fuel pressure and fuel density; and to preset a fuel quantity limit correction curve based on fuel temperature and fuel quantity limit correction volume. Used to correct volume based on fuel temperature and leakage amount, with a preset fuel leakage amount correction curve.

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