Gas engine exhaust system and transient torque broadcasting method

Abstract

The invention relates to an exhaust system of a gas engine. The system comprises an exhaust manifold, a first-cylinder ignition coil, a second-cylinder ignition coil, a third-cylinder ignition coil, an intake manifold, an intake throttle valve, a fuel gas metering valve, an intelligent control module, a fourth-cylinder ignition coil, a fifth-cylinder ignition coil, a sixth-cylinder ignition coil, a crankshaft rotating speed sensor, a sixth-cylinder exhaust temperature sensor, a fifth-cylinder exhaust temperature sensor and a rear exhaust pressure sensor. The system comprises a four-cylinder exhaust temperature sensor, a three-cylinder exhaust temperature sensor, a front exhaust pressure sensor, a two-cylinder exhaust temperature sensor, a one-cylinder exhaust temperature sensor and a control line. According to the method, the gas engine torque broadcast is corrected, and an accurate torque value is broadcasted, so that automatic gearbox matching is facilitated, and the problems of gear shifting pause and vehicle shaking are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas engines, in particular to a gas engine exhaust system and a transient torque reporting method. BACKGROUND

[0002] The national sixth natural gas engine adopts equivalent combustion, and the engine gas needs to be mixed with air in the engine cylinder outside the intake manifold before entering the cylinder for combustion. This process has a certain delay, and the current general gas engine torque reporting is based on the gas amount after the torque conversion starting from the gas injection time.

[0003] The defects of the prior art are: The existing technology reports the torque greater than the actual output torque at the instant of refueling, and at the instant of releasing the throttle, there is still gas in the intake manifold that has not entered the cylinder, resulting in the torque reported based on the gas amount at the instant of releasing the throttle being less than the actual output torque, which will cause gear shifting jerk and vehicle shaking during automatic transmission matching. SUMMARY

[0004] The present application provides a gas engine exhaust system and a transient torque reporting method to solve the above problems, which aims to correct the torque reporting of the gas engine and report the accurate torque value, so as to facilitate the automatic transmission matching and reduce the gear shifting jerk and vehicle shaking.

[0005] To solve the above problems, the technical scheme provided by the present application is: A gas engine exhaust system, comprising an exhaust manifold, a one-cylinder ignition coil, a two-cylinder ignition coil, a three-cylinder ignition coil, an intake manifold, an intake throttle valve, a gas metering valve, an intelligent control module, a four-cylinder ignition coil, a five-cylinder ignition coil, a six-cylinder ignition coil, a crankshaft speed sensor, a six-cylinder exhaust temperature sensor, a five-cylinder exhaust temperature sensor, a rear exhaust pressure sensor, a four-cylinder exhaust temperature sensor, a three-cylinder exhaust temperature sensor, a front exhaust pressure sensor, a two-cylinder exhaust temperature sensor, a one-cylinder exhaust temperature sensor, and a control line, wherein: The one cylinder ignition coil, the two cylinder ignition coil, the three cylinder ignition coil, the four cylinder ignition coil 9, the five cylinder ignition coil, the six cylinder ignition coil are respectively installed on the corresponding cylinders above the engine cylinder head; the exhaust manifold is installed on the exhaust side of the gas engine cylinder head; the one cylinder exhaust temperature sensor is installed on the one cylinder outlet of the exhaust manifold, the two cylinder exhaust temperature sensor is installed on the two cylinder outlet, the three cylinder exhaust temperature sensor is installed on the three cylinder outlet, the four cylinder exhaust temperature sensor is installed on the four cylinder outlet, the five cylinder exhaust temperature sensor is installed on the five cylinder outlet, and the six cylinder exhaust temperature sensor is installed on the six cylinder outlet; the rear exhaust pressure sensor and the front exhaust pressure sensor are respectively installed on both sides of the exhaust manifold; the intake manifold is installed on the intake side of the engine cylinder head; one end of the intake throttle valve is connected to the intake port of the intake manifold; one end of the gas metering valve is connected to the intake manifold; the crankshaft speed sensor is installed on the outside of the engine crankshaft; the intelligent control module is electrically connected to the one cylinder exhaust temperature sensor, the two cylinder exhaust temperature sensor, the three cylinder exhaust temperature sensor, the four cylinder exhaust temperature sensor, the five cylinder exhaust temperature sensor, the six cylinder exhaust temperature sensor, the rear exhaust pressure sensor, the front exhaust pressure sensor, the intake throttle valve, the gas metering valve, and the crankshaft speed sensor through the control line.

[0006] A transient torque broadcasting method using the gas engine exhaust system, comprising the following steps: S100. Control the intelligent control module to collect engine exhaust temperature, exhaust pressure, intake throttle valve opening degree, gas flow, ignition coil ignition signal, and crankshaft speed signal. S200. At the moment of engine oiling, control the intelligent control module to record the theoretical torque before oiling. S300. Control the intake throttle valve opening degree of the intake throttle valve to control the gas supply, and measure the gas flow by gas metering method; control the crankshaft speed sensor to measure the crankshaft speed. S400. Calculate the theoretical torque after oiling at this time according to the preset initial calibration value. S500. According to the monitoring values of the exhaust temperatures of the six cylinders and the exhaust pressures of the corresponding sides, broadcast the torque according to the preset oiling stage broadcasting rule. S600. At the moment of engine oiling, control the intelligent control module to record the theoretical torque before oiling. S700. Control the intake throttle valve opening degree of the intake throttle valve to control the gas supply, and measure the gas flow by the gas metering valve; control the crankshaft speed sensor to measure the crankshaft speed. S800. Calculate the current reduced fuel theoretical torque according to the initial calibration value; S900. According to the monitoring values of the exhaust temperature of the six cylinders and the exhaust pressure of the corresponding side, broadcast the torque externally according to the preset reduced fuel stage broadcast rule.

[0007] Preferably, the intake throttle valve controls the gas supply according to the equivalent combustion ratio.

[0008] Preferably, the equivalent combustion ratio is the mass ratio of air and gas being 17.2:1.

[0009] Preferably, the oiling stage broadcast rule is: If the exhaust temperature of one cylinder increases by more than a preset temperature threshold, and the exhaust pressure of the corresponding side also increases, while the temperature change of the remaining cylinders is less than or equal to the temperature threshold, then the torque broadcast externally is five-sixths of the pre-fueling theoretical torque plus one-sixth of the post-fueling theoretical torque; If the exhaust temperature of two cylinders increases by more than the temperature threshold, and the exhaust pressure of the corresponding side also increases, while the temperature change of the remaining cylinders is less than or equal to the temperature threshold, then the torque broadcast externally is four-sixths of the pre-fueling theoretical torque plus two-sixths of the post-fueling theoretical torque; If the exhaust temperature of three cylinders increases by more than the temperature threshold, and the exhaust pressure of the corresponding side also increases, while the temperature change of the remaining cylinders is less than or equal to the temperature threshold, then the torque broadcast externally is three-sixths of the pre-fueling theoretical torque plus three-sixths of the post-fueling theoretical torque; If the exhaust temperature of four cylinders increases by more than the temperature threshold, and the exhaust pressure of the corresponding side also increases, while the temperature change of the remaining cylinders is less than or equal to the temperature threshold, then the torque broadcast externally is two-sixths of the pre-fueling theoretical torque plus four-sixths of the post-fueling theoretical torque; If the exhaust temperature of five cylinders increases by more than the temperature threshold, and the exhaust pressure of the corresponding side also increases, while the temperature change of the remaining cylinders is less than or equal to the temperature threshold, then the torque broadcast externally is one-sixth of the pre-fueling theoretical torque plus five-sixths of the post-fueling theoretical torque; If it is determined that all six cylinders are ignited, and the gas flow is stable, then the torque broadcast externally is the post-fueling theoretical torque.

[0010] Preferably, the reduced fuel stage broadcast rule is: If the exhaust temperature of the six cylinders of the engine changes by less than or equal to the temperature threshold, and the exhaust pressure also does not change, then the pre-reduced fuel theoretical torque is broadcast externally; If the exhaust temperature of one cylinder decreases more than the temperature threshold value while the exhaust pressure decreases, and the temperature change of the remaining cylinders is less than or equal to the temperature threshold value, the torque broadcasted externally is five-sixths of the pre-fuel-cut theoretical torque plus one-sixth of the post-fuel-cut theoretical torque; If the exhaust temperature of two cylinders decreases more than the temperature threshold value while the exhaust pressure decreases, and the temperature change of the remaining cylinders is less than or equal to the temperature threshold value, the torque broadcasted externally is four-sixths of the pre-fuel-cut theoretical torque plus two-sixths of the post-fuel-cut theoretical torque; If the exhaust temperature of three cylinders decreases more than the temperature threshold value while the exhaust pressure decreases, and the temperature change of the remaining cylinders is less than or equal to the temperature threshold value, the torque broadcasted externally is three-sixths of the pre-fuel-cut theoretical torque plus three-sixths of the post-fuel-cut theoretical torque; If the exhaust temperature of four cylinders decreases more than the temperature threshold value while the exhaust pressure decreases, and the temperature change of the remaining cylinders is less than or equal to the temperature threshold value, the torque broadcasted externally is two-sixths of the pre-fuel-cut theoretical torque plus four-sixths of the post-fuel-cut theoretical torque; If the exhaust temperature of five cylinders decreases more than the temperature threshold value while the exhaust pressure decreases, and the temperature change of the remaining cylinders is less than or equal to the temperature threshold value, the torque broadcasted externally is one-sixth of the pre-fuel-cut theoretical torque plus five-sixths of the post-fuel-cut theoretical torque; If the exhaust temperature of six cylinders decreases more than the temperature threshold value, the torque broadcasted externally is the post-fuel-cut theoretical torque.

[0011] Preferably, the temperature threshold value is 5 degrees Celsius.

[0012] Compared with the prior art, the present application has the following advantages: 1. The present application can correct the torque broadcast of the gas engine and broadcast an accurate torque value, so as to facilitate the matching of the automatic gearbox.

[0013] 2. The present application can correct the torque broadcast of the gas engine and broadcast an accurate torque value, thereby reducing the problems of gear shifting jerk and vehicle shaking.

[0014] 3. The gas engine exhaust system and the transient torque broadcast method can be widely applied to gas engines and have a broad application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 FIG. 1 is a schematic diagram of the connection structure of the gas engine exhaust system according to an embodiment of the present application; Figure 2 Signal transmission schematic diagram of the transient torque broadcasting method of the specific embodiment of the present application.

[0016] Wherein: 1. exhaust manifold, 2. one cylinder ignition coil, 3. two cylinder ignition coil, 4. three cylinder ignition coil, 5. intake manifold, 6. intake throttle valve, 7. gas metering valve, 8. intelligent control module, 9. four cylinder ignition coil, 10. five cylinder ignition coil, 11. six cylinder ignition coil, 12. crankshaft speed sensor, 13. six cylinder exhaust temperature sensor, 14. five cylinder exhaust temperature sensor, 15. rear exhaust pressure sensor, 16. four cylinder exhaust temperature sensor, 17. three cylinder exhaust temperature sensor, 18. front exhaust pressure sensor, 19. two cylinder exhaust temperature sensor, 20. one cylinder exhaust temperature sensor, 21. control line DETAILED DESCRIPTION

[0017] The present application will be further illustrated below in conjunction with specific embodiments, which should be understood as merely illustrating the present application and not limiting the scope of the present application. After reading the present application, those skilled in the art can make various modifications to the present application, which all fall within the scope defined by the appended claims.

[0018] The present application claims a gas engine exhaust system, as shown in Figure 1 Fig. 1, comprising an exhaust manifold 1, a one cylinder ignition coil 2, a two cylinder ignition coil 3, a three cylinder ignition coil 4, an intake manifold 5, an intake throttle valve 6, a gas metering valve 7, an intelligent control module 8, a four cylinder ignition coil 9, a five cylinder ignition coil 10, a six cylinder ignition coil 11, a crankshaft speed sensor 12, a six cylinder exhaust temperature sensor 13, a five cylinder exhaust temperature sensor 14, a rear exhaust pressure sensor 15, a four cylinder exhaust temperature sensor 16, a three cylinder exhaust temperature sensor 17, a front exhaust pressure sensor 18, a two cylinder exhaust temperature sensor 19, a one cylinder exhaust temperature sensor 20, a control line 21, wherein: Ignition coils 2 (cylinder 1), 3 (cylinder 2), 4 (cylinder 3), 9 (cylinder 4), 10 (cylinder 5), and 11 (cylinder 6) are respectively installed on the corresponding cylinders above the engine cylinder head; exhaust manifold 1 is installed on the exhaust side of the gas engine cylinder head; exhaust temperature sensor 20 is installed at the cylinder 1 outlet, exhaust temperature sensor 19 at the cylinder 2 outlet, exhaust temperature sensor 17 at the cylinder 3 outlet, exhaust temperature sensor 16 at the cylinder 4 outlet, exhaust temperature sensor 14 at the cylinder 5 outlet, and exhaust temperature sensor 13 at the cylinder 6 outlet; rear exhaust pressure sensor 15 and front exhaust pressure sensor 18 are also installed. The exhaust manifold 1 is installed on both sides; the intake manifold 5 is installed on the intake side of the engine cylinder head; one end of the intake throttle valve 6 is connected to the intake port of the intake manifold 5; one end of the gas metering valve 7 is connected to the intake manifold 5; the crankshaft speed sensor 12 is installed on the outside of the engine crankshaft; the intelligent control module 8 is connected to the exhaust temperature sensor 20 of cylinder 1, the exhaust temperature sensor 19 of cylinder 2, the exhaust temperature sensor 17 of cylinder 3, the exhaust temperature sensor 16 of cylinder 4, the exhaust temperature sensor 14 of cylinder 5, the exhaust temperature sensor 13 of cylinder 6, the exhaust pressure sensor 15 of cylinder 5, the exhaust pressure sensor 18 of cylinder 6, the intake throttle valve 6, the gas metering valve 7, and the crankshaft speed sensor 12 via control line 21.

[0019] A method for reporting transient torque in a gas engine exhaust system, such as... Figure 2 As shown, it includes the following steps: S100. The intelligent control module 8 collects engine exhaust temperature, exhaust pressure, intake throttle valve opening, gas flow, ignition coil ignition signal, and crankshaft speed signal respectively. S200. At the moment of engine refueling, the intelligent control module 8 records the theoretical torque before refueling; S300. The gas supply is controlled by controlling the opening degree of the intake throttle valve 6, and the gas flow rate is measured by the gas metering method; the crankshaft speed sensor 12 is controlled to measure the crankshaft speed. S400. The theoretical torque after refueling is calculated based on the preset initial calibration value; S500. Based on the monitored values ​​of the exhaust temperature of the six cylinders and the exhaust pressure on the corresponding side, the torque is broadcast to the outside according to the preset refueling stage broadcast rules. S600. At the moment the engine reduces fuel consumption, the intelligent control module 8 records the theoretical torque before the fuel reduction. S700. The intake throttle valve 6 is controlled to open to control the gas supply, and the gas flow rate is measured by the gas metering valve 7; the crankshaft speed sensor 12 is controlled to measure the crankshaft speed. S800. Calculate the current reduced fuel theoretical torque according to the initial calibration value; S900. According to the monitoring values of the exhaust temperatures of the six cylinders and the exhaust pressures of the corresponding sides, broadcast the torque externally according to the preset reduced fuel stage broadcast rule.

[0020] It should be noted that the intake throttle valve 6 controls the gas supply according to the equivalent combustion ratio.

[0021] In the specific embodiment, the equivalent combustion ratio is the mass ratio of air and gas, which is 17.2:1.

[0022] It should be noted that the fueling stage broadcast rule is: If the exhaust temperature of one cylinder increases by more than the preset temperature threshold value, and the exhaust pressure of the corresponding side increases, while the temperature change of the remaining cylinders is less than or equal to the temperature threshold value, the torque broadcast externally is five-sixths of the pre-fueling theoretical torque plus one-sixth of the post-fueling theoretical torque; If the exhaust temperature of two cylinders increases by more than the temperature threshold value, and the exhaust pressure of the corresponding side increases, while the temperature change of the remaining cylinders is less than or equal to the temperature threshold value, the torque broadcast externally is four-sixths of the pre-fueling theoretical torque plus two-sixths of the post-fueling theoretical torque; If the exhaust temperature of three cylinders increases by more than the temperature threshold value, and the exhaust pressure of the corresponding side increases, while the temperature change of the remaining cylinders is less than or equal to the temperature threshold value, the torque broadcast externally is three-sixths of the pre-fueling theoretical torque plus three-sixths of the post-fueling theoretical torque; If the exhaust temperature of four cylinders increases by more than the temperature threshold value, and the exhaust pressure of the corresponding side increases, while the temperature change of the remaining cylinders is less than or equal to the temperature threshold value, the torque broadcast externally is two-sixths of the pre-fueling theoretical torque plus four-sixths of the post-fueling theoretical torque; If the exhaust temperature of five cylinders increases by more than the temperature threshold value, and the exhaust pressure of the corresponding side increases, while the temperature change of the remaining cylinders is less than or equal to the temperature threshold value, the torque broadcast externally is one-sixth of the pre-fueling theoretical torque plus five-sixths of the post-fueling theoretical torque; If it is determined that all six cylinders are ignited, and the gas flow is stable, the torque broadcast externally is the post-fueling theoretical torque.

[0023] It should be noted that the reduced fuel stage broadcast rule is: If the exhaust temperature of the six cylinders of the engine changes less than or equal to the temperature threshold value, and the exhaust pressure also does not change, the reduced fuel theoretical torque is broadcast externally; If the exhaust temperature of one cylinder begins to decrease by more than the temperature threshold value, and the exhaust pressure decreases, while the temperature change of the remaining cylinders is less than or equal to the temperature threshold value, the torque broadcast externally is five-sixths of the pre-reduced fuel theoretical torque plus one-sixth of the post-reduced fuel theoretical torque; If the exhaust temperature of two cylinders decreases beyond the temperature threshold value while the exhaust pressure decreases, and the temperature change of the remaining cylinders is less than or equal to the temperature threshold value, the torque is broadcasted as four-sixths of the pre-fuel-cut theoretical torque plus two-sixths of the post-fuel-cut theoretical torque; If the exhaust temperature of three cylinders decreases beyond the temperature threshold value while the exhaust pressure decreases, and the temperature change of the remaining cylinders is less than or equal to the temperature threshold value, the torque is broadcasted as three-sixths of the pre-fuel-cut theoretical torque plus three-sixths of the post-fuel-cut theoretical torque; If the exhaust temperature of four cylinders decreases beyond the temperature threshold value while the exhaust pressure decreases, and the temperature change of the remaining cylinders is less than or equal to the temperature threshold value, the torque is broadcasted as two-sixths of the pre-fuel-cut theoretical torque plus four-sixths of the post-fuel-cut theoretical torque; If the exhaust temperature of five cylinders decreases beyond the temperature threshold value while the exhaust pressure decreases, and the temperature change of the remaining cylinders is less than or equal to the temperature threshold value, the torque is broadcasted as one-sixth of the pre-fuel-cut theoretical torque plus five-sixths of the post-fuel-cut theoretical torque; If the exhaust temperature of six cylinders decreases beyond the temperature threshold value, the torque is broadcasted as the post-fuel-cut theoretical torque.

[0024] In the embodiment, the temperature threshold value is 5 degrees Celsius.

[0025] It should be noted that the initial calibration value is calculated according to the gas flow and engine speed to calibrate the torque, and is obtained through test calibration; the post-fuel-cut theoretical torque and the post-fuel-cut theoretical torque are calibrated according to the engine speed and gas flow on a test bench.

[0026] In the detailed description above, various features are grouped together in single embodiments for the purpose of streamlining the disclosure. This method of disclosure should not be interpreted as reflecting a necessity of more features than are expressly set forth in each claim. Rather, inventive aspects lie in less than all features of a single disclosed embodiment. Thus, the claims following, are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate preferred embodiment. By way of example, an element in one claim can be combined with those of the other subordinate claims to render either more broad or more specific claims. In the event that provisions of 35 U.S.C. § 121 or 365(c) are invoked, the applicant reserves the right to any advantages to be obtained by such provisions.

[0027] The disclosed embodiments are to be considered merely illustrative of the principles of the application, and various modifications can be made by those skilled in the art to the application without departing from the scope and spirit of the application as described. Therefore, the scope of the application is not intended to be limited to the embodiments described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0028] The above description includes examples of one or more embodiments. Of course, not all possible combinations of components or methods described above will be employed to make or use the embodiments nor will all of

[0029] The specific implementation described above, the purpose of the present application, technical solutions and beneficial effects are further detailed, it should be understood that the above described only for the specific embodiments of the present application, and not used to limit the scope of the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included within the scope of the present application.

Claims

1. A gas engine exhaust system, characterized in that: Includes an exhaust manifold (1), a cylinder 1 ignition coil (2), a cylinder 2 ignition coil (3), a cylinder 3 ignition coil (4), an intake manifold (5), an intake throttle valve (6), a gas metering valve (7), an intelligent control module (8), a cylinder 4 ignition coil (9), a cylinder 5 ignition coil (10), a cylinder 6 ignition coil (11), a crankshaft speed sensor (12), a cylinder 6 exhaust temperature sensor (13), a cylinder 5 exhaust temperature sensor (14), a rear exhaust pressure sensor (15), a cylinder 4 exhaust temperature sensor (16), a cylinder 3 exhaust temperature sensor (17), a front exhaust pressure sensor (18), a cylinder 2 exhaust temperature sensor (19), a cylinder 1 exhaust temperature sensor (20), and control lines (21), wherein: The ignition coils (2), (3), (4), (9), (10), and (11) of the first, second, third, fourth, fifth, and sixth cylinders are respectively installed on the corresponding cylinders above the engine cylinder head; the exhaust manifold (1) is installed on the exhaust side of the gas engine cylinder head; the exhaust temperature sensor (20) of the first cylinder is installed at the outlet of the first cylinder, the exhaust temperature sensor (19) of the second cylinder is installed at the outlet of the second cylinder, the exhaust temperature sensor (17) of the third cylinder is installed at the outlet of the third cylinder, the exhaust temperature sensor (16) of the fourth cylinder is installed at the outlet of the fourth cylinder, the exhaust temperature sensor (14) of the fifth cylinder is installed at the outlet of the fifth cylinder, and the exhaust temperature sensor (13) of the sixth cylinder is installed at the outlet of the sixth cylinder; the rear exhaust pressure sensor (15) and the front exhaust pressure sensor (18) are respectively installed on the exhaust manifold. Both sides of the manifold (1); the intake manifold (5) is installed on the intake side of the engine cylinder head; one end of the intake throttle valve (6) is connected to the intake port of the intake manifold (5); one end of the gas metering valve (7) is connected to the intake manifold (5); the crankshaft speed sensor (12) is installed on the outside of the engine crankshaft; the intelligent control module (8) is connected to the exhaust temperature sensor (20) of cylinder 1, the exhaust temperature sensor (19) of cylinder 2, the exhaust temperature sensor (17) of cylinder 3, the exhaust temperature sensor (16) of cylinder 4, the exhaust temperature sensor (14) of cylinder 5, the exhaust temperature sensor (13) of cylinder 6, the exhaust pressure sensor (15) of cylinder 6, the exhaust pressure sensor (18) of cylinder 7, the intake throttle valve (6), the gas metering valve (7), and the crankshaft speed sensor (12) via the control line (21).

2. A method for reporting transient torque in a gas engine exhaust system as described in claim 1, characterized in that: Includes the following steps: S100. Control the intelligent control module (8) to collect engine exhaust temperature, exhaust pressure, intake throttle valve opening, gas flow, ignition coil ignition signal, and crankshaft speed signal respectively; S200. At the moment of engine refueling, control the intelligent control module (8) to record the theoretical torque before refueling; S300. By controlling the opening degree of the intake throttle valve (6), the gas supply is controlled, and the gas flow rate is measured by the gas metering method; the crankshaft speed sensor (12) is controlled to measure the crankshaft speed; S400. The theoretical torque after refueling is calculated based on the preset initial calibration value; S500. Based on the monitored values ​​of the exhaust temperature of the six cylinders and the exhaust pressure on the corresponding side, the torque is broadcast to the outside according to the preset refueling stage broadcast rules. S600. At the moment the engine reduces fuel consumption, the intelligent control module (8) is controlled to record the theoretical torque before fuel reduction; S700. By controlling the opening degree of the intake throttle valve (6), the gas supply is controlled, and the gas flow rate is measured by the gas metering valve (7); the crankshaft speed sensor (12) is controlled to measure the crankshaft speed. S800. Calculate the theoretical torque after reducing oil pressure based on the initial calibration value; S900. Based on the monitored values ​​of the exhaust temperature of the six cylinders and the exhaust pressure on the corresponding side, the torque is broadcast to the outside according to the preset fuel reduction stage broadcast rules.

3. The transient torque reporting method according to claim 2, characterized in that: The intake throttle valve (6) controls the gas supply according to the equivalent combustion ratio.

4. The transient torque reporting method according to claim 3, characterized in that: The equivalent combustion ratio is an air-to-gas mass ratio of 17.2:

1.

5. The transient torque reporting method according to claim 4, characterized in that: The broadcast rules for the refueling phase are as follows: If the exhaust temperature of one cylinder increases beyond a preset temperature threshold, and the exhaust pressure on the corresponding side increases, while the temperature change of the other cylinders is less than or equal to the temperature threshold, then the torque reported externally is five-sixths of the theoretical torque before refueling plus one-sixth of the theoretical torque after refueling. If the exhaust temperature of two cylinders increases beyond the temperature threshold, and the exhaust pressure on the corresponding side increases, while the temperature change of the remaining cylinders is less than or equal to the temperature threshold, then the externally reported torque is four-sixths of the theoretical torque before refueling plus two-sixths of the theoretical torque after refueling. If the exhaust temperature of three cylinders increases beyond the temperature threshold, and the exhaust pressure on the corresponding side increases, while the temperature change of the remaining cylinders is less than or equal to the temperature threshold, then the torque reported externally is three-sixths of the theoretical torque before refueling plus three-sixths of the theoretical torque after refueling. If the exhaust temperature of four cylinders increases beyond the temperature threshold, and the exhaust pressure on the corresponding side increases, while the temperature change of the remaining cylinders is less than or equal to the temperature threshold, then the torque reported externally is two-sixths of the theoretical torque before refueling plus four-sixths of the theoretical torque after refueling. If the exhaust temperature of five cylinders increases beyond the temperature threshold, and the exhaust pressure on the corresponding side increases, while the temperature change of the remaining cylinders is less than or equal to the temperature threshold, then the externally reported torque is one-sixth of the theoretical torque before refueling plus five-sixths of the theoretical torque after refueling. If it is determined that all six cylinders are ignited and the gas flow is stable, the torque reported externally is the theoretical torque after refueling.

6. The transient torque reporting method according to claim 5, characterized in that: The reporting rules for the oil reduction phase are as follows: If the exhaust temperature change of the six cylinders of the engine is less than or equal to the temperature threshold and the exhaust pressure does not change, then the theoretical torque before fuel reduction will be broadcast. If one cylinder begins to experience a decrease in exhaust temperature exceeding the temperature threshold, while the exhaust pressure decreases, and the temperature changes of the remaining cylinders are less than or equal to the temperature threshold, then the externally reported torque is five-sixths of the theoretical torque before fuel reduction plus one-sixth of the theoretical torque after fuel reduction. If the exhaust temperature of two cylinders drops below the temperature threshold and the exhaust pressure decreases, while the temperature change of the remaining cylinders is less than or equal to the temperature threshold, then the reported torque is four-sixths of the theoretical torque before fuel reduction plus two-sixths of the theoretical torque after fuel reduction. If the exhaust temperature of three cylinders drops below the temperature threshold and the exhaust pressure decreases, while the temperature change of the remaining cylinders is less than or equal to the temperature threshold, then the reported torque is three-sixths of the theoretical torque before fuel reduction plus three-sixths of the theoretical torque after fuel reduction. If the exhaust temperature of four cylinders drops below the temperature threshold and the exhaust pressure decreases, while the temperature change of the remaining cylinders is less than or equal to the temperature threshold, then the reported torque is two-sixths of the theoretical torque before fuel reduction plus four-sixths of the theoretical torque after fuel reduction. If the exhaust temperature of five cylinders drops below the temperature threshold and the exhaust pressure decreases, while the temperature change of the remaining cylinders is less than or equal to the temperature threshold, then the reported torque is one-sixth of the theoretical torque before fuel reduction plus five-sixths of the theoretical torque after fuel reduction. If the exhaust temperature of six cylinders drops below the temperature threshold, the torque reported externally will be the theoretical torque after reducing fuel consumption.

7. The transient torque reporting method according to claim 6, characterized in that: The temperature threshold is 5 degrees Celsius.

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