An explosion-proof diesel engine carbon monoxide emission comprehensive control system and method

Abstract

The present application relates to a kind of carbon monoxide emission comprehensive control system and method of explosion-proof diesel engine, its system includes: oxidation catalytic converter is catalytically oxidized to the exhaust gas of explosion-proof diesel engine, output purifying exhaust gas;Carbon monoxide sensor is used to detect the content of carbon monoxide in purifying exhaust gas, and output carbon monoxide content data;Fuel injection control device generates carbon monoxide control signal according to carbon monoxide content data;According to the rotational speed and injection amount of explosion-proof diesel engine, generate boost control signal;Electric supercharger is filtered by air filter under the control of boost control signal to the air of boost;Fuel injection solenoid valve controls the injection advance angle and injection amount of explosion-proof diesel engine according to carbon monoxide control signal;The present application acquires the content of carbon monoxide in exhaust gas by carbon monoxide sensor, and according to the content of carbon monoxide to control injection advance angle and injection amount to reduce the carbon monoxide content of exhaust gas, to ensure that the carbon monoxide in exhaust gas is within the qualified emission value.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of exhaust treatment of explosion-proof diesel engines, and particularly relates to a carbon monoxide emission comprehensive control system and method for explosion-proof diesel engines. BACKGROUND

[0002] Currently, the main power of auxiliary transportation equipment in coal mines is explosion-proof diesel engines. Carbon monoxide gas is generated in the process of working of the explosion-proof diesel engines into the coal mine roadway environment. At present, with the increase of auxiliary transportation equipment in coal mines, and the tightening of monitoring of carbon monoxide in the roadway in coal mines, even if the explosion-proof diesel engine meets the emission indicators, it will cause the carbon monoxide sensor in the coal mine roadway to alarm in some poorly ventilated areas during the driving of the auxiliary transportation equipment in coal mines, thereby affecting the normal mining of the coal mine, especially in the single-track hoist auxiliary transportation equipment driving at low speed or the heavy support carrier driving at a slow speed. It can be seen that the carbon monoxide in the exhaust emission of the existing explosion-proof diesel engine during the working process in the coal mine roadway will exceed the standard, which seriously affects the safety of the staff in the coal mine roadway. SUMMARY

[0003] In order to solve the technical problems in the prior art that the carbon monoxide in the exhaust emission of the existing explosion-proof diesel engine during the working process in the coal mine roadway will exceed the standard, the present application provides a carbon monoxide emission comprehensive control system and method for explosion-proof diesel engines.

[0004] The technical solution of the present application to solve the above technical problems is as follows:

[0005] A carbon monoxide emission comprehensive control system for explosion-proof diesel engines comprises:

[0006] An oxidation catalytic converter connected to the explosion-proof diesel engine, used for catalytically oxidizing the exhaust gas discharged by the explosion-proof diesel engine to remove carbon monoxide in the exhaust gas, thereby outputting purified exhaust gas;

[0007] A carbon monoxide sensor used for detecting the content of carbon monoxide in the purified exhaust gas and outputting carbon monoxide content data;

[0008] A fuel injection control device connected to the carbon monoxide sensor and the electric supercharger, used for generating a carbon monoxide control signal according to the carbon monoxide content data, and generating a supercharging control signal according to the rotational speed and fuel injection amount of the explosion-proof diesel engine;

[0009] An electric supercharger connected to the intake manifold of the explosion-proof diesel engine and controlled by the fuel injection control device, used for supercharging the air filtered by the air filter under the control of the supercharging control signal, and delivering the supercharged air to the intake manifold;

[0010] The oil injection electromagnetic valve is connected with the fuel injection control device and is used for controlling the injection advance angle and the injection amount of the fuel injection nozzle of the explosion-proof diesel engine according to the carbon monoxide control signal.

[0011] The present application has the advantages that the carbon monoxide content in the exhaust gas is collected by the carbon monoxide sensor, and the injection advance angle and the injection amount are controlled according to the carbon monoxide content, so as to reduce the carbon monoxide content in the exhaust gas and ensure that the carbon monoxide in the exhaust gas is within the qualified emission value.

[0012] On the basis of the above technical solution, the present application can be further improved as follows.

[0013] Further, the electric supercharger comprises an electric motor and a compressor, the electric motor drives the compressor to rotate, the air inlet of the compressor is connected with the air filter, the air outlet of the compressor is connected with the intake manifold, and the compressor is used for supercharging the air filtered by the air filter and delivering the supercharged air to the intake manifold.

[0014] The integrated control system further comprises a rotation speed sensor, which is used for collecting the rotation speed of the explosion-proof diesel engine to obtain diesel engine rotation speed data.

[0015] The fuel injection control device is connected with the electric motor and the rotation speed sensor, and is specifically used for generating an electric motor rotation speed control signal according to the diesel engine rotation speed data and the injection amount, and controlling the rotation speed of the electric motor through the electric motor rotation speed control signal, so as to control the air pressure of the air output by the compressor; wherein the supercharging control signal is the electric motor rotation speed control signal.

[0016] Further, the fuel injection control device is specifically used for converting the carbon monoxide content data into a carbon monoxide content value, comparing the difference between the carbon monoxide content value and a preset content value to obtain a comparison result, and generating the carbon monoxide control signal according to the comparison result.

[0017] Further, the fuel injection control device is specifically used for comparing the difference between the carbon monoxide content value and a preset content value, if the carbon monoxide content value is less than or equal to the preset content value, the carbon monoxide control signal is not generated, and if the carbon monoxide content value is greater than the preset content value, the carbon monoxide control signal is generated.

[0018] Further, the carbon monoxide control signal comprises an injection advance angle control signal and an injection amount control signal.

[0019] The fuel injection electromagnetic valve is specifically used for increasing the fuel injection advance angle of the fuel injection nozzle of the explosion-proof diesel engine according to the fuel injection advance angle control signal and decreasing the fuel injection amount of the fuel injection nozzle of the explosion-proof diesel engine according to the fuel injection amount control signal.

[0020] Further, the fuel injection control device is specifically used for generating the fuel injection advance angle adjustment data when the carbon monoxide content value is greater than the preset content value and calculating a fuel injection advance angle increase amount according to the fuel injection advance angle adjustment data.

[0021] If the fuel injection advance angle increase amount is less than or equal to a preset increase amount, the fuel injection advance angle control signal is generated according to the fuel injection advance angle adjustment data.

[0022] If the fuel injection advance angle increase amount is greater than the preset increase amount, the fuel injection advance angle control signal and the fuel injection amount control signal are generated according to the preset increase amount.

[0023] Further, the fuel injection control device is specifically used for collecting a fuel injection decrease amount of the fuel injection nozzle of the explosion-proof diesel engine when the fuel injection advance angle increase amount is greater than the preset increase amount to obtain a fuel injection decrease amount, judging whether the fuel injection decrease amount is less than a preset fuel injection decrease amount, generating the fuel injection amount control signal according to the fuel injection decrease amount if yes, and generating the fuel injection amount control signal according to the preset fuel injection decrease amount if no.

[0024] Further, the fuel injection control device further comprises a throttle pedal sensor for collecting a position signal of a throttle pedal of the explosion-proof diesel engine.

[0025] The fuel injection control device is specifically used for generating a throttle control signal according to the position signal of the throttle pedal when the carbon monoxide content value is less than or equal to the preset content value.

[0026] The fuel injection electromagnetic valve is specifically used for controlling the fuel injection amount of the fuel injection nozzle of the explosion-proof diesel engine according to the throttle control signal.

[0027] Further, the integrated control system further comprises a turbo generator and a storage battery, the turbo generator comprises a turbine and a generator, an air inlet of the turbine is connected to an exhaust manifold of the explosion-proof diesel engine, and an air outlet of the turbine is connected to the oxidation catalytic converter; a rotating shaft of the turbine is connected to a rotating shaft of the generator, the turbine is used for rotating itself to drive the generator to rotate by using the energy of the exhaust gas of the explosion-proof diesel engine, so that the generator generates electricity by using the energy of the exhaust gas of the explosion-proof diesel engine; and the storage battery is connected to the generator to store the electricity generated by the generator.

[0028] The battery is also connected to the fuel injection control device, and the battery is used to supply power to the fuel injection control device.

[0029] To solve the above technical problems, the application also provides a comprehensive control method for carbon monoxide emission of an explosion-proof diesel engine.

[0030] A comprehensive control method for carbon monoxide emission of an explosion-proof diesel engine is applied to the comprehensive control system for carbon monoxide emission of the explosion-proof diesel engine, and includes the following steps.

[0031] S1, using an oxidation catalytic converter to catalytically oxidize the exhaust gas discharged by the explosion-proof diesel engine to remove carbon monoxide in the exhaust gas, thereby outputting purified exhaust gas;

[0032] S2, using a carbon monoxide sensor to detect the content of carbon monoxide in the purified exhaust gas and output carbon monoxide content data;

[0033] S3, using a fuel injection control device to generate a carbon monoxide control signal according to the carbon monoxide content data and a supercharging control signal according to the rotation speed and fuel injection amount of the explosion-proof diesel engine;

[0034] S4, using an electric supercharger to supercharge the air filtered by the air filter under the control of the supercharging control signal, and delivering the supercharged air to the intake manifold;

[0035] S5, using an oil injection electromagnetic valve to control the fuel injection advance angle and fuel injection amount of the fuel injection nozzle of the explosion-proof diesel engine according to the carbon monoxide control signal. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 The figure is a system structure diagram of a comprehensive control system for carbon monoxide emission of an explosion-proof diesel engine in an embodiment of the application;

[0037] Figure 2 The figure is a structure diagram of an oxidation catalytic converter in an embodiment of the application;

[0038] Figure 3 The figure is a flow chart of a comprehensive control method for carbon monoxide emission of an explosion-proof diesel engine in an embodiment of the application.

[0039] In the drawings, the components represented by the numbers are listed as follows:

[0040] 1, shell, 2, waterway, 3, heat insulation layer, 4, exhaust gas treatment cavity, 5, air inlet, 6, catalytic carrier, 7, exhaust gas passing hole, 8, air inlet connecting pipe, 9, air outlet. DETAILED DESCRIPTION

[0041] The principles and features of the present application are described below in conjunction with the accompanying drawings, in which the examples are used to explain the present application and are not intended to limit the scope of the present application.

[0042] As shown in Figure 1 The present embodiment provides a comprehensive control system for carbon monoxide emission of an explosion-proof diesel engine, comprising:

[0043] An oxidation catalytic converter connected to the explosion-proof diesel engine, for catalytic oxidation treatment of exhaust gas discharged by the explosion-proof diesel engine to remove carbon monoxide in the exhaust gas, thereby outputting purified exhaust gas;

[0044] A carbon monoxide sensor for detecting the content of carbon monoxide in the purified exhaust gas and outputting carbon monoxide content data;

[0045] A fuel injection control device connected to the carbon monoxide sensor and the electric supercharger, for generating a carbon monoxide control signal according to the carbon monoxide content data; and generating a supercharging control signal according to the rotational speed and fuel injection amount of the explosion-proof diesel engine;

[0046] An electric supercharger connected to the intake manifold of the explosion-proof diesel engine and controlled by the fuel injection control device, for supercharging air filtered by the air filter under the control of the supercharging control signal and delivering the supercharged air to the intake manifold;

[0047] A fuel injection electromagnetic valve connected to the fuel injection control device, for controlling the fuel injection advance angle and fuel injection amount of the fuel injection nozzle of the explosion-proof diesel engine according to the carbon monoxide control signal.

[0048] The present embodiment collects the content of carbon monoxide in the exhaust gas through the carbon monoxide sensor, and controls the fuel injection advance angle and fuel injection amount according to the content of carbon monoxide, so as to reduce the content of carbon monoxide in the exhaust gas and ensure that the carbon monoxide in the exhaust gas is within the qualified emission value.

[0049] In some embodiments, the electric supercharger comprises an electric motor and a compressor, the electric motor drives the compressor to rotate, the air inlet of the compressor is connected to the air filter, the air outlet of the compressor is connected to the intake manifold, and the compressor is used to supercharge the air filtered by the air filter and deliver the supercharged air to the intake manifold;

[0050] The comprehensive control system further comprises a rotational speed sensor for collecting the rotational speed of the explosion-proof diesel engine and obtaining diesel engine rotational speed data;

[0051] The fuel injection control device is connected with the motor and the rotation speed sensor, and is specifically used for generating a motor rotation speed control signal according to the diesel engine rotation speed data and the fuel injection amount, and controlling the rotation speed of the motor through the motor rotation speed control signal, so as to control the air pressure of the air output by the compressor; wherein the supercharging control signal is the motor rotation speed control signal.

[0052] The compressor and the turbine of the original turbocharging system are separated, and the compressor is independently driven by a direct current motor to perform supercharging. The specific measures are as follows: the rotation speed of the direct current motor driving the compressor is controlled by a fuel injection control host of the explosion-proof diesel engine, the host has a diesel engine controller, and the direct current motor is driven to rotate through the output PWM signal, so as to drive the compressor impeller to rotate. The target rotation speed of the direct current motor is inquired from a direct current motor rotation speed table built in the controller, and the relationship between the rotation speed of the direct current motor, the rotation speed of the engine and the single injection amount of the diesel engine single cylinder is as shown in Table 1:

[0053] Table 1: Direct current motor rotation speed mapping table

[0054]

[0055] Table 2: Direct current motor rotation speed and PWM duty cycle mapping table

[0056]

[0057] In Table 1, the first row represents the engine rotation speed unit in rpm, the first column represents the single injection amount of the diesel engine single cylinder unit in mg, and the remaining part is the direct current motor target rotation speed inquired according to the engine rotation speed and the single injection amount. In Table 2, the first row represents the engine rotation speed unit in rpm, and the second row is the PWM, i.e. the duty cycle unit in %. When the explosion-proof diesel engine is running, the controller obtains the direct current motor target rotation speed by internal table lookup, and then inquires the PWM duty cycle from the direct current motor rotation speed and PWM duty cycle mapping table. The controller drives the direct current motor to rotate according to the inquired duty cycle signal. At the same time, the controller can monitor the running state of the direct current motor and issue an alarm when an abnormality is detected, thereby improving the reliability and safety of the electric control supercharging system.

[0058] In this embodiment, the exhaust gas turbocharger is replaced by an electric supercharger, and the rotation speed of the control motor of the electric supercharger is controlled according to the rotation speed of the explosion-proof diesel engine, so as to control the pressure increment of the intake air of the explosion-proof diesel engine. By controlling the rotation speed of the electric supercharger, the supercharging pressure is flexibly adjusted, the response speed is improved, and in particular, the supercharging pressure at low speed can be increased, and the carbon monoxide emission of the explosion-proof diesel engine during low speed and large torque working condition is reduced.

[0059] In some embodiments, the fuel injection control device is specifically configured to convert the carbon monoxide content data into a carbon monoxide content value; compare the difference between the carbon monoxide content value and a preset content value to obtain a comparison result, and generate the carbon monoxide control signal according to the comparison result.

[0060] Specifically, the fuel injection control device is specifically configured to compare the difference between the carbon monoxide content value and a preset content value, if the carbon monoxide content value is less than or equal to the preset content value, the carbon monoxide control signal is not generated; if the carbon monoxide content value is greater than the preset content value, the carbon monoxide control signal is generated.

[0061] The present embodiment controls the injection advance angle and the injection quantity by the difference between the carbon monoxide content value in the exhaust gas and the preset content value, realizes the feedback control of the carbon monoxide content value in the exhaust gas, and reduces the content of carbon monoxide in the exhaust gas.

[0062] In some embodiments, the carbon monoxide control signal includes an injection advance angle control signal and an injection quantity control signal.

[0063] The injection electromagnetic valve is specifically configured to increase the injection advance angle of the injection nozzle of the explosion-proof diesel engine according to the injection advance angle control signal, and reduce the injection quantity of the injection nozzle of the explosion-proof diesel engine according to the injection quantity control signal.

[0064] Specifically, the fuel injection control device is specifically configured to generate the injection advance angle adjustment data when the carbon monoxide content value is greater than the preset content value, and calculate an injection advance angle increase amount according to the injection advance angle adjustment data.

[0065] If the injection advance angle increase amount is less than or equal to a preset increase amount, the injection advance angle control signal is generated according to the injection advance angle adjustment data;

[0066] If the injection advance angle increase amount is greater than the preset increase amount, the injection advance angle control signal and the injection quantity control signal are generated according to the preset increase amount.

[0067] The embodiment detects the carbon monoxide emission concentration in the exhaust pipe after the oxidation catalytic converter through a carbon monoxide sensor, and then performs the following judgment and control: when the carbon monoxide emission value is greater than the carbon monoxide emission limit value, the carbon monoxide emission is first reduced by increasing the fuel injection advance angle, but the total fuel injection advance angle increment cannot be greater than a certain limit value; when the fuel injection advance angle is increased to the maximum value and the carbon monoxide emission is still over the limit, the carbon monoxide emission is reduced by increasing the fuel injection pressure, but the increase of the fuel injection pressure cannot exceed a certain limit value; when the fuel injection pressure is increased to the maximum value and the carbon monoxide emission is still over the limit, the carbon monoxide emission is reduced by reducing the cycle fuel injection amount, and the cycle fuel injection amount is continuously reduced until the carbon monoxide emission value of the diesel engine exhaust after the oxidation catalytic converter is not over the limit.

[0068] In some embodiments, the fuel injection control device is specifically configured to collect a reduction amount of the fuel injection amount of the fuel injection nozzle of the explosion-proof diesel engine when the fuel injection advance angle increase amount is greater than the preset increase amount, to obtain a fuel injection reduction amount; determine whether the fuel injection reduction amount is less than a preset fuel injection reduction amount, if yes, generate the fuel injection amount control signal according to the fuel injection reduction amount, and if no, generate the fuel injection amount control signal according to the preset fuel injection reduction amount.

[0069] The embodiment limits the fuel injection advance angle increase amount, and after the fuel injection advance angle cannot be increased, the fuel injection amount is reduced to reduce the carbon monoxide content in the exhaust gas. At the same time, the reduction amount of the fuel injection amount is limited to ensure the basic fuel injection amount.

[0070] In some embodiments, it further includes a throttle pedal sensor, a common rail pressure sensor, and a fuel metering valve, the throttle pedal sensor is used to collect the position signal of the throttle pedal of the explosion-proof diesel engine;

[0071] The fuel injection control device is further specifically configured to generate a throttle control signal according to the position signal of the throttle pedal when the carbon monoxide content value is less than or equal to the preset content value;

[0072] The fuel injection electromagnetic valve is further specifically configured to control the fuel injection amount of the fuel injection nozzle of the explosion-proof diesel engine according to the throttle control signal;

[0073] The common rail pressure sensor is used to collect the fuel pressure in the high-pressure oil rail of the explosion-proof diesel engine to obtain oil pressure data;

[0074] The fuel injection control device is further specifically configured to generate an oil pressure control signal according to the oil pressure data;

[0075] The fuel metering valve is used to adjust the fuel pressure of the explosion-proof diesel according to the oil pressure control signal.

[0076] In some embodiments, the cooling water temperature sensor is further configured to collect a cooling water temperature of the anti-knock diesel engine, and obtain a cooling water temperature value; and the fuel injection control device is further configured to generate the fuel injection amount control signal when the cooling water temperature value exceeds a preset cooling water temperature value.

[0077] In the embodiment, when the cooling water temperature exceeds the preset value, the fuel injection amount control signal is directly generated to reduce the fuel injection amount through the fuel injection amount control signal, so as to reduce the heat generation of the anti-knock diesel engine and prevent the anti-knock diesel engine from overheating.

[0078] In some embodiments, the integrated control system further comprises a turbine generator and a storage battery, the turbine generator comprises a turbine and a generator, an air inlet of the turbine is connected to an exhaust manifold of the anti-knock diesel engine, and an air outlet of the turbine is connected to the oxidation catalytic converter; a rotating shaft of the turbine is connected to a rotating shaft of the generator, the turbine is configured to rotate by itself to drive the generator to rotate by using the energy of the exhaust gas of the anti-knock diesel engine, so as to make the generator generate electricity by using the energy of the exhaust gas of the anti-knock diesel engine; and the storage battery is connected to the generator, and the electricity generated by the generator is stored in the storage battery.

[0079] The storage battery is connected to a power input end of the fuel injection control device, and the storage battery supplies power to the fuel injection control device; and the rotating speed sensor, the carbon monoxide sensor, and the accelerator pedal sensor are powered by the fuel injection control device.

[0080] In the embodiment, the turbine driven by the exhaust gas drives the generator to generate electricity, and the generated electricity is stored in the storage battery, so as to provide power voltage for the rotating speed sensor, the common rail pressure sensor, the accelerator pedal sensor, the cooling water temperature sensor, the fuel injection control device, the fuel injection electromagnetic valve, and the fuel metering valve by using the electricity in the storage battery, so as to realize energy recycling of the diesel engine.

[0081] As Figure 2As shown, the oxidation type catalytic converter comprises a main body with a hollow structure inside, which is covered with a heat insulation layer 3 and an outer shell 1 in sequence, the outer shell 1 is fixedly provided with an air inlet connecting pipe 8, and the outer shell 1 is also provided with an air outlet 9; the heat insulation layer 3 and the outer shell 1 form a closed hollow water channel 2, a plurality of independent tail gas treatment cavities 4 are arranged in the internal cavity of the main body in sequence, the internal cavity of the main body is divided by a plurality of partitions, each tail gas treatment cavity 4 is provided with an air inlet 5 and a tail gas passing hole 7, the plurality of tail gas treatment cavities 4 are communicated in sequence, the tail gas passing hole 7 of the upper tail gas treatment cavity 4 and the air inlet 5 of the lower tail gas treatment cavity 4 are communicated in the two adjacent tail gas treatment cavities 4; in the plurality of tail gas treatment cavities 4 communicated in sequence, the air inlet 5 of the tail gas treatment cavity 4 at the first end is connected with the air inlet connecting pipe 8, and the tail gas passing hole 7 of the tail gas treatment cavity 4 at the last end is connected with the air outlet 9; a catalytic carrier 6 is fixedly arranged in each tail gas treatment cavity 4; the catalytic carrier 6 has a honeycomb hollow structure; the air outlet 9 is the outlet of the oxidation catalytic converter, each tail gas treatment cavity 4 has a rectangular structure, and the air inlet 5 and the tail gas passing hole 7 on each tail gas treatment cavity 4 are respectively distributed at opposite corners of the tail gas treatment cavity 4; the water channel 2 is used for cooling the oxidation catalytic converter by cooling water, and the heat insulation layer 3 is used for heat preservation of the tail gas entering the internal cavity of the main body from the air inlet connecting pipe 8, so as to improve the catalytic oxidation efficiency. By arranging the catalytic carrier 6 in the plurality of tail gas treatment cavities 4 communicated in sequence, the carbon monoxide gas in the tail gas can be gradually catalytically oxidized by the plurality of catalytic carriers 6, so as to reduce the content of carbon monoxide gas in the tail gas and prevent the carbon monoxide in the tail gas from exceeding the standard due to incomplete catalytic oxidation. The catalytic carrier 6 is attached with a catalyst, and the tail gas performs catalytic oxidation reaction with the catalyst attached to the catalytic carrier 6 when passing through the tail gas treatment cavity 4, so as to remove the carbon monoxide in the tail gas. Meanwhile, each catalytic carrier 6 can carry different catalysts to remove the polluted gas in the tail gas as needed.

[0082] As Figure 3 shown, in some other embodiments, a comprehensive control method for carbon monoxide emission of an explosion-proof diesel engine is also provided, which is applied to the comprehensive control system for carbon monoxide emission of the explosion-proof diesel engine and comprises the following steps:

[0083] S1, catalytically oxidizing the tail gas discharged by the explosion-proof diesel engine by using the oxidation catalytic converter to remove the carbon monoxide in the tail gas, so as to output purified tail gas;

[0084] S2, detecting the content of carbon monoxide in the purified tail gas by using a carbon monoxide sensor and outputting carbon monoxide content data;

[0085] S3, generating a carbon monoxide control signal according to the carbon monoxide content data and generating a supercharging control signal according to the rotation speed and fuel injection amount of the explosion-proof diesel engine by using a fuel injection control device.

[0086] S4, boosting the air filtered by the air filter under the control of the supercharging control signal by using an electric supercharger, and delivering the boosted air to the intake manifold;

[0087] S5, controlling the injection advance angle and the injection amount of the injection nozzle of the anti-knock diesel engine according to the carbon monoxide control signal by using an injection electromagnetic valve.

[0088] In some other embodiments, an anti-knock diesel engine control system is also provided, which comprises a plurality of sub-control systems, at least one of the sub-control systems being the carbon monoxide emission comprehensive control system of the anti-knock diesel engine.

[0089] The above description is merely preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A comprehensive control system for carbon monoxide emission of an anti-knock diesel engine, characterized by comprising: The application relates to a comprehensive control system of an explosion-proof diesel engine. The comprehensive control system comprises an oxidation catalytic converter connected with the explosion-proof diesel engine, which is used for catalytically oxidizing exhaust gas discharged by the explosion-proof diesel engine to remove carbon monoxide in the exhaust gas, so as to output purified exhaust gas; a carbon monoxide sensor used for detecting the content of carbon monoxide in the purified exhaust gas and outputting carbon monoxide content data; a fuel injection control device connected with the carbon monoxide sensor and an electric supercharger, which is used for generating a carbon monoxide control signal according to the carbon monoxide content data, generating a supercharging control signal according to the rotating speed and fuel injection amount of the explosion-proof diesel engine; an electric supercharger connected with an air intake manifold of the explosion-proof diesel engine and controlled by the fuel injection control device, which is used for supercharging air filtered by an air filter and delivering the supercharged air to the air intake manifold under the control of the supercharging control signal; and a fuel injection electromagnetic valve connected with the fuel injection control device, which is used for controlling the fuel injection advance angle and fuel injection amount of an injection nozzle of the explosion-proof diesel engine according to the carbon monoxide control signal. The electric supercharger comprises an electric motor and a compressor, the electric motor drives the compressor to rotate, the air inlet of the compressor is connected with the air filter, the air outlet of the compressor is connected with the air intake manifold, and the compressor is used for supercharging the air filtered by the air filter and delivering the supercharged air to the air intake manifold. The comprehensive control system further comprises a rotating speed sensor used for collecting the rotating speed of the explosion-proof diesel engine and obtaining diesel engine rotating speed data. The fuel injection control device is connected with the electric motor and the rotating speed sensor, and is specifically used for generating an electric motor rotating speed control signal according to the diesel engine rotating speed data and the fuel injection amount, and controlling the rotating speed of the electric motor through the electric motor rotating speed control signal to control the air pressure of the air output by the compressor; wherein the supercharging control signal is the electric motor rotating speed control signal. The fuel injection control device is specifically used for converting the carbon monoxide content data into a carbon monoxide content value, comparing the difference between the carbon monoxide content value and a preset content value to obtain a comparison result, and generating the carbon monoxide control signal according to the comparison result.

2. The integrated control system for preventing explosion of carbon monoxide exhaust gas of a diesel engine according to claim 1, characterized by The fuel injection control device is specifically used for comparing the difference between the carbon monoxide content value and the preset content value, if the carbon monoxide content value is less than or equal to the preset content value, the carbon monoxide control signal is not generated, and if the carbon monoxide content value is greater than the preset content value, the carbon monoxide control signal is generated. The carbon monoxide control signal comprises a fuel injection advance angle control signal and a fuel injection amount control signal. The fuel injection electromagnetic valve is specifically used for increasing the fuel injection advance angle of the injection nozzle of the explosion-proof diesel engine according to the fuel injection advance angle control signal and reducing the fuel injection amount of the injection nozzle of the explosion-proof diesel engine according to the fuel injection amount control signal.

3. The integrated control system for carbon monoxide emission of an anti-knock diesel engine according to claim 2, characterized by The fuel injection control device is specifically used for generating fuel injection advance angle adjustment data when the carbon monoxide content value is greater than the preset content value, and calculating the fuel injection advance angle increase amount according to the fuel injection advance angle adjustment data.

4. The integrated control system for carbon monoxide emission of the anti-knock diesel engine according to claim 3, characterized by ​ 5. The integrated control system for carbon monoxide emission of an anti-knock diesel engine according to claim 4, characterized by ​ ​ 6. The integrated control system for carbon monoxide emission of the anti-knock diesel engine according to claim 5, characterized by ​ If the injection advance angle increase amount is less than or equal to a preset increase amount, the injection advance angle control signal is generated according to the injection advance angle adjustment data; If the injection advance angle increase amount is greater than the preset increase amount, the injection advance angle control signal and the injection amount control signal are generated according to the preset increase amount.

7. The integrated control system for carbon monoxide emission of an anti-knock diesel engine according to claim 6, characterized by The fuel injection control device is specifically configured to, when the injection advance angle increase amount is greater than the preset increase amount, collect a reduction amount of the injection amount of the injection nozzle of the explosion-proof diesel engine to obtain an injection reduction amount; and determine whether the injection reduction amount is less than a preset injection reduction amount, if yes, generate the injection amount control signal according to the injection reduction amount, and if no, generate the injection amount control signal according to the preset injection reduction amount.

8. The integrated control system for carbon monoxide emission of the anti-knock diesel engine according to claim 4, characterized by The fuel injection control device further comprises a throttle pedal sensor configured to collect a position signal of a throttle pedal of the explosion-proof diesel engine. The fuel injection control device is further specifically configured to, when the carbon monoxide content value is less than or equal to the preset content value, generate a throttle control signal according to the position signal of the throttle pedal. The fuel injection control device is further specifically configured to, when the carbon monoxide content value is less than or equal to the preset content value, generate a throttle control signal according to the position signal of the throttle pedal.

9. The integrated control system for carbon monoxide emission of an anti-knock diesel engine according to claim 8, characterized by The fuel injection electromagnetic valve is further specifically configured to control the injection amount of the injection nozzle of the explosion-proof diesel engine according to the throttle control signal. The integrated control system further comprises a turbo generator and a storage battery, the turbo generator comprises a turbine and a generator, an air inlet of the turbine is connected to an exhaust manifold of the explosion-proof diesel engine, and an air outlet of the turbine is connected to the oxidation catalytic converter; a rotating shaft of the turbine is connected to a rotating shaft of the generator, the turbine is configured to rotate by itself to drive the generator to rotate by using the energy of the exhaust gas of the explosion-proof diesel engine, so that the generator generates electricity by using the energy of the exhaust gas of the explosion-proof diesel engine; and the storage battery is connected to the generator to store the electricity generated by the generator.

10. A comprehensive control method for carbon monoxide emission of an anti-knock diesel engine, characterized by, The storage battery is further connected to the fuel injection control device, and the storage battery is configured to supply power to the fuel injection control device. The integrated control system is applied to the explosion-proof diesel engine carbon monoxide emission integrated control system according to any one of claims 1 to 9, and comprises the following steps: S1, using the oxidation catalytic converter to catalytically oxidize the exhaust gas discharged by the explosion-proof diesel engine to remove carbon monoxide in the exhaust gas, thereby outputting purified exhaust gas; S2, using the carbon monoxide sensor to detect the content of carbon monoxide in the purified exhaust gas and output carbon monoxide content data; S3, using the fuel injection control device to generate a carbon monoxide control signal according to the carbon monoxide content data and a supercharging control signal according to the rotation speed and injection amount of the explosion-proof diesel engine; S4, using the electric supercharger to supercharge the air filtered by the air filter under the control of the supercharging control signal, and delivering the supercharged air to the intake manifold; S5, using the fuel injection electromagnetic valve to control the injection advance angle and injection amount of the injection nozzle of the explosion-proof diesel engine according to the carbon monoxide control signal.

Images