An excavator air intake system and control method

Abstract

The present application relates to the field of excavator air intake technology, in particular to an excavator air intake system and control method. The present application detects the air intake temperature and air intake amount of the excavator through a sensor module, and can determine the air intake state of the excavator according to the air intake temperature and air intake amount. When the air intake state is abnormal, the oxygen and hydrogen in the oxygen tank and hydrogen tank can be used to adjust the air intake state, thereby optimizing the air intake temperature and air intake amount to optimize the engine performance. Moreover, the oxygen and hydrogen in the oxygen tank and hydrogen tank are collected by an electrolytic water device, which is driven by a storage battery. The integrated power generation module of the present application can generate electricity using tail gas heat and store the electricity in the storage battery to realize the recycling of tail gas heat. If the battery power is less than 30%, the generator charges the storage battery under the action of the controller.

Description

Technical Field

[0001] This invention relates to the field of excavator air intake technology, specifically to an excavator air intake system and control method. Background Technology

[0002] With increasing emphasis on exhaust emissions, the requirements for exhaust gas treatment quality are also rising. Commonly used aftertreatment systems employ diesel oxidation catalysts (DOCs) and diesel particulate filters (DPFs), both of which are widely applied. However, aftertreatment systems only address the symptoms, not the root cause. If the intake system has issues such as insufficient air intake or high intake temperature, carbon particles, CO, and NO will be released during fuel combustion. X Increased emissions may reduce engine performance after combustion and also result in residual harmful exhaust gases being released into the atmosphere. Summary of the Invention

[0003] This invention provides an excavator air intake system and control method. The air intake status of the excavator can be determined based on the air intake temperature and air intake volume. When the air intake status is abnormal, the oxygen and hydrogen in the oxygen tank and hydrogen tank can be used to adjust the air intake status, improve the combustion reaction efficiency, reduce the emission of harmful substances in the exhaust gas, and at the same time use the heat energy of the excavator's exhaust gas to generate electrical energy for the battery, thereby achieving the purpose of energy saving and emission reduction.

[0004] In a first aspect, the present invention provides an excavator air intake system, comprising: A heat collection and heating module is installed at the excavator's exhaust pipe to generate electricity using the heat from the exhaust gas and store the electricity in a battery. An electrolysis water device used to generate oxygen and hydrogen by electrolyzing water using a storage battery; Oxygen and hydrogen tanks are used to store the oxygen and hydrogen generated by the water electrolysis device. The oxygen and hydrogen in the oxygen and hydrogen tanks can be heated or cooled and then sent into the air intake manifold of the excavator. The sensor module is used to detect the intake air temperature and intake air volume in the intake manifold; The air intake status of the excavator can be determined based on the air intake temperature and air intake volume. When the air intake status is abnormal, the oxygen and hydrogen in the oxygen tank and hydrogen tank can be used to adjust the air intake status of the excavator.

[0005] Optionally, the battery charge needs to be maintained above a preset charge level. When the battery charge is below the preset charge level, the battery is charged by the generator of the excavator's power system or by an external power source.

[0006] Optionally, the amount of gas in the oxygen tank and hydrogen tank needs to be maintained above the preset capacity. When the amount of gas in the oxygen tank and hydrogen tank is lower than the preset capacity, the water electrolysis device continues to operate to replenish the oxygen tank and hydrogen tank. If the electrolysis device is still operating but it is still difficult to replenish the oxygen tank and hydrogen tank to above the preset capacity, the spare oxygen tank and spare hydrogen tank shall be used to replenish the oxygen tank and hydrogen tank respectively. If the gas levels in the backup oxygen and hydrogen tanks also drop below the preset capacity, the excavator's instrument panel will issue an alarm prompting for gas replenishment.

[0007] Optionally, it also includes: The oxygen heater and the hydrogen heater are located downstream of the oxygen tank and the hydrogen tank, respectively; The hydrogen-oxygen combustion chamber is connected to the oxygen heater and the hydrogen heater via a heating solenoid valve. When the heating solenoid valve is open, the hydrogen and oxygen in the oxygen heater and the hydrogen heater can be burned in the hydrogen-oxygen combustion chamber to heat the gas passing through the oxygen heater and the hydrogen heater.

[0008] Optionally, it also includes: An oxygen cooler is connected to the flow channel between an oxygen tank and an oxygen heater. The oxygen cooler is connected to an oxygen cooling solenoid valve. When the oxygen cooling solenoid valve is opened, the oxygen in the oxygen tank can be cooled by the oxygen cooler. A hydrogen cooler is connected to the flow channel between the hydrogen tank and the hydrogen heater. The hydrogen cooler is connected to a hydrogen cooling solenoid valve. When the hydrogen cooling solenoid valve is opened, the hydrogen in the hydrogen tank can be cooled by passing through the hydrogen cooler.

[0009] Optionally, the heat collection module includes a semiconductor thermoelectric generator.

[0010] Secondly, the present invention provides a control method for an excavator air intake system, which utilizes the excavator air intake system for operation, the control method comprising: The air intake status of the excavator is determined based on the air intake temperature and air intake volume. When the air intake is abnormal, the oxygen and hydrogen in the oxygen and hydrogen tanks are used to adjust the air intake of the excavator.

[0011] Optionally, determining the excavator's air intake status based on the air intake temperature and air intake volume includes: When the intake air temperature is lower than the lower limit of normal temperature, it is judged as low temperature; when it is higher than the upper limit of normal temperature, it is judged as high temperature; otherwise, it is judged as normal temperature. The excess air coefficient is determined based on the ratio of the intake air volume to the theoretical air volume. If the excess air coefficient is less than the lower limit of the optimal range, it is judged as hypoxia; if it is greater than the upper limit of the optimal range, it is judged as oxygen-rich; otherwise, it is judged as normal oxygen. All intake conditions other than normal temperature and normal oxygen are considered abnormal intake conditions.

[0012] Optionally, when the air intake condition is abnormal, the air intake condition of the excavator can be adjusted using the oxygen and hydrogen in the oxygen and hydrogen tanks, including: When the intake state is high temperature and oxygen enrichment, the amount of excess oxygen gas V1 is calculated based on the intake volume and the theoretical air volume. The valve of the hydrogen tank is opened to spray hydrogen gas. The amount of hydrogen gas sprayed out is 2*V1. The hydrogen gas sprayed out of the hydrogen tank is cooled to temperature T1 by the hydrogen cooler and then sprayed into the intake manifold. The hydrogen gas with temperature T1 and a gas volume of 2*V1 mixes with the air with temperature T2 in the intake manifold, which can make the intake temperature reach the optimal intake temperature T. When the intake state is high temperature and oxygen deficiency, the amount of gas V2 that is less oxygen is calculated based on the intake volume and the theoretical air volume. The valve of the oxygen tank is opened to spray oxygen. The amount of oxygen sprayed is V2. The oxygen sprayed from the oxygen tank is cooled to temperature T3 by the oxygen cooler and then injected into the intake manifold. The oxygen at temperature T3 and the amount of gas V2 mixes with the air at temperature T4 in the intake manifold, which can make the intake temperature reach the optimal intake temperature T. When the intake state is low temperature and oxygen deficiency, the amount of gas that is less than oxygen V3 is calculated based on the intake volume and the theoretical air volume. The valves of the oxygen tank and the hydrogen tank are opened to spray oxygen and hydrogen respectively. The amount of oxygen sprayed is V3 + V4, and the amount of hydrogen sprayed is 2 * V4. The oxygen gas of volume V4 and the hydrogen gas of volume 2 * V4 are burned in the hydrogen-oxygen combustion chamber. The heat generated by the combustion in the hydrogen-oxygen combustion chamber heats the oxygen gas of volume V3 in the oxygen heater to temperature T5 and then sprays it into the intake manifold. The oxygen gas of temperature T5 and volume V3 mixes with the air of temperature T6 in the intake manifold to achieve the optimal intake temperature T. When the intake state is low temperature and oxygen enrichment, the amount of excess oxygen gas V5 is calculated based on the intake volume and the theoretical air volume. The valve of the hydrogen tank is opened to spray out hydrogen gas. The amount of hydrogen gas sprayed out is 2*V5. After being cooled to temperature T7 by the hydrogen cooler, the sprayed hydrogen gas is injected into the intake manifold. The hydrogen gas with temperature T7 and a gas volume of 2*V5 mixes with the air in the intake manifold with temperature T8, which can make the intake temperature reach the optimal intake temperature T. When the intake air condition is low temperature and normal oxygen, the valves of the oxygen and hydrogen cylinders are opened to inject oxygen and hydrogen respectively, with the injected oxygen and hydrogen gas volumes being 1:2. This allows the preset ratio of oxygen and hydrogen to enter the hydrogen-oxygen combustion chamber for combustion. The heat released from combustion heats the remaining oxygen-hydrogen mixture to T9 before it is injected into the intake manifold. The remaining oxygen-hydrogen mixture at temperature T9 and the temperature T in the intake manifold are... 10 The air mixture can achieve the optimal intake temperature T; When the intake air condition is high temperature and normal oxygen, open the valves of the oxygen tank and hydrogen tank to spray oxygen and hydrogen respectively. The ratio of oxygen to hydrogen sprayed is 1:2, so that the preset ratio of oxygen and hydrogen enters the hydrogen cooler and oxygen cooler respectively to be cooled to temperature T. 11 The cooled hydrogen-oxygen mixture is then injected into the intake manifold at a temperature T. 11 The oxygen-hydrogen mixture and the temperature T in the intake manifold 12 The air mixture can achieve the optimal intake temperature T; When the intake state is room temperature and oxygen-enriched, the amount of excess oxygen gas V6 is calculated based on the intake volume and the theoretical air volume. The hydrogen gas is sprayed directly into the intake manifold by opening the valve of the hydrogen tank. The amount of hydrogen gas sprayed is 2*V6. When the intake state is normal temperature and oxygen deficiency, the amount of gas V7 that is less oxygen is calculated based on the intake volume and the theoretical air volume. When the valve of the oxygen tank is opened, oxygen is sprayed directly into the intake manifold, and the amount of oxygen sprayed is V7.

[0013] Optionally, the sensor module is also used to detect the concentration of carbon pollutants and nitrogen pollutants in the excavator; If the concentration of the carbon pollutants exceeds the standard, the intake state is determined to be low temperature and oxygen deficiency. If the concentration of the nitrogen pollutant exceeds the standard, the intake air condition is determined to be high temperature and oxygen enrichment. Determining the intake status based on carbon pollutant concentration and nitrogen pollutant concentration has a higher priority than determining the intake status based on intake temperature and intake volume. When the carbon pollutant concentration exceeds the standard and the intake state is determined to be low temperature and oxygen deficiency, the amount of gas V8 that should be released less oxygen is determined based on the carbon pollutant concentration. The valves of the oxygen and hydrogen tanks are opened to release oxygen and hydrogen respectively. The amount of oxygen released is V8 + V9, and the amount of hydrogen released is 2 * V9. The oxygen in volume V9 and the hydrogen in volume 2 * V9 burn in the oxygen-hydrogen combustion chamber. The heat generated by the combustion in the oxygen-hydrogen combustion chamber heats the oxygen in volume V8 in the oxygen heater to temperature T. 13 It is then injected into the intake manifold at a temperature T. 13 And the oxygen gas volume is V8 and the temperature T in the intake manifold 14 The air mixture can bring the intake air temperature to the optimal temperature T. When the nitrogen pollutant concentration exceeds the standard and the intake air condition is determined to be high-temperature oxygen-enriched, the excess oxygen gas volume V9 is calculated based on the nitrogen pollutant concentration. The valve of the hydrogen tank is then opened to release hydrogen gas, with the released volume being 2*V9. The hydrogen gas released from the hydrogen tank is cooled to temperature T by a hydrogen cooler. 15 It is then injected into the intake manifold at a temperature T. 15 And the amount of hydrogen gas is 2*V9 and the temperature T in the intake manifold is... 16 After mixing with the air, the intake temperature can reach the optimal intake temperature T.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This invention uses a sensor module to detect the intake temperature and volume of the excavator's intake manifold. Based on these parameters, the excavator's intake status can be determined. When the intake status is abnormal, the oxygen and hydrogen in the oxygen and hydrogen tanks can be used to adjust the intake status, thereby optimizing the intake temperature and volume to improve engine performance. Furthermore, the oxygen and hydrogen in the oxygen and hydrogen tanks are collected through a water electrolysis device powered by a battery. The integrated power generation module of this invention can generate electricity using exhaust heat and store the electricity in the battery, thus achieving the recovery and utilization of exhaust heat. Attached Figure Description

[0015] Figure 1 This is a structural diagram of the intake system according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the working principle of the thermal power generation module according to an embodiment of the present invention; Figure 3 This is a working logic diagram of the water electrolysis device according to an embodiment of the present invention; Figure 4 This is a control logic diagram of the intake system according to an embodiment of the present invention.

[0016] Numbering on the map: 1. Cylinder; 2. Turbocharger; 3. Exhaust pipe; 4. Thermal power generation module; 5. Water electrolysis device; 51. Battery; 52. Generator; 6. Oxygen tank; 61. Backup oxygen tank; 7. Hydrogen tank; 71. Backup hydrogen tank; 8. Oxygen cooler; 9. Hydrogen cooler; 10. Oxygen heater; 11. Hydrogen heater; 12. Hydrogen-oxygen combustion chamber. Detailed Implementation

[0017] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. In the description of this invention, it should be noted that, 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 will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0018] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0019] Combination Figure 1 The excavator intake system of this embodiment includes an exhaust pipe 3, a cylinder 1 located upstream of the exhaust pipe 3, a turbocharger 2, a battery 51, a water electrolysis device 5, an oxygen tank 6, a spare oxygen tank 61, a hydrogen tank 7, a spare hydrogen tank 71, a one-way throttle valve, a thermal power generation module 4, a cooler (including an oxygen cooler 8 and a hydrogen cooler 9), a heater (including an oxygen heater 10 and a hydrogen heater 11), and a hydrogen-oxygen combustion chamber 12.

[0020] The hydrogen-oxygen combustion chamber 12 is connected to the oxygen heater 10 and the hydrogen heater 11 via a heating solenoid valve. When the heating solenoid valve is open, the hydrogen and oxygen in the oxygen heater 10 and the hydrogen heater 11 can be burned in the hydrogen-oxygen combustion chamber 12 to heat the gas passing through the oxygen heater 10 and the hydrogen heater 11. The oxygen cooler 8 is connected to the flow channel between the oxygen tank 6 and the oxygen heater 10. The oxygen cooler 8 is connected to an oxygen cooling solenoid valve. When the oxygen cooling solenoid valve is open, the oxygen in the oxygen tank 6 can be cooled by the oxygen cooler 8. The hydrogen cooler 9 is connected to the flow channel between the hydrogen tank 7 and the hydrogen heater 11. The hydrogen cooler 9 is connected to a hydrogen cooling solenoid valve. When the hydrogen cooling solenoid valve is open, the hydrogen in the hydrogen tank 7 can be cooled by the hydrogen cooler 9.

[0021] like Figure 3 The diagram shown illustrates the working principle of water electrolysis according to an embodiment of the present invention. The water electrolysis device 5 is a device for generating oxygen and hydrogen in the combustion equipment of the air intake system. The oxygen and hydrogen produced by the water electrolysis device 5 are stored in the main storage tank (oxygen tank 6 and hydrogen tank 7) for later use. An electrically controlled valve is installed at the outlet of the main storage tank, allowing the gas to flow only from the main storage tank to the cooler, and vice versa. If the oxygen and hydrogen in the main gas tank are less than 30% of the tank's capacity, the water electrolysis device 5 will continuously electrolyze water to generate oxygen and hydrogen to fill the main gas tank, regardless of the excavator's operating state, until the main gas tank is full. Reserve oxygen and hydrogen are stored in a backup gas tank. When the oxygen and hydrogen obtained from water electrolysis do not reach 30% of the main gas tank's capacity, the oxygen and hydrogen from the backup gas tank will be added to the main gas tank until it reaches 30%, at which point the filling process will stop. When the gas in the backup gas tank is less than 30%, the excavator's instrument panel will issue an alarm prompting for additional gas.

[0022] like Figure 1 The diagram shown illustrates the working principle of the thermal power generation module 4. Part of the thermal power generation module 4 extends into the exhaust pipe 3, while another part is wrapped around the outside of the exhaust pipe 3. The collected heat is transferred to a thermoelectric generator, which generates electricity driven by the temperature difference. The electricity generated by the thermoelectric generator is stored in the battery 51. When the battery 51's charge is below 30%, the generator 52 in the excavator's power system charges the battery 51. The battery 51 can also be charged by connecting to an external power source via a charger.

[0023] like Figure 1 The diagram shown is a schematic of an intake device for an intake system provided in an embodiment of the present invention. Figure 4The diagram shows the working logic of the intake system. As an example, the optimal intake air temperature T in the best operating environment is 25°C, and the optimal excess air coefficient (the ratio of the actual amount of air supplied for fuel combustion to the theoretical amount of air) is 'a'. A temperature sensor at the intake manifold constantly monitors the intake air temperature, and the ECU (Engine Control Unit) determines the excess air coefficient.

[0024] The air intake status of the excavator is determined based on the air intake temperature and air intake volume. When the air intake temperature is less than 20°C, it is considered low temperature; when the air intake temperature is higher than 30°C, it is considered high temperature. The optimal operating temperature is represented by T. When the excess air coefficient is less than a and less than 95% of a, it is considered oxygen deficiency; when the excess air coefficient is greater than a and is 105% of a, it is considered oxygen enrichment. All air intake statuses other than normal temperature and normal oxygen are considered abnormal air intake statuses.

[0025] The air intake status of the excavator is determined based on the air intake temperature and air intake volume. When the air intake status is abnormal, the oxygen and hydrogen in the oxygen tank and hydrogen tank can be used to adjust the air intake status.

[0026] When the intake state is high temperature and oxygen enrichment, the amount of excess oxygen gas V1 is calculated based on the intake volume and the theoretical air volume. The valve of the hydrogen tank is opened to spray hydrogen gas. The amount of hydrogen gas sprayed out is 2*V1. The hydrogen gas sprayed out of the hydrogen tank is cooled to temperature T1 by the hydrogen cooler and then sprayed into the intake manifold. The hydrogen gas with temperature T1 and a gas volume of 2*V1 mixes with the air with temperature T2 in the intake manifold, which can make the intake temperature reach the optimal intake temperature T. When the intake state is high temperature and oxygen deficiency, the amount of gas V2 that is less oxygen is calculated based on the intake volume and the theoretical air volume. The valve of the oxygen tank is opened to spray oxygen. The amount of oxygen sprayed is V2. The oxygen sprayed from the oxygen tank is cooled to temperature T3 by the oxygen cooler and then injected into the intake manifold. The oxygen at temperature T3 and the amount of gas V2 mixes with the air at temperature T4 in the intake manifold, which can make the intake temperature reach the optimal intake temperature T. When the intake state is low temperature and oxygen deficiency, the amount of gas that is less than oxygen V3 is calculated based on the intake volume and the theoretical air volume. The valves of the oxygen tank and the hydrogen tank are opened to spray oxygen and hydrogen respectively. The amount of oxygen sprayed is V3 + V4, and the amount of hydrogen sprayed is 2 * V4. The oxygen gas of volume V4 and the hydrogen gas of volume 2 * V4 are burned in the hydrogen-oxygen combustion chamber. The heat generated by the combustion in the hydrogen-oxygen combustion chamber heats the oxygen gas of volume V3 in the oxygen heater to temperature T5 and then sprays it into the intake manifold. The oxygen gas of temperature T5 and volume V3 mixes with the air of temperature T6 in the intake manifold to achieve the optimal intake temperature T. When the intake state is low temperature and oxygen enrichment, the amount of excess oxygen gas V5 is calculated based on the intake volume and the theoretical air volume. The valve of the hydrogen tank is opened to spray out hydrogen gas. The amount of hydrogen gas sprayed out is 2*V5. After being cooled to temperature T7 by the hydrogen cooler, the sprayed hydrogen gas is injected into the intake manifold. The hydrogen gas with temperature T7 and a gas volume of 2*V5 mixes with the air in the intake manifold with temperature T8, which can make the intake temperature reach the optimal intake temperature T. When the intake air condition is low temperature and normal oxygen, the valves of the oxygen and hydrogen cylinders are opened to inject oxygen and hydrogen respectively, with the injected oxygen and hydrogen gas volumes being 1:2. This allows the preset ratio of oxygen and hydrogen to enter the hydrogen-oxygen combustion chamber for combustion. The heat released from combustion heats the remaining oxygen-hydrogen mixture to T9 before it is injected into the intake manifold. The remaining oxygen-hydrogen mixture at temperature T9 and the temperature T in the intake manifold are... 10 The air mixture can achieve the optimal intake temperature T; When the intake air condition is high temperature and normal oxygen, open the valves of the oxygen tank and hydrogen tank to spray oxygen and hydrogen respectively. The ratio of oxygen to hydrogen sprayed is 1:2, so that the preset ratio of oxygen and hydrogen enters the hydrogen cooler and oxygen cooler respectively to be cooled to temperature T. 11 The cooled hydrogen-oxygen mixture is then injected into the intake manifold at a temperature T. 11 The oxygen-hydrogen mixture and the temperature T in the intake manifold 12 The air mixture can achieve the optimal intake temperature T; When the intake state is room temperature and oxygen-enriched, the amount of excess oxygen gas V6 is calculated based on the intake volume and the theoretical air volume. The hydrogen gas is sprayed directly into the intake manifold by opening the valve of the hydrogen tank. The amount of hydrogen gas sprayed is 2*V6. When the intake state is normal temperature and oxygen deficiency, the amount of gas V7 that is less oxygen is calculated based on the intake volume and the theoretical air volume. When the valve of the oxygen tank is opened, oxygen is sprayed directly into the intake manifold, and the amount of oxygen sprayed is V7.

[0027] Furthermore, this embodiment also uses carbon pollutant concentration and nitrogen pollutant concentration as criteria for judging the intake state. If the carbon pollutant concentration exceeds the standard, the intake state is determined to be low temperature and oxygen deficiency; if the nitrogen pollutant concentration exceeds the standard, the intake state is determined to be high temperature and oxygen enrichment. This judgment criterion has higher priority than the judgment criteria based on the intake temperature and intake volume.

[0028] When the carbon pollutant concentration exceeds the standard and the intake state is determined to be low temperature and oxygen deficiency, the amount of oxygen to be released, V8, is determined based on the carbon pollutant concentration (by referring to a pre-calibrated table corresponding to carbon pollutant concentration and oxygen volume). The valves of the oxygen and hydrogen tanks are opened to release oxygen and hydrogen respectively. The amount of oxygen released is V8 + V9, and the amount of hydrogen released is 2 * V9. The oxygen in volume V9 and the hydrogen in volume 2 * V9 burn in the oxygen-hydrogen combustion chamber. The heat generated by the combustion in the oxygen-hydrogen combustion chamber heats the oxygen in volume V8 in the oxygen heater to temperature T. 13 It is then injected into the intake manifold at a temperature T. 13 And the oxygen gas volume is V8 and the temperature T in the intake manifold 14 The air mixture can bring the intake air temperature to the optimal temperature T. When the nitrogen pollutant concentration exceeds the standard and the intake air condition is determined to be high temperature and oxygen enrichment, the excess oxygen gas volume V9 is calculated based on the nitrogen pollutant concentration (determined by referring to a pre-calibrated table of nitrogen pollutant concentration and oxygen gas volume correspondence). The valve of the hydrogen tank is opened to release hydrogen gas, with a volume of 2*V9. The hydrogen gas released from the hydrogen tank is cooled to temperature T by a hydrogen cooler. 15 It is then injected into the intake manifold at a temperature T. 15 And the amount of hydrogen gas is 2*V9 and the temperature T in the intake manifold is... 16 After mixing with the air, the intake temperature can reach the optimal intake temperature T.

[0029] Furthermore, in a specific scenario, for example: Low temperature and hypoxia: In the thin air environment of high altitude, the intake air temperature will be lower than the optimal operating temperature T, and the excess air coefficient will be lower than the normal demand value. At this time, the ECU will calculate the optimal supply temperature and volume of oxygen, and control the electronic control valve to release oxygen and hydrogen to burn in the hydrogen-oxygen combustion chamber. The excess oxygen will be heated and injected into the intake manifold.

[0030] High temperature and oxygen deficiency: In a high temperature and oxygen deficiency closed environment, the intake air temperature will be higher than the optimal operating temperature T, and the excess air coefficient will be lower than the normal demand value. At this time, the ECU will calculate the optimal oxygen supply temperature and volume, control the electronic control valve to release oxygen for cooling in the oxygen cooler, and the cooled oxygen will be injected into the intake manifold.

[0031] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An excavator air intake system, characterized in that, include: A heat collection and heating module is installed at the excavator's exhaust pipe to generate electricity using the heat from the exhaust gas and store the electricity in a battery. An electrolysis water device used to generate oxygen and hydrogen by electrolyzing water using a storage battery; Oxygen and hydrogen tanks are used to store the oxygen and hydrogen generated by the water electrolysis device. The oxygen and hydrogen in the oxygen and hydrogen tanks can be heated or cooled and then sent into the air intake manifold of the excavator. The sensor module is used to detect the intake air temperature and intake air volume in the intake manifold; The air intake status of the excavator can be determined based on the air intake temperature and air intake volume. When the air intake status is abnormal, the oxygen and hydrogen in the oxygen tank and hydrogen tank can be used to adjust the air intake status of the excavator. The battery charge needs to be maintained above the preset charge level. When the battery charge level is lower than the preset charge level, the battery is charged by the generator of the excavator power system or an external power source. The amount of gas in the oxygen tank and hydrogen tank needs to be maintained above the preset capacity. When the amount of gas in the oxygen tank and hydrogen tank is lower than the preset capacity, the water electrolysis device continues to work to replenish the oxygen tank and hydrogen tank. If the electrolysis device is still operating but it is still difficult to replenish the oxygen and hydrogen tanks to above the preset capacity, the spare oxygen and hydrogen tanks are used to replenish the oxygen and hydrogen tanks respectively.

2. The excavator air intake system according to claim 1, characterized in that, When replenishing the oxygen and hydrogen tanks using the spare oxygen and hydrogen tanks respectively, if the gas levels in the spare oxygen and hydrogen tanks also drop below the preset capacity, the excavator's instrument panel will issue an alarm prompting for replenishment.

3. The excavator air intake system according to claim 1, characterized in that, Also includes: The oxygen heater and the hydrogen heater are located downstream of the oxygen tank and the hydrogen tank, respectively; The hydrogen-oxygen combustion chamber is connected to the oxygen heater and the hydrogen heater via a heating solenoid valve. When the heating solenoid valve is open, the hydrogen and oxygen in the oxygen heater and the hydrogen heater can be burned in the hydrogen-oxygen combustion chamber to heat the gas passing through the oxygen heater and the hydrogen heater.

4. The excavator air intake system according to claim 3, characterized in that, Also includes: An oxygen cooler is connected to the flow channel between an oxygen tank and an oxygen heater. The oxygen cooler is connected to an oxygen cooling solenoid valve. When the oxygen cooling solenoid valve is opened, the oxygen in the oxygen tank can be cooled by the oxygen cooler. A hydrogen cooler is connected to the flow channel between the hydrogen tank and the hydrogen heater. The hydrogen cooler is connected to a hydrogen cooling solenoid valve. When the hydrogen cooling solenoid valve is opened, the hydrogen in the hydrogen tank can be cooled by passing through the hydrogen cooler.

5. The excavator air intake system according to claim 1, characterized in that, The heat collection and heating module includes a semiconductor thermoelectric generator.

6. A control method for an excavator's air intake system, characterized in that, Using the excavator intake system according to any one of claims 1-5, the control method includes: The air intake status of the excavator is determined based on the air intake temperature and air intake volume. When the air intake is abnormal, the oxygen and hydrogen in the oxygen and hydrogen tanks are used to adjust the air intake of the excavator.

7. The control method for an excavator air intake system according to claim 6, characterized in that, Determining the excavator's air intake status based on the air intake temperature and air intake volume includes: When the intake air temperature is lower than the lower limit of normal temperature, it is judged as low temperature; when it is higher than the upper limit of normal temperature, it is judged as high temperature; otherwise, it is judged as normal temperature. The excess air coefficient is determined based on the ratio of the intake air volume to the theoretical air volume. If the excess air coefficient is less than the lower limit of the optimal range, it is judged as hypoxia; if it is greater than the upper limit of the optimal range, it is judged as oxygen-rich; otherwise, it is judged as normal oxygen. All intake conditions other than normal temperature and normal oxygen are considered abnormal intake conditions.

8. The control method for an excavator air intake system according to claim 7, characterized in that, When the air intake condition is abnormal, the oxygen and hydrogen in the oxygen and hydrogen tanks can be used to adjust the air intake condition of the excavator, including: When the intake state is high temperature and oxygen enrichment, the amount of excess oxygen gas V1 is calculated based on the intake volume and the theoretical air volume. The valve of the hydrogen tank is opened to spray hydrogen gas. The amount of hydrogen gas sprayed out is 2*V1. The hydrogen gas sprayed out of the hydrogen tank is cooled to temperature T1 by the hydrogen cooler and then sprayed into the intake manifold. The hydrogen gas with temperature T1 and a gas volume of 2*V1 mixes with the air with temperature T2 in the intake manifold, which can make the intake temperature reach the optimal intake temperature T. When the intake state is high temperature and oxygen deficiency, the amount of gas V2 that is less oxygen is calculated based on the intake volume and the theoretical air volume. The valve of the oxygen tank is opened to spray oxygen. The amount of oxygen sprayed is V2. The oxygen sprayed from the oxygen tank is cooled to temperature T3 by the oxygen cooler and then injected into the intake manifold. The oxygen at temperature T3 and the amount of gas V2 mixes with the air at temperature T4 in the intake manifold, which can make the intake temperature reach the optimal intake temperature T. When the intake state is low temperature and oxygen deficiency, the amount of gas that is less than oxygen V3 is calculated based on the intake volume and the theoretical air volume. The valves of the oxygen tank and the hydrogen tank are opened to spray oxygen and hydrogen respectively. The amount of oxygen sprayed is V3 + V4, and the amount of hydrogen sprayed is 2 * V4. The oxygen gas of volume V4 and the hydrogen gas of volume 2 * V4 are burned in the hydrogen-oxygen combustion chamber. The heat generated by the combustion in the hydrogen-oxygen combustion chamber heats the oxygen gas of volume V3 in the oxygen heater to temperature T5 and then sprays it into the intake manifold. The oxygen gas of temperature T5 and volume V3 mixes with the air of temperature T6 in the intake manifold to achieve the optimal intake temperature T. When the intake state is low temperature and oxygen enrichment, the amount of excess oxygen gas V5 is calculated based on the intake volume and the theoretical air volume. The valve of the hydrogen tank is opened to spray out hydrogen gas. The amount of hydrogen gas sprayed out is 2*V5. After being cooled to temperature T7 by the hydrogen cooler, the sprayed hydrogen gas is injected into the intake manifold. The hydrogen gas with temperature T7 and a gas volume of 2*V5 mixes with the air in the intake manifold with temperature T8, which can make the intake temperature reach the optimal intake temperature T. When the intake air condition is low temperature and normal oxygen, the valves of the oxygen and hydrogen cylinders are opened to inject oxygen and hydrogen respectively, with a volume ratio of 1:

2. This allows the pre-specified oxygen and hydrogen to enter the oxygen-hydrogen combustion chamber for combustion. The heat released from combustion heats the remaining oxygen-hydrogen mixture to T9 before it is injected into the intake manifold. The remaining oxygen-hydrogen mixture at temperature T9 and the temperature T in the intake manifold are then... 10 The air mixture can achieve the optimal intake temperature T; When the intake air condition is high temperature and normal oxygen, open the valves of the oxygen tank and hydrogen tank to spray oxygen and hydrogen respectively, with a volume ratio of 1:

2. This allows the pre-specified proportions of oxygen and hydrogen to enter the hydrogen cooler and oxygen cooler respectively, cooling them to temperature T. 11 The cooled hydrogen-oxygen mixture is then injected into the intake manifold at a temperature T. 11 The oxygen-hydrogen mixture and the temperature T in the intake manifold 12 The air mixture can achieve the optimal intake temperature T; When the intake state is room temperature and oxygen-enriched, the amount of excess oxygen gas V6 is calculated based on the intake volume and the theoretical air volume. The hydrogen gas is sprayed directly into the intake manifold by opening the valve of the hydrogen tank. The amount of hydrogen gas sprayed is 2*V6. When the intake state is normal temperature and oxygen deficiency, the amount of gas V7 that is less oxygen is calculated based on the intake volume and the theoretical air volume. When the valve of the oxygen tank is opened, oxygen is sprayed directly into the intake manifold, and the amount of oxygen sprayed is V7.

9. A control method for an excavator's air intake system according to claim 6, characterized in that, The sensor module is also used to detect the concentration of carbon pollutants and nitrogen pollutants in the excavator; If the concentration of the carbon pollutants exceeds the standard, the intake state is determined to be low temperature and oxygen deficiency. If the concentration of the nitrogen pollutant exceeds the standard, the intake air condition is determined to be high temperature and oxygen enrichment. Determining the intake status based on carbon pollutant concentration and nitrogen pollutant concentration has a higher priority than determining the intake status based on intake temperature and intake volume. When the carbon pollutant concentration exceeds the standard and the intake state is determined to be low temperature and oxygen deficiency, the amount of gas V8 that should be released less oxygen is determined based on the carbon pollutant concentration. The valves of the oxygen and hydrogen tanks are opened to release oxygen and hydrogen respectively. The amount of oxygen released is V8 + V9, and the amount of hydrogen released is 2 * V9. The oxygen in volume V9 and the hydrogen in volume 2 * V9 burn in the oxygen-hydrogen combustion chamber. The heat generated by the combustion in the oxygen-hydrogen combustion chamber heats the oxygen in volume V8 in the oxygen heater to temperature T. 13 It is then injected into the intake manifold at a temperature T. 13 And the oxygen gas volume is V8 and the temperature T in the intake manifold 14 The air mixture can bring the intake air temperature to the optimal temperature T. When the nitrogen pollutant concentration exceeds the standard and the intake air condition is determined to be high-temperature oxygen-enriched, the excess oxygen gas volume V9 is calculated based on the nitrogen pollutant concentration. The valve of the hydrogen tank is then opened to release hydrogen gas, with the released volume being 2*V9. The hydrogen gas released from the hydrogen tank is cooled to temperature T by a hydrogen cooler. 15 It is then injected into the intake manifold at a temperature T. 15 And the amount of hydrogen gas is 2*V9 and the temperature T in the intake manifold is... 16 After mixing with the air, the intake temperature can reach the optimal intake temperature T.

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