612 results about "Exhaust gas recirculation" patented technology

An exhaust gas recirculation mixer according to certain embodiments is operable to receive a first fluid via a first fluid intake and to receive a second fluid via a second fluid intake. One of the first fluid or the second fluid comprises air, and the other of the first fluid or the second fluid comprises exhaust gas. The exhaust gas recirculation mixer generally includes a plurality of mixing passages and a plurality of multi-path nozzles. Each mixing passage includes a corresponding and respective throat. Each multi-path nozzle generally includes an outer nozzle fluidically connected to the first fluid intake, and an inner nozzle fluidically connected to the second fluid intake. The inner nozzle is nested within the outer nozzle and projects into the throat of a corresponding and respective mixing passage.

The invention discloses a detection and calibration device and method for clamping stagnation of an EGR (Exhaust Gas Recirculation) valve, and the method comprises the steps: firstly, dismounting the EGR valve of an engine, and dismounting the EGR valve into an actuator and a valve body; the first component is installed on the original installation face, in butt joint with the valve body, of the actuator, and the distance between the plane at one end of a push rod of the actuator and the installation plane of the actuator is adjusted and fixed to any numerical value; the second component is installed on the original installation face, where the actuator is installed, of the valve body, and the distance between the end face, connected with the bowl body, of the adjusting bolt unit and the installation face of the valve body is adjusted to be equal to the distance between the plane at one end of a push rod of the actuator and the installation plane of the actuator; and then detection is carried out according to an EGR valve clamping stagnation fault test method. According to the detection and calibration device and method for clamping stagnation of the EGR valve, the EGR valve cannot be damaged in the EGR valve detection process, and clamping stagnation faults can be set randomly in the stroke of the EGR valve.

The invention relates to the technical field of engines, in particular to a dynamic adjusting method for engine exhaust gas recirculation control, which comprises the following steps: S1, collecting multi-source data in real time; s2, data preprocessing and feature extraction; s3, constructing an EGR dynamic model; s4, performing intelligent decision making and hierarchical regulation and control; s5, evaluating and feeding back the regulation and control effect in real time; through multi-source data fusion and an intelligent algorithm, millisecond response and dynamic self-adaptive adjustment of the EGR rate are achieved, the problem of lag of a traditional control strategy is solved, and the response speed and the control precision of the system are improved; according to the hierarchical regulation and control strategy based on reinforcement learning, NOx emission reduction, power performance maintenance and fuel economy improvement are considered, and performance imbalance caused by single target optimization is avoided; environmental factor data is introduced to participate in model calculation, so that the EGR system can keep the optimal working state under the conditions of different temperatures, altitudes and the like, and the technical application range is widened.

According to certain embodiments, a method generally involves mixing exhaust gas and air in an exhaust gas recirculation mixer. The method includes directing exhaust gas from the engine to the mixing tube along a first flow path, and directing air to the mixing tube along a second flow path. One of the first flow path or the second flow path is an outer flow path, and the other of the first flow path or the second flow path is an inner flow path surrounded by the outer flow path. The first flow path and the second flow path merge within the throat of the mixing tube such that the exhaust gas and the air mix within the mixing tube to provide a mixture of the exhaust gas and the air.

The invention discloses a method for preserving heat of a urea NaOH and Mg (OH) 2 storage cabin, and aims at a ship which is provided with an SCR (Selective Catalytic Reduction) system, an EGR (Exhaust Gas Recirculation) system, an iCER (Initial Continuous Emission Reduction) system and a desulfurization system and needs to store urea, NaOH or Mg (OH) 2. Condensed water of the air conditioning unit is collected and then introduced into the storage cabin in a gravity mode, and the condensed water generation amount and the condensed water temperature of the air conditioning unit are analyzed and calculated. On the premise that the cabin capacity meets the condition, condensate water is used for cooling the urea cabin and then discharged into the clean cabin bottom water cabin, and the cooling capacity of the condensate water is utilized to the maximum extent. In winter or in a cold area, when the air conditioning unit does not need to operate, in order to avoid too low temperature of the solution cabin, the storage cabin can be heated by using the discharged water in the clean cabin bottom water cabin before discharging, so that the storage temperature of the urea, NaOH or Mg (OH) 2 solution is ensured to be 10-35 DEG C.

An anti-clamping stagnation EGR valve with a sealing structure is characterized in that a valve rod sub-assembly is arranged in a valve body, the valve rod sub-assembly comprises a valve rod body, a valve rod channel is formed in the valve body, the valve rod body is located in the valve rod channel, a flexible protective sleeve assembly is arranged on the valve rod body, and the flexible protective sleeve assembly comprises an inner protective sleeve, a rubber sleeve body and an outer baffle; the valve rod body penetrates through the center of the inner sheath, the center of the rubber sleeve body and the center of the outer baffle, the inner sheath is connected to the inner end of the rubber sleeve body, and the outer baffle is connected to the outer end of the rubber sleeve body. The outer baffle is in interference fit with the valve rod body; a plurality of sealing bulges are formed on the rubber sleeve body; the gap between the inner wall of the valve rod channel and the valve rod body is sealed through the sealing protrusion so that particulate matter / corrosives can be prevented from penetrating through the gap. Waste gas can be prevented from leaking along the valve rod body to the maximum extent, valve body sealing is achieved, a gas channel is isolated, particulate matter or corrosives are prevented from being accumulated in a gap between the valve rod body and the guide sleeve, carbon deposition is reduced, and the service life is prolonged.

The invention relates to the technical field of vehicle supercharging control, in particular to a supercharger performance control method and device of a hybrid power system and a vehicle. The method comprises the steps that a plateau ignition angle MAP table and a plateau air inlet VVT angle MAP table of the vehicle in a high altitude mode are obtained; a plateau air inlet VVT angle MAP table is corrected, meanwhile, the knocking thrust angle condition of the hybrid power system is checked, and the maximum performance of a current supercharger is determined so as to correct the exhaust gas recirculation rate; calibration limits are generated based on at least part of detonation, preignition, the highest rotating speed of turbine hardware, the combustion center of gravity, the combustion boundary and the HCU series-parallel economic line, and comprehensive test check is conducted based on the calibration limits so that performance optimization can be conducted on the engine. Therefore, the problems that in the related technology, due to the fact that the performance and the response speed of the supercharger in the plateau area are reduced, the actual torque of an engine cannot meet the requirement of a hybrid power system, and then the series-parallel connection switching and electricity protection capacity of the vehicle is affected are solved.

An exhaust gas recirculation mixer according to certain embodiments includes a chamber through which a first fluid is operable to flow in a downstream direction toward a mixing passage. The chamber is fluidically connected with the mixing passage via a first nozzle, and the mixing passage extends along a longitudinal axis defining the downstream direction and an upstream direction opposite the downstream direction. The exhaust gas recirculation mixer further includes a second nozzle and a fuel nozzle. The second nozzle extends into the mixing passage and is configured to direct a second fluid toward the mixing passage. The second nozzle comprises a second nozzle outlet portion circumferentially surrounded by the first nozzle. The fuel nozzle comprises a fuel nozzle outlet portion configured to inject fuel into the chamber in a fuel injection direction, and the fuel nozzle outlet portion is positioned upstream of the first nozzle.

The invention provides an engine control method and device, a computer readable storage medium and a vehicle. The method comprises the steps that under the condition that an engine is in an idling working condition, the opening degree of an exhaust gas recirculation valve of the engine and the opening degree of a throttle valve of the engine are adjusted to the corresponding preset opening degrees correspondingly; the idling working condition is the working condition of non-load operation of the engine; after the opening degree of the exhaust gas recirculation valve and the opening degree of the throttle valve are adjusted to the corresponding preset opening degrees correspondingly, the pressure of an intake manifold of the engine is obtained; under the condition that the pressure of the intake manifold is smaller than or equal to the pressure threshold value, the opening degree of the exhaust gas recirculation valve and the opening degree of the throttle valve are increased, so that the pressure of the intake manifold is larger than the pressure threshold value, and the problem that in the prior art, the engine oil consumption generated by pumping engine oil is high due to the fact that the pressure of the intake manifold is low under the engine idling working condition is solved.

A method according to certain embodiments generally involves mixing exhaust gas and air in an exhaust gas recirculation mixer. The method includes directing exhaust gas from an engine to a mixing tube along a first flow path, and directing air to the mixing tube along a second flow path. One of the first flow path or the second flow path is an outer flow path, and the other of the first flow path or the second flow path is an inner flow path surrounded by the outer flow path. The first flow path and the second flow path merge within a throat of the mixing tube such that the exhaust gas and the air mix within the mixing tube to thereby provide a mixture of exhaust gas and air.

A method according to certain embodiments generally involves mixing exhaust gas and air in an exhaust gas recirculation mixer. The method includes directing exhaust gas from an engine to a mixing tube along a first flow path, and directing air to the mixing tube along a second flow path. One of the first flow path or the second flow path is an outer flow path, and the other of the first flow path or the second flow path is an inner flow path surrounded by the outer flow path. The first flow path and the second flow path merge within a throat of the mixing tube such that the exhaust gas and the air mix within the mixing tube to thereby provide a mixture of exhaust gas and air.

The invention discloses an automobile engine multi-mode electronic control system and a control method thereof, and particularly relates to the technical field of automobile engine multi-mode electronic control, the system comprises a sensor module, a mode switching module, an execution control module and a diagnosis module, the sensor module collects parameters such as rotating speed and air inlet pressure in real time; the mode switching module judges four working conditions of idling, cruising, accelerating and pressurizing based on threshold logic; the execution control module calls strategies such as PID (Proportion Integration Differentiation) control and EGR (Exhaust Gas Recirculation) rate calculation aiming at different modes to realize accurate adjustment of parameters such as throttle opening and boost pressure; the diagnosis module monitors faults of the sensor and the actuator in real time through voltage out-of-limit detection, position deviation comparison and temperature correlation analysis.

The invention belongs to the technical field of engines, and discloses a multi-mode combustion system of a low-carbon fuel engine and a control method thereof.The multi-mode combustion system of the low-carbon fuel engine comprises a supercharger, an air inlet supercharging cooler, an engine body, a Miller adjusting mechanism and an exhaust gas recirculation (EGR) system, the Miller adjusting mechanism is arranged between the cooled air inlet channel and the engine body, and the engine body is provided with a dual-fuel injector used for injecting ignition fuel and low-carbon fuel into an air cylinder. An exhaust port of the engine body is connected with an exhaust passage, the other end of the exhaust passage is divided into two paths, one path is connected with an exhaust emission pipeline through an exhaust machine inlet of the supercharger, and the other path is communicated to an intercooling rear air inlet passage sequentially through an EGR valve and an EGR cooler. According to the multi-mode combustion system of the low-carbon fuel engine and the control method of the multi-mode combustion system, efficient compression ignition of low-carbon fuel can be achieved, the combustion process is accurately controlled, and soot emission is remarkably reduced.

This invention relates to the field of engine exhaust gas recirculation (EGR) technology, and discloses a heating and vaporization device and method for engine EGR condensate. The device includes a compressor with an inlet and an outlet on its outer side. An intercooler is fixedly connected to the outlet end away from the compressor. A pipe assembly is located in the middle of the intercooler, and an engine cylinder, a turbine, and a three-way catalytic converter are connected in series via the pipe assembly. An exhaust port is located on the outer side of the three-way catalytic converter. This invention heats the liquid water that precipitates and flows into the intercooler, causing it to undergo a complete phase change and convert into water vapor. The water vapor then enters the engine cylinder along with the gas mixture, blocking the path of liquid water intruding into the engine cylinder, avoiding the risk of misfire caused by liquid water, and improving the mechanical stability of engine operation.

The invention discloses an air inlet control method of an engine and a vehicle. The method comprises the steps that target performance parameters of multiple air cylinders in the engine are obtained, the multiple air cylinders are divided into at least two air cylinder sets, and the target performance parameters at least comprise the exhaust gas recirculation degree; based on the target performance parameter of at least one cylinder in the same cylinder group, determining a target adjustment parameter of the cylinder group; and on the basis of the target adjustment parameters, the exhaust gas recirculation degree of at least one air cylinder in the air cylinder set is adjusted, so that the multiple air cylinders have the same exhaust gas recirculation degree. The technical problem that the consistency of the working states of different air cylinders of an engine in the prior art is poor is solved.

A combustion engine arrangement comprising a combustion engine has an intake manifold, and an exhaust manifold the combustion engine arrangement comprising a turbocharged air intake system fluidly connected to said intake manifold. The turbocharged air intake system has an air pump; and an exhaust gas recirculation (EGR) system fluidly connecting said exhaust manifold to said intake manifold, the EGR system comprising an EGR pump. The EGR pump and the air pump are arranged to be independently controllable so as to enable independent control the exhaust gas inflow and the air inflow to the intake manifold of the combustion engine.

A system, for recirculating exhaust gas includes a combined cycle power plant including a heat recovery steam generator (HRSG), a gas turbine system, and an exhaust gas recirculation assembly downstream from the HRSG for receiving the exhaust gas. The exhaust gas recirculation assembly includes a direct contact cooler (DCC) in flow communication with the gas turbine system. The system also includes a computing device(s) in communication with the power plant. The computing device(s) is configured to control the combined cycle power plant by performing processes including measuring a characteristic of the exhaust gas downstream from the exhaust gas recirculation assembly and comparing the measured characteristic of the exhaust gas to a predefined characteristic threshold or a predefined characteristic range for the exhaust gas. The computing device(s) also performs processes including adjusting operational parameters of the exhaust gas recirculation assembly, and / or a distinct portion of the combined cycle power plant.

A method (200) for controlling the temperature of recirculated exhaust gas in an internal combustion engine, comprising: Operating (202) the internal combustion engine (10) in a baseline mode; Receiving (204) a signal indicating the operating temperature of a motor; (206) comparing the engine operating temperature with a predetermined IEGR threshold; if the engine operating temperature is lower than the predetermined IEGR threshold, (210) activating an IEGR mode in which internal exhaust gas recirculation is present, and activating an EEVO mode, which is an operating mode of the internal combustion engine in which exhaust valve timing is changed compared to an initial operating mode; and If the engine operating temperature is higher than the first preset IEGR threshold, the IEGR mode is deactivated and the EEVO mode is deactivated. wherein the baseline mode includes activating a primary exhaust valve opening during an exhaust event of the associated cylinder of the exhaust valve, wherein the IEGR modes include activating a secondary exhaust valve opening during an intake event of the associated cylinder of the exhaust valve and partially holding the exhaust valve (64) open between the primary exhaust valve opening and the secondary exhaust valve opening, wherein the exhaust valve (64) is fully open during the primary exhaust valve opening and the exhaust valve has less than 40% of its full opening during the secondary exhaust valve opening, including the EEVO modes: Activating the primary exhaust valve opening prior to the primary exhaust valve opening of the baseline; holding the exhaust valve fully open (64); and Closing the outlet valve (64) according to the baseline mode.

The invention provides an exhaust gas recirculation device and an exhaust gas recirculation method for an internal combustion engine. The EGR cooler exchanges heat between cooling water of an internal combustion engine and EGR gas. The EGR valve is provided in the EGR passage between the intake passage and the EGR cooler. The EGR valve is provided with a temperature sensing part into which EGR gas comes into contact. The EGR gas temperature is the temperature of the EGR gas in contact with the temperature sensing part. The valve body opens the EGR valve when the EGR gas temperature is higher than a predetermined temperature, thereby allowing flow of the EGR gas.

The invention provides a thermal management system and method for automobile exhaust gas recirculation and an automobile, the thermal management system comprises a heat exchanger, a first pipeline, a second pipeline and a regulating pipeline group, the heat exchanger is provided with a first port and a second port, the first pipeline is provided with a first multi-way valve, the first port is communicated with a first interface of the first multi-way valve, the second pipeline is provided with a second multi-way valve, and the regulating pipeline group is communicated with a second interface of the second multi-way valve. The second port is communicated with the first interface of the second multi-way valve, and the adjusting pipeline group is respectively communicated with the first multi-way valve and the second multi-way valve; according to the technical scheme, the heat exchanger at least has the beneficial effects that by arranging the adjusting pipeline set, the liquid inlet direction of the heat exchanger can be adjusted, so that the heat exchange efficiency is adjusted, the liquid inlet direction in the heat exchanger is adjusted to be reverse under the condition that the temperature is extremely low, the heat exchange efficiency is improved, and the heat exchange efficiency is improved. The heat exchange efficiency of the heat exchanger is reduced, the waste gas condensation temperature is further reduced, and the use temperature range of the waste gas recirculation system is enlarged.

The application discloses a kind of inlet passage liquid ammonia injection and exhaust gas circulation heat recovery system and method, it is related to the technical field of multi-fuel engine system, inlet passage liquid ammonia injection and exhaust gas circulation heat recovery system, comprising: liquid ammonia storage tank, liquid ammonia pressure stabilizing supply system, liquid ammonia nozzle, mixed heat exchanger, exhaust gas recirculation system and controller, controller calculates the real-time required liquid ammonia injection amount according to engine real-time working condition information and controls liquid ammonia nozzle work in real time, controller calculates the real-time required heat according to the real-time required liquid ammonia injection amount that liquid ammonia gasification and temperature rise to set temperature, according to the real-time required heat that liquid ammonia gasification and temperature rise to set temperature, calculate the real-time required exhaust gas, controller controls exhaust gas recirculation system according to real-time required exhaust gas amount and makes required amount of exhaust gas backflow into mixed heat exchanger.The application can improve engine system stability, improve engine efficiency, reduce pollutant emission.

To avoid, in an engine system comprising an exhaust gas recirculation device, function failure due to infiltration of condensate water into an intake pipe pressure introduction pipe.SOLUTION: A gas fuel supply device for an engine has a fuel cylinder 1, a regulator 2, an intake passage 5 comprising a throttle 3 and a mixer 4, a fuel pipe 8, an engine 10, and an exhaust gas recirculation device 13 that recirculates part of exhaust gas to the intake passage 5 as EGR gas, the gas fuel supply device comprising an intake pressure outlet formed in the intake passage 5, and a mounting part formed around the intake pressure outlet. The regulator 2 has an intake pressure inlet 30 formed on its outer surface. The regulator 2 is fixed to the mounting part by a fixing member in a state where the intake pressure outlet and the intake pressure inlet 30 are in direct and airtight communication.SELECTED DRAWING: Figure 1

Device for cooling a vehicle engine, comprising: a combustion chamber in which a piston moves back and forth; Water jackets (16a, 16b) through which a coolant flows to cool the combustion chamber; and a cylinder block (1) which forms a frame of the vehicle engine, wherein the cylinder block (1) comprises: a cylinder block body (10) in which the combustion chamber is formed, and an exhaust gas recirculation (EGR) cooler (30) which is mounted in the cylinder block body (10) in such a way that the EGR cooler (30) exchanges heat with a coolant discharged from the combustion chamber, wherein the cylinder block body (10) is provided with an EGR cooler insertion section (20) to which a coolant from the combustion chamber is supplied and in which the EGR cooler (30) is inserted, wherein the EGR cooler (30) is provided with a gas pipe (36) in which an exhaust gas flows, wherein the exhaust gas of the gas pipe (36) is cooled by a coolant which is supplied to the EGR cooler insertion section (20), wherein a supply opening (12) is configured to supply a coolant to the EGR cooler insertion section (20) in which cylinder block body (10) is formed, wherein the cylinder block body (10) has a plurality of cylinder chambers (18), wherein the water jackets (16a, 16b) have a circulation flow channel (16b) configured to exchange heat with all cylinder chambers (18) and a direct flow channel (16a) configured to exchange heat with one of the cylinder chambers (18), wherein the feed opening (12) is formed at a point where the circulation flow channel (16b) and the direct flow channel (16a) meet, wherein the water jackets (16a, 16b) have an arc shape which encloses the outer circumferences of the cylindrical chambers (18), and wherein the EGR cooler insertion section (20) is designed such that it extends horizontally in the longitudinal direction of the cylinder block body (10).

The invention provides an EGR mixing system, an engine and a motor vehicle, and relates to the technical field of exhaust gas recirculation, and the system comprises a gas inlet connecting pipe, a first EGR exhaust gas pipe and a second EGR exhaust gas pipe. An EGR mixing cavity is formed in the air inlet connecting pipe. The first EGR waste gas pipe communicates with one side of the EGR mixing cavity. And the second EGR waste gas pipe is communicated with the other side of the EGR mixing cavity. A mixing shuttle body is arranged in the EGR mixing cavity and is of a hollow three-dimensional shuttle-shaped structure, and in the air inlet direction of fresh air, an air inlet area through hole, an EGR area through hole and an air outlet area through hole are sequentially formed in the surface of a shell of the mixing shuttle body. EGR waste gas entering through the EGR area through hole and fresh gas entering through the gas inlet area through hole form mixed gas in the mixing shuttle body, and the mixed gas is exhausted along the air outlet area through hole. According to the system, EGR waste gas is in zero contact with the wall face of the gas inlet connecting pipe, and the wall face icing risk is reduced.

Exhaust aftertreatment system for an internal combustion engine (10), comprising an exhaust system (20) connected to an outlet (14) of the internal combustion engine (10), wherein the exhaust system has an exhaust channel (24) in which, in the direction of flow of exhaust gas through the exhaust channel (24), a turbine (28) of an exhaust gas turbocharger (26) and, downstream of the turbine (28), a particulate filter (32) are arranged, wherein the particulate filter (32) has a filter body (58) and wherein the particulate filter (32) has a housing (86) which tapers conically downstream of the filter body (58) in the form of an outlet funnel (64), characterized in that the outlet funnel (64) branches into a second funnel (66) and a third funnel (68), wherein the second funnel (66) is connected to a low-pressure exhaust gas recirculation (40) and the third funnel (68) to a main channel (50) of the exhaust system (20) is connectedwherein the second funnel (66) carries a filter element (70) at its inlet (88), and wherein the second funnel (66) has an oval inlet geometry at its inlet (88).

Vehicle thermal management system, featuring: an integrated thermal management valve (ITM) (1) for receiving engine coolant through a coolant inlet (3A) connected to an engine coolant outlet (112) of an engine (110) and for distributing the engine coolant flowing towards a radiator (300) via a coolant outlet path (3B) connected to a heating core (200) and the radiator (300); a water pump (120) arranged at a front end of an engine head coolant inlet (111) of the engine (110); a coolant branch flow path (107) branched off at a front end of the engine coolant inlet such that it is connected to an exhaust gas recirculation (EGR) cooler (500); and an intelligent single valve (SSV) (400) for adjusting an engine coolant flow in the EGR cooler flow path direction in the coolant branch flow path (107), characterized by the fact that The coolant outlet path (3B) has a radiator outlet path (3B-1) connected to the radiator (300), a heater outlet path (3B-2) connected to the heater core (200), and an EGR outlet hole (3B-3) connected to the EGR cooler (500), which is connected to the coolant branch flow path (107).

A method for monitoring an internal combustion engine (1) of a motor vehicle having an exhaust gas recirculation circuit (8), the method being for monitoring a vacuum level in a brake assist system (3), the vacuum level of the brake assist system (3) being dependent on the prevailing vacuum in an air intake distributor (17). The method comprises at least one step of measuring (E1) the vacuum level in the brake assist system (3), a step of comparing (E2) the measured vacuum level with at least one first threshold value (NOK1), and a step of deactivating (E3) the exhaust gas recirculation in order to increase the vacuum in the air intake distributor (17).

1. Name of the designed product: Linear motor exhaust gas recirculation valve (micro EGR valve). 2. Use of the designed product: For passenger car control exhaust flow. 3. Design points of the designed product: In shape. 4. Picture or photo best showing the design points: Fig. 1.

The double-flow-channel turbocharger comprises a volute body and two air inlet channels surrounding the periphery of the volute body, the two air inlet channels are configured to convey exhaust gas from an engine into the volute body, the cross section areas of the two air inlet channels are different, and the two air inlet channels are communicated with the volute body. The double-runner turbocharger further comprises two bypass channels, and the two bypass channels communicate with the two air inlet channels in a one-to-one correspondence mode and are configured to bypass at least one part of exhaust gas from the corresponding air inlet channels to bypass a turbine impeller in the volute body and exhaust the exhaust gas. The two bypass channels are internally provided with bypass valves respectively, the two bypass valves are controlled by independent actuators respectively to adjust the amount of exhaust gas entering the volute body through the corresponding air inlet channels, and then the exhaust gas recirculation utilization rate and the torque of an engine are controlled respectively.

The invention discloses a spark ignition type engine control method, relates to an internal combustion engine, and solves the technical problems of combustion efficiency reduction and single-cylinder misfire easily caused by non-uniform distribution of water in each cylinder in the case of an existing backward temperature compensation technology and a high EGR (Exhaust Gas Recirculation) rate. The method comprises the following steps: acquiring a first humidity value of an intake manifold in an engine, a second humidity value of each cylinder and a reference EGR opening value, calculating a correction coefficient according to the first humidity value, and calculating an EGR target opening value according to the reference EGR opening value and the correction coefficient; and a basic ignition angle is obtained, the humidity offset is calculated according to the second humidity value, the ignition angle compensation amount is calculated according to the humidity offset, and the basic ignition angle is compensated through the ignition angle compensation amount. The invention further discloses a spark-ignition engine control device. It is guaranteed that the engine operates at the knocking boundary for a long time, and efficient combustion is guaranteed.