8results about How to "Reduce knocking" patented technology

The invention discloses a vehicle transmission clearance torque control method and device, equipment and a medium. The method comprises the steps that target curve data with the vibration amplitude exceeding the preset amplitude are screened out from a motor rotating speed curve; determining a dynamic gap curve and a static gap curve corresponding to the target curve data; screening out a target single-point dynamic gap of which the amplitude exceeds the amplitude of a corresponding single-point static gap in the static gap curve from the dynamic gap curve, so as to determine a target rotating speed corresponding to the target single-point dynamic gap in the target curve data; determining a target torque corresponding to the target rotating speed; and the original torque curve is corrected according to the target torque and is used for torque control of the vehicle. The dynamic gap is larger than the static gap so as to identify that the vehicle is in the transmission gap state in the moving process, and the torque change rate corresponding to the transmission gap state is adjusted, so that knocking between the driving gear and the driven gear is reduced, and the running stability and drivability of the vehicle are improved.

The invention relates to a fuel gas supply system and gearbox heat management system, a vehicle and a heat management method. The fuel gas supply system and gearbox heat management system comprises a fuel gas storage cylinder assembly, and the output end of the fuel gas storage cylinder assembly communicates with the inlet end of a three-way control valve; a gas pipe input end of the gas water bath vaporizer is communicated with a first outlet end of the three-way control valve; a gas pipe input end of the gas oil bath vaporizer is communicated with a second outlet end of the three-way control valve, and a gas pipe output end of the gas oil bath vaporizer is communicated with a gas pipe input end of the gas water bath vaporizer; and the fuel gas oil bath vaporizer is provided with a gearbox lubricating oil inlet and a gearbox lubricating oil outlet. The fuel gas oil bath vaporizer is added to exchange heat with lubricating oil of the gearbox, so that the gearbox can be ensured to obtain the cooling effect with the optimal performance in an overheating mode; and meanwhile, the gasification capacity of the fuel gas supply system is improved, and more stable gas rail pressure and gas supply temperature are provided for an engine.

The invention discloses a fuel engine operation system structure integrating cooling compressed air and an operation method of the fuel engine operation system structure, and relates to the technical field of new energy and engines. Compressed air can efficiently and quickly store energy and is an energy carrier. The method comprises the following steps that S1, a compressed air tank is adopted as an air supply mechanism for cooling compressed air; s2, cooling compressed air is guided into an engine air cylinder in the early stage of an air inlet stroke or the late stage of a compression stroke, compression of the part of air in the compression stroke is reduced, the temperature of compressed mixed gas is reduced, the combustion temperature of the engine is reduced, engine knocking is reduced, the compression negative work of the engine is reduced, and the air inlet amount of the engine is increased; energy stored by compressed air is released in the expansion stroke to do positive work, the power and heat efficiency of the engine are improved, the NOx generation rate is reduced, and when the engine is in the lean-burn working condition, only a conventional emission aftertreatment system is needed to meet the emission regulation requirement; and S3, compressed air is provided by a multi-stage compressor.

The invention relates to the technical field of engines, in particular to an engine EGR rate control method and device, electronic equipment and an engine. Acquiring a current load corresponding to the target engine; acquiring a target pore plate pressure difference corresponding to the target engine according to the current load; according to the target pore plate pressure difference, the current EGR rate corresponding to the target engine is calculated; and on the basis of a preset EGR rate corresponding to the current EGR rate, an exhaust gas inlet corresponding to the target engine is adjusted, so that the current EGR rate is adjusted. The EGR rate is accurately controlled, so that temperature reduction during combustion of the target engine is guaranteed, the high-temperature and oxygen-enriched environment required by generation of nitrogen oxide is inhibited, meanwhile, knocking can be weakened, the ignition advance angle can be increased, and gas consumption can be reduced.

The present invention provides a cooling control method, device and equipment for an EGR system, the method comprising: when the EGR system of a vehicle is in operation, obtaining the operating parameters of the EGR system; wherein the operating parameters include the current intake air temperature, the current intake air flow rate and the current inlet water temperature of the EGR cooler; obtaining the current cooling water specific heat capacity and the current cooling water density corresponding to the current inlet water temperature; determining the current EGR gas heat exchange capacity according to the current intake air flow rate; determining the current inlet and outlet water temperature difference according to the current intake air temperature; determining the target inlet water flow rate according to the current EGR gas heat exchange capacity, the current inlet and outlet water temperature difference, the current cooling water specific heat capacity and the current cooling water density; and controlling the cooling water flow control element according to the target inlet water flow rate to adjust the cooling water flow rate entering the EGR cooler. The present invention can adjust the cooling water flow rate flowing into the EGR cooler according to the cooling demand of the EGR gas.

The present invention belongs to the field of petrochemical industry, and specifically provides a special fuel suitable for strengthening compression ignition engines, wherein the special fuel is composed of coal-based diesel, tripropylene glycol methyl ether, anti-wear agent, antioxidant and metal corrosion inhibitor. Compared with traditional automotive diesel, the special fuel has a higher cetane number, better lubricity and higher oxygen content; it ensures that the power performance can still be improved at the maximum throttle opening of the strengthened engine, and also ensures that the engine does not detonate under high load; better lubricity can reduce the wear and blockage of precision parts such as diesel engine injector needle valve pairs and fuel injection nozzles, and improve the running stability of the engine. At the same time, it does not contain a cetane number improver, which avoids the disadvantages of the special fuel in a closed and poor light-shielding condition, such as the decomposition of the cetane number improver, and the increase of fuel acidity to corrode metal parts.

This application relates to a gas supply system and a transmission thermal management system, a vehicle, and a thermal management method. It includes: a gas reservoir assembly, the output end of which is connected to the inlet of a three-way control valve; a gas water bath vaporizer, the gas pipe inlet of which is connected to the first outlet of the three-way control valve; and a gas oil bath vaporizer, the gas pipe inlet of which is connected to the second outlet of the three-way control valve, and the gas pipe outlet of which is connected to the gas pipe inlet of the gas water bath vaporizer. The gas oil bath vaporizer has a transmission lubricating oil inlet and a transmission lubricating oil outlet. This system increases heat exchange between the gas oil bath vaporizer and the transmission lubricating oil, ensuring optimal cooling performance for the transmission in overheated conditions. It also improves the vaporization capacity of the gas supply system, providing the engine with more stable air rail pressure and supply temperature.

The present invention relates to the technical field of gasoline, particularly to a sustainable lead-free aviation gasoline fuel composition, which comprises the following components by volume: 5-20 parts of toluene; 10 to 25 parts of xylene; 5 to 10 parts of aniline; 20-55 parts of an alkane mixture; 5-15 parts of sustainable aviation fuel; and 2-5 parts of fuel ethanol. The method for preparing the sustainable lead-free aviation gasoline fuel composition comprises the following steps: firstly mixing a mixture of toluene, xylene and alkane and sustainable aviation fuel, then adding aniline and fuel ethanol, and stirring for 1 hour to complete mixing of the lead-free aviation gasoline fuel composition. The lead-free aviation gasoline fuel composition has the characteristics of high octane number, low sulfur content, low oxygen content and the like, and all the components are generated in a sustainable production mode, so that the burden of wastes on the environment is reduced, and the influence of carbon emission on the environment is reduced.