6 results about "Diesel injection" patented technology

A burner comprises a housing and a combustion chamber assembly. The combustion chamber assembly comprises a barrel portion, a mounting base, a first spark plug, a second spark plug, and a diesel nozzle assembly. The barrel portion comprises a combustion chamber. The mounting base comprises an air inlet passage and a mounting barrel portion. The first spark plug and the second spark plug both protrude into the combustion chamber. The diesel nozzle assembly is mounted on the mounting barrel portion, and the diesel nozzle assembly is configured to inject diesel into the combustion chamber. The diesel nozzle assembly comprises a valve needle, a first swirling assembly located at the bottom of the valve needle, and a sleeve portion located below the first swirling assembly, wherein the first swirling assembly comprises an inlet hole and a throttling injection hole, the sleeve portion is provided with a mixing chamber communicated with the throttling injection hole, and the mixing chamber is used for mixing diesel and air. The throttling injection hole improves continuity of diesel injection under low power.

The present application relates to dual-fuel engine technical field, especially to a kind of methanol-diesel dual-fuel engine's fuel control method, comprising: obtaining the real-time data of engine speed value, load value and temperature value;Real-time data is input into the engine operating condition model established in advance, and the fuel demand characteristic parameter of current operating condition is output;Fuel demand characteristic parameter is input into the injection ratio model established in advance, and the injection ratio value of diesel and methanol is output;Based on injection ratio value, generate the fuel injection scheme of diesel and methanol;According to fuel injection scheme, time sequence control algorithm is used to generate diesel injection command and methanol injection command with time phase difference, and the mixing effect of diesel and methanol is monitored in real time;Not only can the injection ratio of diesel and methanol be accurately adjusted, but also the sufficient mixing of two kinds of fuels can be ensured through real-time monitoring, the fuel utilization efficiency is improved, the emission is reduced, and the stable operation and performance output of engine are ensured.

This utility model discloses a dual-fuel engine injector that can solve the problem of nozzle blockage, belonging to the field of injector technology. It includes an injector body and a needle valve body. A first needle valve passes through the needle valve body, and a second needle valve passes through the first needle valve. Multiple diesel injection holes are arranged at the bottom of the first needle valve. The inner wall of the diesel injection holes contains multiple spiral grooves, including several main spiral grooves and several secondary spiral grooves. The secondary spiral grooves are spirally arranged at the inlet and outlet ends of the diesel injection holes, and the main spiral grooves are spirally arranged continuously between the inlet and outlet secondary spiral grooves. Before the diesel fuel enters the main spiral groove and undergoes large-scale rotation, it is slowly accelerated at the inlet end of the secondary spiral groove. After flowing out of the main spiral groove, the rotational scale is reduced at the outlet end of the secondary spiral groove, ensuring the flow cross-sectional area. This allows the diesel fuel in the injection holes to generate rotational motion and increase speed, achieving a flushing effect on the inner wall, while also stabilizing the injection flow at the outlet end, ensuring stable combustion in the engine cavity.

This application discloses a control device and method for the intake system of an ammonia-diesel dual-fuel engine, relating to the field of ammonia-diesel engines. The method determines the current ammonia injection flow rate based on the ammonia temperature and pressure before injection, the ammonia nozzle's drive pulse width, and the nozzle's flow characteristics. It then controls the ammonia fuel supply system to supply ammonia based on this flow rate. The method also determines the current diesel injection flow rate based on the diesel injection pressure, the characteristics of the diesel nozzle, and the drive pulse width. Finally, it determines the ammonia-diesel energy substitution ratio based on the current diesel and ammonia injection flow rates, identifies the engine operating conditions, and obtains the required intake flow rate based on the engine operating conditions and the ammonia-diesel energy substitution ratio. The method controls the opening of two electronically controlled throttle valves based on the difference between the actual intake flow rate determined by the intake flow meter and the required intake flow rate, achieving quantitative control of the intake flow rate. This application can improve the thermal efficiency of ammonia-diesel engine combustion and reduce emissions of unburned ammonia and nitrogen oxides.

The application provides a control method of a dual-fuel methanol-diesel dual direct injection engine and a vehicle. The method comprises determining a temperature working condition of the vehicle according to an ambient temperature of the vehicle; in an extremely cold working condition, controlling a diesel nozzle to inject diesel according to first pre-injection, second pre-injection, third pre-injection and main injection per cycle, and the angle of the corresponding compression top dead center before the crankshaft rotation angle gradually decreases and the injection amount gradually increases during the successive injection process; in a cold working condition, controlling the diesel nozzle to inject diesel according to the injection parameters corresponding to the second pre-injection, the third pre-injection and the main injection; in a normal temperature working condition, controlling the diesel nozzle to inject diesel according to the injection parameters corresponding to the third pre-injection and the main injection; and in a high temperature working condition, directly entering a dual-fuel mode, controlling the diesel nozzle to inject diesel, and controlling a methanol nozzle to inject methanol. Through the control method, the problem of poor cold start performance caused by single diesel injection rate in the cold start stage is solved.

The present application belongs to the technical field of flow safety guarantee for deepwater oil and gas field development, and discloses a management method suitable for efficient operation of deepwater high pour-point oil field. The method adds a blocking valve and a diesel injection point in a double-pipe loop system, sets a free selection valve group on a manifold, and keeps the continuous flow of hot water in a non-production pipeline during single-pipe operation, thereby solving the technical problems of high pour-point and high gas-liquid ratio oil field in single-pipe and double-pipe operation modes and their switching process. The present application replaces the conventional diesel replacement scheme by continuously injecting hot water with appropriate flow and temperature conditions in the non-production pipeline, thereby reducing diesel consumption, ensuring safe and stable operation of the system, and improving the development efficiency and economic benefits of deepwater high pour-point oil field.