58results about How to "Reduced knocking tendency" patented technology

The invention provides an engine which comprises an engine combustion system, a cooling system and a water spraying system. The water spraying system is formed by sequentially connecting a water sprayer, a water pressure sensor, a solenoid valve, a water pump, a filter water tank, a water level sensor and a water injector through water pipes. The water spraying system further comprises a control system. The control system forms a closed-loop control loop through the water pressure sensor, the water level sensor, the solenoid valve, the water pump and an electronic control unit. According to feedback of the water pressure sensor, the water pumping pressure of the water pump is controlled through the electronic control unit, and therefore the water spraying pressure is changed; and the opening angle of the solenoid valve is controlled through the electronic control unit to control the water spraying amount. According to the engine, water enters a combustion chamber along with fresh air through the water spraying system, the in-cylinder combustion condition is improved, and the functions of reducing the temperature in the combustion chamber and restraining knocking are achieved.

The invention discloses an overhead-valve combustion chamber of a two-stroke gasoline direction injection engine. The overhead-valve combustion chamber is a cavity encircled by a cylinder cover, an intake valve, an exhaust valve, a piston, a cylinder sleeve, a gasoline injector and a spark plug. The inclined surface of a ceiling at the intake side of the cylinder cover is composed of two connected inclined surfaces having different included angles with the axis of the piston, and a spherical gasoline avoiding pit is sunken in the inclined surface; the position of an intake door seat is higher than the ceiling at the intake side in a vertical direction, and the intake door seat and the ceiling form a step; the gasoline injector is a piezoelectric crystal outwards-opening gasoline injector and arranged at the centre of the cylinder with the spark plug; and the centre of the piston is bulged, the top surface of the bulge is inclined, and a spherical pit is sunken in the top surface. According to the overhead-valve combustion chamber disclosed by the invention, reverse tumble scavenging is realized through the step on the ceiling, and intake short-circuit is reduced; wall wetting due to fuel oil is reduced through the gasoline avoiding pit, the top surface of the bulge of the piston and the pit of the piston; and a layered mixed gas is organized through the outwards-opening gasoline injector arranged at the centre. The overhead-valve combustion chamber disclosed by the invention is capable of realizing efficient scavenging for the two-stroke gasoline engine, optimizing the layering of the fuel oil and reducing the wall wetting due to the fuel oil, and beneficial to realizing the miniaturization of the gasoline engine.

The invention relates to methods and systems for diagonal blow-through exhaust gas scavenging. Methods and systems are provided for operating an engine in a two-valve diagonal blow-through mode during which a majority of blow-through is directed via a first intake valve positioned diagonally across a first exhaust valve in order to increase a distance of flow path from the intake valve to the exhaust valve.

The invention relates to a spark plug with a precombustion chamber structure. The spark plug includes a tubular metal shell, an insulator fixed in the metal shell, a central hole arranged in the insulator, a central electrode mounted in the central hole and a side electrode connected to the metal shell. A spark plug gap is formed between the central electrode and the side electrode. A precombustion chamber shell is connected to the lower end of the metal shell. A precombustion chamber is defined by the lower ends of the precombustion chamber shell and the metal shell. The spark plug gap is located in the precombustion chamber. The precombustion chamber shell is provided with multiple upper spray holes and multiple lower spray holes. The multiple spray holes are located on the upper side ofthe multiple lower spray holes. The spark plug with the precombustion chamber structure can form up-down stratified jet flames with different spray cone angels during a combustion process of an engine, thereby accelerating the combustion of mixed gas, effectively solving the problem of decrease of burning rate when a gasoline engine adopts a Miller / Atkinson cycle, ensuring the ignition stability,and avoiding carbon deposition blockage.

A multi-layer thermal barrier coating is provided that includes an insulating layer having an outer surface defining a plurality of crevices therein and a sealing layer bonded to the outer surface of the insulating layer. The sealing layer is substantially non-permeable and is configured to seal against the insulating layer. The sealing layer fills in at least a portion of the crevices. A method of forming a thermal barrier coating is also provided, which includes a step of providing a plurality of hollow round microstructures bonded together, each having a diameter in the range of 10 to 100 microns to create an insulating layer. The method further includes depositing a plurality of metal particles onto the insulating layer and heating the plurality of metal particles to form a substantially non-permeable sealing layer over the insulating layer.

The invention provides an engine cooling system for a vehicle and the vehicle, and relates to the field of the vehicles. The engine cooling system for the vehicle comprises a water pump, a cylinder cover combustion chamber water jacket, a cylinder cover exhaust water jacket and a cylinder body water jacket; the cylinder cover exhaust water jacket and the cylinder body water jacket are connected in parallel between the water pump and the cylinder cover combustion chamber water jacket; the cylinder cover combustion chamber water jacket is provided with a cylinder cover combustion chamber water jacket exhaust side and a cylinder cover combustion chamber water jacket intake side; the cylinder cover combustion chamber water jacket is provided with at least two independent cylinder cover combustion chamber water channels communicating the cylinder cover combustion chamber water jacket exhaust side and the cylinder cover combustion chamber water jacket intake side; the cylinder cover exhaust water jacket is provided with a cylinder cover exhaust water jacket exhaust side and a cylinder cover exhaust water jacket intake side; and the cylinder cover exhaust water jacket is provided with at least two independent cylinder cover exhaust water channels communicating the cylinder cover exhaust water jacket exhaust side and the cylinder cover exhaust water jacket intake side. The invention also provides the vehicle comprising the engine cooling system. The performance of an engine can be greatly improved.

The invention relates to a multi-joint crank drive (10) of an internal combustion engine (1), comprising a plurality of coupling members (11) rotatably supported on crank pins (6) of a crankshaft (2) and a plurality of articulation connecting rods (15) rotatably supported on crank pins (19) of an eccentric shaft (8), wherein each of the coupling members (11) is pivotably connected to a piston connecting rod (4) of a piston (3) of the internal combustion engine (1) and to one of the articulation connecting rods (15). According to the invention, in order to reduce free mass forces of the second order, the multi-joint crank drive (10) is designed or adjusted in such a way that a crankshaft rotational angle range of an intake phase is greater than 180 degrees; that a crankshaft rotational angle range of a compression phase is less than 180 degrees; that a crankshaft rotational angle range of an expansion phase is greater than 180 degrees; and that a crankshaft rotational angle range of an exhaust phase is less than 180 degrees. The invention further relates to a method for operating a multi-joint crank drive (10) of an internal combustion engine (1).

The invention discloses a power assembly intelligent thermal management control method. The method comprises the steps that: 1, a cylinder cover outlet water temperature, a cylinder body outlet water temperature, a heating and ventilation requirement, an engine oil temperature, a transmission engine oil temperature, a TMM main opening degree, a TMM cylinder cover opening degree and an electronic main water pump rotating speed are collected; 2, according to the fact that whether a power assembly is powered on or not is a cut-in point, judgment is conducted by combining the engine cylinder cover outlet water temperature, the engine cylinder body outlet water temperature, the engine oil temperature, the transmission engine oil temperature and heating requirements, and different heat management modes are output, wherein the heat management modes at least comprise a standby mode, a cold start mode, a normal operation mode and a shutdown mode; and 3, the electronic main water pump rotating speed and the TMM opening degree are controlled according to the different thermal management modes and different strategies, the flow and flow resistance of all branches of a thermal management system are adjusted, and the purpose of controlling an engine coolant temperature, the engine oil temperature and the transmission oil temperature is achieved.

The invention discloses a natural gas engine which comprises a cylinder body. The cylinder body comprises an exhaust system, wherein the exhaust system comprises an intake valve and an exhaust valve, the included angle between the intake valve and the exhaust valve is 41 degrees, the included angle of the intake valve is 18 degrees, the included angle of the exhaust valve is 23 degrees, valve seat rings are arranged at the joint of the intake valve and an engine cylinder cover and the joint of the exhaust valve and the engine cylinder cover, three pressing faces are arranged on the side, facing the cylinder cover, of each valve seat ring and form a continuous stepped structure, and an air inlet of the intake valve is further connected with an air inlet manifold, and the whole air inlet manifold is of an Archimedes spiral structure; and a gas system, wherein the gas system comprises a combustion chamber and a piston, the face, facing the piston, of the combustion chamber is an inverted arc face, the top face, facing the combustion chamber, of the piston is provided with a concave part, and the concave part is matched with the arc face. The natural gas engine is a large-power and large-displacement gas engine which is large in cylinder diameter and long in cylinder sleeve. The inevitable problems of easy knocking and difficult combustion of a large-cylinder-diameter engine are solved from the aspects of a combustion system, an ignition system and the like.

The invention discloses a pre-combustion generator. The pre-combustion generator is mounted in an oil spraying device mounting hole on an engine cylinder cover, and comprises a pre-combustion generator body, wherein the pre-combustion generator body is provided with a pre-combustion chamber; the pre-combustion generator body is provided with a spraying hole for communicating the pre-combustion chamber with a combustion chamber; the pre-combustion generator body is further provided with a gas supplying device for supplying gas to the pre-combustion chamber; the pre-combustion chamber is provided with a sparking plug mounting hole; the sparking plug mounting hole is internally provided with a sparking plug; the pre-combustion generator body is further provided with a cooling device. The pre-combustion generator is provided with an independent cooling system, a gas feeding system and a control system so that one independent product is formed and the product can be conveniently applied to a diesel engine to be refitted into a gas engine; the tendency of detonation in a main combustion chamber can be reduced and the compression ratio of the existing gas engine can be increased; a piston and the cylinder cover do not need to be redesigned to change the compression ratio; the heat efficiency of the gas engine can be effectively improved and energy sources are saved.

The present disclosure provides a thermostat assembly, a cooling system, an engine, and an automobile. The thermostat assembly includes: a thermostat housing having a first inner chamber, a second inner chamber and communicating with the first inner chamber and The shut-off channel of the second inner cavity, the thermostat housing has a first opening, a second opening, a third opening and a fourth opening, the first opening and the second opening are both connected to the first inner cavity, and the third opening is connected to the second inner cavity The two inner chambers communicate, the fourth opening communicates with the first inner chamber and the second inner chamber at the same time, the first opening communicates with the radiator, the second opening communicates with the cylinder water jacket, and the third opening communicates with the automobile The heater is connected, and the fourth opening is used to communicate with the water jacket of the cylinder head; the thermostat is connected with the thermostat housing and is located at the first opening, and is used to control the on-off of the first opening. The present disclosure can adopt a single thermostat to configure the coolant flowing out of the water jacket of the cylinder block and the water jacket of the cylinder head, thereby reducing the energy consumption and cost of the engine.

The present invention relates to systems and methods for providing EGR to an engine. A method and system for providing exhaust gas recirculation to a naturally aspirated internal combustion engine is provided. In one example, exhaust is recirculated to the engine intake via a dedicated scavenge manifold and scavenged exhaust valve. Because exhaust and fresh air are returned to the engine intake at a pressure greater than atmospheric pressure, exhaust and fresh air that did not participate in combustion can be recirculated to the engine cylinders even at high engine loads.

The present invention relates to methods and systems for ignition control. Methods and systems are provided for addressing spark plug soot fouling. In one example, a method may include alternating one or more combustion events with advanced spark timing with one or more combustion events with nominal spark timing. This approach allows spark plug overheating and related problems such as knocking to be reduced.