476results about How to "Avoid knocking" patented technology

A method of operating an engine, comprising of performing homogeneous charge compression ignition combustion during a first operating condition, and performing spark ignition combustion during a second operating condition, where an amount of directly injected alcohol in at least one of said homogeneous charge compression ignition combustion and said spark ignition combustion is varied in response to at least an operating parameter.

The invention is directed to a variable compression ratio internal combustion engine in which the compression ratio of the engine can be varied and multiple types of fuels having different combustion velocities are used. The invention provides a technology for achieving excellent engine performance for respective types of fuels. In the variable compression ratio internal combustion engine in which the compression ratio can be varied and multiple types of fuels having different combustion velocities are injected through multiple fuel injection valves, maps from which a target compression ratio of the internal combustion engine is read out are switched in accordance with the fuel used, thereby suppressing knocking or other disadvantages.

Control apparatus performs knocking suppression control in an internal combustion engine provided with a variable valve mechanism that is capable of varying a closing timing IVC of an inlet valve. The control apparatus, in a case in which an alcohol concentration and octane number of a fuel are low and knocking is likely to occur, controls the variable valve mechanism and retards the closing timing of the inlet valve from the bottom dead center TDC. Thereby, the effective compression ratio is reduced and knocking occurrence is consequently suppressed.

A turbocharged-intercooled engine utilizing the turbo-cool principle and method for operating the same. The engine has an air turbine for turbo-expansion cooling. The air turbine is coupled to a compressor so intake air pressure loss as a result of turbo-expansion is partially compensated by pressure gain due to the compression process. This use of an air turbine and its coupling to a compressor define the essence of the turbo-cool principle.

The invention relates to an engine cooling system adopting a delayed circulation flow path. The engine cooling system comprises a high-temperature circulating cooling system and a low-temperature circulating cooling system, wherein the high-temperature circulating cooling system comprises a large circulation cooling fluid flow path, a small circulation cooling fluid flow path and a delayed circulation cooling fluid flow path. The engine cooling system has the beneficial effects that the heating requirements of all the parts after an engine stops can be better met and the problem of the flow direction of cooling circulation among different parts can be solved by adding an electronic control auxiliary water pump to the high-temperature circulating cooling system and realizing delayed circulation.

An engine ECU executes a program including a step of sensing a coolant temperature TW of an engine, if a start request of the engine is sensed, a step of causing only an intake manifold injector to inject fuel to start engine 10, if coolant temperature TW is lower than a threshold value TW(0), and a step of causing only an in-cylinder injector to inject fuel to start engine 10, if coolant temperature TW is higher than threshold value TW(0).

A control apparatus for an internal combustion engine includes a variable compression ratio mechanism capable of varying a compression ratio of the engine, a compression ratio setting section that sets a compression ratio to be attained by the variable compression ratio mechanism in accordance with an operating condition of the engine, a knock detecting section that detects a knock occurrence state, an ignition timing learning correcting section that determines a learning correction value of an ignition timing in accordance with the knock occurrence sate, and a compression ratio correcting section that corrects the compression ratio set by the compression ratio setting section in accordance with the learning correction value of the ignition timing. A control method is also provided.

The invention provides a piston cooling nozzle control method and system, relates to the technical field of vehicles, and aims to solve the problem that the oil consumption of a vehicle is increased due to the too low temperature of a piston. The piston cooling nozzle control method comprises the following steps: acquiring the current rotational speed and the current load of an engine in the vehicle during heat-engine running of the vehicle; opening a piston cooling nozzle when the current rotational speed of the engine is higher than or equal to the ultimate rotational speed and when the current load of the engine is higher than or equal to the ultimate load; and closing the piston cooling nozzle when the current rotational speed of the engine is lower than the ultimate rotational speed and when the current load of the engine is lower than the ultimate load, wherein the ultimate rotational speed is set to the rotational speed of the engine acquired when the piston of the engine reaches the limit of heat load and the ultimate load is set to the load of the engine acquired when the piston reaches the limit of heat load. The piston cooling nozzle control method provided by the invention is used for lowering the oil consumption of the vehicle.

The invention relates to a mechanical/pneumatic combined internal-charging type precision corn seed sowing device which is characterized by comprising a flat-plate-shaped seed sowing device underpan, a concave disk-shaped structure seed sowing tray, a semicircular-like isolation plate fixed on the underpan, a transmission shaft, an air inlet hole, a seed sowing port and a seed inlet port, whereinthe outer edge on the inner side of the seed sowing tray is provided with a circle of bosses in the circumferential direction, the bosses rotatablely abut against the underpan, a cavity is formed between the concave part of the seed sowing tray and the underpan; the bosses are provided with a plurality of hemipyramid grooves at intervals along the circumferential direction, each groove has a bigger upper opening and a smaller lower opening, and the grooves abut against the underpan to form a plurality of pockets; the outer edge of the isolation plate is arranged on the inner edge of the boss;one end of the transmission shaft is fixedly connected with the seed sowing tray, and the other end of the transmission shaft is connected with a power system after penetrating through the isolation plate and the underpan; the air inlet hole is arranged on the underpan at the start end of the isolation plate and partially penetrates through the start end of the isolation plate; the air inlet holeis connected with an air inlet pipe; the seed sowing port is arranged on the underpan below the tail end of the isolation plate; and the seed inlet port is arranged on the underpan which is adjacent to the seed sowing port and far away from the isolation plate and connected with a seed inlet pipe.

A valve performance controller for use in an engine that performs ignition timing retardation control to prevent knocking. The controller variably controls valve performance of an intake valve in accordance with an operation state of the engine. The controller corrects a control target so that the compression end temperature of a combustion chamber decreases when a retardation amount of the ignition timing obtained through the retardation control is greater than a predetermined value. The correction is performed only when the engine performance degradation that would occur when the ignition timing is retarded in a state in which the control target is uncorrected is predicted to be greater than the engine performance degradation that would occur when the control target is corrected.

The invention provides a full-automatic dryer of a pet. A plurality of blow-off nozzles are arranged on the left side, the right side and the rear side of a drying room; the blow-off nozzles are fixedby nail-free glue; a plurality of discharge outlets, a red-blue soft LED lamp, a white LED illuminating lamp and an ozone disinfection lamp are formed in the top end of the drying room; a draining device is arranged at the bottom of the drying room; a door lock device is arranged on the front surface of the drying room; a discharge room is arranged at the upper part of the drying room; a circuitboard is arranged on the bottom surface of the discharge room; exhaust outlets are formed in the two sides of the discharge room; a power starting switch is arranged on one side of the discharge roomnear the exhaust outlet; a touch control display screen is arranged on the front surface of the discharge room; a fixed bracket is horizontally arranged on the back surface inside the drying room; three groups of fans are uniformly distributed at the upper end of the fixed bracket; three PTC heating systems are uniformly distributed at the lower end of the fixed bracket. The full-automatic dryer is simple in structure, easy in production, low in cost, and easy to use and promote.

The invention provides an internal combustion engine with fuels being mixed and ignited on the spot and a control method thereof, in particular preparation, feeding and combustion control of fuels ofa combustion engine. A set of high-cetane and high-octane fuel feed and control system is additionally arranged in the internal combustion engine, and the system comprises a mixed fuel electronic control unit (8), a high-octane fuel box (9), a high-octane fuel pressure regulator (10), a high-octane fuel nozzle (13), a high-cetane fuel nozzle (14), a high-cetane fuel pressure regulator (17) and a high-cetane fuel box (18); and by controlling the high-octane flue nozzle, the high-cetane fuel nozzle and an ignition module, the spot mixing, the mixing ratio control, the excess air coefficient control and the ignition control of high-octane fuel and high-cetane fuel are achieved. The invention avoids accidental fire of the traditional single-fuel spark-ignition internal combustion engine in a cold starting process, improves the idling performance and the intermediate-speed and high-speed performance of the internal combustion engine effectively, and achieves the aims of energy saving and emission reduction of all working conditions of the internal combustion engine.

A scraping tool includes a first scraping head, a bracket affixed to the first scraping head, and an elongated pole removably coupled to the bracket access hard-to-reach target zones. In one embodiment, the bracket and the pole are freely articulated along a 360 degree circular path defined adjacent to the outer surface. In another embodiment, the bracket is statically affixed to the first scraping head and a connector is removably engaged with the bracket to quickly reconnect a variety of scraping heads. A rigid fastening member traverses through the connector as well as the second bore respectively. In another embodiment, a second scraping head is affixed to the connector for enabling the user to quickly toggle between the first and second scraping heads.

A motor including a rotor having a rotor shaft and a permanent magnet fixed to an end part of the rotor shaft, a stator disposed around the rotor, a bearing for supporting the end part of the rotor shaft, a bearing holder which holds the bearing movably in an axial direction, and a pressurization member which is disposed on an outer side in the axial direction of the bearing holder for urging the bearing to the rotor shaft side. The permanent magnet is provided with a recessed part which is capable of accommodating the bearing and the bearing holder.

The invention discloses a fuel gas concentration self-adaptive control method for a fuel gas generating set. The fuel gas concentration is the concentration of methane in fuel gas. The method comprises an open-loop fuel gas concentration self-learning starting control step carried out when the fuel gas generating set is not successfully started, wherein an engine ECU performs internal logic fuel gas concentration self-learning to reach the changed fuel gas concentration value, so that the set can be started smoothly; and the method further comprises a closed-loop fuel gas concentration self-learning control step, wherein the engine ECU continuously and finely adjusts the fuel gas methane concentration value repeatedly according to closed-loop data of an oxygen sensor, and finally performsaccurate self-learning to reach the changed fuel gas methane concentration value so that the fuel gas generating set can easily respond to the change of the concentration of the methane in the fuel gas. According to the method, the fuel gas generator set can accurately control the injection amount of a fuel gas valve and the air-fuel ratio better under the condition of fuel gas such as biogas, gasand biomass gas with the methane concentration variable, so that safe and stable operation is realized.

Fuel management system for operation of a spark ignition gasoline engine. The system includes a gasoline engine powering the vehicle and a source of gasoline for introduction into the engine. A source of an anti-knock fuel such as ethanol is provided. An injector directly injects the anti-knock fuel into a cylinder of the engine and the control system shuts down the engine by stopping gasoline and anti-knock agent flow into the engine during vehicle deceleration and idling and restarts the engine upon driver demand. Direct ethanol injection and engine shutdown results in efficiencies similar to those of full hybrid vehicles.

The invention belongs to the technical field of agricultural machinery, and particularly relates to an anti-slope spoon type corn precision seed metering device and a seed metering method thereof. A seed metering shell (1) is provided with a square plate (15), an adjusting plate (11) and a seed metering opening (13); a cover plate (2) of the seed metering device is provided with a seed feed opening (21), a seed discharge opening (26), guiding grooves (24), two first convex grooves (25) and a second convex groove (22); a plurality of circular holes (35) are uniformly distributed at intervals in the periphery direction of the outer edge of a seed metering plate (3), a spherical surface shaped spoon body is connected to the surface of each circular hole (35), and semi-closed spaces formed by the spherical surface shaped spoon bodies and a partition board (4) next to the seed metering plate (3) are called seed holding spoons (31); and a plurality of smooth tooth-shaped bulges (61) are distributed in the periphery direction of the outer edge of the top of a circular ring of a rotating wheel (6). According to the anti-slope spoon type corn precision seed metering device and the seed metering method thereof disclosed by the invention, the influence of slope on seed metering properties can be reduced, and besides, the situation that seeds are cracked is effectively avoided; redundant seeds can be well removed, so that the seed metering device has good single-grain properties; and the seed holding space is enlarged, and the seed feeding properties are improved.