9 results about "Single-cylinder engine" patented technology

The invention discloses a dual-fuel single-cylinder engine combustion system based on water spraying-EGR cooperative control and a control method of the dual-fuel single-cylinder engine combustion system, and belongs to the technical field of engines. A dual-fuel single-cylinder engine combustion system based on water spray-EGR cooperative control comprises a hydrogen direct injection system, a diesel injection system, an air inlet channel water spray system, a turbocharging system, an EGR system and an electric control system, and a high-pressure water pump of the water spray system is connected with an air compressor of the turbocharging system through a coupler; the system further comprises an exhaust water circulation system, the exhaust water circulation system comprises a water-steam separator, the water-steam separator is connected to an engine exhaust pipeline, and the water separation end of the water-steam separator is connected with the water tank through a pipeline. One end of the EGR system is connected to an engine exhaust pipeline behind the water-steam separator, and the other end of the EGR system is connected to an engine air inlet pipeline in front of the air compressor. And the ECU performs water spraying-EGR cooperative control according to the working condition of the engine.

The utility model discloses a sealing cylinder body structure of a mower, the upper end face of a cylinder body is provided with an annular first sealing groove, the first sealing groove is arranged on the outer side of a piston cavity, the lower end face of a cylinder cover is provided with an annular second sealing groove, and the second sealing groove and the first sealing groove are arranged in a staggered mode. Due to the fact that the first sealing groove and the second sealing groove are arranged, two seals can be added on the basis that the cylinder gasket is sealed, and the situation that due to the fact that a single-cylinder engine works at high temperature and high pressure for a long time, a cylinder gasket material is hardened and loses elasticity is avoided. According to the device, due to the fact that the positioning shaft is arranged, the cylinder cover and the cylinder gasket can be conveniently and rapidly positioned and installed, the installation time is saved, and the installation efficiency is improved.

The utility model discloses a mechanical cooling and heating system device of a closed motor tricycle, which belongs to the technical field of engine application and comprises a frame body, an evaporator, a condenser integrated assembly, a horizontal bar engine assembly and a compressor are mounted on the frame body, the condenser integrated assembly is mounted on the side edge of the frame body, and the horizontal bar engine assembly is mounted on the side edge of the frame body. The horizontal bar engine assembly is installed on the frame body through a support, a compressor support is installed on the compressor, the compressor support is installed on the horizontal bar engine assembly, and the evaporator is placed close to the front end of the frame body. The problem that an independent air conditioning system is difficult to install in a small three-wheel truck or mechanical equipment due to space limitation is solved, the mechanical air conditioning compressor is directly integrated on the single-cylinder engine through ingenious design, space is saved, energy utilization efficiency is improved, and complexity and maintenance cost of the whole system are reduced.

The invention discloses a control method of a compression ignition type hydrogen-diesel mixed combustion single-cylinder engine system, and belongs to the technical field of compression ignition type engines. The engine system comprises a cylinder cover matched with a cylinder sleeve of an engine, an air inlet system, a diesel oil supply system, a hydrogen supply system, a cooling system and an electric control system. A high-pressure air storage tank of the air inlet system is connected with an air inlet channel in the cylinder cover through a pipeline. A hydrogen spraying device of the hydrogen supply system is arranged on the cylinder cover and communicated with the combustion chamber, and a hydrogen spraying hole of the hydrogen spraying device is communicated with an inner cavity of the hydrogen spraying device through a spiral air channel arranged in the air outlet end of the hydrogen spraying device; a water spraying valve of the water spraying system is communicated with an air inlet pipeline of the air inlet system. And the cooling system is a forced circulation cooling system. The injection timing and pulse width of diesel oil, hydrogen and water, the air inlet pressure and flow, the optimal cooling temperature of a cooling medium and the like are controlled on line through an electric control system. The hydrogen replacement rate can be increased, knocking can be reduced, and the engine efficiency can be improved.

A single-cylinder engine includes a cylinder and a cylinder head stacked on an upper portion of a crankcase, and an electronically controlled throttle interposed in an intake passage behind the cylinder head. The vehicle body frame includes a pair of main frames extending rearward from a head pipe, and rear portions of the pair of main frames form a pair of body frames bent downward behind the cylinder head. The electronically controlled throttle includes a throttle valve provided in the intake passage and an actuator that opens and closes the throttle valve. In a side view, an upper edge of the actuator is along a lower edge of the suspension bracket, and a rear edge of the actuator is along front edges of the body frames.

The application provides a method for adjusting an optical single-cylinder engine EGR rate, comprising the following steps: S1, determining a target test working condition of the optical single-cylinder engine; S2, determining an initial CO2 flow rate required to be introduced into the optical single-cylinder engine according to test parameters of a four-cylinder engine in the market when the four-cylinder engine performs the target test working condition on a test bench; S3, opening a CO2 cylinder and a pressure reducing valve, and controlling a manual valve switch to introduce pure CO2 into the optical single-cylinder engine, and running the optical single-cylinder engine in a motoring mode; S4, calculating an actual EGR rate of the optical single-cylinder engine according to CO2 concentrations measured by a first CO2 concentration measuring device and a second CO2 concentration measuring device; S5, judging whether the actual EGR rate reaches a target EGR rate; S6, if the actual EGR rate does not reach the target EGR rate, controlling the manual valve switch to correct the CO2 flow rate, and measuring the corrected actual EGR rate again; repeating the steps S5 to S6 until the corrected actual EGR rate reaches the target EGR rate.

This invention discloses a two-stage combustion six-stroke engine, comprising a single-cylinder engine body, a fuel injector, and a valve train unit disposed on the cylinder head; the valve train unit includes a gas reservoir, a first intake port, a second intake port, and a gas injector, used to compress and store gas and release gas; the center of the injector nozzle is located on a first axis; the centers of the gas reservoir and the injector nozzle are located away from the first axis to form tumble flow in the combustion chamber; the six-stroke engine utilizes the gas reservoir and part of the first intake port to achieve two consecutive compression and combustion of the working fluid in the same cylinder; moreover, in the second compression and combustion power stroke, the gas injected into the combustion chamber by the gas injector interacts with the in-cylinder airflow formed near the gas reservoir, forming enhanced tumble flow in the combustion chamber.

The application discloses a single-cylinder engine intake and exhaust pressure boundary control device and method, and relates to the technical field of single-cylinder engines. The control device comprises a single-cylinder engine, an air compressor connected to the air inlet end of the single-cylinder engine, and an exhaust manifold connected to the air outlet end of the single-cylinder engine. The air inlet control module comprises an air inlet fluctuation valve connected between the air compressor and the single-cylinder engine, which is used for adjusting the control parameters of the first gas provided by the air compressor, so that the first gas meets the air inlet requirements of the single-cylinder engine. The exhaust control module comprises an exhaust fluctuation valve connected between the single-cylinder engine and the exhaust manifold, which is used for adjusting the control parameters of the second gas discharged by the single-cylinder engine, so that the second gas meets the exhaust requirements of the single-cylinder engine. In this way, by arranging the air inlet fluctuation valve and the exhaust fluctuation valve, the fluctuation amplitude, waveform and period of the single-cylinder engine intake and exhaust are controlled, and then the single-cylinder engine intake and exhaust pressure boundary is controlled, and the control precision of the intake and exhaust pressure boundary is improved.