19results about "Mechanical control" patented technology

A fuel-air mixture of a fuel gas and air is combusted in a combustion chamber in a gas mode of a marine dual fuel engine (1). When power of the engine (1) is increased, power is calculated by a control unit (22) from data on a rotational speed and a torque measured by a rotational speed sensor (20) and a torque sensor (21) of a crankshaft (2). Advance of an opening / closing timing of an intake valve (8) is set from a first map (24) and a second map (25) on the basis of the data on the rotational speed and the power. A second electric signal of the opening / closing timing is converted into a pressure by an electropneumatic converter (27) and adjusts a movement amount of a rod using an actuator (28). A variable intake valve timing mechanism (30) is operated on the basis of the movement amount of the rod to adjust the opening / closing timing of the intake valve (8) by advancing the opening / closing timing of the intake valve (8), and control of lowering a compression ratio of a fuel-air mixture is performed. A power-up speed can be increased while preventing knocking by setting advance amount of the opening / closing timing of the intake valve (8) using the first map and the second map in which the advance amount is previously determined.

The invention discloses a multi-fuel generator set control system, a control method thereof and a generator set, which are applied to the technical field of generator sets, the multi-fuel generator set control system comprises a multi-fuel generator set and a control system, the control system comprises a fuel change-over switch, an engine starting switch, a carburetor, a fuel gas supply electric control valve, a signal detection module, an ignition device and a control device; a gas fuel supply pipeline of the multi-fuel engine is connected with a gas inlet of the gas supply electric control valve, and a gas outlet of the gas supply electric control valve is connected with a gas fuel inlet of the carburetor. And the signal input end of the fuel type detection circuit is connected with the fuel change-over switch. The temperature sensor is used for detecting a cylinder body temperature signal of the fuel engine and compensating the injection amount of the gas fuel according to the cylinder body temperature signal of the engine. The temperature sensor is used for monitoring the temperature of the cylinder body of the engine in real time, the injection amount of the gas fuel is compensated according to the temperature of the cylinder body of the engine, and the combustion condition in the engine heating process of the engine is stabilized.

The present invention addresses the problem of starting an intermittent stop as soon as possible within a range in which emission deterioration can be suppressed. An electronic control unit for controlling an engine in which an exhaust purification catalyst is provided in an exhaust passage is configured so as to: determine whether or not the amount of a control substance in exhaust discharged to outside air is large during a catalyst warm-up period until warm-up of the exhaust purification catalyst is completed; when it is determined that the engine is not in a state in which the amount of the control material is large, intermittent stop of the engine is permitted earlier than when it is determined that the engine is in a state in which the amount of the control material is large.

Methods for a turbocharged engine, comprising: Adjusting a pressure surge line of a compressor map during vehicle operation as a function of vehicle speed.

This control device for controlling a high-pressure fuel pump (103) is provided with: a plunger operation determination unit (801); a fuel-pressure rising evaluation unit (802); a closing valve determination unit (803); and an ejection amount control unit (804) that controls a current application start timing for a solenoid (205) on the basis of a fuel pressure measured by the fuel-pressure sensor (401) and a target fuel pressure to control an ejection amount of fuel. The ejection amount control unit (804) determines a control gain of the current application start timing on the basis of a determination result of the closing valve determination unit (803).

The disclosure relates to a piston (3) for an internal combustion engine, ICE, (10) operable on a gaseous fuel, said piston having a piston top end (16) comprising a piston bowl (6) for receiving at least one gaseous fuel jet (50, 50a-c) from a fuel injector of the ICE, said piston bowl having a bottom section (11) and a circumferential side section (20) extending in an axial direction (A) between the bottom section and a piston top end surface (5), wherein said bottom section comprises a protrusion segment (18) configured to guide said at least one gaseous fuel jet, and wherein said protrusion segment further extends between spaced apart regions (27, 10 28) of the circumferential side section. The present disclosure also relates to an internal combustion engine system.

A dual-fuel variable speed load matching power generation system provides electrical power output to match an electric load and can operate completely independently of a central-type electrical power grid. The system includes an electrically controlled air and fuel, variable speed, dual-fuel, liquid-cooled engine and a liquid-cooled alternator that is configured to output an electrical supply between approximately 0.5 kW and 40 kW. The system controller is configured to modulate engine speed through both variable fuel flow and air flow into the engine. The speed of the engine may be controlled to control the output of the genset to meet prevailing electrical loads. The variable speed engine is configured to modulate between an operating speed of approximately 500 RPM to 3,600 RPM and has an average maintenance cycle of approximately 4,000 operating hours to 8,000 operating hours.

The invention provides a method of controlling an internal combustion engine (1) in a vehicle comprising a cylinder (301, 302), a fuel system (330) for supplying fuel to the cylinder, an air guide (901) arranged to guide an air flow to the cylinder (301, 302), and an exhaust guide (501, 502) arranged to guide a gas flow from the cylinder (301, 302), the method comprising - controlling the engine to provide a braking torque, the control comprising, - terminating (S1) the supply of fuel to the cylinder (301, 302), - restricting (S4) the flow through the exhaust guide (501, 502), and - restricting (S6) the flow through the air guide (901), - wherein the control of the engine to provide a braking torque also comprises - determining (S5) a value of a rotational speed of a turbocharger (4) of the engine, and - adjusting (S6), in dependence on the determined turbocharger rotational speed value, the restriction of the flow through the air guide (901), and / or the restriction of the flow through the exhaust guide (501, 502).

The invention discloses a multi-fuel generator set control system, a multi-fuel generator set control method and a generator set, which are applied to the technical field of generator sets. The control system comprises a fuel change-over switch, an engine starting switch, a carburetor, a fuel gas supply electric control valve, a signal detection module, an ignition device and a control device. A gas fuel supply pipeline of the multi-fuel engine is connected with a gas inlet of the gas supply electric control valve, and a gas outlet of the gas supply electric control valve is connected with a gas fuel inlet of the carburetor. And the signal input end of the fuel type detection circuit is connected with the fuel change-over switch. And the signal output ends of the oxygen sensors are respectively connected with the signal input end of the control device. The oxygen sensor is used for detecting an oxygen content signal, and the oxygen content signal is used for adjusting the air-fuel ratio. Closed-loop control over the air-fuel ratio can be achieved through oxygen content signals collected by the oxygen sensor so as to adapt to different air oxygen contents caused by different environmental parameters.

Control device (200) for an internal combustion engine (100) for controlling an internal combustion engine (100) with: a motor body (1), a variable compression ratio mechanism (A) which is configured to change a mechanical compression ratio of the engine body (1); and an intake system (3) configured to recirculate exhaust gas discharged from a combustion chamber (11) of the engine body (1) to an intake passage (30) of the engine body (1), wherein the control device (200) has a compression ratio control part which is configured to control the variable compression ratio mechanism (A) such that the mechanical compression ratio becomes a target compression ratio, wherein the compression ratio control part is configured to set the target compression ratio to a lower value when exhaust gas is recirculated on a low-load side of the engine in a predetermined operating range than when exhaust gas is not recirculated, in order to set an effective compression ratio to a lower value when the exhaust gas is recirculated on the low-load side of the engine in the predetermined operating range than when the exhaust gas is not recirculated.

A dual-fuel variable speed load matching power generation system provides electrical power output to match an electric load and can operate completely independently of a central-type electrical power grid. The system includes an electrically controlled air and fuel, variable speed, dual-fuel, liquid-cooled engine and a liquid-cooled alternator that is configured to output an electrical supply between approximately 0.5 kW and 40 kW. The system controller is configured to modulate engine speed through both variable fuel flow and air flow into the engine. The speed of the engine may be controlled to control the output of the genset to meet prevailing electrical loads. The variable speed engine is configured to modulate between an operating speed of approximately 500 RPM to 3,600 RPM and has an average maintenance cycle of approximately 4,000 operating hours to 8,000 operating hours.

The present application is applicable to the technical field of automobiles, and provides an engine torque control method, an engine torque control device, and a vehicle. The engine torque control method comprises: acquiring a sensor state of a temperature sensor and an intake air temperature collected by the temperature sensor, the intake air temperature being an intake air temperature after the pressure is boosted by a turbocharger; on the basis of the sensor state and the intake air temperature, determining whether a vehicle satisfies a torque limitation condition; if the vehicle satisfies the torque limitation condition, acquiring driving scenario information of the vehicle, and determining limited torque on the basis of the driving scenario information; and controlling output torque of an engine to be less than or equal to the limited torque.

An outboard motor includes an engine, a fuel pump to draw fuel into an outboard motor body from a fuel tank installed on a hull, a temporary storage tank to temporarily store the fuel drawn into the outboard motor body by the fuel pump, a fuel injector to inject the fuel stored in the temporary storage tank into the engine, a temperature sensor on the temporary storage tank to detect a temperature of the fuel stored in the temporary storage tank, and a controller configured or programmed to perform a control to limit an engine speed to no more than a predetermined upper limit rotation speed based on a detection result of the temperature sensor while the engine is running.

To provide a control device for a high pressure fuel pump that avoids pulsation of fuel pressure caused by interference between two types of control that are discharge amount control based on electric current start timing and silencing control based on an electric current value.SOLUTION: In an ECU (112) for controlling a high pressure fuel pump (103), a fuel pressure sensor (401) is disposed and a plunger phase measurement section (402) is provided. The ECU includes: a plunger operation determination section (801); a fuel pressure rise evaluation section (802); a valve closing determination section (803); and a discharge amount control section (804) that controls discharge amount of fuel by controlling electric current application start timing to a solenoid (205) on the basis of fuel pressure measured by the fuel pressure sensor (401) and target fuel pressure. The discharge amount control section (804) determines a control gain at the electric current application start timing on the basis of a determination result obtained by the valve closing determination section (803).SELECTED DRAWING: Figure 8

To enable intermittent shutdowns to be initiated as early as possible while minimizing the deterioration of emissions. [Solution] An electronic control unit 20 that controls an engine 10 in which an exhaust purification catalyst 16 is installed in the exhaust passage 13 determines whether or not the amount of regulated substances in the exhaust discharged into the outside air is high during the catalyst warm-up period until the exhaust purification catalyst 16 has finished warming up. If it determines that the amount of regulated substances is not high, it is configured to allow intermittent shutdown of the engine 10 at an earlier stage than if it were determined that the amount is high.

A two-stroke engine (4) has a throttle motor (22) for driving a throttle valve (20), a fuel injection device (430) disposed in an intake system (18) including a crank chamber (420), and a control unit (24) controlling the throttle motor (22) and the fuel injection device. The two-stroke engine (4) is designed to achieve an engine rotation speed of 4,500 rpm to 7,000 rpm when the throttle valve (20) is fully open. The two-stroke engine (4) is operated with the throttle full open by the control unit (24), and a battery (8) is charged with electric power generated by a generator (6) using the two-stroke engine.

The invention discloses a multi-fuel generator set control system, a control method thereof and a generator set, which are applied to the technical field of generator sets, and the control system comprises a fuel change-over switch, an engine starting switch, a carburetor, a high-speed electromagnetic valve, a signal detection module, an ignition device and a control device, the fuel change-over switch and the engine starting switch are respectively connected with the signal detection module, the carburetor, the high-speed electromagnetic valve, the signal detection module and the ignition device are respectively connected with the control device, and the signal detection module is used for detecting working state signals of the multi-fuel engine and sending the detected working state signals to the control device; and the control device is used for controlling the on-off state of the high-speed electromagnetic valve and the ignition time of the ignition device according to the received working state signal. The air inflow of the engine is no longer determined by the negative pressure of the engine and is determined by the high-speed electromagnetic valve, so that the consistency of the air inflow of the gas fuel at the same rotating speed is ensured.

The invention discloses a multi-fuel generator set control system, a control method thereof and a generator set, which are applied to the technical field of generator sets, the multi-fuel generator set control system comprises a multi-fuel generator set and a control system, the control system comprises a fuel change-over switch, an engine starting switch, a carburetor, a fuel gas supply electric control valve, a signal detection module, an ignition device and a control device; a gas fuel supply pipeline of the multi-fuel engine is connected with a gas inlet of the gas supply electric control valve, and a gas outlet of the gas supply electric control valve is connected with a gas fuel inlet of the carburetor. And the signal input end of the fuel type detection circuit is connected with the fuel change-over switch. The temperature sensor is used for detecting a cylinder body temperature signal of the fuel engine so as to control the pilot injection opening time of the fuel gas supply electric control valve according to the cylinder body temperature signal of the engine and a fuel type signal. According to the method, pilot injection enrichment can be started based on the cylinder body temperature signal, extra redundant steps are not needed, one-time starting is achieved, and the flexibility of air supply is greatly improved.