12 results about "Wide open throttle" patented technology

The invention provides an engine rust prevention control method and device, and relates to the technical field of vehicle control. The method comprises the steps that the flameout duration of an engine is monitored; under the condition that the flameout duration reaches the first duration, an anti-rust control strategy for the engine is entered; acquiring the speed of the vehicle; under the condition that the vehicle speed of the vehicle is larger than the preset vehicle speed threshold value, the rotating speed of an engine is controlled to reach the preset rotating speed, a throttle valve of the engine is controlled to be fully opened, and the engine is in the fuel cut-off state; and after waiting for a second duration, cancelling control over the engine to enable the engine to return to the stagnant state. According to the method, the flameout duration of the engine is monitored, and the anti-rust control strategy for the engine is started when the flameout duration reaches the first duration. The rotating speed and the throttle valve of the engine are controlled in time, so that deposited water in a manifold or a throat of the engine can be discharged from the air cylinder to the exhaust pipe in time, and the rusting probability of the engine is greatly reduced.

The control device of the internal combustion engine calculates the target rotational speed so that the target rotational speed increases as the engine coolant temperature decreases when the shutdown request of the internal combustion engine is detected. Next, racing is executed by the fuel injection is continuously executed until the engine rotational speed reaches the target rotational speed in a state where the throttle valve is fully opened. Further, the control device stops the fuel injection in a state where the throttle valve is fully opened when the engine rotational speed reaches the target rotational speed. When the output shaft of the internal combustion engine is rotated by inertia to scavenge the inside of the cylinder of the internal combustion engine, moisture generated on the inner wall of the cylinder can be blown off, so that occurrence of misfire can be suppressed.

A throttle valve arrangement for a handheld power tool, the throttle valve arrangement comprising a valve plate attached to a valve shaft, the valve shaft being arranged to rotate about a valve shaft axis from an idle throttle position to a wide open throttle, WOT, position, wherein the rotation of the valve shaft about the valve shaft axis is arranged to be biased towards a configurable valve shaft angle by a first actuator, wherein a second actuator of the throttle arrangement is arranged to resist rotation of the valve shaft about the valve shaft axis towards the WOT position, past an angle determined by a state of the second actuator.

Method for controlling an exhaust gas recirculation or EGR device in overload operation, wherein the method comprises the following steps: (a) Comparing a ratio of pressures at a front end and a rear end of a throttle valve (20) with a predetermined critical value which is a reference value for determining overload operation; (b) Performing a full-load or WOT (Wide Open Throttle) control to fully open the throttle valve (20) when the ratio of the pressures is greater than the predetermined critical value; (c) Determining whether engine torque meets a driver's torque requirement as a result of WOT control and the use of EGR, where whether the torque requirement is met is determined by comparing a torque loss due to a loss of intake air volume through the inflow of EGR gas with a torque increase due to an improvement in ignition efficiency through the inflow of EGR gas; and (d) Correcting the throttle opening or preventing the use of EGR, depending on whether the engine torque meets the torque requirement as a result of the use of EGR together with WOT control.

A independent rotary valve engine and a method for controlling thereof includes an engine crankcase, a crankshaft located therein, a bidirectional servo motor connected to the engine crankcase, a cylinder block connected to the engine crankcase, and a cylinder head connected to the cylinder block, with a spark plug and a piston linked by a connecting rod to the crankshaft. An intake rotary valve is located within a first channel in the cylinder head, and an exhaust rotary valve is located within a parallel second channel. A pulley connects a servo motor shaft of the bidirectional servo motor to the intake rotary valve. An engine control device, operatively connected to the spark plug and the bidirectional servo motor, generates spark timing signals, receives an engine speed requirement, determines a wide-open throttle position and intake valve closing angle, and generates variable valve timing signals to rotate the servo motor shaft.

The invention belongs to the technical field of engine throttle valve control, and particularly relates to a throttle valve control method and system for reducing pumping loss of an engine. Comprising the following steps: setting an entering judgment condition in combination with an environment temperature, vehicle speed information, a throttle opening degree and an engine fuel injection quantity; when the entering judgment condition is met, a throttle valve full-open mode is entered, and a throttle valve of a vehicle engine is controlled to be fully opened; according to the external torque or rotating speed requirement, the accelerator opening degree and the difference value between the actual rotating speed of the engine and the oil supply recovery rotating speed, quit judgment conditions are set; and when the quit judgment condition is met, the throttle valve full-open mode is quitted, the throttle valve is controlled to quit the full-open state, and the target opening degree is returned. According to the invention, the judgment conditions for entering and exiting the full opening of the throttle valve are added, so that the time for the EMS to control the full opening of the throttle valve is more appropriate, the time point for exiting the full opening of the throttle valve is more accurate, and the repeated full opening condition is avoided.

When a stop request for the internal combustion engine is detected, a control device for the internal combustion engine calculates a target rotational speed such that the target rotational speed increases as the engine coolant temperature decreases. Next, in a state in which the throttle valve is fully opened, the fuel injection is continued and idling is performed until the engine rotation speed reaches the target rotation speed. Furthermore, when the engine rotation speed reaches the target rotation speed, the control device stops the fuel injection in a state in which the throttle valve is fully opened. According to the present invention, an output shaft of an internal combustion engine is rotated due to inertia to scavenge the inside of a cylinder of the internal combustion engine, so that moisture generated on the inner wall of the cylinder can be blown away, and the occurrence of misfire can be suppressed.

The invention discloses a method and system for quickly responding to a torque request, a vehicle, equipment and a medium. The method for quickly responding to the torque request comprises the following steps: responding to a required torque request; judging whether the engine is in a low-load operation condition or not; if the engine is in the low-load operation working condition, whether the required air inlet amount corresponding to the required torque is larger than the corresponding air amount when the throttle valve is fully opened but not supercharged or not is judged; if the required air inlet amount corresponding to the required torque is larger than the corresponding air amount when the throttle valve is fully opened but not supercharged, whether the supercharged pressure corresponding to the required torque is larger than the preset supercharged pressure or not is judged; and if yes, the exhaust VVT control is made to enter an inactive state, and the exhaust VVT control is activated until the actual boost pressure meets the requirement. By the adoption of the control method and device, the exhaust VVT can be controlled by judging the air inlet amount and the supercharging pressure, so that the air inlet amount is rapidly increased, the power output of an engine is increased, and the torque requirement is rapidly responded.

The control device of the internal combustion engine calculates the target rotational speed so that the target rotational speed increases as the engine coolant temperature decreases when the shutdown request of the internal combustion engine is detected. Next, racing is executed by the fuel injection is continuously executed until the engine rotational speed reaches the target rotational speed in a state where the throttle valve is fully opened. Further, the control device stops the fuel injection in a state where the throttle valve is fully opened when the engine rotational speed reaches the target rotational speed. When the output shaft of the internal combustion engine is rotated by inertia to scavenge the inside of the cylinder of the internal combustion engine, moisture generated on the inner wall of the cylinder can be blown off, so that occurrence of misfire can be suppressed.

The present invention discloses a method and system for controlling a request to accelerate the opening of a mixing valve. When a vehicle's mixing valve is in a transitional operating condition from partially open to fully open, the method generates a first correction coefficient based on a first characteristic coefficient determined by the throttle fully open time ratio and the steam intake volume difference rate, combined with a second characteristic coefficient determined by the boost pressure difference rate and the engine speed. A second correction coefficient is generated based on a third characteristic coefficient determined by the target EGR rate and the transient rate of the intake air flow, combined with a fourth characteristic coefficient determined by the EGR rate difference rate and the engine speed. A multiplication correction coefficient is generated based on the first correction coefficient, the second correction coefficient, and a learning update coefficient. The mixing valve opening change rate is determined based on the multiplication correction coefficient, thereby controlling the mixing valve. The present invention can optimize the control of the mixing valve opening change rate during the transition from partially open to fully open.

A independent rotary valve engine and a method for controlling thereof includes an engine crankcase, a crankshaft located therein, a bidirectional servo motor connected to the engine crankcase, a cylinder block connected to the engine crankcase, and a cylinder head connected to the cylinder block, with a spark plug and a piston linked by a connecting rod to the crankshaft. An intake rotary valve is located within a first channel in the cylinder head, and an exhaust rotary valve is located within a parallel second channel. A pulley connects a servo motor shaft of the bidirectional servo motor to the intake rotary valve. An engine control device, operatively connected to the spark plug and the bidirectional servo motor, generates spark timing signals, receives an engine speed requirement, determines a wide-open throttle position and intake valve closing angle, and generates variable valve timing signals to rotate the servo motor shaft.

A independent rotary valve engine and a method for controlling thereof includes an engine crankcase, a crankshaft located therein, a bidirectional servo motor connected to the engine crankcase, a cylinder block connected to the engine crankcase, and a cylinder head connected to the cylinder block, with a spark plug and a piston linked by a connecting rod to the crankshaft. An intake rotary valve is located within a first channel in the cylinder head, and an exhaust rotary valve is located within a parallel second channel. A pulley connects a servo motor shaft of the bidirectional servo motor to the intake rotary valve. An engine control device, operatively connected to the spark plug and the bidirectional servo motor, generates spark timing signals, receives an engine speed requirement, determines a wide-open throttle position and intake valve closing angle, and generates variable valve timing signals to rotate the servo motor shaft.