51results about How to "Avoid speed fluctuations" patented technology

A power transmission apparatus for a vehicle includes a main drive power source; a first shift unit that has an input shaft connected to the main drive power source; a second shift unit; at least one electric motor connected to a rotating element of the first shift unit or a rotating element of the second shift unit so that the rotational speed of the electric motor is changed in accordance with a gear-shift of the first shift unit or the second shift unit, and that is able to control the rotational speed of the main drive power source by changing its rotation; and a control unit that executes control so that the direction in which the rotational speed of the main drive power source is changed is maintained constant throughout a gear-shift, when the gear-shift is a simultaneous gear-shift in which the gear-shift of the first shift unit and the gear-shift of the second shift unit are performed simultaneously and a gear ratio of the first shift unit and a gear ratio of the second shift unit are changed in opposite directions. With the control executed by the control unit, it is possible to effectively suppress occurrence of shift shock.

The invention discloses a hybrid electric vehicle power assembly control method used for a series structure. When a vehicle is static, in the process that an engine enters in an idle speed charging working condition from a no-load idle speed working condition, a motor can quickly work to the rotation speed close to that of the engine in a rotation speed control mode, then in combination with a front-end clutch, rotation speed fluctuation of the engine can be greatly avoided, and the fuel economy of the engine is improved. When the vehicle is static, in the process that the engine enters in a vehicle starting working condition from the idle speed charging working condition, the charging torque of the motor is reduced to 0 firstly, then the front-end clutch is disengaged, the motor quickly works to the 0 rotation speed in the rotation speed control mode, then a gearbox is combined with a gear-shifting clutch, power output delay generated in the starting process can be greatly reduced, and the driving feeling is improved. The problems of engine rotation speed impact generated when the front-end clutch of the hybrid electric vehicle of the series structure is engaged and power transmission delay generated when the front-end clutch of the hybrid electric vehicle of the series structure is disengaged are solved.

The present invention provides a speed-limiting method and a device. The method is applied to a switch. The switch includes a timer. The method comprises the steps of adding a token into a token bucket through the timing triggering condition of the timer or the input triggering condition of data packets; obtaining the trigger delta time according to the latest triggering time and the current time;according to the trigger delta time and a preset unit token generation time, calculating to obtain the number of required tokens; and adding tokens of the required number into the token bucket. Therefore, tokens are added into the token bucket through the timing triggering condition of the timer or the input triggering condition of data packets. As a result, the switch cannot only meet the committed information rate requirements, but also the periodic network speed fluctuation condition can be avoided.

The invention discloses a dead zone compensation method, a device, a system and a drive controller. The system comprises a motor and a drive controller, wherein a dead zone compensation circuit is connected with the motor, the drive controller is used for determining whether a inverter circuit is in a dead time. When the inverter circuit is in the dead zone time, a starting signal is sent to the dead zone compensation circuit; the dead zone compensation circuit is used for receiving the starting signal, so as to perform a dead zone compensation operation on the inverter circuit. According to the dead zone compensation method, the device, the system, and the drive controller, the motor can be a compressor, the voltage output from the inverter circuit to the motor zero during the dead time can be zero, so as to ensure that the voltage output to the motor is consistent with the expected voltage value of PWM during modulation. The current distortion caused by waveform distortion and the fluctuation of the motor speed are avoided, so that the operation of the motor is more stable and reliable, and the noise is small.

The invention discloses a motor servo controller. The motor servo controller comprises a servo motor, a standby power source, a soft startup and unloading circuit, a controllable rectification circuit connected to an AC power, a PWM inverter bridge and a DC-DC half-bridge soft switching high-frequency circuit; the DC-DC half-bridge soft switching high-frequency circuit comprises a low-voltage side half-bridge circuit, a high-frequency transformer and a high-voltage side half-bridge circuit; the low-voltage side half-bridge circuit is connected with the high-voltage side half-bridge circuit through a high-frequency transformer; the standby power source is connected with the low-voltage side half-bridge circuit; the high-voltage side half-bridge circuit is connected with the DC end of the PWM inverter bridge; the AC end of the PWM inverter bridge is connected with the servo motor; and the rectification circuit is connected with the DC end of the PWM inverter bridge. According to the motor servo controller, the standby power source can provide sufficient electric energy to the servo motor when the voltage of a power grid fluctuates, so that precision requirement of rotating speed control of a blade motor is guaranteed, and the working stability of a whole system is enhanced.

The invention relates to a method for the open-loop and closed-loop control of an internal combustion engine (BK), in particular a diesel engine or gas engine, with a generator (G) and asynchronous machine (ASM), comprising the following steps: detecting at least one electrical characteristic variable of the generator, wherein the electrical characteristic variable is selected from current (I), voltage (U) or frequency (f); determining a characteristic variable change in the electrical characteristic variable of the generator in a predetermined time interval; comparing the change in characteristic variable with a first threshold value; and in the event that the change in characteristic variable is greater than the first threshold value, changing from a standard speed control of the internal combustion engine to a feed-forward control.

The invention discloses an over-bending control method of a double-wheel drive single-rail conveyor. The distance between a front wheel and a rear wheel of the single-rail conveyor is larger than the turning radius of a curve; according to the four continuous stages, when the front wheel passes through the curve, the approach speed of the front wheel is first speed kept constant in the first stage and the second stage, the first speed is continued to be reduced to the third speed in the third stage, and the third speed is continued to be increased to the first speed in the fourth stage; the approach speed of the rear wheel is continued to be reduced to the second speed from the first speed in the first stage, the second speed of the rear wheel is continued to be increased to the first speed in the second stage, and the first speed is kept in the third stage and the fourth stage. Compared with the prior art, the speed control over the front wheel and the rear wheel conforms to the actual speed change rule of the front wheel and the rear wheel of the single-rail conveyor, the speed fluctuation caused by mismatching of the actual speed and the output speed is avoided, and it is ensured that the conveyor smoothly and stably runs in the turning process.

The invention relates to a method for controlling the composition of a combustible mixture for an internal combustion engine by means of a fuel tank venting device when venting a fuel storage device, the venting device being introduced between the fuel tank and the internal combustion engine and comprising: with an activated carbon bed The fuel storage of the fuel storage; the air intake pipeline that inputs the scavenging gas into the storage, and the air intake pipeline includes an air intake valve; the fuel pipeline that sends the fuel from the fuel tank connected to the exhaust device to the storage; The gas is fed from the reservoir to the exhaust line of the internal combustion engine, in which there is an exhaust valve; and the heat is arranged in the accumulator in the direct flow path of the fuel between the fuel line and the exhaust line Sensitive element, this method comprises the steps: determine the temperature T0 of the activated carbon bed in the direct flow path at time 0 by means of a heat sensitive element before air intake; open the air intake valve if necessary; open the exhaust valve if necessary; The sensor determines the temperature T1 in the direct flow path at time 1; and closes the exhaust valve or increases the scavenging gas when T1>T0.

The invention belongs to the field of numerical control machining process optimization, and specifically discloses a winding machine process optimization method based on dual-code joint control and a winding machine, which includes the following steps: S1, obtaining the first processing code and winding machine structural parameters, and then performing Speed ​​estimation; S2. Identify the speed fluctuation interval in the estimated speed, and smooth the speed fluctuation interval to obtain the processing feed speed, and obtain the second processing code according to the processing feed speed; S3. Through the first processing code and The second processing code jointly controls the processing of parts by the winding machine to complete the process optimization of the winding machine. The invention is based on double-code joint control, directly smoothes the winding process from the speed level, avoids the speed fluctuation and the vibration of the machine tool, and improves the processing quality of the winding machine and the service life of the machine tool.

The invention relates to a vacuum intake rubber hose for a diesel engine, which comprises a rubber hose body. The rubber hose body is provided with at least one deformation cavity along the length direction of the rubber hose body. The inner diameter of the deformation cavity is larger than the inner diameter of the rubber hose body. The outer wall forms a bulge, and the two ends of the bulge make a smooth transition with the outer wall of the rubber hose body. The inner wall of the deformation chamber has a circular arc structure, and the inner wall of the deformation chamber and the inner wall of the rubber hose body have a circular arc transition. Adopting the above-mentioned technical solution, that is, a variable-diameter deformation chamber is set on the traditional equal-diameter rubber hose, which effectively prevents the rubber hose from being sucked and deflated when the turbocharger speed fluctuates and the intake pressure decreases; avoiding engine air intake Fluctuation, to ensure the stability of engine performance, to avoid the problem of causing the diesel engine to turn off and extinguish the car caused by the introduction of gas fluctuations. In addition, the vacuum intake hose can withstand greater vibration, especially the deformation of axial tension, which is superior to the traditional equal-diameter hose.

The invention discloses a motor servo controller. The motor servo controller comprises a servo motor, a standby power source, a soft startup and unloading circuit, a controllable rectification circuit connected to an AC power, a PWM inverter bridge and a DC-DC half-bridge soft switching high-frequency circuit; the DC-DC half-bridge soft switching high-frequency circuit comprises a low-voltage side half-bridge circuit, a high-frequency transformer and a high-voltage side half-bridge circuit; the low-voltage side half-bridge circuit is connected with the high-voltage side half-bridge circuit through a high-frequency transformer; the standby power source is connected with the low-voltage side half-bridge circuit; the high-voltage side half-bridge circuit is connected with the DC end of the PWM inverter bridge; the AC end of the PWM inverter bridge is connected with the servo motor; and the rectification circuit is connected with the DC end of the PWM inverter bridge. According to the motor servo controller, the standby power source can provide sufficient electric energy to the servo motor when the voltage of a power grid fluctuates, so that precision requirement of rotating speed control of a blade motor is guaranteed, and the working stability of a whole system is enhanced.

The invention relates to an applications-oriented control device of speed-regulating clutch and a control method thereof. The device comprises a sensor unit and an electronic speed-regulating controller electrically connected with the sensor unit. The electronic speed-regulating controller comprises a signal collecting module electrically connected with the output end of the sensor unit; a mode switching signal collecting module connected with a plurality of running modes; a CPU control module electrically connected with the output ends of the signal collecting module and the mode switching signal collecting module; a ratio servo valve base point regulating circuit electrically connected to the output end of the CPU control module; and a V-I converting and current amplifying circuit electrically connected with the output end accumulating the output end of the CPU control module and the output signal of the ratio servo valve base point regulating circuit. The output end of the V-I converting and current amplifying circuit drives a ratio servo valve and controls the actions of a clutch. By using a PID control policy, the invention has the advantages of adaptation to dead zone characteristics of different ratio servo valves and wide application range.

The invention relates to the technical field of engineering machinery and discloses a power limit matching control system, method and device and an engineering machine. The power limit matching control system, method and device and the engineering machine are used for effectively reducing the flameout phenomenon caused when the power of an engine is not matched, thereby improving the controllability and the reliability of products. The control system comprises an engine control module and a rotation speed controller. The control device is connected with the engine control module and the rotation speed controller through signals and used for obtaining a target engine rotation speed value which is matched with a load power according to the load power when the rotation speed of the engine is smaller than a rotation speed threshold value, corresponding to a current gear, of the rotation speed controller. The control device also outputs a rotation speed adjustment control signal to the engine control module so as to control the rotation speed of the engine to be increased to the target rotation speed value.

The invention discloses a control method and a control device for an automobile air conditioner compressor. The method comprises the following steps: determining target temperature of an air conditioner evaporator according to temperature outside an automobile, light intensity, temperature set by a user and temperature in the automobile, acquiring the driving current of an electromagnetic valve in the air conditioner compressor according to the determined target temperature of the air conditioner evaporator, and finally determining the output torque of an engine of the automobile by virtue of the acquired driving current of the electromagnetic valve in the air conditioner compressor. According to the control method and the control device, the driving current of the electromagnetic valve in the air conditioner compressor is slowly regulated to fulfill the air of slowly regulating the output torque of the engine of the automobile according to the acquired target temperature of the air conditioner evaporator, so that the rotating speed fluctuation of the engine of the automobile is effectively avoided, the phenomenon of insufficient power of the automobile is also avoided, and the safety performance of the whole automobile is further improved.