125results about How to "Increase low speed torque" patented technology

A turbocharger apparatus of an engine may include a turbine installed to generate a rotating force from an exhaust gas flow of the engine, a compressor selectively coupled to the turbine to be rotated for compressing air which is to be supplied into an engine combustion chamber of the engine, a shaft installed to transfer the rotating force of the turbine to the compressor, a clutch installed to the shaft to control the transfer of the rotating force between the turbine and the compressor, a planetary gear unit connected to the compressor, and a motor generator mounted onto the shaft and coupled to the planetary gear unit to receive the rotating force of the compressor through the planetary gear set.

A bypass conduit (23) connects an outlet passage of a compressor (21) of an exhaust gas turbocharger (20) and an inlet passage of an exhaust turbine (22), and a bypass valve (24) is provided therein. When the operating condition of a diesel engine (1) is found to be in a low-speed and high-load region, the bypass valve (24) is controlled by means of a valve controller to adjust the bypass conduit (23) so as to open it. Then, the charge air partly flows into an exhaust conduit (4) to increase the rotational speed of the exhaust turbine (22) and hence the charge air flow rate raises the output of the diesel engine (1). Additionally, as the charge air flow rate is increased, the operating condition of a compressor (21) is prevented from approaching the surging range.

The invention relates to an alternating current permanent-magnet synchronous machine controller which comprises a digital signal microprocessor (DSP), a power converter, an alternating current permanent-magnet synchronous machine, a position detector and a current detector, wherein the position detector inputs the detected rotor position signal and rotor speed signal of the alternating current permanent-magnet synchronous machine by a quadrature encoder pulse (QEP) unit of the DSP; the current detector inputs the detected current signal of the alternating current permanent-magnet synchronous machine by an analog to digital (A/D) conversion interface of the QEP of the DSP; the DSP calculates the given value of current according to the input rotor position signal and rotor speed signal, and compares the given value of current with the input detected value of current to obtain the corresponding control signal for controlling the width of the pulse-width modulation (PWM) pulse; and the PWM signal drives the alternating current permanent-magnet synchronous machine by the power converter. The invention has the advantages of compact and firm structure, simple circuit, low cost, reliable performance, stable operation, wide speed adjusting range, high efficiency, high accuracy and the like.

The invention relates to a continuously adjustable mechanical hydraulic valve lift device which belongs to the technical field of internal combustion engine. The continuously adjustable mechanical hydraulic valve lift device comprises a valve cam, a valve, a valve spring, a plunger piston adjusting arm, a plunger piston spring base, a tappet plunger piston, a plunger piston spring, a tappet plunger barrel, a retaining nut, a low pressure oil cylinder, a first gasket, a second gasket, an executing plunger piston and an executing plunger barrel. The lift range is decided by the relative position of the tappet plunger piston and a first oil hole at the tappet plunger barrel. The symmetrical plane of the plunger piston adjusting arm is coincident with the symmetrical plane of a diclinic section at the head of the tappet plunger piston, and the symmetrical plane of the plunger piston adjusting arm along the axial line is considered as a reference plane. When maximum lift is required, the plunger piston adjusting arm is rotated to ensure that the reference plane is parallel with the axial line of the first oil hole. When minimum lift is required, the plunger piston adjusting arm is rotated to ensure that the reference plane is vertical to the axial line of the first oil hole. When medium lift is required, the plunger piston adjusting arm is rotated to ensure that the reference plane and the axial line of the first oil hole form any angle between 0 to 90 degrees. The device has simple structure and can adjust valve lift, valve right timing and duration continuously.

The invention discloses an alternating current permanent magnet synchronous machine control system for an electric vehicle. The system comprises an alternating current permanent magnet synchronous machine, a power convertor, a controller and detectors; the controller is a digital signal processor (DPS); the detectors comprise a position detector and a current detector; the position detector and the current detector input rotor positions/speed signals and current signals, which are detected by the position detector and the current detector respectively, of the alternating current permanent magnet synchronous machine to the DSP; the DSP calculates the given value of the current according to the input rotor positions/the speed signals and compares the given value and the input current detection value to obtain a corresponding control signal, and the alternating current permanent magnet synchronous machine is driven by the power convertor; and the power convertor has a three-phase double-inversion bridge structure consisting of a metal-oxide-semiconductor field effect transistor (MOSFET) inverter and an insulated gate bipolar transistor (IGBT) inverter. The system has the advantages of compact and firm structure, reliable performance, high control efficiency and accuracy and the like and runs stably and a circuit is simple.

The invention discloses an engine with adjustable compression ratio, comprising a cylinder, a piston arranged in the cylinder and an upper connecting rod of which the upper end socket is articulated with the piston pin and the lower end socket is articulated with the eccentric pin; the eccentric pin is integrally formed with a first pin which is fixedly connected with one or two auxiliary driving wheels; the auxiliary driving wheels are coaxial with the first pin and are provided with an oscillating bar; one end of the oscillating bar is articulated on the first pin, and the other end is supported on a second pin on the engine cylinder and is coaxially connected with one or two active driving wheels which are parallel to the auxiliary driving wheels and rotate under control; the active driving wheels drive the auxiliary driving wheels to rotate; the middle part of the oscillating bar is provided with articulating points and is articulated with a lower connecting rod which is connected with a crank. The engine has low height of the complete machine of the engine, good rigidity of the crankshaft, long service life, low cost, good dynamic property, simple and convenient adjustment of compression ratio, great output low speed torque, high power, little fuel consumption and low discharge pollution.

The invention discloses an internal-combustion engine cooling system based on an integrative permanent magnet synchronous motor water pump and an electronic speed regulation technology, belonging to the (electronic control) technical field of internal-combustion engine. The internal-combustion engine cooling system can be used for small water-cooled internal-combustion engine cooling systems and can be used for cooling other mechanical, electronic and electrical equipment. The purpose of the invention is to bring simple system, improve cooling control performance and temperature control precision, lower power consumption and obviously improve reliability and practicality. The internal-combustion engine cooling system is characterized in that the internal-combustion engine cooling system comprises a single circulation path cooling circulation system; a permanent magnet rotor operating in a water pump case forms an integrative permanent magnet synchronous motor water pump; the permanent magnet synchronous motor water pump, a temperature sensor and an electronic speed regulation driving circuit form an automatic cooling control system which can realize required temperature-water pump flow characteristic and engine body temperature-heat dissipating characteristics and can keep the engine body temperature stable.

The invention discloses a two-stage supercharging system matching method based on simulation calculation, first-stage electric supercharging and second-stage turbocharging which are arranged in seriesare adopted in two-stage supercharging, and an electric supercharger is provided with a bypass pipeline. During two-stage supercharging matching, firstly, according to the performance development target of an engine, the air inlet flow and pressure requirements of the engine are obtained through analysis, the actual measurement performance Map of a turbine and an air compressor is matched according to the requirements, and the scheme that the low-speed torque, the maximum torque section, the rated power and the plateau power of the engine are comprehensively optimal is selected. On the basis,the bypass branch is closed, two-stage supercharging joint matching is conducted, the rotating speed of the electric supercharger is adjusted to conduct first-stage supercharging, the inlet air pressure of the turbocharger is increased, second-stage supercharging is conducted through the turbocharger, and therefore the effects of increasing the low-speed torque of the engine and expanding the range of the maximum torque section are achieved. And the simulated electric supercharging rotating speed and turbocharging waste gas bypass valve data are used for rack calibration development.

The invention relates to the technical field of the blender, especially to a folding type blender comprising a pedestal, a support connected to the pedestal, a motor arranged in the support, and a processing assembly in transmission connection with the motor. A fixed hole is formed in the pedestal and a connecting hole is formed in the support; a rotating shaft is inserted into the fixed hole and the connecting hole, so that the pedestal and the supported are hinged; and the rotating shaft and the fixed hole in the pedestal are connected. A first locking delocking mechanism is arranged between the rotating shaft and the connecting hole, so that the rotating shaft and the support can rotate relatively or are locked to avoid rotation. Besides, a rotatable adjusting shaft is arranged in the rotating shaft and is used for changing the state of the first locking delocking mechanism. According to the invention, the nose support and the pedestal can be folded in a rotating mode, so that the storage space is saved effectively. When low-speed stirring is carried out, the blender can be placed in or taken out of any container with any size conveniently; and food spilling is avoided.

The invention discloses a piston reciprocating double-cylinder engine which is formed by paralleling L-shaped engine double cylinders, and the declared speeds of a left crankshaft (1) and a right crankshaft (2) are the same and equal to the declared speed of an existing engine; the declared speed of an output shaft (2) is the declared speed output by the engine to the outside and can be equal to, smaller than or larger than the declared speeds of the crankshafts according to the requirements of the outside; thus, the working property is optimized, the application range of the engine is enlarged, auxiliary devices additionally arranged among devices are omitted or simplified, and the cost of occupied by the auxiliary devices and the device bearing and assembly spaces are saved; meanwhile, the piston reciprocating double-cylinder engine has the advantages that the structures of the L-shaped engine double cylinders and the crankshafts are simple, the manufacturing cost is low, stability is high, the low-speed torque characteristic is good, and the total length of the V-shaped engine is small, so that the space is saved, and arrangement is facilitated; and the disadvantages that a V-shaped engine is complex in structure, high in manufacturing cost and difficult to maintain and repair, and an L-shaped engine is long, so that arrangement is difficult are overcome.

The invention provides a gasoline engine exhaust silencer composed of porous pipes. The gasoline engine exhaust silencer comprises a front end cover, an outer barrel body, a tail cover and a tail pipewhich are connected in sequence. The gasoline engine exhaust silencer further comprises a silencing assembly arranged inside the outer barrel body. The silencing assembly comprises the first porous pipe, the second porous pipe and the glass fiber supporting porous pipe. The pipe wall of the first porous pipe is provided with a plurality of first silencing holes, and the first porous pipe is arranged in the second porous pipe. The pipe wall of the second porous pipe is provided with a plurality of second silencing holes. The pipe wall of the glass fiber supporting porous pipe is provided witha plurality of first sound absorption holes. A glass fiber layer is arranged between the glass fiber supporting porous pipe and the outer barrel body. A glass fiber layer is arranged inside the tail cover. The end face, facing towards the interior of the outer barrel body, of the tail cover is provided with a plurality of second sound absorption holes. The silencing effect and silencing performance are good so as to reduce noise pollution caused by operation of a gasoline engine, and the gasoline engine is large in largest power, high in highest speed and small in power loss.

The invention belongs to the gasoline engine field, in particular to an air management system of a supercharger gasoline engine, which comprises an air compressor, an intercooler, a main turbine and a double-effect turbine; in the medium or high speed operating condition, the double-effect turbine is serially connected behind the intercooler; the a cylinder and a main turbine are serially and sequentially connected behind the double-effect turbine; the double-effect turbine acts the turbine cooling effect; in the low speed operating condition, the intercooler, the cylinder and the main turbine are serially connected, and then the double-effect turbine is serially connected; the double-effect turbine acts the effect of improving the output torque. The air management system of a supercharger gasoline engine has the advantages of realizing the functions of turbine cooling and the double turbo supercharging, well controlling the inlet gas temperature, allowing higher supercharging ratio and improving the low-speed torque, adopting different operation modes under the high, medium and low rotation speeds, enabling the operation state of the system to be optimized under different operating conditions.

The invention provides a variable compression engine. The problem about the unified compression ratio of different engine loads in the prior art is solved. The technical scheme is achieved in the manner that the variable compression engine comprises an air cylinder head, a motor and a variable compression piston. The variable compression piston is installed at the position of a combustion chamber of the air cylinder head and is connected with the motor. Due to a vehicle-mounted ECU control motor, the compression ratio of the engine during low-load running and the compression ratio of the engine during medium-load running and high-load running are completely different, the ignition position is also changed along with different compression ratio states, and the requirement for different compression ratios and different ignition positions when different engine loads and different engine rotating speeds are adopted is met, and therefore the power and the momentum of the engine are improved by improving the combustion efficiency of fuel.

The invention discloses an engine combustion system and a control method thereof. The system comprises an engine body, an air inlet and exhaust system, a gasoline air channel injection system, an ethanol cylinder direct injection system, an ignition system, a variable valve system, an exhaust gas recirculation system and an electronic control unit; the engine body is connected with the air inlet and exhaust system, the ethanol cylinder inner direct injection system, the ignition system and the variable valve system, the air inlet and exhaust system is connected with the gasoline gas channel injection system and the waste gas recirculation system, the gasoline air channel injection system, the ethanol cylinder direct injection system, the ignition system, the variable valve system and the exhaust gas recirculation system are connected with the electronic control unit, and a high-geometric compression ratio is adopted by the engine body. Therefore, the gasoline and ethanol dual-fuel composite combustion is realized through the corresponding combustion mode, and the early combustion and detonation tendency of a large-load working condition region are inhibited, the low-speed torque and the power density of an engine are improved, and the combustion efficiency and the heat efficiency are improved.

The invention discloses a direct-drive wheel device based on a magnetic resistance switch motor. The device comprises a tire and a magnetic resistance outer rotor direct-drive motor arranged in the tire. A speed reduction device and a steering device are arranged in the magnetic resistance outer rotor direct-drive motor. An achieving method of the direct-drive wheel device based on the magnetic resistance switch motor comprises the following steps that 1, dynamic pole adjustment is carried out on stators in the magnetic resistance outer rotor direct-drive motor; 2, all poles of outer rotors of the magnetic resistance outer rotor direct-drive motor are excited at the same time; 3, multiple groups of voltage and current are dynamically communicated with windings; 4, air is compressed to control speed reduction or steering. The cost of the magnetic resistance switch motor is largest, the cost of materials and a driver is low, and therefore the cost of a carrying robot, a remote driving electric automobile and the like composed of the device is greatly lower than that of a traditional internal combustion automobile.

The invention discloses a piston reciprocating tank engine. It is characterized in that two rows of L-shaped engine cylinders connected vertically and parallelly in parallel replace the engine cylinders of multiple rows of V-shaped engines; the output shaft (2) is arranged in the middle of the left and right crankshafts (1, 3); the left and right crankshaft gears (4, 6 ) with the same rotating speed and opposite rotation directions, and respectively mesh with the output shaft gear (5) to form a gear set; adjusting the ratio of the diameter of the pitch circle diameter of the crankshaft gear to the pitch circle diameter of the output shaft gear can adjust the output of the output shaft (2) to the outside world. calibrated speed. It has the advantages of L-type engine engine cylinder and crankshaft with simple structure, low cost, easy maintenance, stable operation, high thermal efficiency, and V-type engine body length is short, easy to arrange, etc., and can also reduce the rated speed of the engine output, several times Increase the low-speed torque of the engine.

The invention discloses a high-power piston-reciprocating low-speed engine for large ships. The piston diameter and the average speed of an existing large high-power piston-reciprocating low-speed engine (hereinafter referred to as a contrast engine) are kept basically unchanged, the rated rotating speed of crankshafts (1,3) is increased to be three times that of the contrast engine, and the piston travel is 1/3 of that of the contrast engine, so that the rated power of the engine is identical with that of the contrast engine, and the size of the engine is only 1/4 of that of the contrast engine; then the ratio of the crankshaft gear reference circle diameter to the output shaft gear reference circle diameter is set as 1:3, so that the rated rotating speed output by the engine is identicalwith that output by the contrast engine; after the engine has the unchanged functions but the smaller size, a lot of expensive steel materials are saved, the technical difficulty in manufacturing andmaintenance of large working components is overcome, a lot of manufacturing and maintenance costs are saved, the gravity center of the engine is lowered, and the working performance is more excellent.

The invention relates to frame-type interference-free three-dimensional parking equipment. A storage battery and a direct-current motor are connected in sequence and directly connected with a hydraulic mechanism to control each action mechanism to act, so that an integrated frame moves forwards, a rotary frame rotates, a lifting seat is lifted, and the interference-free parking work is finished together with a sensing mechanism, a limiting mechanism and a controller. The frame-type interference-free three-dimensional parking equipment takes the hydraulic mechanism as a power driving source and is small in volume, simple in structure, low in cost, smooth in action and low in noise; all actions of the equipment are driven by adopting hydraulic parts, so that the operation is stable and the dynamic speed adjustment range is large; each motion displacement position is matched with the hydraulic dynamic length, so that the phenomena of top pushing and the like during failure of a system control part do not occur and the safety is improved; and a power source of the hydraulic mechanism selects and uses a direct-current drive source, the direct-current motor is powered by adopting the storage battery, the parking equipment is energy-saving and efficient through a pulse control technology, the environmental noise is lower when the equipment runs, the motor is large in low-speed torque and stable to start, and the vehicle parking and getting processes are not influenced by power failure.

The invention discloses an engine camshaft for a gerontic motor tricycle. A connecting line of a center O of an air inlet cam (2) and a starting point A of a cam contour is on a first straight line L1; a connecting line of the center O of the air inlet cam (2) and an end point B of the cam contour is on a second straight line L2; a connecting line of the center O of the air inlet cam (2) and the outmost edge point C of a flange of the air inlet cam (2) are on a third straight line L3; an inclined angle a which is more than or equal to 92 DEG and is less than or equal to 98 DEG is formed between the first straight line L1 and the third straight line L3; an inclined angle b which is more than or equal to 86 DEG and is less than or equal to 92 DEG is formed between the second straight line L2 and the third straight line L3; and lift data of an exhaust cam is completely the same as that of the air inlet cam, and only the direction of the exhaust cam is opposite to that of the air inlet cam. In the invention, an inclined angle and a lift curve (the cam contour) of a distribution cam is changed, so that the conventional horizontal type engine can meet the using requirements of large medium-low-speed torque, a low temperature, low oil consumption, low noise, high reliability, high durability and the like of the gerontic motor tricycle.