39results about How to "Taking into account the power" patented technology

The invention relates to an electro-hydraulic automatic shift transmission case control device and method in engineering machinery. The device comprises an engine speed sensor, a torque converter turbine speed sensor, an engine throttle opening sensor, a vehicle speed sensor, a vehicle master controller, an engine throttle execution mechanism, an automatic shift transmission case and an electronic controller. The engine speed sensor, the torque converter turbine speed sensor, the engine throttle opening sensor and the vehicle speed sensor input signals to the electronic controller. The electronic controller is communicated with the vehicle master controller. The vehicle master controller inputs control signals to the engine throttle execution mechanism. The electronic controller inputs the control signals to the automatic shift transmission case. The invention uses different shift modes according to the intention of a driver, realizes the transmission shift of hydraulic engineering machinery in proper time, and ensures the economical efficiency, power efficiency and practicability of the vehicle. During the shifting process, the invention can ensure good gear shifting performance by controlling the engine and improve the comfort of passengers.

The invention relates to a hydraulic mechanical transmission engineering machine automatic gear shifting device and a control method, comprising an electrohydraulic gear shifting device, a microcomputer controller, an engine rotation speed sensor, and a gearbox output rotation speed sensor, a gear shifting handle switch, a gear shifting mode selection switch, an electric control gun position potentiometer and an automatic mode direction switch; the engine rotation speed sensor, the gearbox output rotation speed sensor, the gear shifting handle, the gear shifting mode selection switch, the electric control gun position potentiometer and the automatic mode direction switch input signals to an input port of the microcomputer controller which controls the signals to be output to a gearbox control module through an output port. The invention adopts two gear shift combination, has economics, power and practicability, and reaches the object of saving energy; the automatic gear shifting leads the engineering machine to improve the working efficiency, save the working time, reduce the labor intensity of the drivers, and be suitable for different working conditions.

The invention discloses a preparation method for a quasi-vertical-structured GaN-based schottky diode, and belongs to the technical field of a semiconductor device. A highly-doped N-type GaN layer is grown on a growth substrate in an epitaxial way; a highly-doped N+ GaN layer is grown on the N-type GaN layer in an epitaxial way; ohmic contact is formed on the N+ GaN layer; and schottky contact is formed on an N- layer, and schottky contact is led to a positive electrode through an air bridge. By virtue of the preparation method, the series resistance of the device can be lowered, working frequency can be improved, and the problem of current crowding can be solved.

The invention relates to a hybrid electric vehicle transmission device. The hybrid electric vehicle transmission device comprises a planetary gear coupling mechanism, wherein the planetary gear coupling mechanism comprises a single-planetary row and a double-planetary row, the single-planetary row comprises a first sun wheel, a first planet gear, a first planet carrier and a first gear ring, and the double-planetary row comprises a second sun wheel, an inner planet wheel, an outer planet wheel, a second planet carrier and a second gear ring. An input shaft is used as the first transmission shaft, the two sun wheels are connected with each other and then connected with a rotor shaft of a second motor, and a second transmission shaft is constituted. The two planet carriers are connected to constitute a third transmission shaft, the first gear ring is connected with a rotor shaft of a first motor to constitute a fourth transmission shaft, and the second gear ring constitute an output shaft. The input shaft is connected to the output end of an engine through a torsional shock absorber. The first motor is connected to one end of a first brake, and a transmission housing is connected tothe other end of the first brake. The second motor is connected to one end of a second brake, and the transmission housing is connected to the other end of the second brake. By using the embodiments of the hybrid electric vehicle transmission device, the device structure can be optimized, and the transmission efficiency is improved.

The invention discloses an advanced commercial vehicle gear shifting reminding control method, belongs to the technical field of gear shifting control. The advanced commercial vehicle gear shifting reminding control method mainly solves the technical problem that an existing gear shifting reminding method frequently reminds of gear increase and decrease, and the method comprises the following steps that S1, when the vehicle speed is smaller than a threshold value, the rotating speed of an engine and the maximum torque of the engine after gear increasing are calculated, and if the rotating speed of the engine and the maximum torque of the engine meet requirements, a driver is reminded to conduct gear increase; and S2, when the vehicle speed is not smaller than the threshold value, the rotating speed of the engine, the maximum torque of the engine and the specific fuel consumption at each gear are calculated, and a first small-specific-fuel-consumption gear, a second small-specific-fuel-consumption gear and a third small-specific-fuel-consumption gear are obtained, wherein an optimal gear is selected from the first small-specific-fuel-consumption gear, the second small-specific-fuel-consumption gear and the third small-specific-fuel-consumption gear, and the driver is reminded to switch to the optimal gear. The invention also discloses a control system for realizing the method. The advanced commercial vehicle gear shifting reminding control method and system can give consideration to power performance and fuel economy, and frequent reminding of gear increase and decrease is avoided.

The invention discloses a hybrid power system and a control method thereof. The hybrid power system comprises a first motor, a second motor, a battery pack, a first planet row, a second planet row, a first gear pair, a second gear pair, a first input shaft, a second input shaft, a third input shaft, a first engaging sleeve, a second engaging sleeve and the like. By sequentially connecting and controlling combination and withdrawing of the first engaging sleeve and the second engaging sleeve, the hybrid power system has various working modes which include a pure electric driving mode, two parallel driving modes, a series-parallel driving mode and an energy recycling mode, the defects that the working efficiency of an engine is low in a pure torque coupling mode, and the power performance is insufficient in the pure rotation speed coupling mode are overcome, and the economical efficiency of fuel and the power performance are ensured at the same time. According to the hybrid power system, the engaging sleeves which are simple in structure are adopted, compared with adoption of a friction clutch, the hybrid power system is more compact in overall structure, meanwhile slide-friction energy loss generated by the friction clutch can be avoided, and the overall efficiency of the system can be improved.

The invention relates to a power driving device of double motors and a torque distribution control method thereof. Motor working points are adjusted according to the power needed by a vehicle, energymanagement is reasonably executed, meanwhile single-motor braking energy recovery and double-more braking energy recovery can be achieved under different braking power, and the economic efficiency ofthe vehicle is improved. The minimum power evaluation index is proposed according to double-motor coupling characteristics to serve as an evaluation criterion of vehicle mode switching, and the two motors work at the best working points according to vehicle-needed power adjusting working modes and give consideration to the power and economic efficiency of the vehicle. The corresponding process isaccelerated in the whole vehicle control process, the corresponding powers in all modes and the rotation speeds and torques of the motors are calculated according to the characteristics of the main motor and the auxiliary motor, the data is stored in a storage unit in a form way, the corresponding working modes are quickly identified in a table lookup way in actual operation of the vehicle, and the response speed of the whole vehicle is improved.

The invention relates to a tempering prevention and abnormal combustion restraining method of a hydrogen fuel combustion engine, a prevention method uses at least two ways of hydrogen spraying devices to spray hydrogen, and the hydrogen spraying devices adopt a sectional operating mode to spray hydrogen; when the hydrogen spraying devices spray hydrogen at the early stage, an intake valve is opened to delay some time to spray n; and the terminal time of the hydrogen spraying is fixed on the moment of starting closing the intake valve. The tempering prevention method decay time spraying hydrogen of the hydrogen fuel combustion engine provided by the invention has the advantages of avoiding hydrogen spraying from happening in a valve overlap at the air inflow starting moment, reducing the residence time of the hydrogen in an intake tube as far as possible, and reducing the litten probability of a gas mixture and reducing the probability of the tempering through an air inflow cooling inlet manifold internal hot point; fixing the hydrogen spraying manner of each way of most length hydrogen spraying extended period no matter what load size, and ensuring not to close to the overlap partat the open front end of the inlet valve at the starting moment of each way of hydrogen spraying; and effectively preventing the tempering, combining the adjusting ignition, and effectively restraining abnormal combustion.

The invention discloses a dual-motor integrated driving system of an electric vehicle, and belongs to the technical field of driving systems of electric vehicles. The driving system comprises a casing, a dual-motor assembly and a control assembly; the dual-motor assembly includes a motor I and a motor II connected through a synchronizer; the motor I is relatively big in size; the control assemblyis arranged at the top parts of the motor I and the motor II; the control assembly comprises an insulated gate bipolar translator (IGBT) power unit I and an IGBT power unit II correspondingly used forsupplying power for the motor I and the motor II; the IGBT power unit I is arranged above the motor II; and the IGBT power unit II is arranged above the motor I. The driving system has the beneficialeffects that the dual-motor assembly and the control assembly are integrated in the casing, and the structural difference of the dual-motor assembly is fully utilized to arrange the control assembly,so that the space is fully utilized, and the whole vehicle layout is facilitated; and heat emission can be performed simultaneously on the dual-motor assembly and the control assembly through a designed water cooling assembly, so that the integral heat emission efficiency is increased.

The invention relates to a partition-type engine cover outer plate, in particular to a bionic partition-type engine cover outer plate with an olecranon characteristic for a sportscar. The engine cover outer plate adopts a bionic design idea; an olecranon with favorable air adhesion decreasing and resistance reducing characteristic is used for a sportscar engine cover design, i.e., the outline curve of the engine cover outer plate is of a longitudinal-section outline bionic characteristic curve shape of the olecranon. The partition-type engine cover outer plate is capable of better achieving an enveloping effect on an engine and other parts in an engine compartment, is relatively good in heat insulation and sound insulation effects, and is simple in structure, streamline in modeling, beautiful in appearance and low in wind resistance coefficient.

The invention relates to the field of pure electric vehicles, and in particular relates to an electric driving system and an electric vehicle. The electric driving system comprises a first motor, a second motor and a speed change mechanism. The speed change mechanism comprises a differential mechanism, a gear shifting mechanism and a planetary speed reducing mechanism. A first motor shaft of the first motor is connected with a sun gear of the planetary speed reducing mechanism, and a front gear ring of the planetary speed reducing mechanism is connected with the input end of the differential mechanism. A second motor shaft of the second motor is connected with the input end of the differential mechanism through the gear shifting mechanism; the two output ends of the differential mechanismdrive wheels to rotate through a left half shaft and a right half shaft respectively. A planet carrier of the planetary speed reducing mechanism is provided with a locking clutch so as to achieve locking and unlocking of the planet carrier. When the electric driving system is used on the vehicle, the requirement for motor power is low, cost is reduced, one motor can provide torque compensation forthe other motor during gear shifting, and power interruption is avoided; and the switching of working modes can be realized through the locking clutch.

The invention discloses a control strategy of an engine with a low-pressure exhaust gas recirculation (EGR) system, and a vehicle. The control strategy at least comprises the following steps: the rotating speed and torque of the engine are detected; and the opening degree of an EGR valve is determined and adjusted according to the rotating speed and torque of the engine and the EGR rate map, the EGR rate map includes a plurality of areas, and each area corresponds to the specific EGR rate. Thus, when the engine is under different loads and torque, the EGR rate is reasonably adjusted, thus seamless switching among various EGR rate control strategies is achieved, and smooth driving is achieved on the basis of ensuring reducing of fuel consumption of the engine. Therefore, power performance of the vehicle is improved, and the power performance and smoothness of the vehicle are effectively taken into account.

The invention discloses a CVT speed reducer for a pure electric vehicle. The CVT speed reducer for the pure electric vehicle comprises an input shaft and an output shaft, and further comprises a driving wheel and a driven wheel; the driving wheel is connected with the input shaft; the driven wheel is connected with the output shaft; and the driving wheel and the driven wheel are connected througha transmission belt, and are diameter-variable transmission wheels. The CVT speed reducer for the pure electric vehicle is reasonable in structural design; a chain wheel is adjusted through a hydraulic torque converter to realize an adjustable transmission ratio; the overall vehicle dynamic property and economy can be both considered; the high-speed economy is improved; the internal structure of the speed reducer is simplified; and the vehicle advancement and retreating can be realized through forward and reverse rotation of a motor; and through enlargement of an efficient section of the driving motor, the overall vehicle endurance is improved.

The invention discloses a hybrid vehicle. The hybrid vehicle includes a drive device and a transmission device connected to the drive device, the transmission device receiving a driving force from the drive device and transmitting the driving force to at least one of a wheel and an accessory device of the hybrid vehicle. According to the hybrid vehicle, an accessory driving assembly with high output power can be arranged, and vehicle functions with various purposes can be achieved.

The invention discloses a control method and device of a dual-motor vehicle and electronic equipment. The method comprises the steps that on the basis of vehicle parameters and driving parameters which are obtained in advance, the vehicle acceleration, the road adhesion coefficient and the road slope are calculated, the driving parameters at least comprise the steering wheel rotation angle and the accelerator pedal opening degree, and the vehicle parameters at least comprise the current vehicle speed; calculating a driving stability factor based on the vehicle acceleration, the road adhesion coefficient, the steering wheel angle and the current vehicle speed; determining a target working mode based on the driving stability factor, the accelerator pedal opening degree, the current vehicle speed, the road slope and a control mode selected by a driver; and calculating a torque distribution parameter according to the target working mode and the vehicle state of the driving vehicle. The technical problem that the current electric vehicle lacks consideration on the power performance of the whole vehicle and the intention of a driver in the prior art, and the operation performance is affected is solved.