66results about How to "Improve driving feeling" patented technology

The invention relates to a virtual reality technology-based automobile driving simulation training system. The virtual reality technology-based automobile driving simulation training system includes the following steps that: step 1, data acquisition: construction data and related geographic information of a virtual environment requiring to be established are acquired; step 2, scene modeling: useful information is extracted from related data so as to establish a 3D model of a training field; step 3, visual effect: related data are utilized to realize traffic scenes under different weather conditions, so that emergency-responding ability of a user under different environments can be exercised; step 4, visual simulation: the user puts on a helmet, and a computer is started to generate the virtual environment, and the virtual environment is displayed on a display screen of the helmet, so that the user be personally on a scene; step 5, movement simulation: 3D virtual scenes are generated according to the operation of a driver and road conditions of visual simulation, so that virtual simulation can be realized; step 6, collision detection: collision between automobiles and simulation objects is calculated; and step 7, a hardware system: various kinds of operations of the driver are acquired through the sensor, and corresponding sensory stimulation is transferred to the user.

A vehicle propulsion system and a method of its operation are described. As one example, the vehicle propulsion system includes a plug-in hybrid electric vehicle. The method may include starting the engine responsive to different criteria, including criteria related to potential degradation effects that may occur due to excessive durations of engine off vehicle operation.

The invention discloses an automatic gear-shifting control method and system for a two-gear transmission of an electric vehicle, and belongs to the technical field of electric vehicle gear-shifting control. The automatic gear-shifting control method comprises the specific steps that whether the gear-shifting condition is met or not is judged, if the gear-shifting condition is met, the gear-shifting mode is conducted, and transmission control unit (TCU) replaces a vehicle controller to control a driving motor controller, so that torque of the driving motor is reduced to zero torque according toa certain curve; in the zero torque, the TCU controls a gear-shifting executing mechanism to shift a gear down to a neutral gear; in the neutral gear, control torque is determined through the TCU byutilizing a certain algorithm, so that the rotating speed of a driving motor is adjusted to the target speed; After the target speed is reached, the TCU controls the gear-shifting executing mechanismto shift gear; a non-gear-shifting mode is conducted, torque is slowly increased to the torque corresponding to an accelerator signal according to a certain curve; torque reducing and torque increasing are conducted according to the certain curve, and the speed is adjusted through the TCU by using a torque mode, so that the speed adjusting time is reduced, quick gear shifting is achieved, abruptness caused by power interruption during gear shifting can be effectively alleviated, and the driving feeling is improved.

A control unit sets a front-end collision risk of a subject vehicle against a front vehicle in accordance with a time headway of the subject vehicle and a margin time to front-end collision of the subject vehicle, and a rear-end collision risk of the subject vehicle by a rear vehicle in accordance with a time headway of the rear vehicle and a margin time to rear-end collision of the subject vehicle, the margin time to rear-end collision having a larger weight than that of the margin time to front-end collision in the front-end collision risk against the front vehicle. Brake control and alarm control are performed in accordance with the front-end collision risk against the front vehicle and the rear-end collision risk by the rear vehicle.

The invention relates to an accelerator pedal and brake pedal-based electrically driven automobile feedback brake control method, which comprises the following steps of: (1) arranging an electrically driven automobile feedback brake control system comprising a vehicle controller, a wheel speed sensor, an accelerator pedal displacement sensor, a pressure regulator, a main cylinder pressure sensor, a front wheel cylinder pressure sensor and a brake pedal switch; (2) judging, by the vehicle controller, braking intention of a driver according to a current operation state of the automobile, dividing brake feedback control into three stages, i.e., an accelerator pedal-based feedback control stage, a brake pedal-based feedback control stage and a control stage of a switching process from accelerator pedal-based feedback to brake pedal-based feedback; and (3) calculating, by the electrically driven automobile feedback brake control system, motor feedback braking force of the three feedback control stages respectively, thereby keeping the vehicle total brake force consistent with the driver brake requirement. The accelerator pedal and brake pedal-based electrically driven automobile feedback brake control method can be widely applied to electrically driven automobile feedback brake control of a pure electric vehicle, a hybrid electric vehicle and the like.

In one example, a method for controlling powertrain operation in a vehicle is provided, the powertrain having an engine and an automatic transmission, the engine having at least an electrically actuated cylinder valve. The method includes changing gears from a first discreet gear ratio to a second discreet gear ratio of the transmission; and increasing engine torque during a torque phase of said gear change by changing operation of the electrically actuated cylinder valve, and decreasing engine torque during an inertia phase of said gear change.

The invention provides a vehicle working mode switching method and a vehicle working mode switching system of a hybrid electric vehicle. The method comprises the steps of receiving a mode switching control signal and a clutch closing control signal sent by a vehicle controller when the vehicle is required to be switched to a parallel mode from a series mode; sending a mode switching in-progress marking signal to the vehicle controller; controlling an ISG motor to work in a rotation speed control mode, and adjusting the speed of the ISG motor by taking the rotation speed of a drive motor as the target; controlling the ISG motor to work in an idle mode; controlling the clutch to be combined; sending a clutch closed state signal to the vehicle controller. The vehicle working mode switching method and the vehicle working mode switching system of the hybrid electric vehicle have the advantages that the technical problems of long interruption time of power and great wear of the clutch in mode switching caused by a fact that rotation speeds of the ISG motor and the drive motor are synchronized through a sliding membrane of the clutch in mode switching of the existing hybrid electric vehicle are solved, and the active speed adjusting process of the ISG motor and the drive motor is added before the clutch is combined, so that the mode switching time is shortened and the smoothness in the process of mode switching is improved.

A method for controlling cycling of an air conditioning compressor coupled to an internal combustion engine interrupts normal cycling based on operation conditions. In addition, normal engaged and disengaged cycling durations are adaptively estimated in real-time. The method of the present invention achieves improved fuel economy and improved drive feel. As an example, improved fuel economy is achieved by engaging the compressor during braking or when the engine is being driven by the vehicle. As another example, improved drive feel is achieved by engaging the compressor during transient conditions when drive feel is unaffected.

The invention discloses a vehicle operating function hinting method and system and a vehicle. The vehicle operating function hinting method includes active learning steps. The active learning steps include the steps that a vehicle system is switched into an active learning status, and an engine of the vehicle is closed; a triggering signal of any one of operating mechanisms in the vehicle is received; first operating function guide information of the operating mechanisms corresponding to the received triggering signal is produced, and the operating function achieved by triggering the operatingmechanism is hinted by the first operating function guide information; and the triggered first operating function guide information of the operating mechanism is output. According to the vehicle operating function hinting method and system and the vehicle, vehicle users can learn usage method of the operating functions of the vehicle conveniently and fast without the need for looking up complicated paper vehicle operating instruction, time spent by the users is short, comprehension of the users is full and accurate, the humanization is achieved, so that the users can have a better driving feeling, and the user experience is greatly improved.

The invention discloses an automobile electro-hydraulic intelligent steering system and a multi-target optimization method thereof. The system comprises a mechanical steering module, an electric powerassisting module, an electric hydraulic power assisting module and a control module. The system can intelligently select the power-assisted steering participation proportions of the electric power assisting module and the electric hydraulic power assisting module. According to a mechanical, electric and hydraulic complex coupling relationship existing in the system, the multi-target optimizationmethod is proposed, through parameter coupling analysis, key design variables greatly affecting the performance of the system are selected, a multi-target particle swarm algorithm based on the sharedniche technology is adopted for optimization, optimal design parameters are obtained, performance optimum of the steering road sense, steering energy consumption and steering power assisting is achieved, and the overall performance of the steering system is improved.

The invention relates to an electric vehicle brake intention recognizing method based on states of an accelerator pedal and a brake pedal. The method includes the steps of collecting displacement andspeeds of the brake pedal and the accelerator pedal respectively, obtaining the vehicle speed and battery state of charge (SOC) parameter value in real time, establishing a brake intention recognizingmodel including the acceleration mode, the sliding mode, the regenerative brake mode and the emergency brake mode, defining the displacement threshold value A1 of the accelerator pedal, entering theacceleration mode when the displacement of the accelerator pedal is larger than A1, entering the regenerative brake mode when the displacement of the accelerator pedal is smaller than A1, entering thesliding mode when the displacement and speeds of the accelerator pedal and the brake pedal are zero, defining the brake strength of the brake pedal, entering the regenerative brake mode when the brake strength is smaller than 0.7, otherwise entering the emergency brake mode, extracting feature vectors of the brake pedal after conducting Hilbert-Huang conversion on travel signals of the brake pedal, and recognizing the regenerative brake intention through a cluster recognizing algorithm.

A controller controls a first FET to go on and off based on an input signal of a trigger switch and a push switch and controls a second FET to go on and off based on an input signal of a trigger switch, a push switch, and a operation detection switch. The controller then controls the time that the first FET is on for to be longer than the time the second FET is on for.

A control system in a vehicle in which at least one pair of driving power transmission members are engaged with each other with a slack on a driving power transmission path, comprises an input shaft rotational speed detector for detecting a rotational speed of an input shaft located upstream of engaged portions of the driving power transmission members in a direction in which the driving power is transmitted, a determiner for determining whether or not the driving power transmission members are in a non-contact state at the engaged portions for a period of time based on a change rate of the detected input shaft rotational speed, and a controller for controlling the vehicle to reduce a rotational speed difference between the input shaft and an output shaft located downstream of the engaged portions, when the determiner determines that the driving power transmission members are in the non-contact state.

A managing method for the output power of power system of the car with mixed features that the total output torque on the output axle of speed variator, which is required by the driver, is calculated by the vehicle control unit according to speed and the openness of acceleration pedal, and then is distributed to engine and motor according to the share coefficient of engine.

The invention discloses a control device and method for a wheel type mechanical hydraulic travelling system. Based on a control unit, state quantities including pressure, rotating speed, electric currents, positions and the like are detected, a first magnetic valve, a second magnetic valve and a third magnetic valve are controlled, besides, a damping device is additionally arranged on a pilot oil line, and too big impact during starting and stopping is avoided. An accelerator pedal and running speed are in real-time matching, so that the maneuvering flexibility is improved, and maneuvering comfort and driving feeling are enhanced; the throttling losses when a running control valve is not fully opened are reduced, energy is saved, and the control response speed is increased; control on manual switch and automatic switch under various travelling operating conditions is realized, the trouble that a manipulator frequently adjusts various travelling modes is reduced, and the operation fatigue feeling is reduced; pressure impact during starting and stopping is reduced, and better comfort is achieved.

A driving control method for a hybrid vehicle has state of charge (SOC) ranges including a high SOC range, an intermediate SOC range and a low SOC range, and a plurality of power distribution strategies corresponding to the respective SOC ranges. The driving control method controls the hybrid vehicle using a power distribution strategy corresponding to an SOC range to which a current SOC of the hybrid vehicle belongs. When a speed of the hybrid vehicle is high or low and is outside a predetermined range, boundary values of the intermediate SOC range and the low SOC range among the SOC ranges are increased.

The invention discloses a drive control method for a hybrid vehicle. The drive control method has SOC (state of charge-charge state) areas which include a high SOC range, a normal SOC range and a low SOC range, and the respective target engine torque corresponding to each SOC area. The drive control method comprises: calculating a target engine torque based on a current SOC; reducing the target engine torque, if the current SOC is greater than a predetermined range; and enhancing the target engine torque, if the current SOC is lower than the predetermined range.

A hybrid vehicle includes an engine, a first motor, a planetary gear mechanism, a second motor, a battery, and an electronic control unit. The electronic control unit is configured to: control the engine, the first motor, and the second motor such that the hybrid vehicle travels using a required driving force; set a target rotation speed on a basis of the depression amount of the accelerator pedal, the vehicle speed, and a shift stage such that the target rotation speed of the engine increases as the depression amount of the accelerator pedal increases; set an upper-limit driving force; and control the engine, the first motor, and the second motor such that the engine operates at the target rotation speed and the smaller driving force of the upper-limit driving force and the required driving force is output to the drive shaft.

The invention relates to a motor controller overload protection method and a motor controller overload protection system, which belong to the field of new energy automobile motor control technologies. The motor controller overload protection method comprises the steps of: detecting an output current of a motor controller, judging duration of the output current when an output current value is greater than a rated value, confirming whether overload is real, and achieving a ladder form derating measure through limiting current and judging the duration when an overload state is about to be reached, thereby preventing an overload power off protection state from being reached. The motor controller overload protection method and the motor controller overload protection system can allow a motor to reduce torque more smoothly in an overload state, have obvious buffer function for the overload state, effectively improve driving feeling of a new energy automobile, are free of sudden interruption of power, can reduce destructive effect of the motor in the overload state, prolong the service life of the motor, and enhance safety of vehicle driving of a driver.

The invention discloses a hydraulic power assisted diverter of a circulating ball with a floatable piston. The hydraulic power assisted diverter of the circulating ball with the floatable piston comprises a valve assembly, a rack piston, a shell and an output shaft. The valve assembly is provided with a screw, and the rack piston is sleeved on the screw. The hydraulic power assisted diverter of the circulating ball with the floatable piston is characterized in that a sealing sliding sleeve is arranged between the end of the rack piston close to the valve assembly and the screw, while a nut is arranged between the other end of the rack piston and the screw. The nut is in clearance fit with the rack piston, and the nut is fixedly arranged on the screw through a steel ball, a ball steel conduit and a conduit hoop. The nut rotates relative to the screw. According to hydraulic power assisted diverter of the circulating ball with the floatable piston provided by the invention, a spiral rollaway nest and the piston are processed independently, so that the hydraulic power assisted diverter of the circulating ball with the floatable piston is simple in process, and when the oil pressure is raised, the spiral rollaway nest is not easy to deform, and the flowing capacity of the steel ball does not deteriorate.

The invention discloses a hybrid power transmission which comprises an engine, a clutch, a first motor, a second motor, a gear set, a synchronizer, an input shaft and an output shaft. The clutch is used for combining or cutting off power transmission between the engine and the input shaft; a motor shaft of the first motor is connected with the input shaft or a flywheel output end of the engine through gear transmission; the shift gear set comprises at least two groups of driving gears and driven gears which are meshed with each other, the driving gears are hollowly sleeved on the input shaft, and the driven gears are sleeved on the output shaft; a motor shaft of the second motor is fixedly connected with one of the driving-gear gears through a shaft sleeve which is hollowly sleeved on the input shaft; the synchronizer is used for selectively combining or cutting off power transmission in the direction from the input shaft and the gear gear set to the output shaft. According to the hybrid power transmission, high-efficiency output of the transmission under the conditions of low, medium and high vehicle speeds and various loads is achieved, the structure is simple, and space arrangement is compact.

A slip suppression control system for a vehicle, includes a controller configured to execute traction control for reducing a driving power of a drive wheel when a predetermined start condition is satisfied, and an ON / OFF input device which is configured to switch between a permission state in which the traction control is enabled and an inhibiting state in which the traction control is disenabled. The controller is configured to restrict switching from the permission state to the inhibiting state, in response to a command for switching from the permission state to the inhibiting state which is input to the ON / OFF input device, when a first condition including a condition that the traction control is being executed is satisfied.

The invention is implemented using a control system composed of an entire car controller, a motor and its controller, and a battery and its management unit. It features following points: the maximum output torque of motor continuously and smoothly varies between 0 and maximum designing value along with rotate speed and SOC such that in the process of car running the dropping down of driving power can never be happened and the SOC can not drop to the extreme case.

A drive control system is provided, which is mounted on a vehicle configured to travel by operation of a driver. The drive control system includes an actuator configured to output a driving force for the vehicle to travel, an output sensor configured to detect a driving force requested by the operation of the driver, and a control device configured to control operation of the actuator based on the requested driving force detected by the output sensor. The control device sets a target output value by adding a given delay time to a requested output value set corresponding to the requested driving force, and controls the actuator so as to output the target output value based on a response characteristic of the actuator.