382 results about "Unsprung mass" patented technology

An adaptive electric car or other vehicle with potentially better performance—power, efficiency, range—than a gasoline vehicle, at a competitive cost. The motor control system can dynamically adapt to the vehicle's operating conditions (starting, accelerating, turning, braking, cruising at high speeds) and other inputs and parameters. That consistently provides better performance. Isolating the vehicle's motor or generator electromagnetic circuits allows effective control of more independent parameters. That gives great freedom to optimize. Adaptive motors and generators for an electric vehicle are cheaper, smaller, lighter, more powerful, and more efficient than conventional designs. An electric vehicle with in-wheel adaptive motors delivers high power with low unsprung mass and high torque and power-density. Total energy management of the vehicles entire electrical system allows for large-scale optimization. An adaptive architecture improves performance of a wide variety of vehicles, particularly those that need optimal efficiency over a range of operating conditions.

A control system for a resilient support mechanism such as a suspension mechanism of a wheeled vehicle including a damper disposed between an unsprung mass member and a sprung mass member of the vehicle, wherein a damping coefficient of the damper is divided into a linear portion and a nonlinear portion, and wherein the nonlinear portion of the damping coefficient is defined as a control input u and applied with a frequency weight Wu(s), while a vertical velocity of the sprung mass member, a relative velocity of the sprung mass member to the unsprung mass member and a vertical acceleration of the sprung mass member are defined as an evaluation output zp and applied with a frequency weight Ws(s). In the control system, a nonlinear Hinfin control theory is applied to a generalized plant to obtain a positive definite symmetric solution P and to calculate a target damping force based on the positive definite symmetric solution P and a state amount such as the vertical velocity of the sprung mass member, a relative displacement of the sprung mass member to the unsprung mass member or the like.

Improved in-wheel, near-wheel and direct-drive electric motors for cars and other vehicles. This motor can be cheaper, lighter, more powerful, more efficient, and more reliable than other direct-drive motors. Its high torque-density and high performance allow it to produce the same peak power as heavier, bigger motors. That helps greatly with the handling issues caused by too much unsprung mass. The motor control system can adapt to the vehicle's operating conditions (like starting, accelerating, turning, braking, and cruising at high speeds). That provides better performance. The motor's low-voltage, low-current design helps reduce heat and weight and leads to lower motor cost. The motor can still operate with some faults, offering “get home” capability. It offers all the benefits of in-wheel motors: efficiency, compactness, direct traction control, quiet, simple driveline. And it adds to those benefits, while reducing or eliminating the drawbacks other in-wheel motors.

An adaptive architecture for electric motors, generators and other electric machines. An adaptive electric machine provides optimal performance by dynamically adapting its controls to changes in user inputs, machine operating conditions and machine operating parameters. Isolating the machine's electromagnetic circuits allows effective control of more independent machine parameters, enabling greater freedom to optimize and providing adaptive motors and generators that are cheaper, smaller, lighter, more powerful, and more efficient than conventional designs. An electric vehicle with in-wheel adaptive motors enables delivery of higher power with lower unsprung mass, giving better torque-density. The motor control system can adapt to the vehicle's operating conditions, including starting, accelerating, turning, braking, and cruising at high speeds, thereby consistently providing higher efficiency. A wind powered adaptive generator can adapt to changing wind conditions, consistently providing optimal performance. An adaptive architecture may improve performance in a wide variety of electric machine applications, particularly those requiring optimal efficiency over a range of operating conditions.

In a suspension control system according to the present invention, a sky-hook command signal B obtained from velocity data obtained by integrating a sprung mass acceleration αu from a sprung mass acceleration sensor 9u and an unsprung mass vibration damping command signal C obtained on the basis of an unsprung mass acceleration αd detected by an unsprung mass acceleration sensor 9d are added together to obtain a control signal A for a damping characteristic inverting type shock absorber 6. The control signal A reflects the unsprung mass acceleration αd that leads in phase by 90° the piston speed. Accordingly, it is possible to compensate for a response delay due to an actuator 11, etc.

The invention discloses a bogie of a high-speed motor train unit. By adopting a brand-new bogie structure and a hanging connection and traction mode, overall lightweight design is realized, the unsprung weight of the bogie is reduced, and the hanging parameter between the bogie and a body is optimized. On the basis that the high-speed running speed is met, stability when the bogie passes through a big corner and good traction and braking performance are expected. The bogie comprises a framework, two groups of wheel set travelling devices, a linear motor, a first hanging device, a second hanging device, a traction device and a foundation brake device. The framework comprises a pair of side beam assemblies and a pair of cross beam assemblies which are connected with each other; each side beam assembly has a hollow box body structure, and comprises a pair of upper and lower cover plates and a pair of lateral web plates which are welded; each cross beam assembly comprises a pair of hollow steel pipes penetrating the lateral web plates and welded with the lateral web plates; and a pair of air spring supporting beams is welded at two ends of a steel pipe and outside the lateral web plates.

The invention relates to a vehicle pavement identification system and a suspension mode switching method and belongs to the field of automobile safety and comfort. A suspension mainly comprises sprung mass, an elastic element, a damper, a linear motor, unsprung mass, an acceleration sensor A, an acceleration sensor B, a displacement sensor A, a displacement sensor B, a current amplifier, an A / D converter, a signal storage unit, an ECU, a power amplifier and a D / A converter. The ECU (14) comprises a signal processing module, an analysis module, a judgment module and a control module, receives displacement signals and acceleration signals, measured by the vehicle sensors, of the sprung mass and the unsprung mass, grades road conditions by combining the vehicle speed and the damping coefficient and meanwhile controls the suspension by combining vehicle working conditions and switching different modes to meet the requirements of safety and comfort. According to the vehicle pavement identification system and the suspension mode switching method, the linear motor is adopted as an actuator, brake energy of the suspension can be recovered under good road conditions for supplying to other systems for using, and energy feedback performance is achieved.

A vehicle having in-wheel motors, wherein when the in-wheel motors are mounted on the vehicle driven by the torque of an internal combustion engine, the in-wheel motors (3) are mounted on wheels on one side of the vehicle opposite to the other side on which the internal combustion engine (51) is mounted. The non-rotating side of the motor and the knuckle (5) are supported by a buffer mechanism (10) having plates (11) and (12) connected to each other by a direct-acting guide (15) with springs composed of a direct-acting guide (13) comprising a linear bearing (13A) and a rod (14) and spring members 14 and 14 moving in the vertical direction of the vehicle and mated with the direct-acting guide (13) and a damper (16) for interconnecting the plates (11) and (12), moving in the vertical direction of the vehicle to support the motor (3) to either one or both of the unsprung mass of the vehicle and the car body by means of the buffer mechanism (10). Thus, the running ability and riding comfort of the vehicle having in-wheel motors can be improved.

An electromagnetic suspension system for a vehicle, comprises an electromagnetic actuator interposed between a sprung mass and an unsprung mass and disposed substantially in parallel with an spring element. An electric motor is provided for driving the electromagnetic actuator. A motor controller is configured to calculate a displacement input applied to the electromagnetic actuator and to control the electric motor in a manner that the electromagnetic actuator generates an optimum damping force corresponding to the displacement input. A motor control circuit is provided for the electric motor, through which the electric motor is connected to the motor controller. Additionally, an electrical damping element is electrically connected to the motor control circuit and in parallel with the electric motor to generate a damping force in a passive manner under a dynamic braking of the electric motor in response to the displacement input to the electromagnetic actuator from the unsprung mass.

The invention discloses a rapid freight car radial bogie. The rapid freight car radial bogie comprises an axle assembly, a frame, a swing bolster, a braking device, central suspension devices, a radial device, a side bearing device arranged on the swing bolster and an axle box suspension device, wherein the frame is installed on the axle assembly through the axle box suspension device, the two ends of the swing bolster are fixedly installed in the middle of the frame respectively through the central suspension devices, the frame is composed of two side beams and parallel cross beams connected with the side beams, and bearing platforms where the central suspension devices are installed are arranged outside the middle portions of the side beams. The rapid freight car radial bogie structure obviously reduces wheel-rail wear and wheel-rail noise, reduces wheel-rail acting force, reduces vehicle transverse vibration acceleration and improves vehicle operation lateral stability, straight line stability and curve line negotiating capacity. The unsprung mass of the bogie is reduced, the speed of the bogie is high, vehicle braking performance is improved, wheel-rail wear and wheel-rail noise are small, vehicle operation stability is good, and stability and safety are high.

An electromagnetic suspension apparatus for an automotive vehicle, employs an electromagnetic actuator interleaved between a sprung mass and an unsprung mass and arranged in parallel with a suspension spring element, and an electric motor built in the electromagnetic actuator for driving the electromagnetic actuator. A motor controller calculates a displacement input, such as a suspension stroke acceleration and a suspension velocity, transmitted to the electromagnetic actuator, and controls the motor to bring a suspension damping force closer to a desired damping force suited for the displacement input. The motor controller calculates an internal inertia force of the electromagnetic actuator, and corrects or compensates for a motor output by the internal inertia force of the electromagnetic actuator.

The invention discloses a multifunctional test bed for simulating condition by a one-quarter suspension of a vehicle, comprising a T-shaped groove base, a test bed support frame, an actuating bench assembly and a vehicle suspension assembly. The test bed support frame is arranged on one side of the T-shaped groove base; and the actuating bench assembly is arranged on the other side of the T-shaped groove base. The vehicle suspension assembly is arranged on a working disk of the actuating bench assembly; and the vibration response of a vehicle body and unsprung mass can be obtained by simulating the road surface vibration through the output of an actuating bench. The multifunctional test bed has multiple functions, can meet simulation condition tests of transverse arm type, multi-link type and Macphersan type suspension systems in the suspension forms, meet simulation condition tests of passive, semi-active and active suspension systems in the types and meet actual condition tests and pseudo-dynamic tests in the simulation modes. According to the test results, the invention not only can analyze the performance of single vibration absorber, but also can analyze the overall performance of the suspension and can verify control effects of magnetorheological semi-active suspension under different control strategies.

The invention discloses a high-stability electric wheel hub, which comprises a hanging system used for hanging a motor and a brake assembly on a wheel component, wherein the hanging system comprises a shock absorber which is arranged between the wheel component and the motor as well as the brake assembly and is used for absorbing shock in the vertical direction; and the degree of freedom of the up and down relative movement exists between a motor rotor and a wheel. The unsprung mass of a vehicle is reduced by the high-stability electric wheel hub, so that the harshness, the comfort and the safety of the vehicle are improved, the eccentric wear and the larger shock impact of the motor and the brake assembly are prevented, the abnormal operation of the motor caused by shock is avoided, and the service life of the motor of the vehicle is prolonged; and because the shock of the brake assembly is reduced, the wheel hub has obvious effects of balancing braking force and guaranteeing uniform friction in a braking process, the service life of a braking device is prolonged, and the braking safety is guaranteed. According to the high-stability electric wheel hub disclosed by the invention, space is fully used, the structure of the wheel hub is compact, and compared with those of the electric wheel hub of the prior art, the stability and the harshness index of the electric wheel hub disclosed by the invention are greatly improved.

A vehicle stability control system is provided, which includes a movable tongue member and a ratchet mechanism. The movable tongue member is adapted to move between a first tongue position and a second tongue position. The ratchet mechanism is adapted to be mechanically coupled to a movable unsprung mass portion and to a sprung mass portion of a vehicle when the vehicle stability control system is operably installed on the vehicle. The ratchet mechanism comprising a ratchet tooth, such that the ratchet mechanism, is adapted to restrict a movement of the unsprung mass portion away from the sprung mass portion when the tongue member is moved toward the second tongue position and into the ratchet tooth, and wherein the tongue member does not restrict the movement of the unsprung mass portion relative to the sprung mass portion when the tongue member is in the first tongue position.

The invention discloses a control method for a multi-mode shock absorber of a vehicle and belongs to the field of energy conservation and emission reduction of vehicles. An ECU (Electronic Control Unit) controller judges driving road conditions through a vehicle signal acquired by a sprung mass acceleration sensor and an unsprung mass acceleration sensor, and further, a suspension is in active, semi-active and passive vibration damping modes through controlling the input current of a linear motor three-phase winding coil circuit and an excitation coil circuit in a magnet-rheological shock absorber, so that the vehicle can control the suspension at any moment when being under different road conditions to achieve a better riding comfortableness. Meanwhile, part of vibration energy of the suspension can be recovered by utilizing a linear motor when the suspension is in passive and semi-active modes, so that the organic combination of vibration isolation and energy feedback of the suspension is realized, and the purposes of energy conservation and emission reduction are achieved.

An active suspension system suitable for use with a vehicle, includes a passive suspension element with a first end adapted for rigid engagement to a sprung mass of the vehicle and a second end adapted for rigid engagement to an unsprung mass of the vehicle. Also included is an active suspension element with a linear switched reluctance actuator which has a first end adapted for rigid engagement to the sprung mass of the vehicle and a second end adapted for rigid engagement to the unsprung mass of the vehicle.

The invention discloses a structure and method for reducing the equivalent unsprung weight of a wheel electrically-driven system of a single trailing arm type suspension, which is characterized in that an elastic rubber hinge is supported on a frame, one end of a swing arm of the single trailing arm type suspension is connected with the elastic rubber hinge, and the other end of the swing arm is connected with a reducer casing; the reducer casing is connected with a sleeve of a half axle; a motor is fixedly arranged on the reducer casing, the power output end of the motor is connected with a small gear, then the small gear is meshed with the large gear, and the large gear is connected with the sleeve of the half axle; and after the gear reducing is performed, the power is outputted to a rim by the half axle so as to drive wheels. The equivalent unsprung weight is reduced by reducing the distance between the mass centre of non-concentric parts of a wheel and a central swing axis of the single trailing arm type suspension. The structure and method disclosed by the invention have the advantages of increasing the vibration frequencies of wheels, reducing the resonance, reducing the impact and vibration from road surfaces, and improving the running smoothness of vehicles.

The invention discloses a multi-mode electromagnetic energy-regenerative vehicle active suspension actuator. The multi-mode electromagnetic energy-regenerative vehicle active suspension actuator comprises an actuator main body and an actuator controller, wherein the actuator main body comprises a piston cylinder, a permanent magnet linear motor module, an adjustable damping vibration absorber module, an actuator upper end cover and a lower lifting lug. The permanent magnet linear motor module comprises a secondary piston rod, a linear motor upper end cover, a linear motor lower end cover, a plurality of silicon steel sheets, a plurality of primary coils and a permanent magnet; the adjustable damping vibration absorber module comprises a vibration absorber piston rod, a sleeve, an upper lifting lug, a sealing separation plate, a big piston, a small piston, a damping liquid passage and a proportional electromagnetic valve; and an input end of the actuator controller is connected with an acceleration sensor, a sprung mass speed sensor and an unsprung mass speed sensor. The invention further discloses a control method for the multi-mode electromagnetic energy-regenerative vehicle active suspension actuator. The invention is advantaged in that the energy-regenerative efficiency of the multi-mode electromagnetic energy-regenerative vehicle active suspension actuator is high, the service life of a vehicle-mounted storage battery can be effectively prolonged and an active suspension is in an optimal vibration absorbing state.

The invention relates to a stiffness-variable electromagnetic energy feedback suspension, and belongs to the technical field of novel suspensions of vehicles. The stiffness-variable electromagnetic energy feedback suspension comprises an upper hanging lug, a lower hanging lug, a motor shield, a motor fixing plate, an upper bracket, a middle bracket, a lower bracket, a spring A, a spring B, a stator base, a damping-adjustable device and an energy feedback device. A piston rod is fixed with a sprung mass through the motor fixing plate, the motor shield and the upper hanging lug; a stator is fixed with an unsprung mass through the stator base and the lower hanging lug; the spring A is in parallel connection with the damping-adjustable device; the stiffness characteristics of a system can changed by adjusting the opening of a throttle hole in the damping-adjustable device; the energy feedback device comprises the stator, an armature winding and a permanent magnet; when the suspension vibrates, the energy feedback device is driven to generate electricity, vibration energy is converted to electrical energy, and energy recovery is achieved.

The invention relates to an unequal double-wishbone suspension wheel side driving device capable of achieving large-angle steering and belongs to the field of electric automobiles. The unequal double-wishbone suspension wheel side driving device capable of achieving large-angle steering comprises an unequal double-wishbone suspension, a driving motor, a steering motor, a universal transmission shaft, a worm and gear reducer, a bevel pinion, a transmission bevel gear, a bevel gear wheel, a brake caliper, an axle housing and wheels, wherein the driving motor and the steering motor are both fixedly arranged on an automobile frame; the driving motor drives the wheels to rotate through the universal transmission shaft and gear transmission; the bevel gear wheel simultaneously plays the role of a brake disc; and the steering motor achieves steering of automobiles through the universal transmission shaft and the worm and gear reducer; the transmission bevel gear is sleeved on a master pin in empty mode; and a worm gear is connected with the master pin through a flat key. When automobiles steer, mutually independent operation of a driving system and a steering system can be achieved by reasonably controlling the rotate speed of the driving motor. The unequal double-wishbone suspension wheel side driving device capable of achieving large-angle steering not only achieves large-angle steering, but also reduces the unsprung mass of the automobiles, and improves the flexibility of the automobiles and riding comfort.

A suspension system for wheeled vehicles, particularly trailers, that is mounted underneath the vehicle frame and forward of the axle (in case of a single axle suspension) and both forward and rearward of axles (in case of a tandem axle suspension). The suspension system at each side of the vehicle frame comprises a hanger, a control arm and an elastomer spring. The hanger has a support bracket and a hanger channel and is the frame bracket connecting the suspension to the vehicle frame. The elastomer spring biases the control arm and the hanger and therefore isolates the vibration of the suspended portion of the vehicle (the sprung mass) from that of the axle(s) and wheels (the unsprung mass).

The invention relates to a novel electric motor car double trailing arm type suspended frame wheel side driving structure. A double trailing arm type suspended frame is adopted, the upper trailing arm and the lower trailing arm are parallel and have equal length, thereby the upper trailing arm and the lower trailing arm, a main pin and a connecting wire of the upper trailing arm, the lower trailing arm and a car frame hinged joint are formed into a parallelogram mechanism in the side plan of the car body. Simultaneously, a motor output axle and a wheel axle are respectively installed in the center positions of the both vertical sides of the parallelogram, and during the up and down movement of the suspended frame, the distance between the wheel axle and the motor output axle is always remained unchanged. A motor is directly installed on the car frame, the transmission between the motor and the car wheel is realized through belt transmission or chain transmission, simultaneously the effects of speed reducing and torque increasing are achieved, also a high-speed inner rotor motor is convenient to be adopted to obtain high specific power, and simultaneously the decelerator which is commonly used in the electric wheel of the inner rotor motor is omitted. The structure overcomes the disadvantage of the over weight mass of the electric wheel spring, and simultaneously the motor obtains large design spaces in the structure, installation and arrangement.

The invention discloses an inner vibration absorbing device of a high-speed electric wheel. The inner vibration absorbing device of the high-speed electric wheel comprises a damping vibration absorber and a spring vibration absorber. The damping vibration absorber comprises a damper shell body and a supporting rod, wherein a damping disc is arranged on the supporting rod. The invention further discloses the electric wheel. The electric wheel comprises a wheel shaft and a motor stator, wherein the damper shell body is fixed to the wheel shaft, and a sleeve seat and a guide seat are respectively and fixedly connected with the motor stator. According to the inner vibration absorbing device of the high-speed electric wheel and the electric wheel, a wheel hub motor and a brake are connected to the wheel shaft through the inner vibration absorbing device, acting force and counter-acting force between the wheel shaft and the motor are transmitted through the inner vibration absorbing device, the smoothness and comfort in the process when the motor drives an electric car are largely improved, the work environment of the wheel hub motor is improved, the mass of the wheel hub motor and the brake can also play a role of the damping vibration absorber, and the adverse effect caused by increase of the mass under a spring is eliminated. In addition, the damping vibration absorber and the spring vibration absorber are integrated, so that the inner vibration absorbing device of the high-speed electric wheel and the electric wheel are compact in structure, small in size and light in weight.

The invention relates to a double-T-shaped framework elastic hinging flexible suspension direct driving radial steering frame, which comprises a steering frame framework, a shaft box device (4) and two permanent magnet direct driving motors (3), wherein the shaft box device (4) is used for positioning wheel pairs (5); the permanent magnet direct driving motor (3) is used for driving the wheel pairs (5); the steering frame framework is a double-T-shaped elastic hinging framework with the flexible function; each of the two permanent magnet direct driving motors (3) is arranged on a steering frame framework through a three-point type suspension mechanism, and respectively drives one wheel pair (5). Compared with the prior art, the double-T-shaped framework elastic hinging flexible suspension direct driving radial steering frame has the advantages that the flexible function of the steering frame is good; the adapting route twisting capability is high; the unsprung mass is light; the operation noise is low; the active radial function is realized, and the like.

A sensor system for motion control of a moving unit such as a vehicle, which is comprised of a uniaxial physical value sensor having a single detection axis and the uniaxial physical value sensor being installed in a unsprung mass of a suspension device provided in the moving unit, wherein the detection axis of the uniaxial physical value sensor and the working axis of a vibration-buffering member provided on the suspension device are approximately parallel.

The invention discloses a compound damping adjustable self-energy-supply type active suspension actuator. A system of the actuator comprises an actuator body and an actuator control system. The actuator body comprises a working cylinder, an oil storage cylinder, an upper sealing end cover, an electromagnetic compression valve, a compensation valve, a hollow piston rod, a direct current brushless motor, a piston, an electromagnetic rebound valve and a circulating valve; the actuator control system comprises the actuator controller and an electric energy storage circuit; the input end of the actuator controller is connected to a unsprung mass speed transmitter and a sprung mass speed transmitter; the electric energy storage circuit comprises a rectifier, a first energy fed branch and an energy fed adjusting circuit connected to the rectifier as well as a second energy fed branch and a third energy fed branch connected to the energy fed adjusting circuit in circuit; the invention also discloses a control method of the compound damping adjustable self-energy-supply type active suspension actuator. The actuator disclosed by the invention is fast in active control respond speed, preciseto control, more in electric energy generated by fed energy, high in energy conversion ratio and wide in application prospect.

A method of limiting expansion of a spring member on a vehicle, wherein the spring member is biased between a sprung mass portion of the vehicle and an unsprung mass portion of the vehicle is provided. This method includes the following steps described in this paragraph. The order of the steps may vary, may be sequential, may overlap, may be in parallel, and combinations thereof, if not otherwise stated. At least one condition of the vehicle is sensed. A one-way mechanism is activated for a first period of time after the at least one condition is sensed to be exceeding a certain threshold level. Further expansion of the spring member is prevented or restricted or hindered using the one-way mechanism while the one-way mechanism is activated, but the activated one-way mechanism allowing the spring member to be further compressed.

A vehicle control device includes a variable-damping-force shock absorber, a sprung mass vibration damping control, an unsprung mass vibration damping control device, and a damping force control device configured to calculate a damping force control amount on the basis of a sprung-mass vibration damping control amount when the sprung-mass vibration damping amount is greater than an unsprung-mass vibration damping control amount, calculating a damping force control amount on the basis of the unsprung-mass vibration damping amount so as to maintain the damping force distribution factor when the sprung-mass vibration damping amount is equal to or less than the unsprung-mass vibration damping amount, and controlling the damping force of the variable-damping-force shock absorber.

A method and system for adjusting a relative leveled height of a sprung mass of a vehicle to an unsprung mass of the vehicle. The method also includes receiving an input from an operator for incrementally / decrementally changing the height of the sprung mass. A system for performing the method is also disclosed.