426 results about "Downforce" patented technology

A diffuser element for the underside of a vehicle comprises in longitudinal vertical section, in sequence from front to rear, a first smoothly and monotonically rising panel, and a second panel, and a gap between the first and second panels, wherein the edge of the second panel adjacent the gap comprises a substantially flat planar section which is offset from and below the plane of the first panel ahead of the gap. This type of gap in the diffuser serves to bleed off the boundary layer from the airflow passing through the diffuser, thus enhancing its effectiveness and improving the downforce that is generated as a result. The gap is preferably located in the front half of the diffuser and can form the entrance to a duct leading to an exit on the rear of the vehicle.

Tire traction is dynamically increased in a vehicle by performing a sequence of steps. The vehicle includes a controllable suspension having a damper, a spring, and an active element, a suspension controller, and a controllable aerodynamic element. The body of the vehicle is positioned at a level which allows for a predetermined amount of upward suspension travel. The suspension controller receives a trigger after the body of the vehicle is positioned at a level which allows for a predetermined amount of upward suspension travel. The suspension controller generates a first control signal upon receipt of the trigger. The first control signal is sent to the active element to generate the positive impulse. The positive impulse causes application of force to the wheel of the vehicle in a downward direction, thereby dynamically increasing tire traction. Oscillation of the body of the vehicle is inhibited using the damper as the body of the vehicle oscillates as a result of the spring, thereby inhibiting oscillation of tire traction. The rise of the body of the vehicle is limited by modulating the variable downforce on the body of the vehicle generated by the controllable aerodynamic element.

The invention discloses an impact resistance testing device and method for carton production, and relates to the technical field of impact testing devices.The impact resistance testing device comprises a baffle, four supporting frames and sliding rods are arranged at the upper end of the baffle, a top cover is arranged at the upper ends of the four supporting frames, and a transmission chain is arranged between the top cover and the baffle; a carton is arranged in the middle of the upper end of the baffle, a pressure applying mechanism for carrying out impact test on the carton is arranged among the four transmission chains, and an impact mechanism for changing the impact area to carry out impact resistance test on the carton is arranged in the pressure applying mechanism. According to the invention, a plurality of impact testing methods are provided through cooperation of the pressure applying mechanism and the impact mechanism to simulate various pressures and impacts possibly encountered in the actual transportation and storage process of the carton, so that the pressure resistance and the impact resistance of the carton can be evaluated more accurately; and the transmission chain controls the pressing force of the pressing mechanism, so that the bearing capacity of the carton can be quantified, and the deformation degree and the limit value of the carton under different pressures are determined.

The invention discloses a tension-adjustable power cable mounting and erecting new energy tensioner, which is used for executing two actions of take-up and pay-off on the basis of two large winding wheels aiming at the erecting process of a power cable, and is provided with a stress guide wheel and a differential gear which are associated with each other aiming at the middle position of the two large winding wheels. The device is essentially based on the hooping force generated when the power cable is wound on a large winding wheel, the downward pressure generated by the power cable on a stress guide wheel is combined, the stress change is converted into hydraulic change, and the key point is that the stress guide wheel generates a linear movement process in the vertical direction in the winding process of the power cable, so that the power cable is wound on the large winding wheel. According to the power cable erecting device, a driving gear is actively controlled and limited through hydraulic pressure changes, and the purpose is that in the power cable erecting process, the workload for a power piece is reduced through the conversion process of stress and hydraulic pressure in three positions.

An example manure application unit can include: a main arm pivotally mounted to a toolbar mount tube; a coulter blade operatively connected to the main arm; a closure arm pivotally mounted to the main arm; a closure blade mounted to the closure arm; a main arm downforce assembly, operatively connected between the toolbar mount tube and the main arm, to provide an adjustable downforce force to maintain the coulter blade engaged with ground; and a closure arm torsion spring, operatively connected to the closure arm, to provide varying downforce forces on the closure blade to maintain the closure blade engaged with the ground during operation.

The invention relates to the technical field of tire detection, and discloses an automobile tire service life prediction method and system, the system comprises a support device, a sliding assembly, a sensor assembly and a control module; the acquisition unit acquires parameter information of the tested tire to determine a downward pressure when the tested tire is in contact with the sliding assembly, controls the driving motor to rotate to acquire vibration data of the tested tire within a preset time, and acquires temperature data of the tested tire based on the infrared thermometer; the processing unit performs normal distribution processing on the vibration data to determine vibration representative data; establishing a temperature distribution diagram according to the temperature data; determining a first life prediction value of the tested tire according to the tread wear; the judgment unit determines a wear evaluation value; and the adjusting unit adjusts the first service life prediction value to obtain a final tire service life prediction value. According to the method, the vibration and temperature anomaly evaluation values are combined with the tread wear data, so that the tire life is dynamically adjusted and predicted, and the prediction precision of the tire life is improved.

The invention relates to the technical field of transportation, in particular to loading and unloading equipment for transportation engineering, and solves the problems that when the loading and unloading equipment for the transportation engineering such as train double-wing loading and unloading machines is used, the end corners of a belt conveyor receive downward pressure, and the downward pressure can influence the service life of a hydraulic air cylinder, so that the service life of the hydraulic air cylinder is influenced. And the outer surface of the belt conveyor is inevitably stained with dust and impurities in the conveying process, and if the dust and the impurities are not cleaned in time, the service life of a belt on the belt conveyor is influenced. Comprising a train double-wing loading and unloading machine movable base. A supporting point can be manufactured on one side of the lower end face of the belt conveyor through the hydraulic cylinder anti-fatigue supporting mechanism, a belt located on the belt conveyor can be automatically cleaned firstly through the self-cleaning maintenance mechanism, and a protective layer is automatically sprayed on the outer surface of the belt; by means of the technical scheme, the service life of the hydraulic air cylinder and the belt conveyor is prolonged.

A downforce control system of a host vehicle includes: at least one module configured to generate a first bias lower bound and a first bias upper bound; a parameter module configured to determine a current understeering angle of the host vehicle; an adaptive bias bounding module configured to generate an understeer and oversteer multiplier based on the current understeering angle; a fusion module configured, based on the first bias lower bound, the first bias upper bound, and the understeer and oversteer multiplier, to generate a second bias lower bound and a second bias upper bound; and a downforce tracking module configured, based on the second bias lower bound and the second bias upper bound, to adjust position of one or more downforce devices of the host vehicle.

The invention discloses an automatic assembling mechanism for railway track fastener nuts, and belongs to the technical field of automatic assembling equipment. The mechanism comprises a mechanical arm, a nut assembling mechanism, a power transmission device, a propelling device, a connecting seat and a visual device, the nut assembling mechanism is composed of a compliant device and a magnetic attraction device, the tail end of a mechanical arm is fixed through a connecting base, a visual device recognizes the position of a fastener in real time and guides the mechanical arm to be positioned, a servo motor transmits torque through a speed reducer and a telescopic universal connecting assembly, nut screwing is achieved, and the compliant device absorbs assembling errors and adapts to the posture. The magnetic attraction device is used for adsorbing and fixing the nut; the six-dimensional force sensor is used for monitoring and feeding back torque in real time; the control system is used for adjusting pre-tightening force; the propelling device is used for applying axial thrust; the device can realize automatic identification, positioning, tightening and pre-tightening control of the nut, and is suitable for various sleeper structures and complex track working conditions.

A method for drift detection and control for a vehicle may include determining an intentional drift probability of the vehicle based at least in part on one or more occupant inputs. The method further may include determining an initial aero bias upper bound using a first control system. The method further may include determining an initial aero bias command using a second control system. The method further may include determining a final aero bias upper bound based at least in part on the intentional drift probability, the initial aero bias upper bound, and the initial aero bias command. The method further may include controlling one or more aerodynamic actuators of the vehicle based at least in part on the final aero bias upper bound and the initial aero bias command.

A downforce system for a vehicle includes: a restrictor configured to restrict a flow of air into a region that is defined at least in part by the restrictor and a ground surface, a rim disposed on the restrictor and configured to form at least a partial seal with the ground surface; a dedicated pressure source disposed outside the restrictor and connected to the restrictor via an air flow path, the pressure source being configured to generate a pressure differential across the restrictor; and a dust and debris removal system configured to prevent dust and debris from exiting the downforce system via the air flow path. By generating a pressure differential across the restrictor, a downforce which acts on the vehicle may be generated. The downforce may result in an improved grip or traction of the vehicle, which may improve handling and safety of the vehicle.

The present disclosure relates to a vehicle ramp, comprising a ramp body formed by an acute-angle front ramp portion and a rear ramp portion. The core innovation lies in the pivotally connected rotatable anti-slip washer at the lip edge of the front ramp portion: when deployed, it forms a ground transition extension zone, where a reverse static friction force is generated between the washer and the ground utilizing the downforce of the tire, which effectively prevents rearward sliding displacement of the ramp. The washer achieves deployment and locking through the nesting of the protrusion and hollowed-out area, and when retracted, it is secured by a latching block within the groove to maintain the cleanliness of the friction surface.

The invention relates to a constant-force grinding device and method based on gravity-elastic force dynamic balance, solves the problem of contact force fluctuation caused by blade profile deviation, actuating mechanism positioning error and grinding tool abrasion, and ensures that normal pressure is stabilized at a set threshold value in the polishing process. The device comprises a constant-force coil spring, a motor, a base, a limiting block, a linear guide rail, a balancing weight, a grinding wheel and a foundation frame. The linear guide rail in the vertical direction is installed on the foundation frame, the base is connected to the linear guide rail in a sliding mode and can move up and down on the linear guide rail, the motor is fixed to the base, the upper end of the constant-force coil spring is fixedly connected to the top of the foundation frame, and the lower end of the constant-force coil spring is connected with the base. The balancing weight is installed on the motor or the base, and the balancing weight requirement is calculated according to the target downward pressure F. The contact force stability is improved; the maintenance period is prolonged, and the constant-force floating structure does not need electrical maintenance.

A method for active downforce control for a vehicle may include determining an out-of-phase interaction index between a driver of the vehicle and a controller. The controller is configured to control one or more aerodynamic actuators. The method further may include determining one or more active downforce control inputs based at least in part on the out-of-phase interaction index. The method further may include controlling the one or more aerodynamic actuators based at least in part on the one or more active downforce control inputs.

The invention relates to a hydrogen-diesel oil dual-fuel single-cylinder engine heavy-load working condition combustion control system and method, belongs to the technical field of engines, and is characterized in that an air inlet pressure sensor is mounted near an air inlet valve, a control valve is mounted in an air inlet channel, an electric supercharger and an intercooler are connected to the other air inlet channel in series, and a temperature sensor is mounted; a pressure sensor, a hydrogen sprayer and an oil sprayer are installed in the combustion chamber, and the hydrogen sprayer, the oil sprayer, the electric supercharger, the control valve, the air inlet pressure sensor, the pressure sensor, the intercooler and the temperature sensor are connected with a vehicle-mounted computer at the same time. The control over the pressure rising rate and the pressure fluctuation of the hydrogen-diesel oil dual-fuel single-cylinder engine under the large-load working condition is achieved by adjusting the air inlet supercharging pressure and the fuel injection control strategy, and the problem of abnormal combustion under the large-load working condition is solved.

A vehicle aerodynamic system with dual operating modes to modify downforce across varying speed ranges and driving conditions. The system comprises multiple fans positioned in airflow pathways and deployable skirts that interact with the ground surface. In a first mode, a complete set of skirts creates a fully sealed bounded region under the vehicle with central fans generating maximum downforce at low speeds on smooth surfaces. In a second mode, a subset of skirts (primarily side skirts) modifies the bounded region while all fans operate to provide downforce in dynamic driving conditions with uneven surfaces. The system includes a control mechanism to selectively deploy skirts and operate fans based on driving conditions, optimizing between maximum downforce at low speeds and improved performance over varying terrain at higher speeds.

To provide an automobile capable of obtaining a front downforce without compromising its design.SOLUTION: A portion of a front fender is configured to be variable between a normally mounted state and a raised state to form a wing in front of a side mirror.SELECTED DRAWING: Figure 2

The invention relates to the technical field of automobile transmission, in particular to a forming device for machining an automobile gearbox shell, and solves the problem that the smoothness of the surface of a guide shaft is affected due to the fact that the surface of the guide shaft is easily contaminated with dust in the prior art. The dust particles can cause the contact surface of the push plate and the guide shaft to be abraded, so that the push plate is not smooth enough to move and even shakes, and the die-casting precision of the gearbox shell is influenced. A forming device for machining an automobile gearbox shell comprises a loading frame, a control module and a die-casting module. The die-casting module comprises a top plate, a bottom plate and a push plate; the top plate and the bottom plate are connected through four guide shafts. By means of the adjustable pressure dividing assembly, uniform distribution of downward pressure on the push plate is achieved. The adjustable pressure dividing assembly can adjust concentration and sharing of downward pressure according to needs, it is ensured that the pressure of all areas in the die casting process is kept consistent, and therefore the precision and the overall quality of die castings are improved.

The utility model relates to the technical field of asphalt road flattening devices, and discloses an asphalt road flattening device which comprises a flattening frame provided with two load-bearing rollers, an adaptive frame is arranged on the side edge of the flattening frame, a sliding bearing seat is arranged in the adaptive frame in a sliding mode, and the load-bearing rollers are arranged on the sliding bearing seat. The two ends of the load bearing roller are rotationally arranged in the sliding bearing seats, springs are arranged at the upper ends and the lower ends of the sliding bearing seats, and handrails used for pushing the flattening frame to move are fixedly arranged on the flattening frame. The asphalt pavement compacting device is simple in structure, has two compacting surfaces acting on an asphalt pavement, can increase the weight of the load-bearing roller by adding water to play a role in rapid compacting during working, and in addition, an additional downward pressure is effectively increased under the action of the linear vibrator, so that the compacting effect is better, and the asphalt pavement compacting device is suitable for popularization and application. Water can be drained after the water filling nozzle cover is taken down, the weight of the load-bearing roller is reduced, and transportation and movement are facilitated.

The invention relates to the technical field of AGV transport vehicles, in particular to an AGV steering wheel with independent suspension and a shock absorption method. The rotary part of the AGV steering wheel with the independent suspension is provided with a supporting table, the supporting table is provided with a mounting part used for being connected with a frame, and the mounting part is constructed to be connected with the frame through a rotating shaft; the pair of power wheel sets are symmetrically arranged along the axis of the rotating shaft, the power wheel sets are located on the two sides of the bearing table respectively, and the supporting end and the buffering end of the wheel frame are located on the two sides of the walking motor respectively; a connecting shaft is arranged between the pair of power wheel sets, the end of the connecting shaft is connected with the supporting end of the wheel frame, and a stand column used for being connected with the supporting table is arranged on the side wall of the connecting shaft. The damping structure is arranged between the wheel carrier and the supporting table and used for applying downward pressure to the wheel carrier, and a pair of damping units of the damping structure are symmetrically arranged along the axis of the rotating shaft. According to the AGV steering wheel with the independent suspension, the steering stability is guaranteed, and particularly, the steering function of the steering wheel is guaranteed when a vehicle frame is in a no-load state.

The invention relates to the field of automobile empennages, in particular to an automotive empennage assembly and a vehicle with the automotive empennage assembly.The automotive empennage assembly comprises a mounting base, and an empennage structure is arranged on the mounting base; the empennage structure comprises a middle wing arranged on the mounting base and two side wings symmetrically distributed at the two ends of the middle wing respectively; the side wings are connected with driving structures used for controlling the side wings to move, and the driving structures comprise swing mechanisms connected to the side wings and driving mechanisms used for controlling the swing mechanisms to move. According to the empennage assembly disclosed by the invention, through the design of the two arc-shaped grooves with different lengths, the side wings can be turned over and then rotated, so that the windward area of the empennage is increased, and enough downward pressure is provided for a whole vehicle; and the stability of the automobile during high-speed driving is enhanced.

The invention provides a single-side unfolding method and device for a three-section type empennage, electronic equipment and a vehicle, and can determine the current vehicle speed after a vehicle steering signal is detected. A target single-side wing plate needing to be unfolded is determined in the three-section type empennage according to the vehicle steering signal; an empennage controller is controlled to unfold a target single-side wing plate according to the requested empennage unfolding amplitude, and after the target single-side wing plate needing to be unfolded is determined, the requested empennage unfolding amplitude is determined according to the current vehicle speed when the current vehicle speed is larger than or equal to a preset vehicle speed threshold value; the empennage unfolding amplitudes of different unfolding requests are determined according to different vehicle speeds, use under various vehicle speed scenes is met, intelligent unfolding of the three-section type empennage is achieved, and adaptability is improved. By unfolding the target single-side wing plate, the downward pressure of wheels on the outer side during turning of the vehicle can be increased, the vehicle is prevented from sideslipping due to too high turning speed, and turning safety is guaranteed.

A multifunctional fatigue test device disclosed by the present invention comprises a test bench, a detection device, a pressurization device and a translation device, the detection device is used for supporting a product to be tested, the pressurization device is arranged above the detection device and is used for applying a downward pressure to the product to be tested, and the translation device is arranged at one side of the detection device. The translation device is used for clamping a to-be-detected product and driving the to-be-detected product to translate on the detection device; the detection device comprises a detection box, a sliding block, a supporting plate, two first pressure sensors and two first pressurization springs, the sliding block is arranged in the detection box in a sliding mode, the supporting plate is connected with the sliding block and used for supporting a to-be-detected product, and the two first pressure sensors are arranged on the two opposite sides of the detection box in the driving direction of the translation device correspondingly; the two first pressurizing springs abut against the two first pressure sensors in a one-to-one correspondence mode and are arranged on the two opposite sides of the sliding block respectively. The multifunctional fatigue test equipment provided by the invention not only can realize the fatigue life test of a product, but also can test the friction coefficient of the product.

The invention relates to the technical field of digital twinning, and particularly discloses a cab wind resistance contour optimization method based on digital twinning, which comprises the following steps: S1, establishing a three-dimensional model of a cab, and calculating front wind resistance according to an included angle between planes; s2, marking a standard plane in the initial model, obtaining the air velocity of the standard plane, calculating the air pressure of the standard plane, and calculating the rising force based on the air pressure; s3, marking an influence surface in the initial model, obtaining the air velocity of the influence surface, calculating the air pressure of the influence surface, and calculating the downforce based on the air pressure; and S4, calculating the friction force and the wind resistance coefficient of the initial model, and selecting an optimal model based on the wind resistance coefficient. According to the method, the effect of the optimized cab wind resistance contour is judged through a more reasonable method, so that the cab wind resistance contour with the best effect is selected, the air resistance during vehicle running is reduced, the load and fuel consumption of an engine are reduced, and the running cost is saved.

An active downforce control method for a vehicle may include determining an index of phase-shifted interactions between a driver of the vehicle and a controller. The controller is configured to control one or more aerodynamic actuators. Furthermore, the method may include determining one or more inputs to the active downforce control, at least partially, based on the index of phase-shifted interactions. The method may also include controlling one or more aerodynamic actuators, at least partially, based on the one or more inputs to the active downforce control.

A trencher for cutting a trench into a trenching surface. The trencher includes a rotatable cutting wheel and a motor for rotating the cutting wheel. The trencher includes a shroud assembly. The rotatable cutting wheel is at least partially disposed within the shroud assembly. A lift frame raises and lowers the cutting wheel and shroud assembly. A lift frame actuator moves the lift frame from a transport position to a lowered, trenching position. A skid is connected to the lift frame for contacting the trenching surface during trenching operations. The skid is forward of the shroud assembly. The shroud assembly is moveable relative to the skid. A downforce device enables the skid to apply a downforce to the trenching surface during trenching operations. The downforce device is separate from the lift frame actuator.

This utility model belongs to the technical field of new energy vehicle horn frame technology, and particularly relates to a dual-station dimension inspection device for new energy vehicle horn frames. It includes a body, with four evenly distributed sliding grooves on one side of the upper wall and three evenly distributed sliding grooves on the other side. Movable blocks slide within the sliding grooves, and detachable detection columns are mounted on the top surface of the movable blocks. A gantry frame is fixedly mounted on the top surface of the body, with two guide rods sliding within the upper arm of the gantry frame. A pressure plate is fixedly mounted at the lower end of the guide rods, and two uprights are fixedly mounted on the top surface of the gantry frame. A scale is provided on the front of each upright. This utility model allows for the inspection of mounting holes for horn frames of different specifications by adjusting the position of the detection columns. A spring applies downward pressure to the pressure plate, causing the bottom surface of the pressure plate to press firmly against the top surface of the horn frame. The pointer on the scale indicates the thickness of the horn frame.

This invention relates to the field of automotive braking, specifically providing a lightweight brake pump system for light trucks. The system includes a brake pump housing. A retaining ring is installed on one side of the housing, acting on a push rod inside a connector and an external telescopic cylinder. The telescopic cylinder can be deformed under pressure and then spring back to its original position. A foot brake assembly is connected to one end of the telescopic cylinder. By pressing the pedal of the foot brake assembly, the assembly rotates and generates downward pressure. This downward pressure causes the push rod to slide. As the push rod slides, it causes a piston push plate to move along the inner side of the brake pump housing. The piston push plate's movement generates thrust, which squeezes the brake fluid and converts the pressure into braking force, which is then transmitted to the other brake calipers. Because the piston push plate has a large contact area with the brake fluid, the brake fluid responds quickly to the thrust, resulting in greater braking force and better performance for the brake calipers.

The invention relates to a friction clutch (1) comprising a housing (2), a counter pressure plate (6) fixed to the housing, a pressure plate (4) movable to a limited extent in an axial direction (A) of the friction clutch (1), a plurality of actuation devices (5), a spring mechanism (15) and a clutch disc (3), the clutch disc (3) is frictionally clamped between the counter-pressure plate (6) and the pressure plate (4) by the force generated by the spring mechanism (15), the pressure plate (4) being separated from the clutch disc (3) by means of the actuating device (5) against the force generated by the spring mechanism (15) in the disengaged state of the friction clutch (1), and the pressure plate (4) being separated from the clutch disc (3) by means of the actuating device (5) against the force generated by the spring mechanism (15) in the disengaged state of the friction clutch (1). Each of the actuating devices (5) has a respective actuating lever (9) and an intermediate lever (10), the outer end (11) of the actuating lever (9) in the radial direction (R) of the friction clutch (1) being rotatably fixed to the housing (2) via an actuating bearing (16), the intermediate lever (10) having a first end (13) located radially (R) outside and a second end (14) located radially (R) inside, the first end (13) being rotatably fixed to the housing (2) via an actuating bearing (16), and the second end (14) being rotatably fixed to the housing (2) via an actuating bearing (16). An intermediate lever (10) acts on the pressure plate (4) at a first end (13) and engages on the counter pressure plate (6) at a second end (14), the intermediate lever (10) being rotatably fixed to the actuating lever (9) via an intermediate bearing (17), and the intermediate lever (10) being rotatably fixed to the counter pressure plate (6) via an intermediate bearing (17). A first rod section (18) of the intermediate rod (10), which extends in the radial direction (R) between the intermediate bearing (17) and the first end (13), is further away from the pressure plate (4) in the axial direction (A) than the actuating bearing (16).

The utility model relates to a line nose crimping technology field especially a simple low voltage cable line nose crimping device, the utility model has the advantages of: through the crimping interface on two crimping joints left and right compression line nose and the two sides of the thread end, through holding the operation handle and depressing the pressing handle, thereby through the link rod conduction pressure, the depression force is conducted as horizontal thrust to the sliding seat, make a crimping head push to the other crimping head, realize two crimping joints left and right compression line nose, realize left and right crimping, through the effort lever structure that the pressing handle and the link rod constitute, can amplify pressure, need not hydraulic power equipment, and response is quick, and the crimping speed block, convenient to carry, be suitable for ordinary operation such as overhauling, through the rotation adjusting screw rod, can drive the horizontal sliding position of positioning stopper, realize the adjustment of the blocking position of sliding positioning plate, can more have the practical need control the compressible sliding distance of sliding seat sliding compression, realize the pressure control of line nose.