335 results about "Downforce" patented technology

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.

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.

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 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.

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 the technical field of scooter rear motor bearing assembly, and discloses a scooter rear motor bearing assembly jig which comprises a press-in device, a positioning plate and a positioning seat, a motor assembly comprises a rear machine shell, a rear machine beam and a connecting beam shaft, a bearing part is formed at the connecting position of the rear machine beam and the connecting beam shaft, and the bearing part is used for assembling a bearing piece; the coupling beam shaft and the positioning seat are vertically embedded, the positioning plate is provided with a positioning groove, the coupling beam shaft is longitudinally arranged and embedded in the positioning groove, the positioning seat and the positioning plate are synchronously used for positioning the coupling beam shaft, and the press-in device is used for applying downward pressure and located above the bearing part. Automatic downward pressing operation is achieved, downward pressing force is stably and evenly applied, and time and labor are saved; moreover, during re-press-in operation, under the matching action of the positioning seat and the positioning plate, the positioning of the rear shell is realized, and the placement stability of the coupling beam shaft is enhanced, so that the alignment of the press-in device and the bearing part is ensured, the press-in accuracy of the bearing part is improved, and the assembly qualification rate of the bearing part is improved.

The application discloses a vehicle model self-adaptive intelligent front wheel air resistance plate system, and belongs to the technical field of automobile aerodynamics optimization. The vehicle model self-adaptive intelligent front wheel air resistance plate system comprises a parameter sensing layer, an intelligent decision layer and an execution control layer. The parameter sensing layer is used for collecting sensing parameters in real time. The intelligent decision layer is used for calculating a minimum wind resistance coefficient, maximizing a downforce and completing adjustment within a response time constraint, and forming a control instruction based on the sensing parameters by using a deep reinforcement learning algorithm under given vehicle model characteristics and working conditions. The execution control layer is used for executing the control instruction. The front wheel air resistance plate is dynamically adjusted under the action of the execution control layer. The disclosed system realizes dynamic adjustment of parameters such as curvature, thickness and chord length by combining multi-dimensional parameter sensing, intelligent decision and execution control three-layer optimization architecture and self-adaptive curved surface material, so that optimal wind resistance and lift control can be realized under various vehicle models and complex working conditions.

A downforce indicator device for indicating a downforce acting on an insertion tool includes a tool receptacle for receiving an insertion tool, a downforce measurement unit for measuring a downforce acting on the tool receptacle, and a downforce indicator unit for indicating the measured downforce. The downforce measuring unit includes a first and a second sleeve, coaxially and displaceably disposed on the first sleeve in the axial direction. The first sleeve is connected to the second sleeve by a limiting element which can be displaced axially on the first sleeve to establish a maximum position of the second sleeve for an axial displacement of the second sleeve directed away from the first sleeve. The first sleeve and the second sleeve form a common receptacle for receiving a spring element acting on the second sleeve in the direction towards the maximum position. The maximum position is associated with a minimum downforce.

The utility model relates to the technical field of elevator maintenance, and discloses a lift car limiting device for elevator maintenance, which comprises a mounting plate, a limiting mechanism is arranged on the mounting plate, the limiting mechanism comprises a fixing frame and a guide rod, and the guide rod is fixedly connected inside the fixing frame. The mounting plate is mounted on the shaft wall of the bottom end of the elevator shaft, when an elevator needs to be overhauled, the lift car is moved to the bottom of the elevator shaft, the lift car falls on the limiting seat, the limiting seat can move downwards under the downward pressure of the lift car, the descending force of the limiting seat can be buffered by the spring, and the lift car is prevented from being overhauled. The problem of collision damage caused by contact between the lift car and the limiting seat is avoided, after the lift car stops stably, the hydraulic oil cylinder is started to push the tooth block to move in the direction of the mounting plate, the tooth block is meshed with the tooth plate, and therefore the position of the limiting seat is fixed, the limiting seat can achieve the purpose of limiting and supporting the lift car, and the service life of the lift car is prolonged. And therefore, the safety during elevator maintenance is improved.

The invention discloses a vehicle empennage control method, device and equipment based on road adhesion coefficient estimation, and the method comprises the steps: obtaining a driving state parameter of a target vehicle in a current time period, and determining adhesion coefficient time sequence data and slip rate time sequence data of the target vehicle; acquiring image information of a road in front of the target vehicle, and extracting a road texture feature matrix and a road color feature matrix; inputting the attachment coefficient time series data, the slip rate time series data, the road texture feature matrix and the road color feature matrix into a pre-trained road attachment coefficient estimation model to obtain a road attachment coefficient estimation value at the next moment; and according to the road adhesion coefficient estimation value, determining a corresponding optimal downforce, and according to the optimal downforce, adjusting and controlling the empennage of the target vehicle. The method improves the accuracy of road adhesion coefficient estimation and the accuracy of vehicle empennage control, thereby improving the safety and stability of vehicle driving, and can be applied to the technical field of vehicle control.

This invention discloses an anti-theft manhole cover for municipal engineering water supply and drainage, belonging to the field of municipal engineering technology. It includes a manhole base, a manhole cover body, a shock-absorbing rubber strip, a locking mechanism, and a concealed anti-theft unlocking component. The inner wall of the manhole base has a V-shaped groove, into which a shock-absorbing rubber strip with an internal buffer air chamber and anti-detachment ribs is embedded, significantly improving shock absorption, noise reduction, and self-cleaning performance through aerodynamic effects. The locking mechanism is located at the bottom of the manhole cover. Its pressure-bearing transmission component, when subjected to vertical vehicle loads, converts downward pressure into horizontal thrust, forcing the locking tongue to engage in the locking hole of the manhole base, preventing the manhole cover from eccentric jumping and circumferential rotation. The anti-theft unlocking component uses a concealed rotating rod with a dustproof camouflage cover to retract the linkage cable, pulling the locking tongue back to achieve manual unlocking. This achieves the linkage of adaptive locking, pneumatic buffering, and mechanical anti-theft, thereby eliminating the "road trap" hazard and extending the component's lifespan.

The utility model relates to the technical field of accessory welding machining, and discloses an automobile accessory welding bearing platform which comprises a supporting frame, a workbench is fixedly connected to the top of the supporting frame, a first limiting groove is formed in the workbench, a fixed base is slidably connected to the upper surface of the workbench, and an adjusting assembly is arranged on the upper surface of the fixed base. The adjusting assembly comprises a connecting handle, a second limiting groove is formed in the outer wall of the connecting handle, a first connecting rod is slidably connected to the outer wall of the second limiting groove, a second connecting piece is fixedly connected to the outer wall of the first connecting rod, and a first connecting piece is rotatably connected to the bottom of the second connecting piece. According to the device, the connecting handle is pressed downwards to drive the second connecting piece to move, the second connecting piece exerts downward pressure on the first connecting piece after being subjected to acting force, meanwhile, the circular fixing plate is disengaged, meanwhile, the position of the fixing base on the first limiting groove is moved to achieve the effect of fast adjusting and fixing, and the equipment utilization rate and the production efficiency are improved.

A vehicle includes a frame configured to pivot relative to a support surface through both positive and negative roll angles and a wheel support coupled to the frame. The wheel support includes an axle mounting portion. An axle defining an axis of rotation is mounted to the wheel support at the axle mounting portion. A downforce generating system is mounted to the wheel support between the frame and the axle mounting portion. The downforce generating system includes a wing support mounted to the wheel support and a downforce generating wing pivotally mounted to the wing support. The downforce generating wing includes an aerodynamic surface having a leading edge. The downforce generating system is configured to maintain a substantially horizontal orientation of the leading edge relative to the support surface as the frame pivots between the positive and the negative roll angles.

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

The present invention is directed to a novel vehicle configuration with at least one tunnel (2) enclosed inside the vehicle body, wherein the tunnel (2) comprises an inlet (9), an outlet (10) and a middle section forming a neck (14) of the tunnel (2), wherein the tunnel (2) is narrower at the neck (14) than at the inlet (9) and outlet (10) to achieve Venturi effect The tunnel (2) is applicable to any vehicle type, with all propulsion systems, and especially to electric sports cars. The vehicle configuration with the at least one enclosed tunnel (2) has the following main advantages: reduced drag coefficient, increased downforce, increased vehicle structural rigidity, and better stability of the vehicle travelling at high speeds.

The invention relates to a wiper structure capable of reducing wind resistance lifting force, and belongs to the technical field of wipers, the wiper structure comprises a wiper and a wiper arm, the wiper arm comprises a wiper rod and a connecting piece on one side of the wiper rod, and the connecting piece is provided with a second windward side and a third windward side. According to analysis and verification, the pressure coefficient of an original windscreen wiper is designed to be 17n / m, after the wind lifting force is reduced through a new structure, the downward pressure of the windscreen wiper can be designed to be about 12N / m, the pressure of the windscreen wiper is greatly reduced, and therefore the purposes of reducing the sound generated when the windscreen wiper is used for brushing glass and reducing the noise generated when the windscreen wiper is used for brushing the glass are achieved. And meanwhile, the downward pressure of the wiper arm is small, the load of the wiper motor is reduced, so that the noise of the wiper motor is reduced, the size and the power of the motor can be reduced by reducing the load of the motor, the power consumption of the wiper can also be reduced, and the effects of energy conservation and emission reduction are achieved.

The application provides a kind of wheel stable steering system, including the first driving part of the steering system of front wing assembly, which comprises a wheel core; a threaded part is arranged at the end of the wheel core away from the wheel rim upright column; the end of the wheel core close to the threaded part is threadedly connected with a locking nut through the wheel; a step part is arranged at the end of the threaded part away from the wheel rim upright column, two plug-in holes are arranged on the step part, which are axially symmetrical to the wheel core, a anti-dislocation device is arranged between the two plug-in holes, and the end of the anti-dislocation device extending outward through the plug-in hole axially limits the locking nut; the stable connection between the wheel and the first driving part is realized; the front wing assembly provides the down pressure for the vehicle wheel to realize the stable steering of the two vehicle wheels; and the front wing assembly can reduce the resistance of the vehicle wheel.

The utility model relates to the field of assembly, and provides a manual press, which comprises a frame, a hand wheel, a screw rod, a connecting piece and a pressure head, the screw rod is screwed on the frame, one end of the screw rod is provided with a square head, the square head is adaptively connected with the hand wheel, the other end of the screw rod is provided with a ball head, the ball head is adaptively connected with the upper end of the connecting piece, and the connecting piece rotates around the central axis of the screw rod. The lower end of the connecting piece is connected with the upper end of the pressure head. Through adaptive connection of the cross beam, the sleeve and the screw rod, the pressing head can move up and down by rotating the hand wheel, the relative distance is adjusted, the operation space is adjusted according to different products, the movement stroke of the screw rod is large, and the assembly requirements of large-size products can be met; the device is easy to operate and firm in fixation, the screw moves downwards, the product is pressed by the pressing head, reliable clamping fixation and downward pressing force are provided in the vertical direction, and the precision assembly quality of spaceflight valve products is guaranteed.