58results about How to "Improve NVH" patented technology

A vehicle drive system for adjusting vehicle fuel economy is described. In one example, the vehicle drive system includes an operator interface for adjusting vehicle operation so as to increase or decrease fuel consumption according to a driver preference.

A window assembly configured for installation in a recessed window aperture comprises one or more transparent fixed position panes, one or more sliding panes, and a mounting frame. The mounting frame comprises at least a substantially full-circumference, molded plastic frame member and reinforcement integral with the frame member. The mounting frame at least partially defines a window opening. The mounting frame, e.g., the frame member, forms upper and lower slider runways extending laterally above and below the window opening. The sliding pane is slidably positioned in the upper and lower slider runways for sliding movement between open and closed positions. The mounting frame mounts the fixed position pane(s) by adhesive surface bonding to the interior surface of the fixed position pane. The exterior surface of the fixed position pane is free of adhesive. At least a laterally outboard portion of the peripheral edge of the fixed pane is covered by a portion of the frame member which also is flush with the adjacent exterior surface of the fixed position pane. A show-surface portion of the full-circumference, molded plastic frame member forms the entire show surface of the window assembly for at least a laterally extending portion the window assembly above and / or below the window opening. The reinforcement comprises an elongate reinforcing member(s) extending laterally above and / or below the window opening.

A vehicle drive system comprising of a variable displacement engine including a plurality of cylinders, where at least one of the plurality of cylinders selectively deactivates to decrease engine displacement; a torque converter operatively coupled to the variable displacement engine configured to operate with variable slip; a driver interface for receiving a preference setting from a driver; a control system for receiving the driver preference setting, and adjusting torque converter slip based on the driver preference setting.

A method of operating an engine having an adjustable balance shaft may comprise adjusting operation of the balance shaft during engine operation in response to an engine combustion mode. For example, balance shafts may be disabled during SI mode and enabled during HCCI mode. Various alternative examples may also be used.

A structure for connecting a wheel house panel with a rear floor of a vehicle, which connects the rear floor forming a rear portion of a bottom of the vehicle with the wheel house panel on which shock absorber mounting brackets attached to both sides of the rear floor and supporting a shock absorber are mounted may include a first member bending between a lower end of an inner side of the wheel house panel and a side of the rear floor, with both ends attached to the wheel house panel and the rear floor, respectively, a second member vertically elongated and attached to an outer side of the wheel house panel and disposed behind the shock absorber mounting brackets, and a third member vertically elongated and attached to the outer side of the wheel house panel and disposed in front of the shock absorber mounting brackets.

The invention provides an engine compartment bracket assembly mounting structure. A chassis left suspension connected with a left longitudinal beam reinforcing assembly and a right suspension connected with a motor mounting bracket are correspondingly arranged at the two ends of an engine compartment bracket front cross beam assembly and an engine compartment cross beam assembly; the chassis leftsuspension and the right suspension can reduce and control the transmission of vibration of an engine compartment bracket and have a supporting effect. Compared with a hard connection mode in the prior art, the engine compartment bracket assembly mounting structure provided by the scheme has the advantages that an effect of realizing soft connection between the whole engine compartment bracket anda whole vehicle body structure can be achieved; requirements on strength and rigidity can be satisfied; requirements on vehicle stability can also be satisfied; the vibration amplitude of a vibrationsource is reduced to avoid the forming of resonance; and therefore, performances, such as NVH and safety grade, of the whole vehicle are obviously improved. The invention further provides a vehicle with the engine compartment bracket assembly mounting structure.

The invention relates to an apparatus (1) and a method for driving a solenoid valve (3), having an evaluation and control unit (10), a PWM apparatus (20) and a current measuring apparatus (AM), wherein, in normal operation, the evaluation and control unit (10) generates a PWM signal (PWM) having a duty ratio (TV) and emits said PWM signal to a magnet assembly (3.1) of the solenoid valve (3) by means of the PWM apparatus (20), wherein the current measuring apparatus (AM) detects a current (I) through the magnet assembly (3.1) resulting from the PWM signal (PWM) and reports said current back to the evaluation and control circuit (10), wherein a current (I) that is above a response threshold of the magnet assembly (3.1) triggers a switching process of the solenoid valve (3), and wherein, in test operation, the evaluation and control circuit (10) generates and emits at least one test PWM signal (TPWM1, TPWM2) having a duty ratio (TV1, TV2) by means of the PWM apparatus (20), said at least one test PWM signal inducing a test current (IT1, IT2) that is below the response threshold through the magnet assembly (3.1), and to a hydraulic assembly having such an apparatus (1) for driving a solenoid valve (3). In this case, in test operation, the evaluation and control unit (10) generates and emits at least two different test PWM signals (TPWM1, TPWM2) and detects the resulting test currents (IT1, IT2), wherein the evaluation and control unit (10) derives presently prevailing ambient conditions from the predefined test PWM signals (TPWM1, TPWM2) and the resulting test currents (IT1, IT2) and, in normal operation, generates and emits a subsequent PWM signal (PWM) based on the presently prevailing ambient conditions, said subsequent PWM signal inducing a current (I) that is above the response threshold, for the purpose of switching the solenoid valve (3).

A dynamic damper assembly may include a plurality of bodies arranged at predetermined intervals on an outer peripheral surface of a drive shaft, and an elastic body formed to surround each of the bodies and fixing each body to the drive shaft.

The invention discloses an engine crankshaft composite shock absorber comprising a wheel hub which is connected with an engine crankshaft, a curve shock absorbing unit is arranged on the inner circumference of the wheel hub, and a torsion shock absorbing unit is arranged on the outer circumference of the wheel hub. Due to the fact that the torsion shock absorbing unit and the curve shock absorbing unit are composited together, curve amplitude and torsion amplitude of the crankshaft of a whole engine are made to be reduced at the same time through combined effects of the curve shock absorbing unit and the torsion shock absorbing unit, and therefore NVH and riding comfort of a whole vehicle are improved.

The embodiments of the invention disclose a navigation oil-saving method and system of a new energy vehicle and the vehicle. The navigation oil-saving method comprises the steps that a driving route of the current vehicle and front road condition information corresponding to the driving route are acquired; the current battery power of the vehicle is acquired; whether the front road condition information and the current battery power meet preset conditions or not is judged; an oil-saving strategy corresponding to the preset conditions is acquired when the front road condition information and the current battery power meet the preset conditions; and an engine of the vehicle is controlled to work according to the oil-saving strategy. By adopting the navigation oil-saving method and system ofthe new energy vehicle and the vehicle, electric quantity is stored in advance in a high-speed area with smooth vehicle driving road conditions according to the navigated front road condition information and the current battery power condition, so that the situations that the engine operation frequency is reduced and the oil consumption is increased in a congested road section with low speeds areavoided, and meanwhile, the NVH of the whole vehicle can be greatly improved in a low-speed working condition.

A method of operating an engine having an adjustable balance shaft may comprise adjusting operation of the balance shaft during engine operation in response to an engine combustion mode. For example, balance shafts may be disabled during SI mode and enabled during HCCI mode. Various alternative examples may also be used.

A control system and a control method of a gasoline direct injection engine may include determining whether the engine is stopped and can improve NVH of a vehicle by keeping the fuel high-pressure pump input valve of the high-pressure pump operating for a predetermined time and preventing fuel from flowing backward to the low-pressure pump.

The invention relates to a pedestrian protection leg type protection integrated structure. The protection integrated structure comprises a lower protection plate, an energy absorption block and an anti-collision beam, the lower protection plate is installed between a front end frame and a front bumper skin, the two ends of the lower protection plate are connected with the anti-collision beam through side supporting supports, the anti-collision beam is connected with a longitudinal beam, and the energy absorption block is fixed to the anti-collision beam. A shank supporting cross beam is integrated on the lower protection plate, and part of collision energy on the lower portion of the shank is transmitted to the side supporting supports through the shank supporting cross beam and then transmitted to a vehicle body through the front anti-collision beam; and part of collision energy is transmitted to the front end frame through the lower protection plate and then transmitted to the longitudinal beam. The lower protection plate is connected with a lower cross beam of the front end frame, and a gap between a front bumper and the bottom of the front end frame is sealed. Light weight is achieved, impact energy on the lower portions of shanks of pedestrians can be effectively absorbed, the number of parts is reduced, cost is reduced, the modality of the whole front end is improved, andimprovement of NVH is facilitated.

A control system and a control method of a gasoline direct injection engine may include determining whether the engine is stopped and can improve NVH of a vehicle by keeping the fuel high-pressure pump input valve of the high-pressure pump operating for a predetermined time and preventing fuel from flowing backward to the low-pressure pump.

A structure for connecting a wheel house panel with a rear floor of a vehicle, which connects the rear floor forming a rear portion of a bottom of the vehicle with the wheel house panel on which shock absorber mounting brackets attached to both sides of the rear floor and supporting a shock absorber are mounted may include a first member bending between a lower end of an inner side of the wheel house panel and a side of the rear floor, with both ends attached to the wheel house panel and the rear floor, respectively, a second member vertically elongated and attached to an outer side of the wheel house panel and disposed behind the shock absorber mounting brackets, and a third member vertically elongated and attached to the outer side of the wheel house panel and disposed in front of the shock absorber mounting brackets.

A window assembly includes fixed panes, a sliding pane, and a vehicle mounting frame. The mounting frame includes a single, unitary, substantially full-circumference frame member and reinforcement at least partly embedded in the frame member. Interior surfaces of the fixed panes are bonded to the frame member, and the exterior surface of the fixed panes are free of the frame. At least a laterally outboard portion of the peripheral edge of each fixed pane is covered by the frame member. A surface of the window assembly for at least a laterally extending portion of the window assembly above or below the window opening.

The invention relates to an intelligent wheel speed sensor structure which comprises a PIN plugin, a wheel speed sensor probe and a wire harness. The PIN plugin comprises a two-PIN plugin body and a four-PIN plug joint, the two-PIN plugin body and the four-PIN plug joint are arranged at two ends of the wire harness respectively, and the wheel speed sensor probe is arranged on the wire harness through a branched structure. By adopting the above scheme, the problems of arrangement and assembly of an electronic clamp wire harness and an intelligent wheel speed sensor can be solved, after-sales claim can be reduced greatly, production efficiency can be improved, purchase cost can be lowered, and production management expense can be reduced. The intelligent wheel speed sensor structure is high in practicability and production efficiency and can lower labor intensity, reduce after-sales complaint, improve product image, lower purchase cost of a whole vehicle and improve NVH and waterproof performance of the whole vehicle.

The invention relates to a bushing structure of a cantilever frame shock absorber. The bushing structure comprises an inner steel sleeve, a rubber sleeve and an outer steel sleeve; the inner steel sleeve is in interference fit with the rubber sleeve; the rubber sleeve is in interference fit with the outer steel sleeve; the head end of the inner steel sleeve is provided with an inserting part and alimiting block, wherein the inserting part is inserted into a mating part hole position; and the limiting block is connected with the inserting part and is fixed together with the rubber sleeve in anintegrated sulfurization manner. According to the bushing structure provided by the invention, the end part of the inner steel sleeve is additionally provided with one limiting block so as to increase the radial load bearing capacity of a bushing so that the bushing can satisfy a bolt torque range of different loaded car types; and the bushing structure is applicable to rear suspension frames ofvarious platform car types, lowers the development cost and shortens the development period.

The invention discloses an internal combustion engine in-cylinder braking device which comprises a rocker arm shaft, an air inlet rocker arm assembly and an exhaust rocker arm assembly. A braking valve assembly is arranged on the exhaust rocker arm assembly, hydraulic tappet assemblies are arranged at the valve ends of the rocker arm assemblies respectively, and the hydraulic tappet assemblies are matched with valve bridge assemblies. Each hydraulic tappet assembly comprises a shell, tappets are elastically matched in the shells, elephant feet are assembled on ball heads of the tappets, main oil ducts are axially arranged on the tappets, first one-way valve assemblies are arranged between the upper ends of the main oil ducts and an upper oil cavity, exhaust holes are formed in the shells, oil inlet holes and oil outlet holes are radially formed in the tappets, and reducing sections are arranged on the oil outlet holes. A lubricating oil channel in the rocker arm shaft communicates with the oil inlet holes through oil inlet channels, the oil outlet holes communicate with the inner cavities of the elephant feet, and a braking control oil channel communicates with the braking valve assembly through a braking oil channel on a rocker arm. The internal combustion engine in-cylinder braking device has the advantages that the structure is reasonable, the braking reliability and safety can be improved, the valve clearance does not need to be adjusted, engine noise can be reduced, and NVH is improved.

The invention relates to a small output volume automobile engine chain timing system. A high strength nylon chain wheel structure is adopted, contact between a chain and a chain wheel is changed into nylon-steel contact from steel-steel structure contact, kneading impact between the tooth-shaped chain and the chain wheel is greatly reduced, the NVH of the timing system is improved, and system motion is more stable and silent. According to the small output volume automobile engine chain timing system, an anti-attrition layer is additionally arranged on a guide rail, the friction coefficient is reduced, sliding friction force between a chain plate on an original chain and the guide rail is reduced, the system friction loss is reduced, and the engine fuel using rate is improved. A filter net used for filtering engine oil is additionally arranged in a tensioning device, impurities are prevented from entering the tensioning device, and major engine quality accidents caused by the timing system are avoided. Meanwhile, the manner that the guide rail is linked and fixed through a pin shaft is adopted, a traditional bolt installing and fixing manner is replaced, transverse abrasion of the guide rail is reduced, and the engine assembly efficiency is improved.

A one-way clutch configured for decoupling an alternator pulley from an alternator hub in a motor vehicle drive system is provided. The one-way clutch includes a ramp plate for non-rotatable connection with an inner circumferential surface of the pulley and rollers in axial engagement with the ramp plate. The rollers are movable along ramped surfaces of the ramp plate between a first position and a second position. The one-way clutch also includes an elastic assembly forcing the ramp plate and rollers into the axial engagement. The elastic assembly axially forces the rollers to transfer torque from the pulley into the hub when the rollers are in the first position. The hub is rotationally decoupled from the pulley when the rollers are in the second position.

The invention relates to an integrated pedestrian protection structure. The structure comprises a bumper skin, an energy absorption block and an anti-collision beam, the bumper skin is installed on anautomobile body, and a shank supporting cross beam is integrated at the lower end of the bumper skin; and the two ends of the shank supporting cross beam are fixedly connected with the anti-collisionbeam on the upper portion through side supporting supports, and the energy absorption block is fixedly arranged on the anti-collision beam. When a pedestrian collides with the front end of the automobile, the upper portions of the shanks of the pedestrian make contact with the middle of the bumper skin, energy is transmitted to the energy absorption block, the energy absorption block deforms to absorb the energy and then transmits impact to the anti-collision beam, the lower portions of the shanks of the pedestrian make contact with the lower portion of the bumper skin, the shank supporting cross beam integrated on the lower portion of the bumper skin absorbs collision energy, and the energy is transmitted to the anti-collision beam through the side supporting supports. Light weight is achieved, and impact energy on the lower portions of shanks of pedestrians can be effectively absorbed.

The invention relates to a phase control loop for the rotational speed regulation of an electric generator fed by an internal combustion engine, having an input connection, which is designed to receive a rotational speed signal measured on a drive shaft of the electric generator, an amplitude determination device, which is coupled to the input connection and which is designed to determine the amplitude of rotational speed ripples of the measured rotational speed signal, a correction function device, which is coupled to the amplitude determination device and the input connection and which is designed to determine a rotational speed correction signal on the basis of the determined amplitude of the rotational speed ripple and of the measure rotational speed signal, a phase discriminator, which is coupled to the amplitude determination device and the correction function device and which is designed to determine a phase difference signal between the measured rotational speed signal and the rotational speed correction signal, wherein the correction function device is designed to regulate the rotational speed correction signal on the basis of the determined phase difference signal to a phase difference of zero, and a summing element, which is designed to subtract the rotational speed correction signal from the measured rotational speed signal and to provide a corrected rotational speed signal to an output connection of the phase control loop.

A dynamic damper assembly may include a plurality of bodies arranged at predetermined intervals on an outer peripheral surface of a drive shaft, and an elastic body formed to surround each of the bodies and fixing each body to the drive shaft.

An electric vehicle reducer gear shaft assembly structure comprises an input shaft assembly, an output shaft and a differential mechanism assembly and is characterized in that a ratchet wheel and an output gear which is meshed with the input shaft assembly are sequentially installed on the output shaft in a press fitting mode; a cone bearing is installed on a shaft shoulder of the output gear in a press fitting mode; an output shaft shoulder which is close to a meshed position of the output shaft and the differential mechanism assembly is provided with a cone bearing; a graded snap spring is arranged on the press fitting external side portion of the output shaft and the output gear. The electric vehicle reducer gear shaft assembly structure is impact and light. According to the electric vehicle reducer gear shaft assembly structure, the length of a gear shaft string is shortened, the axial length, the size and the weight of a reducer is reduced, and the gear accuracy is improved due to a gear structure design; the gear machining and assembling error caused by spline is avoided and accordingly the gear accuracy is improved due to a gear machining and assembling scheme; meanwhile the NVH (Noise Vibration and Harshness) performance, the gear intensity service life and the cone bearing service life are improved.

The invention discloses an engine start-stop control method and system for a power split type hybrid transmission, and belongs to the technical field of power split type hybrid electric vehicles. The method is used for restraining impact caused by the start-stop process of the power split type hybrid power engine. The control system comprises a vehicle control unit HTCU, the engine control unit ECU is responsible for collecting a high-precision crankshaft position signal and a camshaft position signal and sending the signals to the generator controller MCU2 for shutdown angle control; the generator control unit MCU2 is responsible for dragging an engine to start and reversely dragging the engine to a specified crank angle through torque control; and the driving motor control unit MCU1 is responsible for responding to the vehicle control unit HTCU to perform torque preloading when the engine is started. The control system integrates the functions of driving motor torque advanced loading and engine stop angle control, and the impact feeling caused by the engine start and stop process is solved through the special control mode, so that the vehicle NVH is optimized, and the driving comfort and smoothness are improved.

The invention relates to a device used for an engine and acting on a timing belt or chain, in particular to an engine chain timing system. A high-intensity nylon chain wheel structure is adopted, so that original steel-steel contact between a chain and chain wheels is converted into nylon-steel contact; oil-resistant rubber is arranged below the position, between every two adjacent teeth of the chain wheels, of the tooth root circle; in the process that the chain is pinched into the chain wheels, a chain connection board makes contact with the oil-resistant rubber firstly, and then rollers are pinched into the chain wheels, so that the pinching impact between the rollers and the chain wheels is greatly reduced, the NVH of the chain timing system is improved, and the system moves more stably and silently. Idler wheels are additionally arranged on a guide rail, so that sliding fiction between a chain plate on the chain and a guide rail in the prior art is changed into rolling friction between the rollers and the guide rail, the friction loss of the system is reduced, and the fuel utilization ratio of the engine is increased. A sensor used for detecting whether a plunger bounces up completely or not is also additionally arranged in an expansion machine and can remind a driver of replacing the chain timing system in time, and major quality accidents of the engine are avoided.

The invention is applicable to the technical field of engines and vehicles, and discloses a crankshaft damping wheel, a mounting structure thereof, an engine and a vehicle. The crankshaft damping wheel comprises a wheel body located in an engine front cover plate, the wheel body comprises a hub connected with a crankshaft, an inertia ring mounted on the hub in a sleeving manner and a rubber ring mounted between the Inertia ring and the hub, the mounting structure is provided with the crankshaft damping wheel, the engine is provided with the mounting structure, the vehicle is provided with theengine, according to the crankshaft damping wheel, the mounting structure thereof, the engine and the vehicle, the crankshaft damping wheel is mounted in the engine, a crankshaft does not need to penetrate through the engine front cover plate, a penetrating hole and an oil seal do not need to be mounted on the engine front cover plate, the rotating resistance of the crankshaft is small, the friction of the engine is relatively reduced, the whole vehicle oil consumption is reduced, the way of transmitting the engine noise to the outside can be reduced, NVH of the engine can be improved, and theuser driving and taking experience is better.

The invention discloses an electric vehicle cooling system and a control method. The electric vehicle cooling system is composed of a motor cooling system and a battery cooling system, the motor cooling system is composed of a liquid storage tank, a radiator, an electric fan, a water temperature sensor, an electric water pump, a motor, a controller and a DCDC, the liquid storage tank, the radiator, the electric fan, the water temperature sensor, the motor, the controller and the DCDC are connected through a cooling pipeline, and the water temperature sensor is used for collecting temperature signals and transmitting the temperature signals to the controller; and the battery cooling system is composed of an electric water pump, a PTC, a heat exchanger, a CHILLER, an electric water pump, a battery, a water temperature sensor and a liquid storage tank which are connected through a cooling pipeline, and the water temperature sensor collects temperature signals and then transmits the temperature signals to the controller. The electric vehicle cooling system control method is divided into a motor cooling control method and a battery cooling control method. According to the electric vehicle cooling system and the control method, the cooling system can be simplified, and power consumption of parts of the cooling system is reduced; and the control method effectively avoids frequent opening and closing of parts of the cooling system and improves NVH of the system.