36 results about "Fuel economy in automobiles" patented technology

A method of operating a HVAC system in a vehicle having an engine that operates in a high efficiency mode and a less efficient mode is disclosed. The method may comprise the steps of: operating a refrigerant compressor to cool a passenger compartment and charge a cold thermal storage apparatus; determining if a cold charge in the storage apparatus has exceeded a threshold; enabling compressor cycling if the cold charge in the storage apparatus has exceeded the threshold; detecting if the engine is operating in the high efficiency mode; determining an amount of HVAC loads on the engine; determining a proximity of the engine operation to a switching point from the high efficiency mode to the less efficient mode; and conducting a HVAC load shed if the HVAC load reduction allows the engine to stay below the switching point and the compressor cycling is enabled.

The invention belongs to the technical field of hybrid vehicle energy management. An intelligent energy management and control method for a hybrid vehicle comprises the following steps: (1) establishing a torque equation required at a ring gear, combining a vehicle speed condition, a throttle opening degree and an acceleration value in the current state to obtain a logic threshold control method and selecting a working mode for the hybrid vehicle according to an SoC threshold of a power battery of the entire vehicle, a vehicle speed threshold and a torque threshold in the current situation; (2) building a power battery low SoC threshold calculation model in software based on a fuzzy logic control method and establishing a hybrid vehicle energy management and control model based on a logicthreshold; (3) controlling the state output of power components based on the hybrid vehicle energy management and control model and according to torque distribution. The intelligent energy managementand control method for the hybrid vehicle uses the variable logic threshold so that a torque distribution strategy can better reflect the characteristics of vehicle working conditions, thereby realizing driving intentions, improving the economical efficiency of vehicle fuel and prolonging the service life of the power battery.

The invention discloses a driver-in-the-loop vehicle fuel economy control method. The method is characterized in that a vehicle is an intelligent network connection hybrid power vehicle, and the control method is a hierarchal control method in which driver random errors are considered; a superior control method in the hierarchal control method calculates an optimal target vehicle speed based on the driver random errors and state information obtained based on an intelligent network connection environment, wherein the state information comprises surrounding vehicle state information and trafficlight state information; a substratum control method in the hierarchal control method calculates the optimal energy distribution of the hybrid power vehicle based on a self-adaption equivalent fuel consumption minimum principle. According to the control method, a preset vehicle speed which is very approximate to an ideal condition can be obtained, and better fuel economy is obtained.

The invention discloses an anti-drag device capable of adjusting the wheel spoke hole area automatically, and relates to an anti-drag device capable of changing the hole area between spokes automatically according to the automobile speed. The anti-drag device solves the problem that the wind drag coefficient of a wheel and fuel consumption are enlarged when an automobile is driven at high speed due to the fact that air eddy is generated in a wheel cavity or positions nearby with the existence of a hole between the spokes. The anti-drag device is composed of a supporting frame, foliated cover plates and connecting transmission parts arranged between the supporting frame and the foliated cover plates, the supporting frame is fixed on a wheel hub and is located between a brake disc flange and the wheel hub, and the foliated cover plates are capable of rotating around the supporting frame. The anti-drag device does not work when the automobile speed is lower so that heat generated by frequent braking of the automobile can be emitted effectively and cannot influence the automobile. The anti-drag device is capable of decreasing the hole area between the wheel spokes automatically along with the increase of the automobile speed until the wheel hole is close to entirely closed, so that the wind drag coefficient of the automobile wheel is reduced greatly, fuel consumption is reduced, and the automobile fuel economy is improved.

The invention relates to an efficient automobile exhaust thermoelectricity recovery device to achieve the purpose of improving of automobile fuel economy. The device is characterized in that a stainless steel tube is arranged between a catalytic cracker and a silencer of an exhaust tube system. A thermoelectricity recovery unit is added on the stainless steel tube, and heat at the cold end of a circular thermoelectricity chip is conducted to a cold end circular aluminum alloy heat plate to be cooled through an ultra-thin high-temperature graphite washer between the circular thermoelectricity chip and the cold end circular aluminum alloy heat plate. The device is assembled through a plurality of heat exchanger minimum units which are not affected mutually. A system thermoelectricity conversion unit which is controllable in energy transmission, that is, extendable in size and power through heat tube own heat transmission characteristics, is formed by the combination of the heat tube technology and shape improved thermoelectric materials. The device can be integrated with the silencer in limited automobile bottom space to form a multifunctional substitution product.

The invention relates to a working mode decision-making method and a device for a power split hybrid electric vehicle. The method comprises the following steps that (1) obtaining the latest working condition segment of a vehicle and the current state parameter of the vehicle; 2) obtaining a principal component score of the characteristic parameter of the latest working condition segment of the vehicle through a principal component analysis method, further calculating an Euclidean distance from the latest working condition segment to a preset clustering center of various working conditions, anddetermining a current driving working condition category; 3) normalizing the current state parameters of the vehicle by adopting the parameter normalization model of the corresponding category; and 4) loading the normalized parameters into the working mode decision sub-models of the corresponding types to decide a target working mode. Compared with the prior art, the influence of different working conditions is considered, the working mode decision sub-models under various working conditions are obtained through BP neural network training on the basis of the global optimal working mode decision sequence, solved through dynamic planning, under various typical working conditions, and the fuel economy of the automobile is improved.

The present invention provides an evaluation method and device of automotive fuel economy. The method comprises a step of establishing a neural network regression calculation model and obtaining a fuel economy probability sequence according to a vehicle speed data sequence, an instantaneous fuel consumption data sequence, an engine rotation speed data sequence, an acceleration data sequence, the neural network regression calculation model, and a fuzzy probability mapping model, and a step of comparing each fuel economy probability in the fuel economy probability sequence with a preset probability threshold orderly, and evaluating the automotive fuel economy according to a comparison result. Through the method and the device, the automotive fuel non-economic process in an automotive driving process can be effectively identified, the automotive fuel economy is evaluated according to the automotive driving data corresponding to the automotive fuel non-economic process, and an automotive driving experience is improved.

The invention discloses an energy-fed semi-active suspension variable damping system and a control method thereof, which uses the energy-fed semi-active variable damping system instead of the traditional oil-liquid non-variable damper, and the variable damping system comprises an energy-fed actuator composed of an energy-fed motor and a ball screw mechanism, wherein the energy-fed actuator comprises a rectifier bridge, a DC-DC conversion circuit, energy storage equipment and controller constitute the energy recovery and damping control circuit. According to the road excitation condition, the variable damping system takes the output torque of the feed actuator as the control objective and the armature current of the motor as the control object, and realizes the regulation of damping and theenergy feedback at the same time by adjusting the duty cycle of the DC-DC converter circuit switch tube. The invention can realize the feedback of the vibration energy of the vehicle body, improve the fuel economy of the automobile and realize the damping adjustment of the actuator at the same time, has fast response speed and can effectively improve the ride comfort of the automobile.

A method and system is disclosed for enhancing fuel economy of a hybrid electric vehicle (HEV) with a high-voltage storage battery and a heat transfer device. Whether a user has elected to enhance the fuel economy of the HEV is determined. When the user has elected to enhance the fuel economy, a command signal is generated increasing operation of the heat transfer device to reduce a temperature of the high-voltage storage battery.

The invention relates to an automobile plastic spare tire. The weight of the existing automobile spare tire is heavy and no good is done to automobile fuel economy; and besides, since most automobile spare tires are made of rubber, steel or aluminum, the structure is complex, the rubber cannot be easily reused and the requirement on environmental friendliness is not satisfied. Accordingly, the automobile plastic spare tire comprises a plastic wheel hub. Spare tire installation holes are arranged in the plastic wheel hub. A circle of plastic elastomer is arranged on the periphery of the plastic wheel hub. The plastic wheel hub and the plastic elastomer are in an integral body. A circle of U-shaped groove is arranged on the periphery of the plastic wheel hub. The plastic elastomer is fixedly arranged on the U-shaped groove. The two vertical sides of the U-shaped groove are transitioned through external round corners. The automobile plastic spare tire provided by the invention has a simple structure and is scientifically designed, and has the advantages that the spare tire is not required to be inflated, the cost is low and the like; moreover, the weight is reduced and the automobile fuel economy is improved; and compared with common rubber spare tires, the automobile plastic spare tire provided by the invention has the advantages that since plastic materials are used, the reuse can be realized and the spare tire is environment-friendly.

The invention belongs to the field of automobiles, and in particular relates to an electric wheel driven multiaxial automobile. The electric wheel driven multiaxial automobile is characterized by an electric wheel driven steering boost system. In the steering boost system, turning wheels of the automobile are changed into independently driving electric wheels, left and right wheels are separately controlled to rotate around a main pin actively according to signals of a steering wheel, and an additional steering boost system is not required to drive the wheels to rotate around the main pin, so that a steering system is simplified. According to the requirement of fuel economy of the automobile, steering boost can be generated only when the steering is required, so that additional energy consumption of the automobile can be reduced, and the fuel economy of the automobile is improved; meanwhile, the driving torque of each electric wheel is separately controlled, and the running stability of the automobile is improved.

The invention relates to a tester for testing the fuel economical efficiency of a light-weight automobile. Aiming at the problem that an automobile can be only tested on a simulation chassis rotary drum dynamometer because the existing fuel measurer can only measure transient fuel consumption or kilometer fuel consumption, so that the economical efficiency of an actual automobile cannot be testedon a road according to a rule, the invention provides a tester for testing the fuel economical efficiency of the light-weight automobile. The tester mainly comprises a fuel consumption meter, a singlechip, an interface chip, a control panel, a display, an automobile speed sensor, a main flow sensor, an auxiliary flow sensor, forwarding gear sensors, an analog/digital (A/D) converter, a circuit and the like. Fuel consumption can be tested according to a road spectrum diagram of a circulation working condition prestored into the singlechip or a requirement of a constant-speed working condition,so that a real road condition and an actual automobile condition can be reflected, and the current transient fuel consumption, the kilometer fuel consumption and the total stored fuel consumption canbe displayed and output; data cannot be lost in a state of power failure, and the data can be put off and accumulated in a state of power on; and the tester is convenient to mount, safe and reliable,and on-automobile test is convenient.

The invention discloses a series-parallel hybrid power system energy management method based on a DQN variant and belongs to the technical field of series-parallel hybrid electric vehicles, thereby improving the training convergence speed and the vehicle fuel economy. The method comprises the steps that a series-parallel hybrid electric vehicle model is established, and environmental parameters, including road gradient and vehicle-mounted quality, influencing an energy management strategy are obtained; an optimal energy management strategy is calculated by utilizing a dynamic programming (DP)algorithm, experience is stored into an optimal experience pool (OEB), a model is trained by combining a hybrid experience playback (HER) technology and adopting a Deuling DQN strategy to obtain a trained deep reinforcement learning agent, and energy management is carried out on the series-parallel hybrid electric vehicle under different working conditions. The HER technology and the DQN variant Dueling architecture constructed by the method can effectively improve the training convergence rate, the automobile fuel economy and the algorithm robustness.

The invention aims to provide a hypoid gear transmission mechanism. On the premise of ensuring enough supporting rigidity and durability, the amount of the lubricating oil and the loss of the transmission friction are reduced; and the hypoid gear transmission mechanism is compact in structure and can meet the requirements on high transmission efficiency and low weight. The hypoid gear transmission mechanism comprises a driving shaft and a driven shaft which are arranged inside a housing and perpendicularly intersected with each other; the driving shaft and the driven shaft are connected through a hypoid gear pair; the hypoid gear transmission mechanism is characterized by further comprising a double-row angular-contact ball bearing which is axially limited in the shaft body of the driving shaft; the outer ring of the double-row angular-contact ball bearing presses against the inner wall of the housing and the inner ring of the double-row angular-contact ball bearing is sleeved onto the shaft body of the driving shaft; and the double-row angular-contact ball bearing is provided with an oil passage for communicating the interior of the double-row angular-contact ball bearing and the interior of the housing. The transmission mechanism is applied to a transmission system structure of an automobile, particularly an all-wheel-drive automobile, can effectively enhance the economy of the automobile fuel oil, and can bring great economic benefit.

The invention discloses a hybrid power system energy management method based on an A3C algorithm, belongs to the field of hybrid power automobile energy management, and aims to solve the correlation problem of Actor and Critic and the correlation problem of experience playback pool samples through an asynchronous dominant action evaluation method on the premise of ensuring the dynamic property ofan automobile. Rapid convergence of the neural network can be realized on the basis of ensuring the fuel economy of the automobile. The method mainly comprises the following steps: establishing an A3Cagent model; setting the state, action and return of the A3C agent model to obtain a set A3C agent model; obtaining a related training data set, and training the A3C agent model according to the obtained related training data set to obtain a trained A3C agent model; and using the trained A3C agent model to perform energy management of the parallel hybrid vehicle.

The invention relates to a hybrid electric vehicle energy management method based on multi-objective optimization, and the method comprises the steps: an off-line optimization stage: constructing a multi-objective optimization function, and carrying out the off-line optimization, the multi-objective optimization function considers a power source working state point transfer cost, a power source efficiency cost, an engine start-stop cost, a battery state transfer cost and a gear shifting cost; and in the online real-time control stage, the whole vehicle torque requirement is determined according to the random working condition vehicle speed requirement, the optimized multi-target optimization function is used for torque distribution of all power sources and vehicle gear setting, and vehicle operation is controlled. Compared with the prior art, the method has the advantages that the multi-objective optimization problem of the fuel economy, the engine start-stop frequency and the gear shifting frequency of the automobile is considered, and the requirements of the fuel economy and the smoothness of the automobile are considered.

The invention relates to a steel-aluminum mixed type front auxiliary frame structure, which belongs to the technical field of automobile chassis auxiliary frames, and comprises a left aluminum alloy support, a right aluminum alloy support, a left aluminum pipe beam, a right aluminum pipe beam and a right aluminum alloy support, the two ends of the left aluminum pipe beam are respectively welded with the left front aluminum alloy support and the left rear aluminum alloy support into a whole; the right aluminum alloy support comprises a right front aluminum alloy support, a right aluminum pipe beam and a right rear aluminum alloy support which are sequentially connected from front to back, and the two ends of the right aluminum pipe beam are welded to the right front aluminum alloy support and the right rear aluminum alloy support into a whole respectively; the middle connecting support comprises a front aluminum alloy cross beam and a steel welding support which are fixedly connected between the left aluminum alloy support and the right aluminum alloy support, and the steel welding support is located behind the front aluminum alloy cross beam. The steel-aluminum mixed structure is adopted, the structure is simple, the weight is light, the rusting risk is avoided, the quality of the automobile chassis is improved, and the fuel economy and the endurance mileage of an automobile are improved.

The invention relates to an automobile hybrid power assembly and a driving method thereof. The automobile hybrid power assembly comprises an internal combustion engine power system and a motor power system. The internal combustion engine power system comprises an engine, an engine driving device and an automobile circuit. The motor power system comprises a motor, a circuit distributor, an electronic control device and a battery pack. The engine driving device drives front wheels and/or rear wheels. The motor and the circuit distributor drive middle wheels. The middle wheels are located at the position, close to the gravity center, between the front wheels and the rear wheels. When an automobile is driven on a driving surface, the middle wheels make contact with the driving surface. The driving method includes the steps that the electronic control device controls the motor to rotate forwards and backwards so that the automobile can correspondingly advance and retreat, the electronic control device is linked with the automobile circuit, the automobile circuit recognizes the accelerator, steering and gear information of the automobile, the motor is controlled to rotate after the information is recognized by the electronic control device, and then the middle wheels are driven to drive the automobile. The scheme is simple, the control mode is flexible, the automobile fuel economy is effectively improved, and energy conservation and environment protection are achieved.