159 results about "Driving cycle" patented technology

An automotive diagnostic method aimed at focusing diagnostic data retrieval and analysis on a possible fault condition includes receiving vehicle data from a vehicle at a data acquisition and transfer device (DAT) and analyzing the vehicle data to identify a possible fault condition. A drive cycle associated with the identified possible fault condition is identified, and driving conditions are monitored to identify completion of the identified drive cycle. Upon completion of the identified drive cycle, vehicle data is analyzed to identify an abnormal monitor. Vehicle data is also analyzed to identify an abnormal value of In-Use Monitor Performance Ratio (IUMPR) associated with the abnormal monitor. When an abnormal value of IUMPR is identified, a likely diagnostic condition associated with the identified abnormal IUMPR is further identified.

The invention discloses a vehicle emission conformity online evaluation method and device, a storage medium, equipment and an evaluation method, and the method comprises the following steps: obtaining a remote monitoring data flow of a to-be-evaluated vehicle in a preset time period, carrying out the preprocessing of the remote monitoring data flow, and generating a valid data set; identifying and segmenting a plurality of independent driving cycles from the effective data set, and screening out the independent driving cycles with cold start characteristics and engine accumulated work not smaller than a preset cycle work threshold value as effective driving cycles; dividing the data of each effective driving cycle into a plurality of preset working condition partitions according to the operating characteristics; aiming at each preset working condition subarea, adopting a corresponding calculation model, and calculating a pollutant emission result of the target pollutant; and comparing the pollutant discharge result of the target pollutant in each subarea with a corresponding preset discharge limit value for judgment. By using the scheme of the invention, low-cost, large-scale and high-frequency emission supervision is realized.

A fastening tool comprises a driver member, a controller configured to control a supply of power from a power source to a motor and to initiate a drive cycle, a piston configured to travel between at least two positions in a compression cylinder, a drive assembly, a drive cylinder, and a valve assembly operatively connected with drive cylinder and the compression cylinder. The driver member is at least partially disposed within the drive cylinder for movement along a drive axis to drive a lead fastener into a workpiece. The piston is configured to engage with and open the valve assembly to release the buildup of air in the compression cylinder, due to the travel of the piston between the at least two positions in the compression cylinder, to the drive cylinder so as to move the driver member along the drive axis to drive the lead fastener into the workpiece.

The invention provides a vehicle speed correction method and device, equipment and a medium, and relates to the technical field of vehicle control, and the method comprises the steps: in a current driving period, obtaining a vehicle moving distance, a real-time vehicle speed and vehicle state data of a target vehicle in a first time period; if the real-time vehicle speed and the vehicle state data meet the configured correction triggering rule, the ratio of the vehicle moving distance to the duration of the first time period is determined as the calculated vehicle speed; according to the real-time vehicle speed and the calculated vehicle speed, the actual wheel rolling radius of the target vehicle in the first time period is calculated; and correcting the preset wheel rolling radius of the target vehicle by using the actual wheel rolling radius so as to correct the real-time vehicle speed of the target vehicle in the next driving period. According to the invention, an accurate real-time vehicle speed can still be obtained and vehicle speed interference to an intelligent driving assistance system can be reduced after a vehicle user replaces a tire with the size different from that of an original tire.

The present invention is a piezoelectric actuator drive method, a piezoelectric actuator drive circuit, and a piezoelectric actuator drive system capable of causing a piezoelectric element to vibrate in a maximum amplitude state. The piezoelectric actuator drive circuit includes: an obtainment unit that obtains operation information pertaining to operation of the piezoelectric element in a period that is a part of one cycle of a drive cycle in which the piezoelectric element is driven; and a control unit that performs feedback control of a drive parameter for driving the piezoelectric element based on the operation information.

A method for optimising vehicle calibration parameters, including: providing a representative real world drive cycle to a physical unit under test; generating performance data for the physical unit under test as the physical unit under test traverses the drive cycle; uploading the performance data as training data to generate a digital twin of a system, sub-system or vehicle in which the physical unit under test is configured to be used; providing vehicle performance prediction data from the digital twin to a calibration optimiser; and optimising one or more vehicle calibration parameters using the calibration optimiser.

This application provides a stepper motor driving device, method, and system, relating to the field of equipment control technology. The device includes: a first signal generation module for generating a first SPWM signal and a second SPWM signal; wherein the first SPWM signal and the second SPWM signal have the same waveform but are time-staggered by half a carrier cycle; and a first current control module for applying the first SPWM signal and the second SPWM signal to the upper bridge arm switches on both sides of a first H-bridge driving circuit, respectively, to control the magnitude and direction of the first driving current. This application, by staggering the SPWM control signals on both sides of the same H-bridge by half a cycle, naturally divides the H-bridge behavior into two driving segments and two slow decay modes within a driving cycle, effectively avoiding reverse current during the driving process, reducing operating noise, and improving driving efficiency.

Predictive control techniques for an electrified powertrain of a hybrid electric vehicle (HEV) include maintaining a database of past measured operational parameters of an electrified powertrain during a plurality of past drive cycles of the HEV, monitoring and comparing measured operational parameters of the electrified powertrain during a current drive cycle of the HEV to the past measured operational parameters of the electrified powertrain stored in the database, predicting or estimating operational parameters of the electrified powertrain for a remainder of the current drive cycle of the HEV based on the comparison, and controlling the electrified powertrain during the remainder of the current drive cycle of the HEV based on the predicted / estimated operational parameters of the electrified powertrain including at least controlling recharging of a high voltage (HV) battery system to increase a fuel economy or operational efficiency of the electrified powertrain.

The invention discloses an unmanned express delivery vehicle control system and method based on operation state perception, and relates to the field of unmanned express delivery vehicle control systems. The method comprises the following steps: acquiring vehicle-mounted data in a driving period through a vehicle-mounted sensor array, performing time alignment and validity marking on the vehicle-mounted data to obtain a data quality label, constructing an evidence item set based on the data quality label, generating a sub-portrait label set according to the evidence item set, and displaying the sub-portrait label set in the driving period. And generating a portrait parameter set based on the sub-portrait label set through a preset priority rule and a persistence judgment strategy. Although the scheme has excellent performance in the aspects of improving system adaptability, safety, dynamic decision-making capability, reviewable performance and resource utilization efficiency, the problems of sensor faults, data loss, real-time data processing bottleneck, label interpretation errors and the like may influence the real-time response and decision-making precision of the system in a complex or extreme environment. Therefore, the overall performance and stability are reduced, especially under the condition of high load or low signal.

The application relates to the technical field of driving behavior analysis, and particularly provides a multi-resolution driving working condition identification and classification method. A plurality of time length sliding windows are set to perform multi-scale division on a multi-channel driving time sequence data stream, and a multi-resolution analysis system is constructed; longitudinal driving working conditions are identified and classified according to a yaw angular velocity energy index; a dynamic time warping algorithm is used to match data segments with transverse working condition templates, so that the identification and classification of the transverse driving working conditions are realized; and key driving events are calibrated, thereby providing fine data support for subsequent driving style analysis. The application combines the multi-scale sliding window and time sequence similarity measurement technology, effectively improves the driving working condition identification precision, and significantly reduces the misjudgment rate in complex scenes.

Provided is a stepping motor control device that prevents a terminal voltage of a battery from decreasing even when a plurality of motors are driven simultaneously at a high speed. The stepping motor control device includes: a control unit configured to control a driving unit that drives a plurality of motors including a first motor driven at a prescribed driving cycle, and a second motor driven at a driving cycle that is the same as or an integral multiple of the driving cycle of the first motor to drive the motors by outputting a driving pulse; and a storage unit configured to store a width of the first driving pulse and a width of the second driving pulse. When a sum of a pulse width of the first driving pulse and a pulse width of the second driving pulse is longer than the driving cycle of the first motor, in the driving cycle of the first motor, a part of the first driving pulse and at least a part of the second driving pulse are simultaneously output, and a pause period is provided, in which neither the first driving pulse nor the second driving pulse is output after the first driving pulse and the second driving pulse are output and before a start timing of a next driving cycle of the first motor.

This invention discloses an online evaluation method, apparatus, storage medium, and device for vehicle emission compliance. The evaluation method includes the following steps: acquiring remote monitoring data streams of the vehicle to be evaluated within a preset time period; preprocessing the remote monitoring data streams to generate a valid dataset; identifying and segmenting multiple independent driving cycles from the valid dataset, and selecting independent driving cycles with cold start characteristics and engine cumulative power not less than a preset cycle power threshold as valid driving cycles; dividing the data of each valid driving cycle into multiple preset operating condition zones according to operating characteristics; using a corresponding calculation model for each preset operating condition zone to calculate the pollutant emission results of the target pollutant; and comparing the pollutant emission results of the target pollutant in each zone with the corresponding preset emission limits for determination. This invention achieves low-cost, large-scale, and high-frequency emission supervision.

A fastener driving tool that uses pressurized gas to drive a piston that causes a driver blade to force a fastener into a workpiece, and then uses an induction coil to "lift" the piston (as an armature) back toward the top, pre-drive position. The pressurized gas is not vented to atmosphere, but is instead re-used for multiple drive cycles. An optional induction coil can have multiple stages. A more preferred induction coil includes multiple stages, in which some of those coil stages extend beyond the end stroke of the piston, past a "ready" position for that piston.

The application discloses an EGR control method and system for improving engine power and safety, which comprises the following steps: determining whether the EGR closed-loop enabling time condition is met according to the relationship between the time when the vehicle transmission system enters the parallel state from the series state and the preset time, the target EGR rate and the minimum EGR rate; wherein the preset time is updated in each driving cycle through a self-learning correction coefficient; if the EGR closed-loop enabling time condition is met, determining whether the EGR closed-loop enabling minimum EGR rate condition is met according to the target EGR rate and the minimum EGR rate; if the EGR closed-loop enabling minimum EGR rate condition is met, determining whether to enter the EGR closed-loop enabling, and performing the EGR closed-loop control after the EGR closed-loop enabling, and controlling the mixed valve and the EGR valve to make the actual EGR rate follow the target EGR rate based on the target EGR rate and the actual EGR rate. The application optimizes the EGR closed-loop enabling condition, and improves the engine power and the control stability.

A method and control arrangement for controlling operation of a fan in a cooling system of a vehicle, wherein operation of the fan is controlled based on a temperature of a coolant in the coolant system meeting a set-temperature of the coolant. The method comprises monitoring an engine oil temperature of an engine of the vehicle during a plurality of driving cycles with the vehicle; and adjusting the set-temperature of the coolant based on a measure indicative of a plurality of maximum temperatures of the engine oil during the plurality of driving cycles.

Aspects of the present invention relate to a control system (100) for controlling a driver assistance system indicator system of a vehicle (10). The control system is configured to set a driver assistance system indication mode of a driver assistance system indicator system to a high indication mode at a start of a drive cycle, where the driver assistance system indicator system is configured to indicate operation of a driver assistance system of the vehicle. The control system is configured to output a mode indicator signal for causing the display screen (314, 422) to display a mode indicator (318, 424, 426) in a field of view of a driver of the vehicle looking at a road ahead to indicate that the driver assistance system indicates that the mode is set to a high indication mode. The control system is configured to: receive at least one input signal indicative of a user input to an input element (316, 432) located at a steering wheel (420) of the vehicle and indicative of a request to change a driver assistance system indication mode from a high indication mode; and changing the driver assistance system indication mode from a high indication mode to a different indication mode by disabling one or more of the plurality of operation indicators according to different indication modes in accordance with the at least one input signal. The control system is configured to output a mode change signal configured to cause the display screen (314, 422) to change the mode indicator to indicate that the driver assistance system indication mode is set to a different indication mode.

The invention discloses a vehicle fault diagnosis method, apparatus and device, and a storage medium, belongs to the field of vehicle control, and can solve the problem that an automobile OBD diagnosis system is liable to report a fault by mistake. The method comprises the steps of storing a pending fault code corresponding to a fault in a preset time period under the condition that the fault of the vehicle is detected for the first time; when the fault type of the fault is a first type of fault, storing a confirmation fault code corresponding to the fault in a preset time period; when the fault type of the fault is a second type of fault and the fault is detected again before the driving cycle of the next diagnosis is finished, storing a confirmation fault code corresponding to the fault; and under the condition that a fault lamp lightening request corresponding to a fault in which the confirmation fault code is stored is received, lightening a fault lamp corresponding to the fault, and storing the confirmation fault code as a permanent fault code in a nonvolatile storage device.

This invention relates to the field of pipe blockage detection technology and discloses a pipe blockage detection method for a squeeze-type fluid conveying device, comprising: acquiring at least one response parameter associated with the load state of the squeeze actuator during each squeeze drive cycle; comparing the response parameter with a pre-established normal response model of the squeeze-fluid system; and determining that the fluid pipeline is blocked and triggering a blockage response when the response parameter continuously deviates from the normal response model and meets a preset continuous judgment condition during multiple consecutive squeeze drive cycles. This invention effectively overcomes the problem of strong detection lag in existing technologies by establishing a real-time correlation mechanism between the squeeze action and the pressure change inside the pipe, synchronously acquiring and analyzing pressure signals in each squeeze cycle, thereby achieving dynamic and real-time monitoring of the pipeline status.

The invention relates to an adaptive rule energy management method and device for a hybrid logistics vehicle, and the method comprises the steps: constructing a hybrid logistics vehicle model of a target hybrid logistics vehicle; determining a working mode rule and a plurality of adjustable threshold parameters of a target hybrid logistics vehicle based on the hybrid logistics vehicle model; in the outer layer control process, through a finite difference stochastic approximation extremum search algorithm, global reference rule threshold parameters are iteratively optimized in a whole driving period, and periodic working condition changes of a route are dynamically adapted; in the inner-layer control process, through a pre-trained working condition clustering model, an extreme value is independently used for searching fine adjustment parameters for each type of working conditions, and real-time dynamic differences are accurately dealt with. Therefore, the problems that in an existing energy management strategy method, a fixed parameter rule is difficult to adapt to periodic changes of running characteristics of the plug-in hybrid power logistics vehicle, and single-route global parameter optimization cannot accurately cope with changes of dynamic road conditions and environmental conditions are solved.

This application relates to systems and methods for particulate filter regeneration. A method and system are provided for maintaining a database with details of frequently driven routes and selecting vehicle routes from the database based on particulate filter regeneration requirements. In one example, the method may include selecting one or more routes from the database based on current particulate filter soot levels, fuel efficiency, driving time, operator behavior, etc., and ranking the routes based on the particulate filter regeneration efficiency of each of the one or more routes. When the vehicle key is turned off, the database can be updated using information about the driven routes, including the particulate filter regeneration level achieved during the driving cycle.

A driver assistance apparatus includes an environment recognition unit, a travel state detection unit, a driver assistance control unit, and a driving skill estimation unit. The driver assistance control unit makes a driver assistance control based on an output of the environment recognition unit regarding the environment and an output of the travel state detection unit regarding travel state. The driver assistance control includes assisting a driver in driving in one or both of entering a curved road and traveling along the curved road. The driver assistance control unit changes contents of the driver assistance control, in accordance with the driving skill of the driver estimated by the driving skill estimation unit. The driving skill estimation unit makes the estimation of the driving skill at least once in each driving cycle of the vehicle.

The application discloses a J1939 protocol DM1 function integrated implementation system and method and a vehicle, relates to the field of commercial vehicle parts control, and the system comprises: a power-on initialization module, which is used for reading fault information after the end of a previous driving cycle and traversing the fault information according to a current fault state and a light-on state; an OS Task 1S module, which is used for periodically traversing current fault information; an interrupt module, which is used for triggering the sending of the current fault information at a fixed time; a UDS module, which is used for receiving instructions of an external diagnostic device; a power-off storage module, which is used for storing fault information after the end of a current driving cycle; and a DM1 signal module, which is used for determining the transmission format of the fault information according to the current fault state. According to the technical scheme of the application, the effect of replacing a J1939 protocol DM1 module by using an existing module of a commercial vehicle can be achieved, the development cost is greatly reduced, and the application value is high.

The invention relates to a method for operating the drivetrain of a motor vehicle, wherein a sailing mode is described in which, during travel of the motor vehicle, an internal combustion engine in the drivetrain is disconnected and switched off via an intermediate starting element from at least one drive wheel. To end the sailing mode, the internal combustion engine is started as a tow start, during which the starting element transmits torque between the internal combustion engine and the at least one drive wheel, and the internal combustion engine is subsequently towed by the at least one drive wheel.During the tow start procedure, any slippage of at least one drive wheel occurring during the towing of the internal combustion engine is determined, whereby a blocking notice is generated depending on the determined slippage occurring, with the presence of which further tow starts are prevented during a current driving cycle of the motor vehicle to terminate further sailing operations.

The system creates a logbook for each user profile out of a multitude of user profiles, based on a variety of travel patterns, vehicle type driving cycle information, and load information, resulting in a multitude of logbooks. Based on these logbooks, the system generates a multitude of load profiles for each vehicle component of the vehicle type and determines a load parameter distribution. This distribution is used to update vehicle information. For example, the distribution can be used to reconcile or verify a design parameter, a test parameter, a maintenance parameter, or a warranty parameter.

The invention provides a method, device and equipment for calibrating the liquid demand amount of brake calipers and a medium, and relates to the technical field of vehicle braking. Based on the braking data in the current driving period, a braking abnormity identification strategy is adopted, and it is determined that braking abnormity exists in the vehicle in the current driving period; and when it is determined that braking abnormity exists in the vehicle in the two driving periods adjacent to the current driving period and the current state of the vehicle meets the preset calibration condition, the brake caliper liquid demand amount calibration operation is executed, so that the brake caliper of the vehicle recovers the target brake pressure value, safety function abnormity caused by caliper replacement is avoided, and the safety performance of the vehicle is improved. And the traffic accident occurrence risk is reduced.

A method for controlling an electric vehicle (EV) comprises obtaining a set of models corresponding to functional components, mobility components, and thermal components of the EV. Physical state data of the EV and a driver command input corresponding to a functional component is collected. The method further comprises generating driving cycle data for the EV, based on the physical state data and determining operating points of at least one mobility component, based on the driving cycle data. Each operating point of the plurality of operating points is parameterized by a desired torque and speed of the EV. The method further comprises generating a set of control commands for the functional component, based on the plurality of operating points, the set of models stored in the memory, and the driver command input and controlling the functional component, based on the set of control commands.

To provide a control device for an internal combustion engine capable of executing diagnosis of a catalyst while satisfying an exhaust gas law even in any operation state.SOLUTION: And a ECU10 configured to perform active air / fuel ratio control for diagnosing degradation of the catalytic converter 42 when a diagnosis-time exhaust gas emission amount is less than a predetermined target value, the diagnosis-time exhaust gas emission amount being a value obtained by adding a maximum value of an exhaust gas emission amount per mileage assumed when degradation of the catalytic converter 42 is diagnosed to an exhaust gas emission amount per mileage in a current drive cycle.SELECTED DRAWING: Figure 1

This invention relates to the field of automotive performance testing and autonomous driving virtual simulation technology, specifically a method and system for generating continuous vehicle driving conditions based on GIS road networks and data-driven Markov chains. The method includes four main steps: S1, road topology map construction and OD route planning based on GIS big data; S2, random traffic breakpoint simulation based on a probability distribution model; S3, kinematic envelope construction based on bidirectional physical propagation; and S4, data-driven Markov velocity generation with forward aiming. By constructing a smooth envelope that absolutely conforms to the vehicle's kinematic limits through a unique bidirectional physical propagation algorithm, the abnormal problems of velocity steps and acceleration / deceleration exceeding physical limits in the random generation process of traditional Markov chains are completely solved. The generated driving conditions can be directly used for simulation testing without manual correction.

The invention discloses an electric vehicle discharge evaluation control method, device and system and a vehicle, and the method comprises the steps: obtaining the current time and the starting time of a return plan, and calculating the target time distance difference between the current time and the starting time of the return plan; adjusting the frequency of acquiring the navigation information of the return plan according to the target time distance difference value; regularly entering an evaluation step according to the frequency, and obtaining current working condition allowable energy through the evaluation step; and when the allowable energy of the current working condition is less than 0 or does not meet a preset discharging condition, external discharging is stopped. According to the invention, the frequency of acquiring the navigation information of the return plan is adjusted through the target time distance difference, and the energy demand required in the return plan is determined through the acquired navigation information and the average energy consumption of the latest driving cycle. The evaluation accuracy is improved, and the electricity demand of a user is met to the greatest extent. The invention is mainly used in the technical field of vehicles.

Techniques for using machine learning to generate and use synthetic drive cycles of mobile actors such as a moving person or a mobile machine, as well as technologies for using machine learning to generate and use synthetic duty cycles of mobile machines. Synthetic drive or duty cycle generation and use can be for a person or machine moving from one place to another regardless of the complexity of the corresponding route and the complexity of other variables involved. Mobile machines can include any type of mobile machine for any industrial or consumer use. Mobile machines can include watercraft, aircraft, terrestrial vehicles, automobiles, or robots, for example.