JP4275067B2 - Method for collecting data from motor driven vehicles - Google Patents

Abstract

The invention relates to a method for collecting data from a motor-driven vehicle, which is provided with a microprocessor with memory for storing a particular quantity of data. The data is provided by a number of sensors connected to the vehicle and its motor and is recorded and compiled into a specific data file upon each recording occasion, when it its ascertained that conditions are fulfilled for recording a data file. This is recorded as a non-erasable reference data file. Upon subsequent occasions when the conditions are fulfilled, a number of successively erasable data files are successively recorded and stored within the predetermined quantity of data.

Description

  According to the present invention, a motor-driven vehicle including a microprocessor having a storage device for storing a specific amount of data is supplied by a number of sensors connected to the vehicle and the motor, and a specific data file is recorded at each recording. It relates to a method for collecting data to be recorded and compiled.

  In modern vehicles, it is difficult and time consuming to find a fault, for example, when the function is stopped. At the same time, issues can arise with regard to warranty and whether the vehicle has been used properly or whether the vehicle has been tampered with in some way by the user. In addition, it may be advantageous to be able to quickly ascertain whether the replacement of critical components such as turbo compressors has caused problems to be corrected.

  These problems occur particularly with large vehicles such as over-used long haul trucks. In addition, these vehicles are optimized for use within an output range that is relatively close to maximum output. Furthermore, very high demands are made regarding the fuel economy of these vehicles.

  Thus, there is a need for a method and system that can continuously record engine data. An example of a known system for this purpose is to continuously log data until the storage device is full, after which the oldest record in the storage device is overwritten sequentially. In this system, historical data over a certain period in the past can be obtained.

  The length of this period is determined by the storage capacity of the storage device. If this capacity can be reduced, it is economically advantageous.

  Accordingly, it is an object of the present invention to achieve a method that enables a cost effective and efficient system solution in a method for collecting data from a motor driven vehicle.

  For this purpose, the method according to the invention comprises the steps of ensuring that the conditions for recording the data file are met, recording the data file as an erasable reference data file, and thereafter When satisfied, the method sequentially records and stores a number of sequentially erasable data files within a predetermined amount of data. When the method is designed in this way, the result is that the amount of data includes both non-erasable reference data and erasable logging data, which makes the system solution very cost effective. It means that it can be.

  Advantageous embodiments of the invention are described in the following dependent claims.

  In the following, the invention will be described in more detail with reference to the embodiments shown in the accompanying drawings.

  The method according to the invention is intended to be used for recording state information consisting of a number of operating parameters of a drive motor attached to a vehicle. These operating parameters may vary depending on, for example, the type of motor to which the method is applied and the field of use of the motor and what information is available. Thus, the development of new types of sensors can open up new possibilities for information about motor status. In addition, as new legislation is enacted, it may be necessary to add certain new operating parameters as a result. For this reason, the following example includes only one example of what such state information can constitute.

  The status information recorded during the same recording can consist of, for example, the following operating parameters: cooling fan speed, vehicle speed, accelerator position, engine load, fuel supply pressure, hydraulic pressure, turbocharger Pressure, turbo temperature, ambient air pressure, coolant temperature, crankcase pressure, inlet air temperature, oil temperature, fuel load, engine speed, EGR, total mileage and total motor operating time.

  Using this state information, it is possible to determine the state of the motor and to study historical trends in the life of the motor. The electronic diagnostic tool can be used to present the status information to the user after reading and processing the status information.

In the present embodiment, there are four different events where the recording of state information is performed. After each of these events, recording is performed as soon as all recording conditions are met. The status information is stored in either a rolling register or a special storage device depending on the event that causes the recording to be performed. The storage structure can be designed as follows:

  The first state recording is performed only when the motor is brand new and all the conditions for recording are met. This record is never overwritten.

  The second state recording is performed after the motor has been operated for a certain number of hours corresponding to the standard break-in period of the motor. This record is never overwritten.

  The use of the two remaining storage entries in the special status storage device can be triggered by an electronic diagnostic tool when a critical component in the motor is replaced, for example when the turbo device is replaced. These trigger records can be periodically overwritten. The triggered state recording is performed as soon as all conditions for recording are met.

  In this embodiment, the standard register for status recording includes 15 memory entries that are periodically overwritten with an appropriate minimum period. The time operating state record or the failure discovery record by the diagnostic tool is performed as soon as all the conditions for recording are fulfilled.

  In order for different operating parameters in the state record to contain relevant repeatable data, several prerequisites need to be met before triggering or time operating state recording can be performed. For example, the sensor included in the recording condition must be operating properly. In addition, the condition is that the motor is not in the so-called motor protection mode.

  Assuming that these preconditions are met and that state recording is either triggered or time activated, yet another condition for state recording needs to be satisfied. For example, the motor coolant temperature is within a certain range, the engine load is high (close to maximum torque) or has a high torque requirement, the air pressure is standard, and the motor protection mode is activated. And the engine speed must be reduced within a specific engine speed range.

  The condition regarding engine load means that the engine load must be high for a certain period of time, for example several seconds. If the motor is not “healthy”, the device that reduces emissions may limit the torque when the torque requirements are high.

  The condition for engine speed reduction occurs only when other conditions are met and occurs when the engine speed is decreasing within the engine speed range. If the engine speed increases within the range, this condition is immediately invalid. Please refer to FIG.

  FIG. 1 is a graph showing engine speed on the X axis and torque on the Y axis, which is a conventional torque graph 10 for an internal combustion engine. FIG. 2 is a diagram showing the relationship between the change in engine speed and the passage of time, which is a condition for recording when the engine speed decreases by a specific rotation speed C within the engine speed range A to B. This is to confirm that the engine is operating at full load and thus to obtain suitability in data collection. D shows the achievement of the conditions over time.

  An electronic diagnostic tool that can be connected to the vehicle data system can be used to trigger the recording of the data file when conditions are met. This is used especially when a failure is detected in a vehicle.

  The present invention should not be regarded as limited to the embodiments described above, but numerous other developments and modifications are possible within the scope of the following claims.

It is a diagram which shows the torque graph of a motor. It is a diagram which shows the scenario of the time-dependent change of the engine speed used as recording conditions.

Claims (7)

A motor-driven vehicle having a microprocessor having a storage device for storing a specific amount of data is supplied by a number of sensors connected to the vehicle and the motor, and is recorded and compiled in a specific data file at the time of each recording. In the method of collecting data,
Verifying that the conditions for recording the data file are met,
Recording the output data file of the motor status information supplied by the sensor as the non-erasable reference data file when the vehicle is manufactured ;
During actual running of subsequent of the vehicle, if the condition is satisfied, sequential output data file of the status information of the motor supplied by the sensor, as a number of sequential erasable data files within the scope of the predetermined amount of data Recording and memorizing stage,
A method wherein the state of the motor can be sequentially determined by comparing the non-erasable reference data file and the erasable data file .   The method of claim 1 including recording an additional non-erasable reference data file during a break-in or when the vehicle has just finished its break-in period.   3. A method according to claim 1 or 2, comprising recording a reference data file when the vehicle undergoes an important motor component replacement.   4. The method of claim 3, including recording an erasable reference data file when the vehicle receives a post-replacement of motor components.   5. A method according to claim 3 or 4, comprising the step of sequentially recording and storing additional sequentially erasable reference data files upon subsequent replacement of important motor components.   6. A method according to any one of the preceding claims, characterized in that the calculation and estimation data are also recorded in a data file in addition to such data generated by the sensor.   7. A method according to any one of the preceding claims, comprising the step of triggering data file recording by a diagnostic tool used when a fault is detected for the vehicle when a condition is met.

Images