CN-121989677-A - Control device for vehicle

CN121989677ACN 121989677 ACN121989677 ACN 121989677ACN-121989677-A

Abstract

The invention aims to provide a control device for a vehicle, which can accumulate data capable of accurately judging whether the failure of an engine is caused by past overspeed. The control device for a vehicle is provided with an engine, and is provided with a storage unit that stores occurrence data indicating the occurrence of an excessive rotation of the engine, the occurrence data being a preset number of times of the excessive rotation, and a recording unit that, when the excessive rotation is detected, associates and records in the storage unit at least one of 1 st data relating to a transition of the rotational speed of the engine after the excessive rotation is reached and 2 nd data by which it is possible to estimate whether the vehicle is traveling 1 st corresponding to a racing track.

Inventors

MATSUO KANJI
TIAN YUANCHUN

Assignees

丰田自动车株式会社

Dates

Publication Date: 20260508
Application Date: 20251023
Priority Date: 20241108

Claims (3)

1. A control device for a vehicle provided with an engine, the control device comprising: A storage unit for storing occurrence data indicating occurrence of the excessive rotation of the engine, the occurrence data being stored for a predetermined number of times of occurrence of the excessive rotation, and And a recording unit that, when the excessive rotation is detected, associates and records in the storage unit at least one of 1 st data related to a transition of the rotational speed of the engine after the excessive rotation is reached and 2 nd data that can estimate whether or not the vehicle is traveling 1 st corresponding to the track traveling with the occurrence data.
2. The control device for a vehicle according to claim 1, wherein, The recording unit, when the excessive rotation is detected, associates and records, in the storage unit, at least one of 3 rd data relating to an absolute value of an acceleration of the vehicle after the excessive rotation is reached and 4 th data relating to an accelerator opening corresponding to a depression operation amount of an accelerator pedal provided in the vehicle, with the occurrence data.
3. The control device for a vehicle according to claim 1 or 2, characterized in that, The recording unit is configured to record, in the storage unit, at least 1 st of data relating to a transition of the rotational speed of the engine after the over-rotation is reached, data 2 nd of data capable of estimating whether or not the vehicle is traveling 1 st corresponding to a racing track, data 3 rd of data relating to an absolute value of an acceleration of the vehicle after the over-rotation is reached, and data 4 th of data relating to an accelerator opening corresponding to a depression operation amount of an accelerator pedal provided in the vehicle, the data being capable of generating a histogram for discriminating between the traveling 1 st and the traveling 2 nd different from the traveling 1 st, in association with the generated data.

Description

Control device for vehicle Technical Field The present invention relates to a control device for a vehicle. Background If the engine speed is equal to or greater than a predetermined threshold, the engine may be over-rotated, that is, overspeed, and engine damage may be assumed. Since it is necessary to avoid engine damage, it is known that when the engine speed is equal to or higher than a threshold value, data of 10 seconds before and after the time when the engine speed is equal to or higher than the threshold value is associated and stored. Specifically, data such as date and time or vehicle speed information, shift position information, total travel distance information, and the like are stored. Such data is used for fault diagnosis (for example, refer to patent documents 1 and 2). Patent document 1 Japanese patent application laid-open No. 2012-013486 Patent document 2 Japanese patent application laid-open No. 2018-092342 Disclosure of Invention In a track mode for improving the running performance of a vehicle on a track field, there is a case where control of a speed limiter for releasing the occurrence of the overspeed is performed. By this control, the vehicle can run on the track at an engine speed higher than the threshold maximum speed before the release of the speed limiter. By improving the running performance of the vehicle, the driver of the vehicle can feel the fun of racing. The racetrack mode is selected based on the intentional operation by the driver. However, if the racetrack mode is selected, the likelihood of overspeed occurring increases. As a result, a high load is applied to the engine, and a failure of the engine such as engine damage is induced. The failure of the engine is not limited to being generated during running on the track field, and may be assumed to be generated during running on a general road several months after the running on the track field is completed. In this case, in the storage of the data, it is difficult to accurately determine whether or not the failure of the engine is caused by the past overspeed. Accordingly, an object of the present invention is to provide a control device for a vehicle that accumulates data that enables accurate determination of whether or not an engine failure has occurred due to past overspeed. A vehicle control device is provided with an engine, and is provided with a storage unit which stores occurrence data indicating the occurrence of an excessive rotation of the engine in a preset number of times of occurrence of the excessive rotation, and a recording unit which, when the excessive rotation is detected, associates and records in the storage unit at least one of 1 st data relating to a transition of the rotational speed of the engine after the excessive rotation is reached and 2 nd data by which the presence or absence of a1 st running corresponding to a racing running of the vehicle can be estimated. In the above configuration, when the excessive rotation is detected, at least one of the 3 rd data relating to the absolute value of the acceleration of the vehicle after the excessive rotation is reached and the 4 th data relating to the accelerator opening corresponding to the depression operation amount of the accelerator pedal provided in the vehicle may be associated with the occurrence data and recorded in the storage unit. In the above configuration, the recording unit may be configured to record, in the storage unit, at least 1 of 1 st data related to a transition of the rotational speed of the engine after reaching the over-rotation, 2 nd data capable of estimating whether or not the vehicle is traveling 1 st corresponding to a track traveling, 3 rd data related to an absolute value of an acceleration of the vehicle after reaching the over-rotation, and 4 th data related to an accelerator opening corresponding to a depression operation amount of an accelerator pedal provided in the vehicle, the data being capable of generating a histogram for discriminating between the traveling 1 st and the traveling 2 nd different from the traveling 1 st, in association with the generated data. Effects of the invention According to the present invention, it is possible to accumulate data that enables accurate determination of whether or not an engine failure is caused by past overspeed. Drawings Fig. 1 is a schematic diagram schematically showing a structure of a vehicle. Fig. 2 is a flowchart showing an example of the operation of the engine ECU. Fig. 3 (a) shows an example of engine speed transition data. Fig. 3 (b) shows an example of the travel record data. Fig. 4 (a) is an example of an acceleration waveform of the left-right acceleration. Fig. 4 (b) shows an example of the time-average and frequency distribution of the absolute values of the left and right accelerations. Detailed Description The mode for carrying out the present invention will be described below with reference to the accompanying drawings. As shown in fig. 1, a