阅读说明：本技术 发动机升温诊断方法、装置、车辆及存储介质 (Engine temperature rise diagnosis method and device, vehicle and storage medium ) 是由 赵兵 陈领平 戴西槐 杜月鑫 王德辉 邵新峰 夏广范 熊华锋 牛胜福 于 2020-07-10 设计创作，主要内容包括：本发明实施例公开了一种发动机升温诊断方法、装置、车辆及存储介质。该方法包括：获取发动机由初始温度上升至预设温度所需的实际升温时间；确定实际升温时间对应的第一标准升温时间及修正系数；根据修正系数对第一标准升温时间进行修正,获得第二标准升温时间；根据实际升温时间和第二标准升温时间确定诊断结果。本发明实施例的技术方案,解决了在发动机热量被用于空调加热或动力电池系统的预热保温时,由于实际升温时间过长而导致升温故障误报的问题,降低了发动机升温故障的误报率,提高了发动机热量的利用率。(The embodiment of the invention discloses an engine temperature rise diagnosis method and device, a vehicle and a storage medium. The method comprises the following steps: acquiring actual temperature rise time required by the engine to rise from the initial temperature to a preset temperature; determining a first standard temperature rise time and a correction coefficient corresponding to the actual temperature rise time; correcting the first standard temperature rise time according to the correction coefficient to obtain a second standard temperature rise time; and determining a diagnosis result according to the actual temperature rise time and the second standard temperature rise time. The technical scheme of the embodiment of the invention solves the problem of temperature rise fault misinformation caused by overlong actual temperature rise time when the heat of the engine is used for heating an air conditioner or preheating and heat preservation of a power battery system, reduces the false alarm rate of the temperature rise fault of the engine, and improves the utilization rate of the heat of the engine.)

1. An engine temperature rise diagnosis method characterized by comprising:

acquiring actual temperature rise time required by the engine to rise from the initial temperature to a preset temperature;

determining a first standard temperature rise time and a correction coefficient corresponding to the actual temperature rise time;

correcting the first standard temperature rise time according to the correction coefficient to obtain a second standard temperature rise time;

and determining a diagnosis result according to the actual temperature rise time and the second standard temperature rise time.

2. The method of claim 1, wherein the obtaining an actual warm-up time required for the engine to rise from an initial temperature to a preset temperature comprises:

starting a first timer when the engine is powered on;

determining the moment when the engine rises from the initial temperature to the preset temperature as a first moment;

and determining the time value of the first timer at the first moment as the actual temperature rise time of the engine.

3. The method of claim 1, wherein said determining a first standard warm-up time corresponding to said actual warm-up time comprises:

calculating the temperature difference between the preset temperature and the initial temperature;

and determining a first standard temperature rise time according to the temperature difference, the initial temperature and the preset temperature.

4. The method of claim 1, wherein determining a correction factor comprises:

acquiring air conditioner heating time and/or battery heating time when the temperature of an engine rises from an initial temperature to a preset temperature;

and determining a correction coefficient according to the air conditioner heating time and/or the battery heating time.

5. The method of claim 1, wherein said correcting said first standard temperature rise time according to said correction factor to obtain a second standard temperature rise time comprises:

and determining the product of the first standard temperature rising time and the correction coefficient as a second standard temperature rising time.

6. The method of claim 1, wherein said determining a diagnostic result based on said actual warm-up time and said second standard warm-up time comprises:

determining that the diagnosis result is failed when the actual temperature rise time is greater than the second standard temperature rise time;

otherwise, determining that the diagnosis result is a pass.

7. An engine temperature rise diagnostic device characterized by comprising:

the temperature rise time acquisition module is used for acquiring the actual temperature rise time required by the engine to rise from the initial temperature to the preset temperature;

the coefficient determining module is used for determining a first standard temperature rise time and a correction coefficient corresponding to the actual temperature rise time;

the temperature rise time correction module is used for correcting the first standard temperature rise time according to the correction coefficient to obtain second standard temperature rise time;

and the diagnosis result determining module is used for determining a diagnosis result according to the actual temperature rise time and the second standard temperature rise time.

8. The apparatus of claim 7, wherein the warm-up time acquisition module comprises:

the timer starting unit is used for starting a first timer when the engine is powered on;

the time determining unit is used for determining the time when the engine rises from the initial temperature to the preset temperature as a first time;

and the temperature rise time determining unit is used for determining the time value of the first timer at the first moment as the actual temperature rise time of the engine.

9. A vehicle, characterized in that the vehicle comprises:

at least one timer;

one or more controllers;

storage means for storing one or more programs;

when the one or more programs are executed by the one or more controllers, the one or more controllers are caused to implement the engine warm-up diagnostic method of any of claims 1-6.

10. A storage medium containing computer-executable instructions for performing the engine warm-up diagnostic method of any one of claims 1-6 when executed by a computer processor.

Technical Field

The embodiment of the invention relates to the technical field of engine control, in particular to an engine temperature rise diagnosis method and device, a vehicle and a storage medium.

Background

The engine cooling system is a very critical system on the vehicle, and no matter the traditional fuel vehicle, the hybrid vehicle or the pure electric vehicle, a series of monitoring and diagnosis must be carried out on the cooling system, so that the aim of normal running of the vehicle is fulfilled.

The temperature rise diagnosis of the traditional fuel vehicle on the engine cooling system is usually carried out by acquiring the temperature rise time of the engine coolant, namely, by comparing the time for the engine coolant to reach the temperature regulated by the regulation with a set time standard. When the electric range extender developed on the basis of the engine is applied to the pure electric vehicle, the cooling system of the engine can be coupled with other systems in the whole vehicle, so that when the vehicle is used in a hybrid mode, heat generated by the engine can be used for heating an air conditioner and also can be used for preheating and insulating a power battery system.

However, when the heat generated by the engine is used for air conditioning heating or the power battery system is preheated and insulated, the temperature rise time of the engine coolant may be prolonged, and if the temperature rise diagnosis method of the traditional fuel vehicle is also adopted, the temperature rise fault of the engine cooling system can be mistakenly reported. Meanwhile, if the heat generated by the engine is prohibited to be used for heating the air conditioner or the power battery system in order to ensure the accuracy of the temperature rise diagnosis of the engine cooling system, the heat of the engine is not fully utilized, and the energy waste of the whole vehicle is caused.

Disclosure of Invention

The invention provides an engine temperature rise diagnosis method, an engine temperature rise diagnosis device, a vehicle and a storage medium, which are used for realizing the engine temperature rise diagnosis when engine heat is used for heating an air conditioner and/or a power battery, reducing the false alarm rate of engine temperature rise faults and improving the utilization rate of the engine heat.

In a first aspect, an embodiment of the present invention provides an engine temperature rise diagnosis method, including:

acquiring actual temperature rise time required by the engine to rise from the initial temperature to a preset temperature;

determining a first standard temperature rise time and a correction coefficient corresponding to the actual temperature rise time;

correcting the first standard temperature rise time according to the correction coefficient to obtain a second standard temperature rise time;

and determining a diagnosis result according to the actual temperature rise time and the second standard temperature rise time.

Further, acquiring the actual temperature rise time required by the engine to rise from the initial temperature to the preset temperature comprises the following steps:

starting a first timer when the engine is powered on;

determining the moment when the engine rises from the initial temperature to the preset temperature as a first moment;

and determining the time value of the first timer at the first moment as the actual temperature rising time of the engine.

Further, determining a first standard time corresponding to the actual temperature rise time includes:

calculating the temperature difference between the preset temperature and the initial temperature;

and determining a first standard temperature rise time according to the temperature difference, the initial temperature and the preset temperature.

Further, determining a correction factor includes:

acquiring air conditioner heating time and/or battery heating time when the temperature of an engine rises from an initial temperature to a preset temperature;

and determining a correction coefficient according to the heating time of the air conditioner and/or the heating time of the battery.

Further, correcting the first standard temperature rise time according to the correction coefficient to obtain a second standard temperature rise time, including:

and determining the product of the first standard temperature rising time and the correction coefficient as a second standard temperature rising time.

Further, determining a diagnosis result according to the actual temperature rise time and the second standard temperature rise time includes:

when the actual temperature rise time is larger than the second standard temperature rise time, determining that the diagnosis result is failed;

otherwise, the diagnosis result is determined to be passed.

In a second aspect, an embodiment of the present invention further provides an engine temperature rise diagnostic apparatus, including:

the temperature rise time acquisition module is used for acquiring the actual temperature rise time required by the engine to rise from the initial temperature to the preset temperature;

the coefficient determining module is used for determining a first standard temperature rise time and a correction coefficient corresponding to the actual temperature rise time;

the temperature rise time correction module is used for correcting the first standard temperature rise time according to the correction coefficient to obtain second standard temperature rise time;

and the diagnostic result determining module is used for determining a diagnostic result according to the actual temperature rising time and the second standard temperature rising time.

Further, the warm-up time acquisition module includes:

the timer starting unit is used for starting a first timer when the engine is powered on;

the time determining unit is used for determining the time when the engine rises from the initial temperature to the preset temperature as a first time;

and the temperature rise time determining unit is used for determining the time value of the first timer at the first moment as the actual temperature rise time of the engine.

In a third aspect, an embodiment of the present invention further provides a vehicle, including:

at least one timer;

one or more controllers;

storage means for storing one or more programs;

when the one or more programs are executed by the one or more controllers, the one or more controllers are caused to implement the engine warm-up diagnostic method as provided in any embodiment of the invention.

In a fourth aspect, embodiments of the present invention also provide a storage medium containing computer-executable instructions, which when executed by a computer processor, are configured to perform the engine warm-up diagnostic method according to any of the embodiments of the present invention.

According to the embodiment of the invention, the actual temperature rise time required by the engine to rise from the initial temperature to the preset temperature is obtained; determining a first standard temperature rise time and a correction coefficient corresponding to the actual temperature rise time; correcting the first standard temperature rise time according to the correction coefficient to obtain a second standard temperature rise time; and determining a diagnosis result according to the actual temperature rise time and the second standard temperature rise time. Determining a first standard temperature rise time and a correction coefficient corresponding to the actual temperature rise time according to the initial temperature and the preset temperature of the engine, correcting the first standard temperature rise time through the correction coefficient, and judging whether the temperature rise fault occurs to the engine or not according to the corrected first standard temperature rise time and the actual temperature rise time. The correction coefficient is introduced to correct the first standard time, so that the problem of temperature rise fault misinformation caused by overlong actual temperature rise time when the heat of the engine is used for heating an air conditioner or preheating and insulating a power battery system is solved, the false alarm rate of the temperature rise fault of the engine is reduced, and the utilization rate of the heat of the engine is improved.

Drawings

FIG. 1 is a flow chart of a method for diagnosing engine temperature rise according to a first embodiment of the present invention;

FIG. 2 is a flowchart of an engine temperature rise diagnostic method according to a second embodiment of the present invention;

fig. 3 is a schematic structural diagram of an engine temperature rise diagnosis apparatus in a third embodiment of the present invention;

fig. 4 is a schematic structural diagram of a vehicle according to a fourth embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures. In addition, the embodiments and features of the embodiments in the present invention may be combined with each other without conflict.