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A technology for safety protection and vehicles, which is applied to vehicle parts, transportation and packaging, circuits or fluid pipelines, etc. It can solve problems such as the key switch being turned off accidentally, ECU power failure, etc., and achieves the effect of realizing safety protection and solving potential safety hazards
Active Publication Date: 2019-03-29
WEICHAI POWER CO LTD
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Abstract
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[0006] The purpose of the present invention is to provide a vehicle safety protection method and device to solve the problem that the key switch in the prior art is accidentally closed, causing the ECU to be powered off, and to improve the safety of the vehicle operation
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Embodiment 1
[0025] Such as figure 1 As shown, a vehicle safety protection method provided by the present invention may specifically include the following steps:
[0026] S100, query engine state information;
[0027] The engine status information can be specifically: when the engine is started, the output pin of the engine is high voltage, and the engine status information is recorded as 1; when the engine is not started, the output pin of the engine is low voltage, and the engine status information is recorded as 0 .
[0028] S200. Determine whether the engine is running according to the engine state information, and if the engine is running, query the key switch information;
[0029] When the query engine status information is 0, it is determined that the engine is not started, and the operation of the engine is only controlled by the key switch, and the engine is started by turning on the key switch.
[0030] When the query engine state information is 1, it is determined that the en...
Embodiment 2
[0041] Such as figure 2 As shown, it is a vehicle safety protection device of the present invention, comprising:
[0042] The query module is used to query engine status information, key switch information, real-time vehicle speed and real-time engine speed;
[0043] A judging module, configured to judge whether the engine is running, whether the key switch is off, whether the real-time speed of the vehicle is less than the set speed and whether the real-time speed of the engine is less than the set speed according to the query information of the query module;
[0044] The control module is used to control whether the engine stops running according to the judgment information of the judgment module.
[0045] The specific process will be described in further detail below.
[0046] The query module queries engine status information, key switch information, real-time vehicle speed and real-time engine speed;
[0047] The judging module judges whether the engine is running acc...
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Abstract
The invention provides a vehicle safety protection method. The method comprises the following steps: inquiring engine state information; judging whether the engine operates or not; if so, inquiring key switch information; judging whether the key switch is turned off or not; if so, inquiring the real-time speed of the vehicle and the rotating speed of the engine; if the real-time speed is smaller than a set speed and the real-time rotating speed is smaller than a set rotating speed, stopping the engine. The invention also provides the vehicle safety protection device which comprises an inquiring module, a judging module and a control module, wherein the inquiring module inquires the engine state information, the key switch information, the real-time speed of the vehicle and the real-time rotating speed of the engine; the judging module judges whether the engine operates or not, the key switch is turned off or not, the real-time speed of the vehicle is smaller than the set speed or not and the real-time rotating speed of the engine is smaller than the set rotating speed or not according to the inquired information; and the control module controls the engine to operate according to the judged information. By comparing the real-time speed with the set speed and the real-time rotating speed with the set rotating speed, the engine is controlled; in a safe working condition, ECU is powered off, so that accidents are avoided.
Description
technical field [0001] The invention relates to the technical field of automobile safety, in particular to a vehicle safety protection method and device. Background technique [0002] ECU (Electronic Control Unit) is the core of the automobile engine control system. It can provide the engine with the best air-fuel ratio mixture and the best ignition time according to the different working conditions of the engine, so that the engine is always in the best working state. Through fuel injection quantity control, fuel injection timing control, fuel cut control and fuel pump control, the performance of the engine (power, economy, emission) can be optimized. [0003] The existing engine control unit has 4 positive poles and 4 negative poles as the power supply lines of the ECU, which are normal electricity. The key switch supplies power to the ECU and is the wake-up switch of the ECU. Only when the pin of the key switch is always at high voltage, the ECU is in the working state, ...
Claims
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Application Information
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