Analytic method and device for automobile power signal
A technology of power signal and automobile power supply, which is applied in electric vehicle charging technology, vehicle components, transportation and packaging, etc., and can solve problems such as power signal accuracy interference
Active Publication Date: 2019-10-25
SAIC MOTOR
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Problems solved by technology
[0005] In order to solve the technical problem that when any of the above-mentioned controllers fails, it will interfere with the accuracy of the analyzed power signal, the present invention provides a method and device for analyzing the power signal of an automobile
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[0054] Embodiments of the present invention provide a method and device for analyzing automotive power signals. In order to make the above-mentioned purpose, features and advantages of the present invention more obvious and understandable, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0055] see figure 1 , which is a method flowchart of an analysis method for a vehicle power signal of the present invention, the method is applied in a hybrid vehicle controller HCU, and includes the following steps:
[0056] S101: Obtain the first power signal analyzed by the main controller according to the driver's key operation;
[0057] The first power signal is one of an OFF signal, an accessory ACC power-on signal, a RUN signal and a CRANK signal.
[0058] S102: Obtain a second power signal analyzed by the standby controller according to the key operation;
[0059] The second power signal is one of an OFF signal,...
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An analytic method and device for an automobile power signal are applied to a hybrid power vehicle control unit (HCU). A first power signal analyzed by a master controller according to key operation of a driver is obtained; a second power signal analyzed by a spare controller according to key operation is obtained; the electrical level state of a first hardwire signal caused by key operation is determined, the electrical level state of a second hardwire signal caused by key operation is determined, and a third power signal is analyzed according to the combination of the electrical level statesof the first hardwire signal and the second hardwire signal; and whether communication failure exists in a CAN network is diagnosed, and the final automobile power signal is determined from the firstpower signal, the second power signal and the third power signal according to diagnosis result and a key signal on the CAN network. In the analytic method and device, when failure appears in any oneof or in both the master controller and the spare controller, the HCU can still analyze the accurate power signal, and thus the whole system has high interference resistance.
Description
technical field [0001] The invention relates to the technical field of hybrid electric vehicle control, in particular to a method and device for analyzing a vehicle power supply signal. Background technique [0002] Whether in the field of new energy vehicles or in the field of traditional vehicles, the power signal is one of the most important signals, which directly reflects the driver's most direct demand for the state of the vehicle. [0003] The power signal usually includes four states: OFF / LOCK, ACC, RUN, START / CRANK. The power signal of traditional cars is often analyzed through the high and low levels of hard wires to meet the driver's intention to power on and off. With the popularity of CAN networks in cars, more and more cars are beginning to use The combination of "CAN signal and hard wire signal" is used to analyze the exact power signal to meet the driver's power on and off intention. [0004] Compared with traditional vehicles, new energy vehicles use CAN n...
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IPC IPC(8): B60R16/023
CPCB60R16/0232Y02T90/16
Inventor 窦希江曹则张王民蒋新华许永莉
Owner SAIC MOTOR