Low-speed warning sound system for hybrid vehicle model

Abstract

The invention discloses a low-speed warning sound system for a hybrid vehicle model. The low-speed warning sound system is formed by connecting a vehicle controller, a manual master switch and a buzzer. Specifically, the vehicle controller is connected to a GND line through a relay, one foot of the buzzer is connected to an ACC line through the manual master switch, and the other foot of the buzzer is connected to the GND line. One foot of the relay is connected to a node between the buzzer and the manual master switch. The vehicle controller outputs an enable signal to the buzzer for controlling sound output according to the operation state of the hybrid vehicle model. The manual master switch manually turns on or turns off a power input of the buzzer. The buzzer simulates the idle speedsound of an engine. The low-speed warning sound system is simple in structure, reasonable in design and high in practicability, and only when the hybrid vehicle model is in a pure electricity runnablemode and the vehicle speed is lower than 20 km / h, the engine sound is simulated and sent out to prompt pedestrians.

Description

Technical field [0001] The invention belongs to the technical field of hybrid vehicles, and relates to a low-speed warning sound system, in particular to a low-speed warning sound system for a hybrid vehicle. Background technique [0002] According to GB7258-2017 "Safety Technical Conditions for Motor Vehicle Operation", Article 12.13, Special requirements for pure electric vehicles and plug-in hybrid electric vehicles, Article 12.13.2: "Pure electric vehicles, plug-in hybrid electric vehicles in vehicles When starting and the vehicle speed is lower than 20km / h, it should be able to give out appropriate reminder sounds to people outside the vehicle.” [0003] The existing low-speed alarm and warning sound system is suitable for pure electric vehicles. When it is lower than 20km / h, it will judge and emit a warning sound according to the vehicle speed. However, hybrid models have their own engine system, even when the vehicle speed is lower than 20km / h, As long as the engine start c...

AI Technical Summary

Problems solved by technology

[0003] The existing low-speed alarm and warning sound system is suitable for pure electric vehicles. When the vehicle speed is lower than 20km / h, it judges and sends out a warning sound according to the vehicle speed. However, the hybrid vehicle has an engine system. As long as the engine start condition is met, the engine will start, and if the engine stop condition is met, the engine will stop. At this time, if the real sound of the engine is not judged and the alarm sound is issued, the two sounds will exist at the same time, which will affect the comfort of passengers. , and there are many working states of hybrid vehicles, sometimes the driver can judge whether the engine is involved in the work according to the engine start-stop status and whether the vehicle's operating mode is normal, so as long as it is lower than 20km / h, the alarm prompt sound is obviously not applicable to hybrid vehicles car models, which requires a low-speed alarm warning sound system that can

Images