Keyless starting and keyless entry system and working method thereof

Abstract

The invention discloses a keyless starting and keyless entry system and a working method of the keyless starting and keyless entry system. The safety level of an ABS control module of the keyless starting and keyless entry system is a B level, and the safety level of a PEPS control module with a main control unit is a B level. A wheel speed collecting module comprises a fourth wheel speed sensor for collecting the wheel speed of the rear right wheel of an automobile. The ABS control module is used for transmitting the rear right wheel speed which is regarded as the automobile speed to the PEPS control module through a rigid line. The PEPS control module is used for controlling an electronic type steering lock cylinder to be unlocked to make the electronic type steering lock cylinder not to be capable of locking a direction tubular column when an ignition signal of the automobile is OFF and the automobile speed is lower than or equal to a set automobile speed threshold value. According to the keyless starting and keyless entry system and the working method of the keyless starting and keyless entry system, a safety level ASIL D is divided into a mode of ASIL B + ASIL B, and the requirement of the ASIL D of the system can be achieved. Due to the fact that the PEPS control module is simply provided with one main control module, the cost of the whole system is reduced, and the reliability of the whole PEPS system is improved at the same time.

Description

Technical field [0001] The invention relates to the field of automobile automatic control, in particular to a keyless start and keyless entry system and its working method. Background technique [0002] The keyless start and keyless entry system, hereinafter referred to as PEPS (Passive entry&push start) system, shall be designed to take into account the following fail-safe possibilities: When the vehicle is moving, the electronic steering column lock, hereinafter referred to as ESCL ( Electronic steering column lock) locks the steering column, causing serious consequences. According to ISO26262, the failure mode is analyzed in terms of severity of injury (S), probability of occurrence (E) and controllable degree (C), and we can see that: [0003] ①The value of S is 3. If the ESCL locks the direction column during normal driving, it will cause the vehicle to lose control and cause injury, and may endanger life; [0004] ②The value of E is 4, which will cause harm when it occurs on ...

AI Technical Summary

Problems solved by technology

[0003] ①The value of S is 3. If the ESCL locks the steering column during normal driving, it will cause the vehicle to lose control and cause injury, which may endanger life;

[0005] ③ If the value of C is 3, the steering column lock accident occurs during driving, and the driver will find it difficult to control the vehicle

[0009] The defect of the above-mentioned keyless start and keyless entry system in the prior art is that in order to ensure that the PEPS system reaches the safety function level of ASIL D, the PEPS system needs to adopt a dual master control unit solution, which increases the cost of the PEPS system

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