CN201816459U - Combination instrument - Google Patents

Abstract

The utility model discloses a combination meter, which aims at providing a combination meter which can prevent users from changing without permission. It includes conventional functional modules and power supply, the combination instrument also includes anti-theft module and coil, and the anti-theft module is connected with engine ECU. The coil can read the information of the anti-theft chip in the key. After installing or replacing the combination meter, it is necessary to use a special diagnostic device to match the combination meter with the engine ECU and the anti-theft chip. If the user replaces the combination meter by himself without using the diagnostic equipment for matching, the engine cannot be started. If the key with the wrong anti-theft chip is used, the engine cannot be started. The utility model is suitable for all automobile combination meters.

Description

Instrument cluster

technical field

The utility model relates to an automobile meter device, in particular to a combined meter with the function of preventing unauthorized replacement.

Background technique

At present, the instruments on many vehicles can be freely replaced by users, and do not require professional equipment to adjust. However, after the user replaces the meter by himself, the actual mileage will be reduced, the maintenance mileage will be extended, and there will be safety hazards. Especially when changing the odometer when the second-hand car is traded, the selling price of the vehicle will be greater than its actual value, defrauding buyers and endangering the interests and safety of consumers.

The State Intellectual Property Office of the People's Republic of China published the patent document whose authorized announcement number is CN201257907Y on June 17, 2009, and the name is an automobile combination instrument. It includes instrument housing, circuit board, dial bracket, dial, instrument pointer, instrument panel, surface glass, connectors, liquid crystal; the instrument contains speedometer, odometer, engine tachometer, coolant temperature gauge, oil gauge , engine oil pressure gauge, two brake air pressure gauges, vehicle voltmeter and alarm indicator lights; speedometer, engine tachometer, coolant temperature gauge, oil level gauge, and two brake air pressure gauges are respectively equipped with stepping motors; mileage The gauge, engine oil pressure gauge and voltmeter are displayed together by one liquid crystal; the engine oil pressure gauge and voltmeter are displayed by light beams. The disadvantage of this solution is that it cannot prevent the user from replacing the instrument without permission, and the user can cover the actual mileage and prolong the maintenance cycle by replacing the instrument by himself, which brings great safety hazards.

Contents of the invention

The utility model mainly solves the technical problem in the prior art that the user cannot prevent the instrument from being replaced by itself, and provides a combined instrument with the function of preventing unauthorized replacement.

The above-mentioned technical problems of the utility model are mainly solved by the following technical solutions: a combined meter, including a conventional functional module and a power supply, the combined meter also includes an anti-theft module, and the anti-theft module is connected with the engine ECU. After installing or replacing the combination meter, it is necessary to use special diagnostic equipment to match the combination meter and engine ECU. If the user replaces the combination meter by himself without using the diagnostic equipment for matching, the engine cannot be started.

Preferably, the anti-theft module is connected with a coil capable of reading the information of the anti-theft chip in the key. When starting the engine, the anti-theft module reads the contents of the anti-theft chip through the coil to prevent the master key or other abnormal means from starting the car.

Preferably, the anti-theft module has a unique code. The anti-theft modules upstream of different combination instruments have different codes. The engine ECU and key will detect the codes when starting. If the current anti-theft module codes are different from the set codes, they will refuse to start the engine.

Preferably, the memory storing the code of the anti-theft module is a read-only memory, which prevents the user from changing the code of the anti-theft module to start the engine after changing the combination instrument without authorization.

The beneficial effect brought by the utility model is that the user can not replace the combination meter without permission through the unique code, avoiding the user from changing the combination meter by himself to prolong the maintenance mileage, and ensuring that the vehicle can be started only with a legal key, which improves safety sex.

Description of drawings

Fig. 1 is a kind of structural diagram of the utility model;

Fig. 2 is a kind of signal connection figure of the utility model;

In the figure: 1. anti-theft module, 2. power supply, 3. conventional function module, 4. key, 5. engine ECU, 6. coil, 41. anti-theft chip.

Detailed ways

The technical solutions of the present utility model will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

Embodiment: A combination meter of this embodiment, as shown in FIG. 1 , includes an anti-theft module 1 , a power supply 2 , a coil 6 and a conventional function module 3 . The power supply 2 supplies power to the normal function module 3 and the anti-theft module 1 . As shown in FIG. 2 , the anti-theft module 1 is also connected to the coil 6 and the engine ECU 5 respectively. An anti-theft chip 41 is encapsulated in the key 4 . The anti-theft module 1 can read the information in the anti-theft chip 41 through the coil 6, thereby judging whether the key 4 is correct or not. The anti-theft module 1 has a unique and unalterable code. After the combination instrument is installed or replaced, it is necessary to use a dedicated diagnostic device to match the anti-theft chip 41, the anti-theft module 1, and the engine ECU5. When the key 4 is placed in the ON gear before the engine starts, the anti-theft module 1 reads the information in the anti-theft chip 41 of the key 4 through the coil 6 to judge whether it matches. If the code is the same as the pre-set code, it can be activated if it is the same, and if it is different, it will be refused to activate.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.

Although terms such as anti-theft module, anti-theft chip, and engine ECU are frequently used in this paper, the possibility of using other terms is not excluded. These terms are used only for the purpose of describing and explaining the essence of the present invention more conveniently; interpreting them as any kind of additional limitation is against the spirit of the present invention.

Claims (4)

1. A combination meter, comprising a conventional function module and a power supply, characterized in that the combination meter also includes an anti-theft module, and the anti-theft module is connected with the engine ECU. 2 . The combination instrument according to claim 1 , wherein the anti-theft module is connected to a coil capable of reading the information of the anti-theft chip in the key. 3. The combination meter according to claim 1, wherein the anti-theft module includes a memory storing a unique code. 4. The combination instrument according to claim 3, wherein the memory storing the code of the anti-theft module is a read-only memory. the

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