CN217639996U

CN217639996U - Four-drive and two-drive switching control circuit for vehicle

Info

Publication number: CN217639996U
Application number: CN202221571885.7U
Authority: CN
Inventors: 田雷; 丁林峰; 李小龙
Original assignee: Hubei Saifu Precision Technology Co ltd
Current assignee: Hubei Saifu Precision Technology Co ltd
Priority date: 2022-06-22
Filing date: 2022-06-22
Publication date: 2022-10-21
Anticipated expiration: 2032-06-22

Abstract

The utility model discloses a four-drive and two-drive switching control circuit of a vehicle, which comprises a control chip and a power circuit, wherein the control chip is electrically connected with a control circuit of a transfer motor control circuit and a vehicle speed sensor, thereby realizing the function of controlling the transfer motor to switch four-drive and two-drive running modes of the vehicle through the transfer motor control circuit, and simultaneously, the switching time is automatically selected according to the feedback control chip of the vehicle speed sensor, thereby effectively improving the stability of the system; the utility model provides a think about different technical scheme, its technological effect can reach prior art's level, has satisfied the demand that the four two of non-road operation vehicle drive the switching control.

Description

Four-drive and two-drive switching control circuit for vehicle

Technical Field

The utility model relates to a vehicle operation control technical field especially relates to a four two drive switching control circuits of vehicle.

Background

At present, the driving modes of the vehicle are four-wheel drive and two-wheel drive, different driving modes are switched to adapt to different running roads, the switching mode is completed by controlling a transfer motor to drive a transfer case arranged on a gearbox through a transfer motor control computer, a control program of a transfer motor controller complete vehicle factory configuration cannot be modified, and the requirement of four-wheel drive and two-wheel drive switching of the non-road vehicle cannot be met due to the fact that the design aiming at the non-road vehicle is not available.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a four two drive switching control circuit of vehicle to the transfer machine controller who provides in solving above-mentioned background art can't satisfy the problem that four two drive the demand of switching of non-road vehicle.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a four two drive switching control circuit of vehicle, includes control chip, transfer motor control circuit and power supply circuit, the last electricity of control chip is connected with change over switch and speed of a motor vehicle sensor, power supply circuit and transfer motor control circuit's input and vehicle mounted power electricity are connected, power supply circuit's output and control chip electricity are connected, transfer motor control circuit's output electricity is connected with the transfer motor, transfer motor control circuit's messenger's enable control end and steering control end are connected with the control chip electricity, transfer motor's feedback end and control chip's gear feedback end electricity are connected.

Furthermore, the power supply circuit is a voltage reduction circuit which takes a switching power supply chip U1 as a core, the input end of the switching power supply chip U1 is electrically connected with the vehicle-mounted power supply, the output end of the switching power supply chip U1 is electrically connected with a linear voltage stabilization chip U2, and the output end of the linear voltage stabilization chip U2 is electrically connected with the control chip.

Furthermore, transfer motor control circuit includes step-down circuit, relay KA and triode switch circuit Q1 that use step-down steady voltage chip U3 as the core, step-down circuit's input and vehicle mounted power electricity are connected, step-down circuit's enable control end is connected with the control chip electricity, relay KA's two sets of change over contact's public end difference electricity is connected with step-down circuit's output and zero level position, relay KA's two sets of change over contact's normally closed contact and normally open contact are connected with transfer motor's two power end electricity after parallelly connected respectively, relay KA's coil one end is connected with step-down circuit's output electricity, and the other end is connected with triode switch circuit Q1's collecting electrode electricity, control chip is connected with triode switch circuit Q1's base electricity, triode switch circuit Q1's projecting pole is connected with zero level position electricity.

Furthermore, the transfer motor control circuit comprises two voltage reduction circuits, and the input ends and the output ends of the two voltage reduction circuits are connected in parallel.

Furthermore, the control chip is electrically connected with an AD sampling circuit and a communication circuit, and the power circuit provides power for the communication circuit.

Furthermore, the communication circuit is an RS485 communication circuit.

The beneficial effects of the utility model are that:

the utility model discloses a setting includes control chip and power supply circuit, and the last electricity of control chip is connected with the control circuit of transfer motor control circuit and speed sensor, has realized through the function that transfer motor control circuit control transfer motor switches over the four two drive operation modes of vehicle, simultaneously according to the automatic selection of the feedback control chip of speed sensor switch over opportunity, the effectual stability that improves the system; the utility model provides a think about different technical scheme, its technological effect can reach prior art's level, has satisfied the demand that four two drive switching control of non-road operation vehicle.

Drawings

Fig. 1 is the utility model provides a four two system's schematic diagrams that drive the switching control circuit of vehicle.

Fig. 2 is the utility model provides a power supply circuit's of vehicle four two drive switching control circuit's schematic diagram.

Fig. 3 is the utility model provides a four two transfer motor control circuit schematic diagrams that drive the switching control circuit of vehicle.

Fig. 4 is a schematic diagram of a communication circuit of a vehicle four-drive and two-drive switching control circuit according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Example 1

Referring to fig. 1, the utility model provides a technical scheme: a four-drive and two-drive switching control circuit of a vehicle comprises a control chip 1 and a power circuit 2, wherein a transfer motor control circuit 3, a vehicle speed sensor 4, an AD sampling circuit 5, a communication circuit 6 and a change-over switch 7 are electrically connected to the control chip 1, the power circuit 2 provides 6V working power for the control chip 1 and the communication circuit, the control chip 1 collects engine operation data through the AD sampling circuit 5, the control chip 1 interrupts operation after the engine operates abnormally, the control chip 1 communicates with the outside through the communication circuit 6, an enabling control end and a steering control end of the transfer motor control circuit 3 are electrically connected with the control chip 1, an output end of the transfer motor control circuit 3 is electrically connected with a power end of a transfer motor 8, the control chip 1 is electrically connected with a feedback transfer end of the transfer motor 8, the transfer motor 8 is installed on a transfer case assembly of the vehicle, 4 passive contacts containing 1 public end are installed on the transfer motor 8, and the passive contacts on the transfer motor 8 are closed and fed back to the control chip 1 when the transfer motor 8 is at different angles.

When the change-over switch 7 is switched off, the control chip 1 determines the angle of the transfer motor 8 according to a feedback signal of the transfer motor, and if the transfer motor 8 is in a second driving gear, the state is kept; if the transfer motor 8 is in the four-drive gear, the control chip 1 controls the transfer motor 8 to rotate reversely through the transfer motor control circuit 3, so that the transfer motor 8 returns to the two-drive gear.

When the changeover switch 7 is closed, the vehicle speed sensor 4 feeds back the running speed of the vehicle to the control chip 1. If the vehicle speed is greater than the break point, the control chip 1 keeps the transfer motor 8 at a second drive gear through the transfer motor control circuit 3, and if the vehicle speed is less than the break point, the control chip 1 keeps the transfer motor 8 at a fourth drive gear through the transfer motor control circuit 3.

Referring to fig. 2, the power circuit 2 is a voltage reduction circuit with a switching power chip U1 (MP 2451) as a core, an input end of the switching power chip U1 is connected to a vehicle-mounted power supply, an output end of the switching power chip U1 is electrically connected to a linear voltage stabilization chip U2 (ME 6209a 50), so that an output voltage of the power circuit 2 is stabilized to 5V, and an output end of the linear voltage stabilization chip U2 is electrically connected to the control chip 1.

Referring to fig. 3, the transfer motor control circuit 3 includes a step-down circuit with a step-down voltage stabilization chip U3 (LMR 14050) as a core, the input end and the output end of the two step-down voltage stabilization chips U3 are connected in parallel, the overload resistance of the transfer motor control circuit 3 is improved, the input end of the step-down voltage stabilization chip U3 is connected with the vehicle-mounted power supply, the enable end of the transfer motor control circuit 3 is connected with the control chip 1, the output end of the transfer motor control circuit 3 is electrically connected with the relay KA, the common ends of the two sets of switching contacts of the relay KA are respectively electrically connected with the output end zero level of the transfer step-down circuit, the normally closed contacts and the normally open contacts of the two sets of switching contacts of the relay KA are respectively connected in parallel and then connected with the two power ends of the transfer motor 8, one end of the coil of the relay KA is electrically connected with the output end of the transfer motor control circuit 3, the other end is connected with the collector of the triode switch circuit Q1, the control chip 1 is electrically connected with the base of the triode switch circuit Q1, the emitter of the triode switch circuit Q1 is electrically connected, thereby the input end of the transfer motor 8 is rotated in different directions.

Referring to fig. 4, the communication circuit 6 is a 485 communication circuit having a core of the communication chip U4 (SPX 485).

Above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the design of the present invention, equivalent replacement or change should be covered within the protection scope of the present invention.

Claims

1. A four-drive and two-drive switching control circuit of a vehicle comprises a control chip, a transfer motor control circuit and a power supply circuit, and is characterized in that: the control chip is electrically connected with a change-over switch and a vehicle speed sensor, the input end of the power circuit and the input end of the transfer motor control circuit are electrically connected with a vehicle-mounted power supply, the output end of the power circuit is electrically connected with the control chip, the output end of the transfer motor control circuit is electrically connected with a transfer motor, the enabling control end and the steering control end of the transfer motor control circuit are electrically connected with the control chip, and the feedback end of the transfer motor is electrically connected with the gear feedback end of the control chip.

2. A four-two drive switching control circuit for a vehicle according to claim 1, wherein: the power supply circuit is a voltage reduction circuit taking a switching power supply chip U1 as a core, the input end of the switching power supply chip U1 is electrically connected with the vehicle-mounted power supply, the output end of the switching power supply chip U1 is electrically connected with a linear voltage stabilization chip U2, and the output end of the linear voltage stabilization chip U2 is electrically connected with the control chip.

3. A four-two drive switching control circuit for a vehicle according to claim 1, wherein: the transfer motor control circuit comprises a voltage reduction circuit, a relay KA and a triode switch circuit Q1, wherein the voltage reduction circuit is provided with a voltage reduction and stabilization chip U3 as a core, the input end of the voltage reduction circuit is electrically connected with a vehicle-mounted power supply, the enabling control end of the voltage reduction circuit is electrically connected with the control chip, the public ends of two sets of conversion contacts of the relay KA are respectively and electrically connected with the output end and the zero level position of the voltage reduction circuit, the normally closed contacts and the normally open contacts of the two sets of conversion contacts of the relay KA are respectively and electrically connected with two power supply ends of the transfer motor after being connected in parallel, one end of a coil of the relay KA is electrically connected with the output end of the voltage reduction circuit, the other end of the coil of the relay KA is electrically connected with the collector electrode of the triode switch circuit Q1, the control chip is electrically connected with the base electrode of the triode switch circuit Q1, and the emitting electrode of the triode switch circuit Q1 is electrically connected with the zero level position.

4. A four-two drive switching control circuit for a vehicle according to claim 3, wherein: the transfer motor control circuit comprises two voltage reduction circuits, and the input ends and the output ends of the two voltage reduction circuits are connected in parallel.

5. A vehicle four-two drive switching control circuit according to any one of claims 1 to 4, characterized in that: the control chip is electrically connected with an AD sampling circuit and a communication circuit, and the power circuit provides power for the communication circuit.

6. A four-two drive switching control circuit for a vehicle according to claim 5, wherein: the communication circuit is an RS485 communication circuit.