Circuit with automatic return function of windscreen wiper

Abstract

The utility model relates to a circuit with a windscreen wiper self-return function, which solves the problems that the structure is complicated and the windscreen wiper cannot return when the windscreen wiper is controlled by a vehicle body controller at present. The 87 end of the windscreen wiper ON / OFF relay is connected with the return sheet a area, the 87a end of the windscreen wiper ON / OFF relay is connected with the return sheet b area, the 30 end of the windscreen wiper ON / OFF relay is connected with the 30 end of the windscreen wiper high-low speed relay, and the 86 end of the windscreen wiper ON / OFF relay is connected with the control end of the automobile body controller to control opening and closing of the windscreen wiper; an 87a end of the wiper high-low speed relay is connected with a low-speed wiring point e of the wiper motor, an 87 end of the wiper high-low speed relay is connected with a high-speed wiring point d of the wiper motor, an 86 end of the wiper high-low speed relay is connected with the other control end of the vehicle body controller, and the wiper is controlled to work at a high speed; the 85 end of the wiper ON / OFF relay, the 85 end of the wiper high and low speed relay, the grounding point f of the wiper motor and the grounding point g of the return sheet are connected with the whole vehicle ground. Through effective combination of the relay and the return piece, the automatic return function of the wiper blade in the windscreen wiper system is achieved, the principle of windscreen wiper control is simplified, and vehicle faults caused by stability of a controller are avoided.

Description

Technical Field

[0001] The utility model relates to a windshield wiper, in particular to a circuit with an automatic return function of the windshield wiper, and belongs to the field of commercial vehicles. Background Art

[0002] The wiper return function, widely used in the market, generates feedback from the wiper motor's return plate to the body controller when the wiper switch is turned off. The body controller uses this feedback signal to determine whether the wipers have returned to their original position and then controls the wiper on / off relay to activate and deactivate the wipers. However, due to the complex control structure of the body controller solution, there is a risk of failure to return to the original position. Utility Model Content

[0003] The utility model provides a circuit with automatic wiper return function, thereby solving the problem that the current solution relying on a vehicle body controller has a complex control structure and cannot return to its original position.

[0004] The utility model is realized by the following technical solutions:

[0005] A circuit with an automatic return function for wipers includes a wiper ON / OFF relay, a wiper high-speed and low-speed relay, a body controller, a wiper motor and a return plate. The KL30 power supply provided by the vehicle is connected to the wiper ON / OFF relay 87 end and the return plate area a; the wiper ON / OFF relay 87a end is connected to the return plate area b; the wiper ON / OFF relay 30 end is connected to the wiper high-speed and low-speed relay 30 end; the wiper ON / OFF relay 86 end is connected to the control end of the body controller to control the opening and closing of the wiper; the wiper high-speed and low-speed relay 87a end is connected to the wiper motor low-speed wiring point e; the wiper high-speed and low-speed relay 87 end is connected to the wiper motor high-speed wiring point d; the wiper high-speed and low-speed relay 86 end is connected to the other control end of the body controller to control the wiper to operate at high speed; the wiper ON / OFF relay 85 end, the wiper high-speed and low-speed relay 85 end, the wiper motor grounding point f, and the return plate grounding point g are connected to the vehicle ground.

[0006] The utility model realizes the automatic return function of the wiper blade in the wiper system through the effective combination of the relay and the return piece, simplifies the principle of wiper control, and avoids vehicle failure caused by controller stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is the control principle diagram of the utility model;

[0008] Figure 2 1 is a diagram showing the return piece of the wiper blade of the present invention when the wiper blade has not returned to its original position, wherein (a) is the unreturned state and (b) is the returned state. DETAILED DESCRIPTION

[0009] like Figure 1 As shown, the utility model is mainly composed of a wiper ON / OFF relay, a wiper high and low speed relay, a body controller, a wiper motor and a return plate. The specific connection method is as follows:

[0010] The KL30 power supply provided by the whole vehicle is connected to the wiper ON / OFF relay 87 end and the return plate area a; the wiper ON / OFF relay 87a end is connected to the return plate area b; the wiper ON / OFF relay 30 end is connected to the wiper high and low speed relay 30 end; the wiper ON / OFF relay 86 end is connected to the control end of the body controller to control the opening and closing of the wiper; the wiper high and low speed relay 87a end is connected to the wiper motor low speed connection point e; the wiper high and low speed relay 87 end is connected to the wiper motor high speed connection point d; the wiper high and low speed relay 86 end is connected to the other control end of the body controller, and the controller wiper works at high speed; the wiper ON / OFF relay 85 end, the wiper high and low speed relay 85 end, the wiper motor grounding point f, and the return plate grounding point g are connected to the vehicle ground.

[0011] During the wiper blade return process, when the wiper switch is turned off, the wiper ON / OFF relay is disconnected, and the return piece is not in the return state (such as Figure 2 (a), the power supply KL30 goes from point a to point b in the figure, passes through the wiper ON / OFF relay 87a, point 30, reaches the wiper high and low speed relay 30, point 87a, and finally reaches the wiper motor low speed gear, and the wiper motor continues to work. When the wiper blade is in the return state (as shown in FIG. Figure 2 (as shown in (b)).

[0012] This utility model combines two relays with a return plate. By connecting and disconnecting contacts a and b on the return plate, it achieves automatic return when the wiper switch is off. While ensuring the wiper system can return normally, this simplifies the wiper return function and improves its reliability. This utility model is used on heavy-duty vehicles to achieve a wiper return function independent of controller software control.

Claims

1. A circuit for automatic wiper return function, characterized by: It includes the wiper ON / OFF relay, wiper high and low speed relays, body controller, wiper motor and return plate. The KL30 power supply provided by the whole vehicle is connected to the wiper ON / OFF relay 87 end and the return plate area a; the wiper ON / OFF relay 87a end is connected to the return plate area b; the wiper ON / OFF relay 30 end is connected to the wiper high and low speed relay 30 end; the wiper ON / OFF relay 86 end is connected to the control end of the body controller to control the opening and closing of the wiper; the wiper high and low speed relay 87a end is connected to the wiper motor low speed wiring point e; the wiper high and low speed relay 87 end is connected to the wiper motor high speed wiring point d; the wiper high and low speed relay 86 end is connected to the other control end of the body controller, and the controller wiper works at high speed; the wiper ON / OFF relay 85 end, the wiper high and low speed relay 85 end, the wiper motor grounding point f, and the return plate grounding point g are connected to the vehicle ground.

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