A power take-off mistake proofing system

Abstract

The utility model relates to a kind of power take-off mistake-proof control system, solve the possible of current control system operation error, prone to cause the problem of power take-off damage. Including control system and mistake-proof system, control system is composed of power take-off switch and single electromagnetic valve, mistake-proof system includes vehicle speed sensor, body controller CBCU and four loop protection valve, single electromagnetic valve is connected between body controller CBCU and four loop protection valve, the air inlet a of single electromagnetic valve and the fourth outlet of four loop protection valve are interconnected. The utility model can prevent power take-off damage due to control error, while reducing the labor intensity of driver and improving human-machine performance.

Description

Technical Field

[0001] This utility model relates to a power take-off (PTO) error prevention and control system, which belongs to the field of commercial vehicles. Background Technology

[0002] Commercial vehicle power take-offs (PTOs) require operation when the vehicle is stationary. However, existing PTO control systems allow operation even when the vehicle speed is not zero. Such control systems are prone to operational errors, which can damage the PTO. Utility Model Content

[0003] This utility model provides a power take-off (PTO) error-proof control system, which solves the problem that current control systems may have operational errors that can easily damage the PTO.

[0004] This utility model is achieved through the following technical solution: A power take-off (PTO) error prevention control system includes a control system and an error prevention system. The control system consists of a PTO switch and a single solenoid valve. The error prevention system includes a vehicle speed sensor, a body control unit (CBCU), and a four-circuit protection valve. The single solenoid valve is connected between the body control unit (CBCU) and the four-circuit protection valve. The air inlet a of the single solenoid valve is connected to the fourth outlet of the four-circuit protection valve. When the vehicle speed is zero, the body control unit (CBCU) in the error prevention system collects the output signal of the vehicle speed sensor, controls the air passage of the individual battery valve's air inlet a and air outlet b to be open, and connects the fourth outlet of the four-circuit protection valve with the air inlet a of the individual solenoid valve, so that the control system can be operated normally. When the vehicle speed is not zero, the body control unit (CBCU) in the error prevention system collects the output signal from the vehicle speed sensor and controls the air circuit of the individual battery valve's air inlet a and air outlet b to be disconnected. The fourth outlet of the four-circuit protection valve and the air inlet a of the individual solenoid valve are not connected, and the control system cannot operate the power take-off, thus realizing the error prevention function.

[0005] This invention can prevent the power take-off unit from being damaged due to incorrect operation, while reducing the driver's workload and improving human-machine performance. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the present invention. Detailed Implementation

[0007] The purpose of this invention is to add a fault-prevention system to the original control system, which controls the opening and closing of the power take-off control air circuit and whether the vehicle speed is zero, i.e. whether the vehicle is stopped, to prevent erroneous operation.

[0008] This utility model uses a commercial vehicle chassis body controller, which determines whether the vehicle speed is zero by the vehicle speed signal, thereby controlling the air circuit opening and closing. The air circuit is closed when the vehicle speed is not zero, and the air circuit is open when the vehicle speed is zero, thus realizing the error prevention operation function.

[0009] Figure 1 This is a schematic diagram of the operating principle of this utility model. This utility model consists of an operating system 1 and a fault-prevention system 2. The operating system 1 is a system already matched on the chassis, consisting of a power take-off switch 1.1 and a single-unit solenoid valve 1.2. 1.3 is the cylinder on the power take-off component. The fault-prevention system 2 consists of a vehicle speed sensor 2.1, a body control unit (CBCU) 2.2, a single-unit solenoid valve 2.3, and a four-circuit protection valve 2.4. The vehicle speed sensor 2.1, body control unit (CBCU) 2.2, and four-circuit protection valve 2.4 are already matched on the chassis; the single-unit solenoid valve 2.3 is a newly added component.

[0010] When the vehicle speed is zero, the body controller in the error prevention system 2.2 collects the output signal of the vehicle speed sensor in 2.1 and controls the air passage of the individual battery valve inlet a and outlet b in 2.3 to be open. The fourth outlet 2.4 of the four-circuit protection valve is connected to the air inlet a of the individual solenoid valve 1.2, and the control system 1 is operated normally.

[0011] When the vehicle speed is not zero, the body controller in the error prevention system 2.2 collects the output signal of the vehicle speed sensor in 2.1 and controls the air circuit of the air inlet a and air outlet b of the individual battery valve in 2.3 to be disconnected. The fourth outlet 2.4 of the four-circuit protection valve and the air inlet a of the individual solenoid valve 1.2 are not connected. The control system 1 cannot operate the power take-off, thereby realizing the error prevention function.

[0012] This invention only requires the addition of a single solenoid valve to control the air circuit opening and closing, which can achieve the function of preventing the power take-off from being operated incorrectly when the vehicle has speed.

Claims

1. A power take-off (PTO) error-proofing control system, comprising a control system and an error-proofing system, wherein the control system consists of a PTO switch and a single-unit solenoid valve, and the error-proofing system includes a vehicle speed sensor, a vehicle control unit (CBCU), and a four-circuit protection valve, characterized in that: A single solenoid valve is connected between the body controller CBCU and the four-circuit protection valve. The air inlet a of the single solenoid valve is connected to the fourth outlet of the four-circuit protection valve. When the vehicle speed is zero, the body control unit (CBCU) in the error prevention system collects the output signal of the vehicle speed sensor, controls the air passage of the individual battery valve's air inlet a and air outlet b to be open, and connects the fourth outlet of the four-circuit protection valve with the air inlet a of the individual solenoid valve, so that the control system can be operated normally. When the vehicle speed is not zero, the body control unit (CBCU) in the error prevention system collects the output signal from the vehicle speed sensor and controls the air circuit of the individual battery valve's air inlet a and air outlet b to be disconnected. The fourth outlet of the four-circuit protection valve and the air inlet a of the individual solenoid valve are not connected, and the control system cannot operate the power take-off, thus realizing the error prevention function.

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