CN215057853U

CN215057853U - Starting protection device

Info

Publication number: CN215057853U
Application number: CN202121191411.5U
Authority: CN
Inventors: 赵子赛; 王兆洋; 刘晓伟; 陈正虎; 袁晓桐; 董长龙
Original assignee: Hebei Huabei Diesel Engine Co Ltd
Current assignee: Hebei Huabei Diesel Engine Co Ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2021-12-07
Anticipated expiration: 2031-05-31

Abstract

The utility model discloses a start protection device relates to the protection technical field that starts, including central controller and the starting switch who links to each other with central controller, freewheel switch, generator, starter motor, speed sensor, storage battery switch, central controller contains frequency signal processing circuit, analog signal filter circuit, CAN transceiver module and starts protection control logic chip, and central controller passes through the CAN bus and links to each other with the CAN terminal. The utility model discloses realize 3 way feedback information circuits, realize emergent function of starting, improved reliability and emergent functional to engine protection greatly.

Description

Starting protection device

Technical Field

The utility model belongs to the technical field of the protection technique that starts and specifically relates to a start protection device.

Background

The starting protection device is used for preventing the starting motor from being damaged due to the fact that a driver drags the starting motor for a long time in the starting process of the diesel engine; the problem that a driver mistakenly operates to drag the starting motor to cause damage to the engine when the diesel engine normally operates is avoided, and therefore the engine is protected. The starting protection device is commonly used in a device using a diesel engine as power, and is generally realized by the following ways: the controller collects signals of the engine speed sensor, and controls the output of starting signals through logic judgment, so that the engine is protected. The existing starting protection device generally only has a single-path feedback information circuit such as a rotating speed frequency signal, and when the single-path feedback information circuit fails due to circuit and other reasons, the protection device can be disabled. The existing starting protection device generally has no starting control override switch, and cannot meet the requirement of quickly starting the engine under certain special conditions.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that needs to solve provides a start protection device realizes 3 way feedback information circuits, realizes emergent function of starting, has improved reliability and emergent functional to engine protection greatly.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

a starting protection device comprises a central controller, a starting switch, an override switch, a generator, a starting motor, a rotating speed sensor, a storage battery and a storage battery switch, wherein the starting switch, the override switch, the generator, the starting motor, the rotating speed sensor, the storage battery and the storage battery switch are connected with the central controller, the central controller comprises a frequency signal processing circuit, a voltage analog signal filter circuit, a CAN receiving and transmitting module and a starting protection control logic chip, and the central controller is connected with a CAN terminal through a CAN bus.

The utility model discloses technical scheme's further improvement lies in: the central controller is connected with the overrunning switch, the generator and the CAN terminal in sequence.

The utility model discloses technical scheme's further improvement lies in: the system also comprises a bus information display device communicated with the central controller.

Due to the adoption of the technical scheme, the utility model discloses the technological progress who gains is:

on the basis of a general diesel engine starting protection device, the system realizes a 3-path feedback information circuit by adding a path of voltage analog signal filter circuit and a CAN (controller area network) transceiver module; an input channel of an emergency switch is added, so that the emergency starting function is realized, and the reliability and the emergency functionality of engine protection are greatly improved.

The starting protection device transmits the state information of the starting protection device in real time through the CAN bus, and the information interactivity of a driving system is improved.

The problem that the protection device fails when a single-path feedback information circuit of the conventional starting protection device breaks down and the requirement of quickly starting the engine under certain special conditions are met, and the starting protection device is low in cost and reliable in operation.

The problem that the existing starting protection device cannot protect a single-path feedback information circuit from failure and cannot realize emergency under special conditions is solved.

Drawings

FIG. 1 is a schematic diagram of the present invention;

FIG. 2 is a wiring diagram of the present invention;

fig. 3 is a simple wiring diagram of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following examples:

as shown in figures 1, 2 and 3, the starting protection device comprises a central controller, a starting switch, an override switch, a generator, a starting motor, a rotating speed sensor, a storage battery switch and a bus information display device, wherein the starting switch, the override switch, the generator, the starting motor, the rotating speed sensor, the storage battery switch and the bus information display device are connected with the central controller, a starting protection control logic chip in the central controller adopts a 16-bit single-chip microcomputer chip of Freescale company, the main frequency of the chip is 0.5-50 MHz, and the chip is provided with a 256KB Flash memory, a 12KB RAM random access memory and a 4 EPROM KB memory. The frequency signal filter circuit and the analog signal filter circuit both adopt pi-type filtering to realize the anti-interference of signals. The CAN transmitting-receiving module adopts a CTM8251CAN isolation transceiver of Zhonglong corporation, the baud rate of which is 5 kps-1 Mbps, and the CAN transmitting-receiving module is completely electrically isolated. The central controller is connected with the CAN terminal through a CAN bus. The central controller is connected with the starting switch, the override switch, the CAN terminal, the storage battery switch and the storage battery in sequence and then connected with the starting motor and the generator.

The system is controlled by a starting switch, an override switch, a rotating speed sensor, a generator and a CAN bus, a starting protection control logic chip, a starting motor is used as an output signal actuator, and a 24V power supply provides power for a central controller. The generator is connected with the central controller through a voltage input channel, and an output signal is transmitted to the starting motor through a starting voltage output channel.

The CAN bus and the generator provide input signals, the starting protection control logic chip controls the starting protection control logic chip, the starting motor serves as an output signal actuator, the output signals are output through a starting voltage output channel, and the CAN bus is connected with a CAN terminal.

Description of the working principle:

1) and (4) starting protection function, namely when the overrunning switch is in an open state and the starting switch is in a closed state, the controller enters a starting protection state and simultaneously monitors the voltage of the generator, the frequency of the rotating speed sensor and a bus rotating speed message EEC1 (according to SAE J1939 protocol). When the voltage of the generator, the frequency of the rotating speed sensor and the bus rotating speed message exist at the same time, only one signal can be used as a rotating speed judgment basis.

2) An emergency start function. The central controller monitors the level of the override switch in real time after being electrified, when the override switch is closed, namely the override switch inputs a high level, the level does not change suddenly within 50ms, the central controller enters an emergency starting state, and starting protection is not performed any more.

3) Start protection device status bus information sharing

The central controller comprises a starting protection controller, after the power-on of the dynamic protection controller, the state information message of the starting protection device is transmitted through a bus, and the message content comprises the starting emergency switch state, the starting time and the like.

Claims

1. A start-up protection device characterized by: the device comprises a central controller, a starting switch, an override switch, a generator, a starting motor, a rotating speed sensor, a storage battery and a storage battery switch, wherein the starting switch, the override switch, the generator, the starting motor, the rotating speed sensor, the storage battery and the storage battery switch are connected with the central controller, the central controller comprises a frequency signal processing circuit, a voltage analog signal filtering circuit, a CAN transceiving module and a starting protection control logic chip, and the central controller is connected with a CAN terminal through a CAN bus.

2. A start protector as set forth in claim 1, wherein: the central controller is connected with the starting switch, the override switch and the CAN terminal in sequence.

3. A start protector as set forth in claim 1, wherein: the system also comprises a bus information display device communicated with the central controller.