Gasoline pump overheating protection device

Abstract

A gasoline pump overheating protection device is composed of a disc type permanent magnet and a Hall sensor, the disc type permanent magnet is fixed to a motor shaft of a gasoline pump and located between a commutator and a motor bearing, the Hall sensor is embedded in a gasoline pump shell 1, the Hall sensor is connected with an automobile computer ECU, and the Hall sensor is fixedly connected to the radial direction of the disc type permanent magnet; the gasoline pump has the beneficial effects that the gasoline pump is simple in structure, convenient to manufacture, low in cost and high in practicability and is improved on the basis of an existing gasoline pump, rotating speed information of the gasoline pump motor is detected through the Hall sensor, stopping of a gasoline pump motor power source is controlled through the automobile computer, and meanwhile sound-light alarm is given out to remind a driver of stopping of the gasoline pump; damage of the gasoline pump caused by overheating is prevented, and the service life of the gasoline pump is prolonged.

Description

Technical Field

[0001] The invention relates to a protective device for a gasoline pump, in particular to an overheating protective device for a gasoline pump suitable for a fuel vehicle. Background Art

[0002] As we all know, when the oil level in the fuel tank of a car is lower than the set alarm oil level during driving, the car will send out a signal to remind you to refuel, that is, the oil light on the car dashboard will flash. This situation does not mean that the car cannot drive normally, but it notifies the driver that the car's oil pump will be overloaded at this time. However, due to various reasons, the driver will not refuel immediately and will continue to drive the car. In this state, if the car is driving smoothly during driving, it can indeed travel a certain distance. However, if the car is bumpy due to factors such as the driver's driving skills or road conditions, or the car is driving on uphill or downhill sections, the oil will overflow. The oil pump will be emptied at this time, that is, the oil pump sometimes empties and sometimes supplies oil. When the oil pump is emptied, 1. the oil pump will cause the motor to accelerate due to insufficient oil supply, and the motor speed will fluctuate; 2. due to the evacuation, the oil pump cannot dissipate heat in time; the two effects cause the temperature of the oil pump to rise rapidly. If this phenomenon occurs frequently, it will cause damage to the oil pump and shorten its service life. In addition, the evacuation of the oil pump will increase the burden on the engine, which is not conducive to the operation of the engine. Therefore, it is necessary to study and design a gasoline pump overheating protection device. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a gasoline pump overheat protection device. When the gasoline pump sometimes evacuates and sometimes supplies fuel, the Hall sensor sends information about the gasoline pump motor's speed that is detected to be high and low to the vehicle computer. The vehicle computer temporarily cuts off the power supply to the gasoline pump motor and stops the gasoline pump from working. After the engine is turned off, the power supply to the gasoline pump motor is restored.

[0004] The present invention is achieved through the following technical solutions: A gasoline pump overheat protection device consists of a disc permanent magnet and a Hall sensor. The disc permanent magnet is fixed on the gasoline pump motor shaft and is located between the commutator and the motor bearing. The Hall sensor is embedded in the gasoline pump housing. The Hall sensor is connected to the automobile computer ECU, and the Hall sensor 3 is fixedly connected to the radial direction of the disc permanent magnet.

[0005] Furthermore, the Hall sensor transmits the gasoline pump motor speed information to the car computer ECU. After analysis and judgment, the car computer ECU temporarily cuts off the gasoline pump motor power supply, and simultaneously sends out an audible and visual alarm to stop the gasoline pump from working. After the engine is turned off, the car pump power supply is immediately restored.

[0006] After adopting the above structure, when the speed of the gasoline pump motor fluctuates, the Hall sensor will transmit the detected speed information to the car computer. The car computer temporarily cuts off the power supply of the gasoline pump and stops the gasoline pump from working to prevent the gasoline pump temperature from rising rapidly, thereby protecting the gasoline pump from damage due to overheating. Beneficial Effects

[0007] The beneficial effects of the present invention are: simple structure, easy production, low cost, and strong practicality. It is improved on the basis of the existing gasoline pump, detects the speed information of the gasoline pump motor through the Hall sensor, controls the stop of the power supply of the gasoline pump motor through the car computer, and sends out sound and light alarms at the same time to remind the driver to stop the gasoline pump, prevent the gasoline pump from being damaged due to overheating, and extend the service life of the gasoline pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a cross-sectional view of the present invention.

[0009] Explanation of the reference numerals: 1. gasoline pump housing, 2. disc permanent magnet, 3. Hall sensor, 4. gasoline pump motor shaft, 5. commutator, 6. brush, 7. motor bearing. DETAILED DESCRIPTION

[0010] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0011] The control method of the present invention is automatic control through a single-chip microcomputer control system. The control circuit of the single-chip microcomputer control system can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field, so the present invention will not explain the control method and circuit connection in detail.

[0012] See also Figure 1 , the present invention provides a technical solution: A gasoline pump overheat protection device is composed of a disc permanent magnet 2 and a Hall sensor 3. The disc permanent magnet 2 is fixed on the gasoline pump motor shaft 4 and is located between the commutator 5 and the motor bearing 7. The Hall sensor 3 is embedded in the gasoline pump housing 1. The Hall sensor 3 is connected to the automobile computer ECU and is fixed to the radial direction of the disc permanent magnet 2.

[0013] As a preferred solution, further, the Hall sensor 3 transmits the gasoline pump motor speed information to the car computer ECU. After analysis and judgment, the car computer ECU temporarily cuts off the gasoline pump motor power supply, and at the same time sends out an audible and visual alarm to stop the gasoline pump from working, and immediately restores the car pump power supply after the engine is turned off.

[0014] Working principle: During the driving process, when the oil level in the fuel tank reaches the set alarm oil level value, that is, when the oil light comes on, if the driver does not refuel immediately and continues to drive, when the car is bumpy, or when driving uphill or downhill, the fuel in the tank will surge, causing the gasoline pump to be emptied, resulting in the gasoline pump motor speed fluctuating. At this time, the Hall sensor 3 transmits the detected gasoline pump motor speed information to the car computer, and the car computer temporarily cuts off the gasoline pump motor power supply, and at the same time issues an audible and visual alarm to stop the gasoline pump from working, reminding the driver that the gasoline pump has stopped working, preventing the gasoline pump temperature from rising rapidly and causing damage due to overheating, forcing the driver to drive steadily and refuel immediately! The gasoline pump stops working, and when the car is stable or parked by the side of the road, and the engine is turned off (or the driver turns off the engine actively), the car computer ECU immediately restores the power supply to the gasoline pump motor.

[0015] In a specific application, the ECU issues an audible and visual alarm to stop the gasoline pump, which can be implemented by adding a gasoline pump stop warning light and an audible alarm device to the existing automobile dashboard, but is not limited to this.

[0016] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A gasoline pump overheat protection device, comprising a disk permanent magnet (2) and a Hall sensor (3), characterized in that: The disk-type permanent magnet (2) is fixed on the gasoline pump motor shaft (4) and is located between the commutator (5) and the motor bearing (7). A Hall sensor (3) is embedded in the gasoline pump housing (1). The Hall sensor (3) is connected to the automobile computer ECU, and the Hall sensor (3) is fixedly connected to the radial direction of the disk-type permanent magnet (2).

2. A gasoline pump overheat protection device according to claim 1, characterized in that: The Hall sensor (3) transmits the gasoline pump motor speed information to the automobile computer ECU. After analysis and judgment, the automobile computer ECU temporarily cuts off the gasoline pump motor power supply and simultaneously issues an audible and visual alarm to stop the gasoline pump from working. After the engine is turned off, the automobile pump power supply is immediately restored.

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