TWI603086B - Engine speed detection system - Google Patents

Description

Engine speed detection system

The invention relates to a speed detecting system, in particular to a detecting system for an engine speed of a locomotive.

The growing global warming situation is well known. It refers to the climate phenomenon in which the earth's atmosphere and oceans rise due to the greenhouse effect. One of the main reasons is the increase in carbon dioxide content, which is derived from industry. The carbon emissions of factories and steam locomotives are also one of the culprit.

If a car or locomotive is powered by gasoline, it will inevitably emit carbon dioxide. The higher the engine speed, the more intense the internal combustion of the engine. Although it provides the vehicle's driving power, it also emits a large amount of carbon dioxide. Similarly, when the vehicle is not traveling, the engine speed Weakening, however, carbon dioxide emissions continue to be emitted, unless the engine is stopped, that is, the flame can stop the discharge; in other words, if the steam locomotive waits at the red light, the roadside pauses or forgets to stop the fire after parking, it will continue because the engine continues Air pollution caused by operating at low speeds. Therefore, determining whether the engine is in an idle state by detecting the engine speed is one of the prerequisites for deciding whether to shut down the engine. The sensing method of the engine speed is mainly to install a crank position sensor, also known as an engine speed sensor, which is mainly composed of a magnet and a coil, and is arranged above the crankshaft driven by the piston, and when the steel wheel is rotated, corresponding The magnetic field of the crankshaft position sensor is cut, causing a sudden increase or decrease of the magnetic resistance to generate a signal, thereby calculating the rotational speed. However, the conventional engine speed sensor has a certain volume and must be installed in the vehicle. In particular, the space inside the locomotive body is quite limited, and it must be set corresponding to the steel wheel of the crankshaft, which is quite inconvenient in assembly, and the sensor may be The positional deviation may be caused by the undulation of the vehicle, thereby affecting the accuracy of the sensing.

The object of the present invention is to provide an engine speed detecting system that utilizes the speed of the engine in the vehicle to detect the engine speed to achieve accurate measurement, and can greatly reduce the occupied space of the vehicle.

Another object of the present invention is to provide an engine speed detecting system that can automatically extinguish in an idle state to prevent the engine from being idling and causing environmental pollution.

Another object of the present invention is to provide a detection system for detecting the rotational speed of an engine and transmitting the measured engine speed to a remote device for remote monitoring by the remote end.

To achieve the foregoing objective, the engine speed detecting system of the present invention is installed on a vehicle having an engine and a generator, and the generator is driven by the engine to at least supplement the battery power consumption of the vehicle. The measuring system includes: a detecting unit electrically connected to the generator, the detecting unit is configured to detect a frequency at which the generator generates a voltage; and a processing unit is coupled to the detecting unit, the processing unit Calculating a relative engine speed according to the frequency detected by the detecting unit, wherein when the frequency of the generator running is higher, corresponding to a higher engine speed, when the frequency of the generator running is lower, It corresponds to a lower engine speed.

According to another embodiment of the present invention, the detection system further includes a power-off control component electrically connected to the battery and the processing unit. When the engine speed is idle and continues for more than one duration, the processing is performed. The unit activates the power down control element to shut off power to the battery to extinguish the engine.

According to another embodiment of the present invention, the detection system further includes a wireless transmission module electrically connected to the processing unit, configured to transmit the engine speed to a remote electronic device for the remote electronic device Monitor the engine speed status of the vehicle.

The engine speed detection system of the invention utilizes the characteristics of the generator driven by the engine, and further detects the relative engine speed by detecting the frequency of the voltage generated by the generator operation, effectively overcoming the excessive space occupied by the traditional engine speed sensor occupying the engine room. And it is easy to be affected by the vibration of the vehicle, which affects the measurement accuracy. In addition, the detection system of the present invention can be turned off by the power-off control element to cut off the power supply under the idle state, avoiding air pollution, and transmitting through the wireless transmission mode. The group can transmit the engine speed to the remote electronic device for remote correction control, not only to monitor the engine speed, but also to remind the user that the vehicle is in an idle state.

The engine speed detecting system 1 of the present invention is mounted on a vehicle having an engine 51 and a generator 52 (as shown in the first figure). The generator 52 is driven by an engine 51, which is at least used to supplement the power consumed by the battery 54 of the vehicle. The vehicle 5 can be a car or a locomotive (as shown in the fourth figure). The detection system 1 of the present invention is based on a locomotive. Specific implementation. The general locomotive, especially the speed locomotive, operates in the following mode: the key is pressed and the start button is pressed. At this time, the starter motor drives the engine 51 to rotate, and when the key is turned on, the capacitor discharge ignition system (CDI) is also powered. When the engine 51 starts to rotate, high-voltage power is supplied to the spark plug, and the gasoline in the cylinder is ignited, so that the engine 51 continues to operate, and after the engine 51 is operated, the generator 52 is driven to generate electricity to supplement the power lost by the battery 54 and provide The power of other equipment. The generator 52 is a three-phase generator and includes a full-wave rectifier 53, especially a three-phase bridge full-wave rectifier. Specifically, the generator 52 is driven, compressed, exploded, and exhausted by internal cylinders of the engine 51. The process of generating a torque by the gas or the like pushes the generator 52. In other words, the process in which the engine 51 operates once drives the generator 52 once, and its operation generates a voltage and supplements the power consumed by the battery 54, so that the cycle maintains the normal operation of the vehicle 5. .

Please refer to the first figure for a functional block diagram of the engine speed detecting system 1 of the present invention. The engine speed detecting system 1 of the present invention includes a detecting unit 11, a processing unit 12 and a power-off control element 2. The detecting unit 11 is electrically connected to the generator 52 for detecting the frequency of the voltage generated by the generator 52, wherein the frequency of the voltage generated by the generator 52 is corrected by the full-wave rectifier 53, and the current is output to the battery 54. The detecting unit 11 detects the voltage output by the generator 52 and records the frequency at which the generator 52 generates a voltage. The processing unit 12 is an integrated circuit coupled to the detecting unit 11. The processing unit 12 calculates a relative engine speed according to the frequency detected by the detecting unit 11. In a specific implementation, when the detection unit 11 detects a frequency of 30 hz, the corresponding engine speed can be calculated according to the existing formula to be 1800 RPM. If the frequency is 100hz, the corresponding engine speed is 6000RPM; in other words, when the frequency of the generator 52 is higher, corresponding to a higher engine speed, when the frequency of the generator 52 is lower, the lower one corresponds to a lower one. Engine speed.

The detection system 1 of the present invention further defines an idle state of the engine speed, that is, when the frequency of operation of the generator 52 does not exceed a predetermined threshold range within a unit time, the engine speed is defined as an idle state. In a preferred implementation, the threshold range is defined as 2000 RPM, and the unit time can be defined as 3 minutes, that is, when the engine speed is lower than 2000 RPM and continues for 3 minutes, the idle state is entered. Please refer to the second figure for the flow chart of the detection system 1 of the present invention for an engine idling, the detection system 1 further includes a power-off control component 2 electrically connected to the battery 54 and the processing unit 12, the detection The forced extinguishing of the vehicle 1 by the system 1 includes the following steps: Step S1: The detecting system 1 detects the engine speed through the generator 52; Step S2: The engine speed does not exceed the predetermined threshold range; Step S3: The engine speed enters the idle state Step S4: the idle state continues for more than one duration; step S5: the processing unit 12 activates the power-off control element 2 for automatically cutting off the power supply of the battery 54, causing the engine 51 to be turned off, wherein the duration is defined as 5 minutes, However, it is not limited to this. Therefore, the engine can automatically cut off the power supply and extinguishing by the power-off control component 2 in the idle state of the low-speed, in addition to avoiding the environmental pollution caused by the continuous emission of carbon dioxide in the idle state of the vehicle, and reducing the unnecessary waste of fuel in the vehicle. In addition, the vehicle 5 further has a display module 55 electrically connected to the processing unit 12 for displaying the engine speed and the idle state, wherein the idle state displayed by the display module 55 includes the duration of the idle state, so that the knight or The driver can clearly know the current engine speed and idle duration.

Specifically, the detection system 1 of the present invention further includes a wireless transmission module 3 electrically connected to the processing unit 12 for receiving the engine speed calculated by the detection system 1 and transmitting the wireless communication technology. For example, the Bluetooth is transmitted to a remote electronic device 4 for the remote electronic device 4 to monitor the engine speed state of the vehicle 5, which may be a smart phone or a tablet or the like. In a specific implementation, the wireless transmission module 3 synchronously receives the value of the engine speed and transmits the received engine speed to the remote electronic device 4, and the user can set the idle state through the control program of the remote electronic device 4. The duration, or the unit time and the predetermined threshold range defined as the idle state, or forced to be extinguished by the remote end through the detection system 1. In another implementation, when the vehicle 5 is in an idle state, the processing unit 12 can also generate a short message and send it to the remote electronic device 4 by the wireless transmission module 3 to prompt the user that the vehicle 5 is currently in an idle state. And inform the user that the detection system 1 is about to take measures to turn off the power.

Referring to the fourth figure, the detection system 1 of the present invention can also be applied to a vehicle 5 (ie, a locomotive) that uses induction to activate. The vehicle 5 is provided with an inductive key base 56, which can communicate with wireless communication technologies, such as wireless frequency identification. (RFID) for sensing and sensing the inductive key (such as a smart phone or an electronic card) to activate or deactivate the vehicle 5. However, the use of the induction-activated locomotive can eliminate the inconvenience of inserting and removing the rotating key when carrying the physical key, but it is easy to forget the flame-out because the key insertion and removal is not required; therefore, the detection system 1 of the present invention can automatically detect Whether the vehicle 5 is in an idle state, and can be forced to power off and extinguish, to avoid air pollution caused by the engine not being extinguished, and even the problem of the vehicle 5 being stolen.

In summary, the engine speed detecting system 1 of the present invention utilizes the characteristics of the generator 52 driven by the engine 51, and further detects the relative engine speed by detecting the frequency of the voltage generated by the generator 52, thereby effectively overcoming the conventional engine. The speed sensor occupies too much space in the engine room, and is easily affected by the vibration of the vehicle, which affects the measurement accuracy. In addition, the detection system 1 of the present invention can be turned off by the power-off control element 2 to cut off the power supply under the idle state. To avoid air pollution, and through the wireless transmission module 3, the engine speed can be transmitted to the remote electronic device 4 for remote correction control, which not only can monitor the engine speed, but also can prompt the user that the vehicle is in an idle state.

The above detailed description is intended to be illustrative of a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and other equivalents and modifications may be made without departing from the spirit of the invention. Changes are intended to be included in the scope of the patents covered by the present invention.

1‧‧‧Detection system

11‧‧‧Detection unit

12‧‧‧Processing unit

2‧‧‧Power-off control components

3‧‧‧Wireless transmission module

4‧‧‧Remote electronic equipment

5‧‧‧ Vehicles

51‧‧‧ Engine

52‧‧‧Generator

53‧‧‧Full-wave rectifier

54‧‧‧Battery

55‧‧‧Display module

56‧‧‧Induction key holder

The first figure is a functional block diagram of the engine speed detecting system of the present invention. The second figure is a flow chart of the detection system of the present invention for an engine idling. The third figure is a functional block diagram of the transmission speed of the detection system of the present invention. The fourth figure is a schematic view of the detection system of the present invention installed on a locomotive.

1‧‧‧Detection system

11‧‧‧Detection unit

12‧‧‧Processing unit

2‧‧‧Power-off control components

51‧‧‧ Engine

52‧‧‧Generator

53‧‧‧Full-wave rectifier

54‧‧‧Battery

Claims (5)

An engine speed detecting system is installed on a vehicle having an engine and a generator. The generator is driven by the engine to at least supplement the battery power consumption of the vehicle. The detection system includes: The detecting unit is electrically connected to the generator, and the detecting unit is configured to detect a frequency at which the generator generates a voltage; and a processing unit is coupled to the detecting unit, and the processing unit is configured to The frequency detected by the detecting unit calculates a relative engine speed, wherein the higher the frequency of the generator operation, the higher the engine speed, and the lower the frequency of the generator operation, the corresponding one Low engine speed; wherein the engine speed is defined as an idle state when the frequency of operation of the generator does not exceed a predetermined threshold range within a unit time. The detection system of the engine speed according to the first aspect of the invention, wherein the detection system further comprises a power-off control component electrically connected to the battery and the processing unit, when the engine speed is idle, and For a duration of more than one duration, the processing unit activates the power down control element to shut off power to the battery to extinguish the engine. The engine speed detection system of claim 1, wherein the vehicle further has a display module for displaying the engine speed and the idle state, the idle state including a duration of the idle state. The detection system of the engine speed described in claim 1 further includes a wireless transmission module electrically connected to the processing unit, configured to transmit the engine speed to a remote electronic device for the remote The end electronics monitors the engine speed state of the vehicle. The engine speed detecting system of claim 1, wherein the generator is a three-phase generator comprising a full-wave rectifier.