Patent Application
20170002787
1. Fields of the invention
The present invention relates to a detection device for detecting the ignition voltage signal and combustion time of the engine of a vehicle.
2. Descriptions of Related Art
The conventional control device for a vehicle ignition system generally comprises a battery, a main switch electrically connected to the battery, a coil electrically connected to the main switch, a spark plug electrically connected to the coil, and a detection member which detects the revolutions of the engine and generates corresponding signals to the revolutions of the engine. By using the detection member, the ignition time of the coil is controlled so as to activate the spark plug to generate sparks in the engine to ignite the fuel to move the vehicle.
The number of the vehicle engine includes even-number cylinders or odd-number cylinders, and the engine may be in condition of start-able or non-start-able. The prevent invention is able to choose the best way to detect the ignition system of the vehicle engine according to different types of the engines.
The present invention relates to a detection device for a vehicle ignition system, and comprises a body, a ground line and a probe. The body has a first IC circuit board received therein which is electrically connected with a power source. The probe is electrically connected to the ground line and the first IC circuit board. The body has a connection hole, a power switch for activating the detection device, an activation switch, a first display unit and a second display unit. The ground line is connected with a metal part of a vehicle to form a loop. When the probe contacts the coil, the ignition voltage signal of the coil is detected and displayed on the first display unit, and the combustion time signal of the coil is detected and displayed on the second unit.
Preferably, the detection device has a diagnostic unit which has a second circuit board. The diagnostic unit further has a power switch electrically connected to the first IC circuit board, a display screen and a first I/O connection port on the outside thereof. A first connection cable unit has a first end and a second end, wherein the first end is inserted into the connection hole, and the second end is inserted into the first I/O connection port to detect the ignition voltage signal and the combustion time signal of the coil. The ignition voltage signal and the combustion time signal of the coil are sent to the diagnostic unit and displayed on the display screen. The probe and the ground line respectively perform as the positive end and the negative end to detect the voltage, the resistance and the current of a specific part of the vehicle.
The primary object of the present invention is to provide a detection device for a vehicle ignition system, and is able to detect the ignition system of the vehicle according to the number of cylinders, and the start-able status and non-start-able status of the engine.
Another object of the present invention is to provide a detection device for vehicle ignition system, wherein the detection device can be used as a multi-meter.
The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention.
Referring to
The mode selection portion 13 can be shifted left and right to activate a first mode which is the cranking mode, and a second mode which is the running mode. When the vehicle cannot be started (the non-start-able status), the first mode is chosen. On the contrary, when the vehicle can be started (start-able status), the second mode is chosen. When the first or second mode is chosen, the activation switch 14 is operated to proceed the detection steps. The first and second display units 15, 16 are two Liquid Crystal Display (LCD) screens. The power source indication light 17 is electrically connected to the power source 50 to show the low battery when flashing, and to show the power source is dead when the power source indication light 17 is not in operation.
The ground line 20 is connected with a metal part of the vehicle to form a loop. The probe 30 retractably extends from the body 10 and has a head 31 at its distal end thereof. The head 31 can be in contact with the coil, and the activation switch 14 is operated to test which coil is not in service. The ignition voltage signal of the coil is detected and displayed on the first display unit 15, and the combustion time signal of the coil 70 is detected and displayed on the second unit 16. It is noted that the display of the two signals mentioned above is shown by the boxes, the more number of the boxes is shown, the voltage is higher and the combustion time is longer. Preferably, each of the first and second display units 15, 16 includes marks on one side thereof, such as the marks beside the first display unit 15 shows the percentage, and the marks beside the second display unit 16 shows the seconds. By this marks, the maintainers know the precise operation status of the operation of the engine.
As shown in
When the engine is a single-cylinder engine which is under the non-start-able status, the first mode (the cranking mode) is chosen, and the head 31 contacts the coil 70, the activation switch 14 is operated to check the ignition voltage signal which is sent to the first display unit 15. The combustion signal cannot be detected because the engine cannot be started. By this way, each of the coils 70 can be checked.
When the engine is a single-cylinder engine which is under the start-able status, the second mode (the running mode) is chosen, and the head 31 contacts the coil 70, the activation switch 14 is operated to check the ignition voltage signal which is sent to the first display unit 15, and the combustion signal is detected and sent to the second display unit 16. By this way, each of the coils 70 can be checked. The questionable coil 70 can be found by the ignition voltage signal, and the spark plug can be checked by the detected combustion time.
When the engine is a twin-cylinder engine which is under the non-start-able status, the first mode (the cranking mode) is chosen, and the head 31 contacts one of the coils 70 of the twin-cylinder engine, the activation switch 14 is operated to check the ignition voltage signal which is sent to the first display unit 15. The steps can be repeated to check the other coil 70 of the twin-cylinder engine. The coils 70 of the twin-cylinder engine should be located at the same position for convenience of detection. The combustion signal cannot be detected because the engine cannot be started. By this way, each of the coils 70 can be checked.
When the engine is a twin-cylinder engine which is under the start-able status, the second mode (the running mode) is chosen, and the head 31 contacts one of the coils 70 of the twin-cylinder engine, the activation switch 14 is operated to check the ignition voltage signal which is sent to the first display unit 15. The steps can be repeated to check the other coil 70 of the twin-cylinder engine. The combustion signal of each cylinder is detected and sent to the second display unit 16. The coils 70 of the twin-cylinder engine should be located at the same position for convenience of detection.
As shown in
The maintainers can quickly know the conditions of the engine by operation of the two statues mentioned above, and the engine can be a single-cylinder engine or a twin-cylinder engine. By judging the ignition voltage single and the combustion time signal, the maintainers know the situation or status of the ignition system. The detection device 1 can be cooperated with a diagnostic unit 2 to show the voltage single and the combustion time signal in the form of waves so that the maintainers can be acknowledged the coil 70 of which cylinder needs to be replaced or maintained. The detection device 1 can also be used as a multi-meter to get the information of the voltage, the resistance and the current of a specific part.
While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 104210533 | Jun 2015 | TW | national |
