Electrical Circuit for Headlamp

Field of invention:

This invention is related to "Electrical circuit for Headlamp" and more particularly related to the electrical system for headlamp in two and three wheelers.

Background:

In any known type of headlamp of two or three wheelers, under normal conditions of usage, the said headlamp is switched off in daylight condition and is switched on by the user under low illumination ambience or during night time. This is achieved by a simple switch provided on the handle bar controls and is connected between the power supply and the head lamp. The power supply can be either vehicle battery or regulator connected with the magneto of the vehicle. In the event, if the headlamp is ON during daytime which is mandatory in a few countries, the headlamp will operate at its full rated output and may result in deterioration of the reflector of the head lamp and also the switch. This is nomnally overcome by improving the material of the reflector and the switch exclusively for use in those countries. This necessitates the need for developing two separate headlamps and switches depending on country of usage which involves increase in cost and inventory. Alternately the headlamp can be made ON during day time with reduced output by providing one more output from the power supply of the system. This output will operate the headlamp at a level lower than its rated output when the switch is in OFF condition. When the switch is in ON condition the headlamp will operate at its rated output. However this arrangement also calls for additional power supply which increases the system cost and cannot be used in countries where such requirements do not exist.

Hence the objective of the invention is to provide a cost effective simple system which can be adopted or retrofitted on the existing system or vehicle which will ensure the need of headlight ON even on day time.

Summary of the invention:

The present invention describes an electrical system used for headlamp of two and three wheelers. The system includes a headlamp that is powered by a power supply. The power supply provides the AC output to the headlamp from the magneto. The headlamp in the present invention can operate at full rated power as well as at reduced power.

The headlamp system in the present invention functions in the following manner. The headlamp is connected to the power supply through a headlamp switch and a switching device where the switching device is connected in mutually parallel circuit relationship to the said headlamp switch. The switching device can be either a power diode or a MOSFET.

When the headlamp switch is in ON condition the headlamp operates at a power as obtained from the power source i.e. the rated power.

Now, again when the headlamp switch is in OFF condition the headlamp receives power through the switching device and operates at a power less than the rated power.

Moreover, the switching device is provided with connectors such that the device can be plugged in or removed from the system whenever required. This makes the system cost effective and retrofittable in two and three wheelers.

Therefore, the headlamp with the help of the switching device can operate at a reduced power enabling an economic system to cater to the mandatory requirements of headlamp being in ON condition during daytime.

Brief description of drawings:

Figure 1, illustrates a motorcycle of general type.

Figure 2, illustrates a block diagram of the electrical system of the headlamp according to the present invention.

Detailed description of drawings:

For the purpose of illustration a motorcycle of the general type is illustrated for the application.

The motorcycle includes a body frame composed of a head pipe (101), a down tube (102) extending rearwardly and downwardly from the head pipe (101) and a main tube extending rearwardly and upwardly from the down tube (102). An engine (103) supported to the main tube and the output from the engine is transmitted through a gear system to rear wheel. The said motorcycle body is covered by side covers (104) on either side. A tall lamp unit (105) is provided between the rear centre cover and the rear side cover. The vehicle body can be supported by a main stand (106) or a side stand. Further, a pillion rider step (107) projects laterally trom the main lube on each side of the motorcycle body. The motorcycle is provided with a seat (108) arranged longitudinally. A front fork (109) is rotatably supported on the head pipe (101). The upper portion of the front fork (109) for supporting front wheel (110) is connected to a head pipe (101) through a bottom bridge (111) and a top bridge (112). A front cowl (113) or fairing is mounted onto a support structure, which goes into the fork inner of front fork.
A handle bar (114) with necessary cluster of operating switches for hom, headlamp, winkers and choke are fitted on the top bridge (112) of the front fork (109) on one side and throttle operating tube fitted on other side along with another cluster of switch which consists of engine kill and headlamp control.

A headlight (115) goes into the cavity of the fairing is reslliently mounted to the brackets. Two winkers (116) are mounted onto to two brackets extended from the tube outer of the support structure.

The headlamp and winker operating switch clusters are located on either side of the handle bar (114) mounted on the top bridge (112) of the handle bar (114) to allow user to operate them ergonomically.

An embodiment of the present invention will be described with reference to Figure 2. The disclosure provides a description of the electrical system for a headlamp more particularly of two and three wheelers. Figure 2 describes the headlamp system, wherein the magneto M (shown in figure 1) is connected to the power supply D1, which provides the AC output to the said circuit. The device or headlamp D3 (115 in Figure 1) is connected to the power supply D1 through the headlamp switch D2 and switching device D4. The switching device D4 is connected in parallel to the headlamp switch D2. When the headlamp switch D2 is opened, i.e. it is in OFF position, the headlamp D3 will get power through the switching device D4 and operate at reduced power supply. The switching device can be either a power diode or a MOSFET. However, when the headlamp switch D2 is closed, i.e. it is in the ON position, the headlamp D3 will get full power from the power supply D1 and operate at full rated output. In such a state the switching device D4 will be bypassed. The said headlamp circuit is connected to the wiring harness present in the two or three wheeler. The device D3 can be headlamp or tail lamp or any kind of lightening device present in two wheelers or three wheelers.
It is further to be noted that the present invention is not limited to the described embodiment and many other changes and modifications may be made without departing from the scope of the appended claims.

We claim:

1. A electrical circuit for headlamp in two and three wheelers comprises
of:

a device D3;

a power supply D1 adopted to provide power to the device D3 which receives Input from the Magneto M;

a device switch D2 adopted to provide rated power to the device D3 when the switch D2 is in first position and adopted to provide reduced power when the switch D2 is in second position;
a switching device D4 adopted to operate the device D3 when the device switch D2 is in second position;

2. The electrical circuit for headlamp as claimed in claim 1, wherein the said device D3 comprises of a headlamp.

3. The electrical circuit for headlamp as claimed in claim 1, wherein the said switching device D4 comprises at least one of a MOSFET or a power diode.

4. The electrical circuit for headlamp as claimed in claim 1, wherein the switching device D4 is connected in mutually parallel circuit relationship to the said switch D2.

5. The electrical circuit for headlamp as claimed in claim 1, wherein the said switching device D4 terminals are connected through a coupling for providing a retrofittable system.

6. The electrical circuit for headlamp as claimed in claim 1, wherein the said switch D2 is said to be in first position when the switch D2 is closed or in ON position.

7. The electrical circuit for headlamp as claimed in claim 1, wherein the said switch D2 is said to be in second position when the switch D2 is opened or in OFF position.

8. The electrical circuit for headlamp as claimed in claim 1, wherein the said switch 02 is located on the handle bar.