Detection device for Battery

Field of the Invention:

This invention relates to detection of no battery condition and more particularly for 2 wheelers.

Background of the Invention:
In existing two wheelers, charging system is designed to perform even under no battery condition. Digital instrument clusters used in this condition are not able to detect the no battery condition in the vehicle.
Typically in this kind of a situation, the trip meter value updates are done at the end of the ignition i.e, during ignition switch off condition. This is done to minimise the nos. of EEPROM read-write cycles in the microcontroller. Minimization of numbers of read write cycles in EEPROM is required to stretch the use of EEPROM for many days. Trip meters used in this condition are not recording the actual distance covered by the vehicle for the given trip. During ignition switch off supply voltage to the system goes-off very quickly during no battery condition and hence system is not able to record the trip distance in the memory of digital instrument cluster and does not give the correct reading in the trip meter.

Therefore, the present invention finds a solution to the above problem by providing a detection device for battery condition. Summary of the Invention:

The present invention provides a detection device for two wheeler which detects the no battery condition of the vehicle.

An object of the present invention is to find the time delay between the battery and ignition signals and thereby making software adjustments to make data storage. Another object of the present invention is to reduce the frequency of data storage and thereby avoiding no. of read - write cycles in the system memory. Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description.

Brief description of the Drawing:

The present invention will become more fully understood from the detailed description given herein below and the accompanying drawings which are given by way of illustration only, and thus are not limitative of the present invention, and wherein

Figure. 1 is a conventional motorcycle.

Figure. 2 shows with battery and without battery condition according to the present invention.

Figure. 3 shows the flow chart according to the present invention.

Detail Description of the Invention:

The present invention now will be described more fully hereinafter with different embodiments. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather those embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the invention to those skilled in the art.

The present invention is illustrated with the help of a motorcycle. Referring to figure 1, a motorcycle comprises of a frame (101), front fork (102) attached to a pivot tube (201) of the vehicle frame, a front wheel (103) attached to these front forks (102), a handle bar (104) connected to the front forks (102), a fuel tank (105). attached so as to straddle an upper part of the vehicle frame, a seat (106) attached to the upper rear portion of the vehicle frame, an engine unit (107) attached to the lower front section of the vehicle frame, a swing arm (108) attached to a lower rear section of the vehicle frame, suspended by a rear shock absorber (not shown) from the vehicle frame and a rear wheel attached to a rear end of swing arm (108). The intake system of the engine comprises of a fuel air metering device such as a carburettor (109), intake duct and an air cleaner. The exhaust system of the engine comprises of exhaust pipe and a muffler. The motorcycle is also provided with a side cover for covering a side section of the vehicle frame, a seat cover for covering a rear section of the vehicle frame below the seat, a front fender (110) for covering an upper part of the front wheel (103), and a rear fender (111) for covering an upper part of the rear wheel (112). The drive from the engine (107) is transmitted from the engine to the driven wheel sprocket mounted on the rear wheel hub mounted on the rear wheel assembly.

According to the present invention and referring to figure 2, during normal operation of the vehicle with battery, an instrument clusters is provided with 2 input signals:

a. Battery &
b. Ignition

During this with battery condition, battery signal will be available even when the vehicle ignition is switched-off. Hence, battery signal will be available even before the ignition is switched-ON. In this case there is no loss of data or incorrect representation of date in the instrument cluster.

During without battery condition, there is no signal available at both battery & ignition inputs. When the vehicle is kick-started, both battery & Ignition signals will simultaneously appear and the time delay between the 2 signals is very less (<1 s).

The said logic is used to determine the vehicle with and without battery condition and similar software adjustments can be made to record the values in frequent intervals to avoid data loss.

Further referring to the flow chart in figure 3, when the ignition is OFF, the battery status is read. Based on battery status, the battery flag is set to "present" or " Absent" and then again it is checked for ignition switch ON/OFF condition. If the ignition switch is in OFF condition, it follows the loop until it finds the ON condition.

When the battery flag is set to "present" and ignition switch is ON, based on vehicle speed, the odometer values are calculated and updated at a predetermined rate A in the memory (EEPROM).

Whereas when the battery flag is set to "Absent" and ignition switch is OFF, based on vehicle speed, the odometer values are calculated and updated at a increased predetermined rate B in the memory ( EEPROM).

The invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the claims.

We Claim;
1. A detection device for two wheeler comprising:

an instrument cluster;

means for sensing battery signal for the instrument cluster;

means for sensing the ignition signal for the instrument cluster; and

means for detecting the time delay between the battery signal and ignition signal;

wherein based on battery condition the values are recorded in frequent intervals to avoid data loss.

2. A method of detecting the battery condition comprising the steps of:

reading the battery status when ignition is OFF;
Checking whether the battery is present in the vehicle;

if battery is present and ignition is switched ON, odometer values are calculated and updated at a predetermined rate A in the memory; and

if battery is absent and ignition is switched ON, odometer values are calculated and updated at a predetermined increased rate B (which is more than predetermined rate A) in the memory.

3. The detection device as claimed in claim 1 and claim 2, wherein the detection device is generally implemented for a digital instrument cluster.

4. A detection device for two wheeler as substantially shown and described in the specification.