FIELD OF THE INVENTION
This invention is a suppressor cap assembly with a provision for easy removal with no harm to the surrounding parts or connected parts in a vehicle with internal combustion engine, especially in a scooter type vehicle.
BACKGROUND
In vehicles which are equipped with an internal combustion engine with spark ignition, a spark plug is a frequently serviceable component. Conventionally, the spark plug is powered by an ignition coil through a suppressor cap. The suppressor cap has a resistor to limit the spark current and thereby suppress the radio frequency (RF) interference. Some suppressor cap designs also have the ground shielding in order to act as a Faraday’s cage and suppress the RF noise. In two-wheelers with full fairing, removal of style panels for accessing the suppressor cap becomes a tedious task. So conventionally, full fairing layouts are designed in such a way to give at least a hand reaching accessibility for removing the suppressor cap. With this accessibility, service mechanics manages to pull out the suppressor cap. The suppressor cap is connected with a threaded terminal of the spark plug. Since accessibility is insufficient, removal of suppressor cap damages the spark plug. The threaded terminal of the spark plug gets bent if the suppressor cap is removed at an incorrect angle. The bent threaded terminal of the spark plug will lead to a slack connection between suppressor cap and spark plug and can lead to engine misfiring resulting in vehicle jerks.
DISCUSSION OF THE PRIOR ART
US 7019448 B2 titled “Spark plug having a multi-tiered center wire assembly” discloses “a spark plug center wire assembly having a noise suppressing conductive seal with an advanced isolation of the seal from the heat produced at the firing end of the spark plug. The center wire assembly consists of a firing electrode, a conductive glass seal, an intermediate electrode, the noise suppressing glass seal, and a terminal electrode. By detecting the firing electrode, conductive seal and intermediate electrode between the noise suppressing seal and the spark

gap, the center wire assembly can utilize the noise suppression characteristics of the suppressive seal, while isolating the seal from the high temperatures created during the combustion process. A method of manufacturing the same is also disclosed in which two glass seals are formed by sequential firing operations.”(Sic.US Publication No. 7019448B2)
US 20090050123 A1 titled “Spark plug for an internal combustion engine” discloses “a spark plug for an internal combustion engine of a motor vehicle; the spark plug is embodied with a common necessary long shape and includes an necessarily capacitive lower part consisting two coaxial electrodes, one of which is a central electrode, and the other a threaded shell for screwing in the spark plug on the engine; and an essentially inductive upper part with a plurality of coils wound around a coaxial mandrel, an envelope, and an insulator injected between the envelope and the winding. The essentially capacitive part and the essentially inductive part are mechanically interconnected as to enable communication of a clamping couple applied to the envelope to the essentially capacitive lower part. The mandrel can be elastically deformed as to compensate effects of dilation of the insulator” (Sic.US Publication No. 20090050123A1).
The United States lapsed patent No. US6434816 titled “Method of attaching a plug cap to a spark plug” discloses a suppressor cap with angled grooves at the terminal mating portion to aid in easy removal.
But even with such a design, it is difficult to ensure that the service mechanic will pull the suppressor cap at the correct angle. Suppressor cap design to enable the service mechanic to pull out the suppressor cap at the correct angle will be beneficial.
SUMMARY OF THE INVENTION
The present invention is a suppressor cap assembly comprising two sections interconnecting at an angle, housing a resistor for limiting a spark current. The first section has a provision for electrically connecting a high voltage cable of an ignition coil and the second section has a provision for electrically connecting a

threaded terminal of a spark plug, characterized in that a provision for holding the suppressor cap assembly is provided along the axis of the threaded terminal for easy removal of the suppressor cap assembly from the spark plug.
A suppressor cap assembly for a two-wheeled vehicle with an ease of removal from a spark plug during maintenance without damage to components, said suppressor cap assembly comprising, a holding provision, a suppressor cap electrically connected with an ignition coil, and a seal suppressor cap primary electrically connected with a threaded terminal of the spark plug. The holding provision enables removal of said suppressor cap assembly using at least one finger. The suppressor cap and the seal suppressor cap primary are cylindrical in shape and interconnected to each other at a first angle. The suppressor cap assembly includes a seal suppressor cap secondary connected to said seal suppressor cap primary, whereby junction between the seal suppressor cap primary and the spark plug is protected from entry of water and dust by the seal suppressor cap secondary. The suppressor cap assembly is connecting a high voltage cable with the spark plug through a seal HT cord, and wherein the suppressor cap assembly houses a resistor which connects the high voltage cable with the spark plug, and resistor in the range of 5kQ wire wound resistor is used for suppressing electromagnetic radio frequency noise.
Further, the holding provision consists of a handle member having either a cylindrical shape or a flat head having a disc shape, and wherein the holding provision allows to firmly hold the suppressor cap assembly and to detach its connection from threaded terminal of the spark plug during maintenance using two fingers. The holding provision includes a ring shape that enables the user to detach connection from a threaded terminal of the spark plug using at least one finger. The holding provision is presented along the same axis as the threaded terminal. Thus the suppressor cap assembly can be removed along the axis of the spark plug without causing any damage to the said threaded terminal. The holding provision is integrally moulded with the suppressor cap and seal suppressor cap primary. The holding provision is a separate part and connected with either the

suppressor cap or the seal suppressor cap primary by fastening or other connecting means, alternatively.
The system can be applied to all vehicles with internal combustion engines and is particularly beneficial for scooter type vehicles wherein the accessibility of suppressor cap is minimum.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 shows the pictorial view of a scooter type vehicle with a spark ignition engine fitted with a conventional suppressor cap.
Figure 2 shows the pictorial view of a spark ignition engine fitted with the proposed suppressor cap assembly, in accordance with the present subject matter.
Figure 3 shows the exploded view of an ignition coil and suppressor cap assembly with another embodiment of holding provision.
Figure 4(a) shows the holding provision in accordance with the embodiment of Figure 2.
Figure 4(b) depicts the holding provision in accordance with the embodiment of Figure 3.
Figure 4(c) depicts a holding provision in accordance with yet another embodiment.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Figure 1 is a scooter type two-wheeled vehicle 10 that has a swingable mounted engine 20 underneath a seat 30. Such engines are generally of spark ignition type, and a suppressor cap 40 needs to be removed for accessing a spark plug. The vehicle has a fully faired design with style panels and frame 25 covering the engine, and there is less space for accessing the suppressor cap during the maintenance. Further, the conventional suppressor cap 40 has a uniform outer surface profile and is difficult to pull out from the spark plug. There is no gripping portion to hold the suppressor cap firmly that can aid to pull out at the time of the maintenance without bending the threaded terminal of the spark plug.

Figure 2 shows the proposed novel suppressor cap assembly 50 which has a holding provision 60 the suppressor cap. In the preferred embodiment, the holding provision 60 of the suppressor cap is in the form of a handle 60 that can be gripped using at least two fingers. Figure 4 (a) depicts an enlarged view of the suppressor cap assembly 50, in accordance with the embodiment of Figure 3. The proposed suppressor cap assembly 50 has two sections, a suppressor cap 70 and seal suppressor cap primary 80 that are interconnected at an angle. In the preferred embodiment, the suppressor cap 70 and seal suppressor cap primary 80 are cylindrical in shape, and they are connected at a right angle in the depicted embodiment of Figure 3. The suppressor cap 70 and the seal suppressor cap primary 80 are connected to each other at a first angle, wherein the first angle can be an obtuse angle that is greater than 90 degrees (right angle). Also, the suppressor cap 70, the holding provision 60, and the suppressor cap primary are integrally formed in one implementation.
The suppressor cap 70 electrically connects with a high voltage cable 90 of an ignition coil 100 by means of a connector 130 and an ignition coil supply wire 140. The seal suppressor cap primary 80 electrically connects with a threaded terminal of a spark plug (not shown in the figure). A seal HT cord 110 prevents entry of water and dust into the junction between the suppressor cap 70 and the high-voltage cable 90. The junction between the seal suppressor cap primary 80 and the spark plug is protected from entry of water and dust by a seal suppressor cap secondary 120. The suppressor cap assembly 50 houses a resistor which connects the high voltage cable 90 with the spark plug. The preferred embodiment has a 5kQ wire wound resistor for suppressing the electromagnetic radio frequency noise.
Referring to Figure 3, another design of the holding provision 62 on the suppressor cap assembly 50 is shown. Figure 4(b) depicts the assembled enlarged view of the suppressor cap assembly 50 shown in Figure 3. Battery powered ignition system (Transistor controlled) is used to ignite the air-fuel mixture in the spark ignition internal combustion engine. This system detects piston position

based on pulser coil signal. Magneto used in this system is a single pip rotor. Based on the pulser coil signal, a primary winding of the ignition coil can be interrupted using an electronic switch which induces a high voltage in the secondary winding in the ignition coil 100. Using the induced high voltage, the spark plug ignites air-fuel mixture and produces power.
The holding provision 62 in the present implementation is provided with a flat head portion 62 having a disc shape. The flat head portion 62 enables a user to hold the suppressor cap assembly 50 using two fingers, and to pull said suppressor cap assembly 50 with ease, even in the vehicles with full fairing layouts.
Figure 4 (c) shows other possible designs of the holding provision 64 including a ring portion 64. The holding provision 64 allows a service mechanic to firmly hold the suppressor cap assembly 50 and detach its connection from the threaded terminal of the spark plug by using a single finger that is inserted into the ring. The holding provision 60, 62, 64 is disposed substantially at the interjection point of the suppressor cap 70 and the suppressor cap primary 80. Since the holding provision 60, 62, 64 is presented along the same axis as the threaded terminal, the suppressor cap assembly 50 can be removed along the axis of the spark plug and thus preventing damage to the threaded terminal.
The holding provision 60, 62, 64 can be integrally moulded with the sections 70 and 80. Alternatively, the holding provision 60, 62, 64 could also be a separate part and connected with either the section 70 or 80 by fastening or other connecting means. These and other embodiments are possible without departing from the spirit and scope of the invention.

WE CLAIM:
1. A suppressor cap assembly (50) for a two-wheeled vehicle with an ease of
removal from a spark plug during maintenance without damage to components, said suppressor cap assembly (50) comprising: a holding provision (60, 62, 64); a suppressor cap (70) electrically connected with an ignition coil (100);
and a seal suppressor cap primary (80) electrically connected with a threaded terminal of the spark plug, said holding provision (60, 62, 64) enables removal of said suppressor cap assembly (50) using at least one finger.
2. The suppressor cap assembly (50) of Claim 1, wherein the suppressor cap
(70) and the seal suppressor cap primary (80) are cylindrical in shape and interconnected to each other at a first angle.
3. The suppressor cap assembly (50) of Claim 1, wherein the suppressor cap
assembly (50) includes a seal suppressor cap secondary (120) connected to said seal suppressor cap primary (80), whereby junction between the seal suppressor cap primary (80) and the spark plug is protected from entry of water and dust by the seal suppressor cap secondary (120).
4. The suppressor cap assembly (50) of Claim 1, wherein said suppressor cap
assembly (50) is connecting a high voltage cable (90) with the spark plug through a seal HT cord (110), and wherein the suppressor cap assembly (50) houses a resistor which connects the high voltage cable (90) with the spark plug, and resistor in the range of 5kQ wire wound resistor is used for suppressing electromagnetic radio frequency noise.
5. The suppressor cap assembly (50) of Claim 1, wherein the holding
provision (60, 62) consists of a handle member (60) having either a cylindrical shape or a flat head (62) having a disc shape, and wherein the holding provision (60, 62) allows to firmly hold the suppressor cap assembly (50) and detach its connection from threaded terminal of the spark plug during maintenance using two fingers.

6. The suppressor cap assembly (50) of Claim 1, wherein the holding
provision (64) includes a ring shape that enables the user to detach connection from a threaded terminal of the spark plug using at least one finger.
7. The suppressor cap assembly (50) of Claim 1, wherein the holding
provision (60, 62, 64) is presented along the same axis as the threaded terminal thus the suppressor cap assembly (50) can be removed along the axis of the spark plug without causing any damage to said threaded terminal.
8. The suppressor cap assembly (50) of Claim 1, wherein the holding
provision (60) is integrally moulded with the suppressor cap (70) and seal suppressor cap primary (80).
9. The suppressor cap assembly (50) of Claim 1, wherein the holding
provision (60) is a separate part and connected with either the suppressor cap (70) or the seal suppressor cap primary (80) by fastening or other connecting means, alternatively.