DTSi - The twin spark thing - What the patent says part 2

Some things are crystal clear regarding the scope of the patent

  1. It is for four stroke engines (Independent claim)
  2. It is for lean air fuel mixture (Independent claim) - for more info on air fuel ratios read [1]
  3. It is for small capacity engines ( although this is not directly claimed, claimed as used in two wheelers dependent claim)
Patents are written in legal technical language popularly called patentese.
This mixture of legal and technical makes it quite difficult to grasp for first timers and slightly boring too. I will try my best to present all the patent information with minimum use of patentese.


All claim elements:



Independent claim:

An improved Internal Combustion Engine for efficient burning of lean air fuel mixture used in engines working on four stroke principle, characterized in that said Internal Combustion Engine comprising

  1. a pair of spark plugs
  2. a cylinder head
  3. a sleeve
  4. a pair of sealing means,
  5. a fixing means
  6. sleeve cap

The pair of spark plugs are fitted to the cylinder head to ignite air fuel mixture at predetermined instant;

One of the spark plugs is housed within sleeve, and that sleeve is detachably fixed to cylinder head and held in position by said fixing means,

Sealing means are provided between the cylinder head and the outer periphery of the sleeve and the sleeve cap is fitted on to sleeve.

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Dependent claims:

The pair of spark plugs are fitted opposite preferably diametrically to each other

The fixing means is a circlip or a screw.

The pair of sealing means is an O ring or an oil seal.

The sleeve cap is made of resilient material such as Nylon, PVC, rubber.

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Independent claim:

An improved Internal Combustion working on four stroke principle, characterized in that said Internal Combustion Engines

comprising of

  1. a spark plug
  2. a cylinder head
  3. a sleeve
  4. a pair of sealing means
  5. a fixing meanssleeve cap

The spark plug being housed within said sleeve and being fitted to a cylinder head on timing chain side so as to provide spark predetermined instant to ignite air fuel mixture

The sleeve detachably fixed to cylinder head and held in position by fixing means

The pair of sealing means are fitted between the cylinder head and the outer periphery of said sleeve and the said sleeve cap, made of resilient rial such as Nylon, PVC, rubber being fitted on cylinder head

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Dependent claim:

A single cylinder Internal Combustion Engine with improved combustion characteristics for use in two or three wheeled vehicles running on four stroke principle is described herein above and illustrated.


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References