Internal combustion engine for gaseous fuel

An internal combustion engine for gaseous fuel, said internal combustion engine comprising a cylinder and a piston for reciprocal movement in said cylinder along a reciprocal axis, whereby a combustion chamber is at least partially delimited by said cylinder and said piston, said piston comprising a piston crown facing said combustion chamber, a piston crown projection of said piston crown in a direction parallel to said reciprocal axis and onto a piston crown plane extending transversally to said reciprocal axis having a piston crown centre point, said piston crown comprising a piston bowl surface, defining a piston bowl, and a piston rim portion, wherein said piston rim portion encloses said piston bowl surface and a piston bowl opening is the intersection between said piston rim portion and said piston bowl surface, said piston bowl opening having an opening centre of gravity in said piston crown plane, said opening centre of gravity being offset from said piston crown centre point, wherein a first separating plane extends in a first direction as well as in a direction parallel to said reciprocal axis and intersects said piston crown centre point as well as said opening centre of gravity, wherein a second separating plane extends in a second direction transversal to said first direction as well as in a direction parallel to said reciprocal axis and intersects said opening centre of gravity, said piston bowl surface having two halves:

• a proximal piston bowl surface half and a distal piston bowl surface half, said piston bowl surface halves being separated by said second separating plane, wherein said proximal piston bowl surface half is located on the same side of said second separating plane as said piston crown centre point, said internal combustion engine further comprising a spark plug adapted to produce a spark in said combustion chamber, said internal combustion engine further comprising a fuel injector for injecting gaseous fuel into said combustion chamber such that, during operation of said internal combustion engine, a majority of fuel discharged from said fuel injector is directed towards and impinges on either said proximal piston bowl surface half or said distal piston bowl surface half, wherein said fuel injector is adapted to discharge gaseous fuel at a discharge pressure being equal to or lower than 100 bar.