Exhaust manifold for multi-cylinder engine

Abstract

Disclosed is an exhaust manifold for engaging with a plurality of exhaust ports of a multi-cylinder engine for guiding an exhaust gas discharged out of from the multi-cylinder engine. The exhaust manifold includes a plurality of primary conduits and a secondary conduit. Each of the primary conduits includes inlet and exit end portions. Each of the inlet end portions is capable engaging with a corresponding exhaust port. The secondary conduit includes at least one inlet port and at least one exit port. The exit end portions of each of the primary conduits converges with the at least one inlet port to configure a passageway. With the convergence of each of the exit end portions port with the at least one inlet port, there is gradual increase in a cross sectional area of the passageway for guiding the exhaust gas to be discharged out from the multi-cylinder engine.

1 . An exhaust manifold for being engaged with a plurality of exhaust ports of a multi-cylinder engine for guiding an exhaust gas discharged out from the multi-cylinder engine, the exhaust manifold comprising:
 a plurality of primary conduits, each of the plurality of primary conduits having an inlet end portion and an exit end portion, each inlet end portion capable of being engaged with a corresponding exhaust port of the plurality of exhaust ports of the multi-cylinder engine; and   a secondary conduit having at least one inlet port and at least one exit port, each exit end portion of the plurality of primary conduits converges with the at least one inlet port to configure a passageway,   wherein with each convergence of the exit end portion with the at least one inlet port a cross sectional area of the passageway gradually increases for facilitating an outlet to the exhaust gas from the at least one exit port of the secondary conduit, thereby guiding the exhaust gas to be discharged out from the multi-cylinder engine.   
   
   
       2 . The exhaust manifold of  claim 1 , further comprising a plurality of attaching mechanisms, an attaching mechanism of the plurality of attaching mechanisms disposed on the each inlet end portion of the plurality of primary conduits for engaging the each inlet end portion with the corresponding exhaust port of the plurality of exhaust ports of the multi-cylinder engine. 
   
   
       3 . The exhaust manifold of  claim 1 , further comprising a coupling mechanism disposed at the at least one exit port for coupling with an exhaust pipe of the multi-cylinder engine. 
   
   
       4 . The exhaust manifold of  claim 1 , wherein each exit end portion of the plurality of primary conduits converges with the at least one inlet port at an end portion of the secondary conduit to configure the passageway. 
   
   
       5 . The exhaust manifold of  claim 1 , wherein the each exit end portion of the plurality of primary conduits converges with the at least one inlet port along a length of the secondary conduit to configure the passageway. 
   
   
       6 . The exhaust manifold of  claim 1 , wherein the passageway is of an oval cross section. 
   
   
       7 . The exhaust manifold of  claim 1 , wherein the at least one exit port is of a circular cross section. 
   
   
       8 . The exhaust manifold of  claim 1 , wherein each of the plurality of primary conduits is of a circular cross section. 
   
   
       9 . The exhaust manifold of  claim 1 , wherein the plurality of primary conduits is made of at least one of cast iron and stainless steel. 
   
   
       10 . The exhaust manifold of  claim 1 , wherein the secondary conduit is made of at least one of cast iron and stainless steel.