Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
251 words
A waste heat recovery system for an internal combustion
engine, to which Rankine cycle is applied, for recovering
waste heat of the internal combustion engine (1) that
generates at least two, first and second raised temperature
portions (202, 203) by operation, a degree of raised
temperature being higher at said first raised temperature
portion (202) than at said second raised temperature portion
(203), wherein said device comprises: evaporating means (3) having at
least two, first and second evaporating portions (205, 206),
the first evaporating portion (205) generating a first vapor
with raised temperature by using said first raised
temperature portion (202), while said second evaporating
portion (206) generating a second vapor with raised
temperature by using said second raised temperature portion
(203) and with a lower pressure than said first vapor; an expander (4) having at least two, first and second
energy converting portions (207, 208), the first energy
converting portion (207) converting an expansion energy of
said first vapor introduced from said first evaporating
portion (205) into a mechanical energy, while said second
energy converting portion (208) converting an expansion
energy of said second vapor introduced from said second
evaporating portion (206) into a mechanical energy, and both
mechanical energies being integrated to be output; a condenser (5) for liquefying said first and second
vapors, which are exhausted from the expander (4), with
dropped pressure after said conversion; and a supply pump (6) for supplying liquid from the condenser
(5) to said first and second evaporating portions (205, 206),
respectively.
Claim 2
Dependent Claim
255 words
A waste heat recovery system for an internal combustion
engine, to which Rankine cycle is applied, for recovering
waste heat of the internal combustion engine (1) that
generates at least two, first and second raised temperature
portions (202, 203) by operation, a degree of raised
temperature being higher at said first raised temperature
portion (202) than at said second raised temperature portion
(203), wherein said device comprises: evaporating means (3) having at
least two, first and second evaporating portions (205, 206),
the first evaporating portion (205) generating a first vapor
with raised temperature by using said first raised
temperature portion (202), while said second evaporating
portion (206) generating a second vapor with raised
temperature by using said second raised temperature portion
(203) and with a lower pressure than said first vapor; a displacement type expander (4) having at least two,
first and second energy converting portions (207, 208), the
first energy converting portion (207) converting an expansion
energy of said first vapor introduced from said first
evaporating portion (205) into a mechanical energy, while
said second energy converting portion (208) converting an
expansion energy of said second vapor introduced from said
second evaporating portion (206) into a mechanical energy,
and both mechanical energies being integrated to be output; a condenser (5) for liquefying said first and second
vapors, which are exhausted from the displacement type
expander (4), with dropped pressure after said conversion;
and a supply pump (6) for supplying liquid from the condenser
(5) to said first and second evaporating portions (205, 206),
respectively.
Claim 3
Dependent Claim
58 words
A waste heat recovery system for an internal combustion
engine according to claim 1 or 2, wherein said second energy
converting portion (208) of said expander (4) has a function
of converting an expansion energy of the first vapor, which
is introduced from said first evaporating portion (205), with
dropped pressure after said conversion, into a mechanical
energy.
Claim 4
Dependent Claim
40 words
A waste heat recovery system for an internal combustion
engine according to claim 3, wherein an expansion ratio of
said first vapor is set such that a pressure of the dropped
pressure vapor matches a pressure of said second vapor.