EP1270896A2
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EP
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Method and device for cooling charge air and hydraulic oil
Assignee: Titanx Engine Cooling AB
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Filing: 2002-06-19
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Granted: —
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Expires: 2022-06-19
Abstract
Abstract In a cooling device for cooling charge air from a compressor (3) in an engine (9) and hydraulic oil from a retarder (14), a first coolant flow (m1) is provided in a coolant conduit (20). The engine (9) is cooled by the whole first coolant flow (m1). The cooling device comprises a first a first charge-air cooler (4), which is cooled by means of a second coolant flow (m2), and a second charge-air cooler (5), which is cooled by means of a low-temperature fluid (32). The cooling device further comprises a retarder cooler (17) for cooling hydraulic oil from the retarder (14), said retarder cooler (17) being cooled by means of a third coolant flow (m3). Both the second coolant flow (m2) and the third coolant flow (m3) are subflows of the first coolant flow (m1). In a method utilizing the cooling device for cooling charge air as well as hydraulic oil from a retarder (14), a second coolant flow (m2) and a third coolant flow (m3) are used, both of which are subflows of the first coolant flow (m1).
Inventors
- 👤 Laszlo Valaszkai
- 👤 Marcus Karlsson
- 👤 Bruno Jouannet
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 18:07
CPC Classifications
F; F02; F02B; F02B29/00; F02B29/04; F02B29/0493; F01; F01P; F01P7/00; F01P7/14; F01P7/16; F01P7/165; F02B29/0406; F02B29/0412; F02B29/0437; F02B29/0443; F01P2060/00; F01P2060/02; F01P2060/06; F01P3/00; F01P3/20; F02B29/045; F02B29/0462; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
173 words
A cooling device for cooling charge air from a
compressor (3) in an engine (9) and hydraulic oil from
a retarder (14), in which cooling device a first coolant
flow (m1) is provided in a coolant conduit (20), characterised in
that the engine (9) is cooled by the whole first
coolant flow (m1), that the cooling device has a first charge-air
cooler (4), which is cooled by means of a second coolant
flow (m2), and a second charge-air cooler (5), which is
cooled by means of a low-temperature fluid (32), the
charge air being first conducted through the first
charge-air cooler (4) and then through the second charge-air
cooler (5) upon which it is introduced into the
engine (9), that the cooling device further comprises a retarder
cooler (17) for cooling hydraulic oil from the retarder
(14), said retarder cooler (17) being cooled by means of
a third coolant flow (m3), and that both the second coolant flow (m2) and the third
coolant flow (m3) are subflows of the first coolant flow
(m1)
Claim 2
Dependent Claim
34 words
A cooling device according to claim 1, wherein
both the retarder cooler (17) and the first charge-air
cooler (4) are connected downstream of the engine (9)
with regard to the circulation of the coolant.
Claim 3
Dependent Claim
29 words
A cooling device according to claim 1 or 2,
wherein a coolant circuit (23, 25; 205) is adapted to
cause the coolant to by-pass the first charge-air cooler
(4).
Claim 4
Dependent Claim
50 words
A cooling device according to claim 3, wherein
the first charge-air cooler (4) and the retarder cooler
(17) are connected in parallel with regard to the circulation
of the coolant, a valve (35; 101) being adapted
to cut off the second coolant flow (m2) when the retarder
(14) is activated.
Claim 5
Dependent Claim
36 words
A cooling device according to claim 4, wherein
the valve (35; 101) is a priority valve, which in the
case of a malfunction always directs the second coolant
flow (m2) to the first charge-air cooler (4).
Claim 6
Dependent Claim
111 words
A cooling device according to any one of the
preceding claims, which has a conduit system (20-26, 29,
31, 34) for circulating a coolant and, included therein,
a main thermostat (28), which is adapted to supply a
portion of the first coolant flow (m1) ranging from 0 to
100% depending on the temperature of said first coolant
flow (m1) to a radiator (30), which is cooled by means of
ambient air (32), the engine (9), the first charge-air
cooler (4) and the retarder cooler (17) being all located
in the part (20-26) of the conduit system in which the
quantity of coolant flow is essentially unaffected by the
main thermostat (28).
Claim 7
Dependent Claim
58 words
A cooling device according to any one of the preceding
claims, wherein the second coolant flow (m2) is at
least 50 % greater than the coolant flow at which the
charge air would cause the coolant to boil in the first
charge-air cooler (4), but amounts to a maximum of about
35% of said first coolant flow (m1).
Claim 8
Dependent Claim
67 words
A cooling device according to claim 7, wherein
the first charge-air cooler (4), at the operating point
in which the engine (9) develops maximum output and in
which the charge air supplied to the first charge-air
cooler (4) has a temperature of 200-270°C, presents a
maximum charge-air pressure drop of 4000 Pa and a charge-air
cooling capacity of more than 5 kW per dm 3 cooler
volume.
Claim 9
Independent Claim
180 words
A method utilizing a cooling device for cooling
charge air from a compressor (3) in an engine (9) and
hydraulic oil from a retarder (14), in which cooling
device a first coolant flow (m1) is provided in a coolant
conduit (20), characterised in
that the engine (9) is cooled by the whole first
coolant flow (m1), that the charge air is first cooled by means of a
first charge-air cooler (4) forming part of the cooling
device and being cooled by means of a second coolant flow
(m2), and is then cooled by means of a second charge-air
cooler (5) forming part of the cooling device and being
cooled by means of a low-temperature fluid (32), upon
which it is introduced into the engine (9), that hydraulic oil from the retarder (14) is cooled
by means of a retarder cooler (17) forming part of the
cooling device and being cooled by means of a third
coolant flow (m3), and that both the second coolant flow (m2) and the third
coolant flow (m3) are subflows of the first coolant flow
(m1).
Claim 10
Dependent Claim
34 words
A method according to claim 9, wherein the first
coolant flow (m1) is first conducted through the engine
(9) and then used to cool the first charge-air cooler (4)
and the retarder cooler (17).
Claim 11
Dependent Claim
76 words
A method according to claim 10, wherein the
first coolant flow (m1) is divided into a second coolant
flow (m2), which is conducted through the first charge-air
cooler (4), and a third coolant flow (m3), which is
conducted through the retarder cooler (17), which is
connected in parallel to the first charge-air cooler (4)
with regard to the circulation of the coolant, the second
coolant flow (m2) being cut off when the retarder (14) is
activated.
Claim 12
Dependent Claim
24 words
A method according to claim 11, wherein the
second coolant flow (m2) is cut off 1-10 s after the
retarder (14) has been activated.
References Cited (Backward Citations)
US5394854A
Cited
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