US6158398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbocharged engine cooling system with two two-pass radiators
Assignee: Caterpillar Inc
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Filing: 1999-05-21
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Granted: 2000-12-12
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Expires: 2019-05-21
Abstract
Abstract A dual circuit cooling system for a vehicle having an engine and a turbocharger aftercooler includes a modular radiator system having partitions in the tanks of the radiator. The partitions create separate radiator sections, and the partitions contain orifices that provide a crossover function between the sections. During cooler engine operating temperatures the engine thermostat closes which causes engine coolant to be circulated mainly within the engine, and which also causes pressure downstream of the thermostat to drop. The reduced pressure allows coolant from the aftercooler circuit to pass through a first crossover and circulate through the main radiator, then through a second crossover and back to the aftercooler circuit. During higher engine temperatures the thermostat opens, equalizing pressure between the circuits, thus creating normal flow through the circuits.
Inventors
- 👤 Michael D. Betz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:14
CPC Classifications
F; F02; F02B; F02B29/00; F02B29/04; F02B29/0406; F02B29/0437; F02B29/0443; F01; F01P; F01P7/00; F01P7/14; F01P7/16; F01P7/165; F01P5/00; F01P5/10; F01P2005/105; F01P2007/143; F01P2060/00; F01P2060/02; F01P2060/04; F01P3/00; F01P3/20; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
160 words
A cooling system for an engine and an aftercooler associated with the engine comprising: at least a primary radiator having at least one primary radiator outlet and at least one primary radiator inlet; at least one jacket water (JW) pump disposed for pumping coolant from the primary radiate outlet to the engine; at least one upstream secondary radiator having at least one secondary radiator inlet in communication with the aftercooler, the secondary radiator also having at least one secondary radiator outlet communicating with the aftercooler; at least a first crossover establishing a pathway for fluid communication between the primary radiator outlet and the secondary radiator outlet; at least a second crossover establishing a pathway for fluid communication between the primary radiator inlet and an outlet of the aftercooler; and at least a downstream secondary radiator in fluid communication with the upstream secondary radiator via an interconnect, the first crossover establishing fluid communication between the interconnect and the primary radiator outlet.
Claim 2
Dependent Claim
160 words
A cooling system for an engine and an aftercooler associated with the engine comprising: at least a primary radiator having at least one primary radiator outlet and at least one primary radiator inlet; at least one jacket water (JW) pump disposed for pumping coolant from the primary radiate outlet to the engine; at least one upstream secondary radiator having at least one secondary radiator inlet in communication with the aftercooler, the secondary radiator also having at least one secondary radiator outlet communicating with the aftercooler; at least a first crossover establishing a pathway for fluid communication between the primary radiator outlet and the secondary radiator outlet; at least a second crossover establishing a pathway for fluid communication between the primary radiator inlet and an outlet of the aftercooler; and at least a downstream secondary radiator in fluid communication with the upstream secondary radiator via an interconnect, the first crossover establishing fluid communication between the interconnect and the primary radiator outlet.
Claim 3
Dependent Claim
38 words
The system of claim 1, wherein at least one of the radiators is a two-pass radiator, and the system further comprises at least one shunt tank disposed above the JW pump in fluid communication with a suction thereof.
Claim 4
Dependent Claim
19 words
The system of claim 1, further comprising at least flow restrictor disposed in at least one of the crossovers.
Claim 5
Dependent Claim
20 words
The system of claim 1, further comprising at least one flow restrictor in fluid communication with the primary radiator inlet.
Claim 6
Dependent Claim
20 words
The system of claim 1, further comprising at least one flow restrictor in fluid communication with the primary radiator outlet.
Claim 7
Dependent Claim
10 words
The system of claim 1, in combination with an engine.
Claim 8
Dependent Claim
11 words
The combination of claim 6, in further combination with a vehicle.
Claim 9
Dependent Claim
137 words
A cooling system for an engine of a vehicle having an aftercooler, comprising at least a primary radiator having at least one primary radiator outlet and at least one primary radiator inlet; at least one jacket water (JW) pump disposed for pumping coolant from the primary radiator outlet to the engine; at least one upstream secondary radiator having at least one secondary radiator inlet in communication with the aftercooler, the secondary radiator also having at least one secondary radiator outlet communicating with the aftercooler; at least a first crossover establishing a pathway for fluid communication between the primal radiator outlet and the secondary radiator outlet; and at least a downstream secondary radiator in fluid communication with the upstream secondary radiator via an interconnect, the first crossover establishing fluid communication between the interconnect and the primary radiator outlet.
Claim 10
Dependent Claim
137 words
A cooling system for an engine of a vehicle having an aftercooler, comprising at least a primary radiator having at least one primary radiator outlet and at least one primary radiator inlet; at least one jacket water (JW) pump disposed for pumping coolant from the primary radiator outlet to the engine; at least one upstream secondary radiator having at least one secondary radiator inlet in communication with the aftercooler, the secondary radiator also having at least one secondary radiator outlet communicating with the aftercooler; at least a first crossover establishing a pathway for fluid communication between the primal radiator outlet and the secondary radiator outlet; and at least a downstream secondary radiator in fluid communication with the upstream secondary radiator via an interconnect, the first crossover establishing fluid communication between the interconnect and the primary radiator outlet.
Claim 11
Dependent Claim
38 words
The system of claim 8, wherein at least one of the radiators is a two-pass radiator, and the system further comprises at least one shunt tank disposed above the JW pump in fluid communication with a suction thereof.
Claim 12
Dependent Claim
29 words
The system of claim 8, further comprising: at least a second crossover establishing a pathway for fluid communication between the primary radiator inlet and an outlet of the aftercooler.
Claim 13
Dependent Claim
19 words
The system of claim 10, further comprising at least flow restrictor disposed in at least one of the crossovers.
Claim 14
Dependent Claim
20 words
The system of claim 8, further comprising at least one flow restrictor in fluid communication with the primary radiator inlet.
Claim 15
Dependent Claim
20 words
The system of claim 8, further comprising at least one flow restrictor in fluid communication with the primary radiator outlet.
Claim 16
Dependent Claim
10 words
The system of claim 8, in combination with an engine.
Claim 17
Dependent Claim
11 words
The combination of claim 14, in further combination with a vehicle.
Claim 18
Dependent Claim
160 words
A cooling system for an engine and an aftercooler associated with the engine, comprising: at least a primary radiator having at least one primary radiator outlet and at least one primary radiator inlet; at least one jacket water (JW) pump disposed for pumping coolant from the primary radiator outlet to the engine; at least one upstream secondary radiator having at least one secondary radiator inlet in communication with the aftercooler, the secondary radiator also having at least one secondary radiator outlet communicating with the aftercooler; at least a second crossover establishing a pathway for fluid communication between the primary radiator inlet and an outlet of the aftercooler; at least a first crossover establishing a pathway for fluid communication between the primary radiator outlet and the secondary radiator outlet; and at least a downstream secondary radiator in fluid communication with the upstream secondary radiator via an interconnect, the first crossover establishing fluid communication between the interconnect and the primary radiator outlet.
Claim 19
Dependent Claim
160 words
A cooling system for an engine and an aftercooler associated with the engine, comprising: at least a primary radiator having at least one primary radiator outlet and at least one primary radiator inlet; at least one jacket water (JW) pump disposed for pumping coolant from the primary radiator outlet to the engine; at least one upstream secondary radiator having at least one secondary radiator inlet in communication with the aftercooler, the secondary radiator also having at least one secondary radiator outlet communicating with the aftercooler; at least a second crossover establishing a pathway for fluid communication between the primary radiator inlet and an outlet of the aftercooler; at least a first crossover establishing a pathway for fluid communication between the primary radiator outlet and the secondary radiator outlet; and at least a downstream secondary radiator in fluid communication with the upstream secondary radiator via an interconnect, the first crossover establishing fluid communication between the interconnect and the primary radiator outlet.
Claim 20
Dependent Claim
38 words
The system of claim 16, wherein at least one of the radiators is a two-pass radiator, and the system further comprises at least one shunt tank disposed above the JW pump in fluid communication with a suction thereof.
Claim 21
Dependent Claim
73 words
A cooling system for an engine and an aftercooler associated with the engine, comprising: an aftercooler cooling circuit and an engine cooling circuit, at least one of the circuits having an effective variable capacity established by virtue of at least one crossover between the circuits, the aftercooler cooling circuit including at least two two-pass secondary radiators, at least one orifice being disposed in the system for defining a no-flow condition in the crossover.
Claim 22
Dependent Claim
73 words
A cooling system for an engine and an aftercooler associated with the engine, comprising: an aftercooler cooling circuit and an engine cooling circuit, at least one of the circuits having an effective variable capacity established by virtue of at least one crossover between the circuits, the aftercooler cooling circuit including at least two two-pass secondary radiators, at least one orifice being disposed in the system for defining a no-flow condition in the crossover.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-12-12 | 2004-06-12 | 2004-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-12-12 | 2008-06-12 | 2008-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-12-12 | 2012-06-12 | 2012-12-12 | $7700.00 | Window Closed / Lapsed |