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EP0126620A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Engine cooling system

Assignee: Caterpillar Marine Power UK Ltd
•
Filing: 1984-05-16
•
Granted: —
•
Expires: 2004-05-16
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Abstract

Abstract A diesel engine (2) having a charge air cooler (34) is liquid cooled and employs a single heat exchanger (28) for cooling the coolant for both the cylinder block (4) and the charge air cooler (34). The engine block (4) is connected in a first cooling circuit which includes a pump (8) and a thermostatic valve (12), while the charge air cooler (34) is connected in a second circuit including the heat exchanger (28) and pump (30). When the coolant in the first circuit is below the operating temperature, the two circuits operate independently. When operating temperature is reached, the valve (12) opens to bring the two circuits partly in series, with the second circuit between the heat exchanger (28) and the first circuit at the downstream side of the heat exchanger, so that the charge air cooler (34) operates at a lower temperature than the engine cylinder block (4).

Inventors

  • 👤 George Christopher Kaye

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-29 19:32
CPC Classifications
F; F01; F01P; F01P7/00; F01P7/14; F01P7/16; F01P7/165; F01P3/00; F01P3/20; F02; F02B; F02B29/00; F02B29/04; F02B29/0406; F02B29/0437; F02B29/0443; F01P5/00; F01P5/10; F01P2005/105; F01P2060/00; F01P2060/02; F01P2060/04; F01P2060/16; F02B3/00; F02B3/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 90 words
A cooling system for a diesel engine having charge air cooling, the system comprising a first, engine cylinder block, cooling circuit (8, 4, 16, 10, 18, 14, 29) and a second, charge air cooling, circuit (30, 38, 32, 40, 34, 42, 44, 26) each employing a liquid coolant, characterised in means (12, 24) for connecting the two circuits in series with one another and with a single heat exchanger (28) for cooling coolant passing therethrough, with the second circuit downstream of the heat exchanger and upstream of the first circuit.
Claim 2
Dependent Claim 90 words
A cooling system for a diesel engine having charge air cooling, the system comprising a first, engine cylinder block, cooling circuit (8, 4, 16, 10, 18, 14, 29) and a second, charge air cooling, circuit (30, 38, 32, 40, 34, 42, 44, 26) each employing a liquid coolant, characterised in means (12, 24) for connecting the two circuits in series with one another and with a single heat exchanger (28) for cooling coolant passing therethrough, with the second circuit downstream of the heat exchanger and upstream of the first circuit.
Claim 3
Dependent Claim 40 words
A cooling system according to claim 1, in which the connecting means (12, 24) are temperature controlled in such manner that the two circuits operate independently until the temperature of the coolant in the first circuit reaches a given value.
Claim 4
Dependent Claim 74 words
A cooling system according to claim 2, in which the connecting means include a temperature-responsive valve (12) in the first circuit, which valve has an inlet and a first outlet connected to the first circuit and a second outlet connected to the inlet of the heat exchanger (28) and is arranged to deliver at least a part of the coolant of the first circuit to the heat exchanger when the given temperature is reached.
Claim 5
Dependent Claim 28 words
A cooling system according to claim 3, in which the second circuit has a return passage (42) connected to both the heat exchanger (28) and the first circuit.

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