Cooling water control apparatus
First Claim
1. A cooling water control apparatus which is configured to control a cooling apparatus,the cooling apparatus having:
- (i) a first pipe in which cooling water is circulated such that the cooling water passes through an engine;
(ii) a second pipe in which the cooling water is circulated such that the cooling water does not pass through the engine;
(iii) a valve which is located at a downstream side of the engine and which is configured to adjust a flow amount of the cooling water flowing from the first pipe to the second pipe; and
(iv) an exhaust heat recovery equipment located on the second pipe,the exhaust heat recovery equipment having;
a heat exchange pipe into which exhaust gas flows and in which heat exchange between the exhaust gas and the cooling water is performed; and
an adjuster which is configured to adjust a flow amount of the exhaust gas which flows into the heat exchange pipe,the cooling water control apparatus comprising a controller,the controller being programmed to;
perform a determination operation to determine whether or not the valve has failure on the basis of a difference between a first water temperature and second water temperature, wherein the first water temperature is temperature of the cooling water in a pipe part of the first pipe which is located between the engine and the valve, the second water temperature is temperature of the cooling water in the second pipe; and
control the adjuster during the determination operation such that (i) a transferred heat amount which is transferred to the cooling water in the exhaust heat recovery equipment decreases with an increase of a load of the engine or (ii) the transferred heat amount is maintained regardless of a magnitude of the load of the engine.
1 Assignment
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Accused Products
Abstract
A cooling water control apparatus is configured to control a cooling apparatus, wherein the cooling apparatus includes: a first pipe in which the cooling water passes through an engine; a second pipe in which the cooling water does not pass through the engine; a valve; and an exhaust heat recovery equipment, the cooling water control apparatus includes: a determining device for performing a determination operation to determine whether or not the valve has failure on the basis of difference between first water temperature and second water temperature; and a controlling device for controlling the cooling apparatus such that transferred heat amount in the exhaust heat recovery equipment decreases with increase of load of the engine or the transferred heat amount is maintained regardless of largeness of the load of the engine, when the determining device performs the determination operation.
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Citations
5 Claims
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1. A cooling water control apparatus which is configured to control a cooling apparatus,
the cooling apparatus having: - (i) a first pipe in which cooling water is circulated such that the cooling water passes through an engine;
(ii) a second pipe in which the cooling water is circulated such that the cooling water does not pass through the engine;
(iii) a valve which is located at a downstream side of the engine and which is configured to adjust a flow amount of the cooling water flowing from the first pipe to the second pipe; and
(iv) an exhaust heat recovery equipment located on the second pipe,the exhaust heat recovery equipment having;
a heat exchange pipe into which exhaust gas flows and in which heat exchange between the exhaust gas and the cooling water is performed; and
an adjuster which is configured to adjust a flow amount of the exhaust gas which flows into the heat exchange pipe,the cooling water control apparatus comprising a controller, the controller being programmed to; perform a determination operation to determine whether or not the valve has failure on the basis of a difference between a first water temperature and second water temperature, wherein the first water temperature is temperature of the cooling water in a pipe part of the first pipe which is located between the engine and the valve, the second water temperature is temperature of the cooling water in the second pipe; and control the adjuster during the determination operation such that (i) a transferred heat amount which is transferred to the cooling water in the exhaust heat recovery equipment decreases with an increase of a load of the engine or (ii) the transferred heat amount is maintained regardless of a magnitude of the load of the engine. - View Dependent Claims (2, 3, 4, 5)
- (i) a first pipe in which cooling water is circulated such that the cooling water passes through an engine;
Specification