Reducing turbocharged engine overheating

A turbocharger and engine technology, applied in engine components, combustion engines, engine control, etc., can solve the problem of not keeping the temperature of the cylinder head below the melting point of the engine metal

Active Publication Date: 2014-09-17
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, with turbocharged and other high-specific power output engines, traditional fail-safe cooling strategies such as deactivation of alternating engine banks and air cooling may not be able to maintain cylinder head temperatures below the melting point of the engine metal

Method used

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  • Reducing turbocharged engine overheating
  • Reducing turbocharged engine overheating
  • Reducing turbocharged engine overheating

Examples

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Embodiment Construction

[0017] The present description relates to a method of deactivating one or more engine cylinders while limiting engine load in response to coolant loss in a turbocharged engine. In one example, the method includes deactivating one or more engine cylinders while limiting one or more active cylinder loads while maintaining engine speed below a threshold engine speed, and while maintaining engine cylinders below a third threshold temperature. In this manner, engine cylinder overheating may be mitigated while maintaining vehicle drivability and vehicle operability over a range of engine operating conditions.

[0018] figure 1 An example of a turbocharged engine is shown, including an intake compressor, exhaust turbine, wastegate, and engine controller. figure 2 An example of an exhaust manifold temperature sensor that may be used to provide an indication of engine cylinder head temperature is shown. Figure 3-5 are example curves for cylinder head temperature versus engine speed...

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Abstract

A method comprising in response to coolant loss in a turbocharged engine, deactivating one or more engine cylinders while limiting engine load of one or more active cylinders based on an engine speed, and a cylinder head temperature.

Description

technical field [0001] The present invention relates to reducing overheating of turbocharged engines. Background technique [0002] Engines may be cooled by circulating a coolant fluid, such as water, through passages in the engine. Engine metal components can overheat in the event of cooling system degradation (e.g. water pump degradation) or coolant loss (e.g. due to coolant system leaks). [0003] Gebby et al. (US 7,204,235) address overheating in the event of cooling system degradation by alternately closing each bank of fuel injectors of the engine cylinders and air cooling the deactivated engine banks with unburned charge air. Alternately deactivating each bank of cylinders may provide a portion of engine torque for vehicle operation. [0004] The inventors herein have recognized potential problems with the above approach. That is, with turbocharged and other high-specific power output engines, traditional fail-safe cooling strategies such as deactivation of alterna...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D17/02F02D9/00F02D28/00F02B37/00
CPCF02D17/02Y02T10/144F02D13/06Y02T10/12F01P5/14F02D17/04F02D35/025F02D41/22F02D2041/227
Inventor K·维拉德J·E·罗林格V·E·马鲁齐
Owner FORD GLOBAL TECH LLC
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