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Engine control device

A control device and engine technology, applied in engine control, engine components, combustion engines, etc., can solve problems such as thermal efficiency decline and fuel efficiency deterioration

Inactive Publication Date: 2014-06-18
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The result is a decrease in thermal efficiency, i.e. worsening fuel efficiency

Method used

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Experimental program
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Embodiment Construction

[0027] Embodiments of the present invention will be described with reference to the drawings.

[0028] figure 1 The illustrated engine cooling device (hereinafter referred to as a cooling device) 1 is installed in a vehicle not shown, and includes a water pump (hereinafter referred to as a W / P) 11, a radiator 12, a thermostat 13, The flow regulating valve 14 , the engine 50 , and the first to fourth local flow regulating valves 61 to 64 . The W / P 11 is a cooling medium pressure feeding part, and is a variable W / P that feeds cooling water as a cooling medium by pressure, and makes the flow rate of the cooling water to be pressure fed variable. The cooling water pressure-fed by the W / P 11 is supplied to the engine 50 .

[0029] The engine 50 includes a cylinder block 51 and a cylinder head 52 . A body-side water jacket (hereinafter referred to as body-side W / J) 511 as a first cooling medium passage is formed in the cylinder block 51 . The body side W / J511 forms a systematic...

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PUM

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Abstract

An ECU 70 is provided to an engine 50 including a TCV 57 that changes a tumble flow generated inside a cylinder and being configured to be capable of securing a cooling of a cylinder block 51 and suppressing an occurrence of a cooling loss in a cylinder head 52. The ECU 70 includes a control unit that feedback-controls the TCV 57 based on a primary blow-off voltage Vi so that a flow velocity of air flowing along a surface on the cylinder head 52 side becomes greater than a flow velocity of air flowing along a surface on the piston 53 side in a case where a flow velocity of air flowing along a surface on one of the cylinder head 52 side and the piston 53 side becomes greater than a flow velocity of air flowing along a surface on another side in the cylinder.

Description

technical field [0001] The present invention relates to engine control devices. Background technique [0002] Cooling is usually performed in the engine. In addition, the engine sometimes generates tumble flow inside the cylinder. Regarding this point, for example, Patent Document 1 discloses a technique of varying the tumble flow generated in the cylinder. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2005-180247 Contents of the invention [0006] The problem to be solved by the invention [0007] Cooling of the engine is performed, for example, to suppress the occurrence of knocking. However, if it is overcooled, the cooling loss will increase. As a result, thermal efficiency decreases, ie, fuel efficiency deteriorates. Therefore, when cooling the engine, it is preferable to perform cooling as needed, thereby suppressing the occurrence of cooling loss as much as possible, and ensuring...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/02F01P7/16F02B23/10F02B31/00
CPCF02D41/064F02D41/0002F01P2003/027F02P2017/121F02B31/085Y02T10/42F02D2041/0015Y02T10/40
Inventor 大村哲生
Owner TOYOTA JIDOSHA KK