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Turbocharged engine

A turbocharger and engine technology, applied in the direction of machines/engines, engine components, engine control, etc., can solve problems such as residual boosting and damage

Inactive Publication Date: 2005-02-02
ISUZU MOTORS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in an engine with a turbocharger, when the vehicle decelerates, there is residual boost in the intake passage, and sometimes the intake pressure exceeds the surge line of the compressor of the turbocharger
When the surge line is exceeded, the compressor may surge and may be damaged due to vibration or heat

Method used

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Examples

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Embodiment Construction

[0016] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[0017] figure 1 A turbocharged diesel engine of this embodiment is shown. The diesel engine 10 with a turbocharger includes: an engine body 11 , a turbocharger 12 , an intake passage 15 , an exhaust passage 16 and an EGR device 26 .

[0018] A combustion chamber 25 is provided on the engine body 11 . Moreover, the engine body 11 further includes: a fuel injection valve 18 for injecting fuel into the combustion chamber 25; an engine speed sensor 22 as an engine speed detection mechanism for detecting the engine speed. The turbocharger 12 is provided with a turbine 13 and a compressor 14 which are connected to each other by a rotary shaft.

[0019] The upstream side of the intake passage 15 is connected to the compressor 14 , and the downstream side is connected to the combustion chamber 25 , respectively. The intake passage 15 is also provided wit...

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PUM

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Abstract

The present invention provides an engine with a turbocharger capable of preventing compressor surge caused when a vehicle is decelerated. The engine with a turbocharger is provided with an EGR device (26), and the EGR device includes: an EGR passage (19), communicating between the intake passage (15) and the exhaust passage (16); the EGR valve (20 ), which is arranged in the above-mentioned EGR passage (19); also includes: a deceleration judging mechanism for judging the deceleration of the vehicle; and an air intake opening mechanism for opening the above-mentioned EGR valve (20) when the deceleration judging mechanism determines that the vehicle is decelerating, Part of the intake air in the intake passage (15) flows to the exhaust passage (16) through the EGR passage (19).

Description

technical field [0001] The present invention relates to an engine with a turbocharger provided with an EGR device having an EGR passage connecting an intake passage and an exhaust passage, and an EGR valve provided in the EGR passage. Background technique [0002] An EGR device (exhaust gas recirculation device) is generally known as a device for reducing NOx (nitrogen oxide) emissions. This EGR device includes an EGR passage for communicating an intake passage and an exhaust passage, and an EGR valve provided on the EGR passage. [0003] The EGR device is a device that, after opening the EGR valve, allows a part of the exhaust gas in the exhaust passage to flow to the intake passage through the EGR passage, mixes it with the intake air, and guides it to the combustion chamber, thereby making the intake air Oxygen concentration is reduced, the combustion temperature is reduced, so that the emission of NOx is reduced. [0004] Such an EGR device is also used in an engine wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B37/00F02B37/10F02B37/16F02B39/16F02D21/08F02D23/00F02D41/00F02M25/07
CPCF02D41/0055F02B37/10F02B37/16F02D41/0005F02D41/0007F02M25/0704F02M25/0707Y02T10/144Y02T10/42Y02T10/47F02M26/05F02M26/02Y02T10/12Y02T10/40
Inventor 河野和利波多野健二河合新一郎长田英树
Owner ISUZU MOTORS LTD
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