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Engine control system

A control system and engine technology, applied in engine control, engine components, combustion engines, etc., can solve the problems of catalyst purification performance and persistence, and difficulty in ensuring space.

Inactive Publication Date: 2006-12-27
MITSUBISHI FUSO TRUCK AND BUS CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is difficult to secure a space for an oxidation catalyst supply source
Moreover, in the case of a diesel engine, the NO of the oxidation catalyst 2 Production performance is often adversely affected by sulfur in the exhaust generated by the sulfur content in the fuel
Further, the purification performance and persistence of the catalyst may be affected by sulfur

Method used

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  • Engine control system
  • Engine control system
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Examples

Experimental program
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Embodiment Construction

[0026] refer to in figure 1 An embodiment of an engine control system shown in will describe the invention. It is assumed that the engine control system is included in a multi-cylinder diesel engine 1 (referred to as "engine 1") installed in a vehicle (not shown).

[0027] The engine 1 is controlled by an engine control unit 3 (referred to as "engine ECU 3") of the engine control system. A NOx purification facility 2 in the exhaust system is controlled by an exhaust gas control unit 4 (referred to as "exhaust ECU 4"). The engine ECU 3 and the exhaust system ECU 4 communicate with each other via a communication control line 5 .

[0028] refer to figure 1 , the engine ECU 3 is connected to an accelerator pedal depression sensor 6 and a crank angle sensor 7 . The accelerator pedal depression sensor 6 detects the accelerator pedal depression amount θa, and the crank angle sensor 7 detects the crank angle and generates crank angle data Δθ. The crank angle data Δθ is used for...

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Abstract

Engine regulating system comprises a NOx catalyst unit (13) containing ammonia as a reducing agent arranged in an exhaust gas system of an I.C. engine to selectively reduce NOx from the exhaust gases, a reducing agent feed line (14) for introducing reducing agent to the exhaust gas system and positioned on the flow side of the NOx catalyst, sensors (15, 22) for detecting the amount of NOx in the exhaust gas, a fuel injection system for injecting fuel into the I.C. engine in a main injection mode, and a regulating unit (12) for activating the fuel injection system in a pilot and main injection mode when a NOx degree of purity emitted is not more than a predetermined NOx degree of purity.

Description

technical field [0001] The present invention relates to an engine control system equipped with a NOx purification facility for purifying NOx in exhaust gas, and more particularly, to an engine control system for injecting fuel in a main injection mode or a pre- and main injection mode. Background technique [0002] Generally, NOx in exhaust gas discharged from an internal combustion engine is purified by a NOx purification facility. For example, a NOx purification facility for a diesel engine consists of a catalytic converter including a NOx catalyst and provided in an exhaust system and selectively purifying NOx, and a urea solution supply source arranged upstream of the catalytic converter. [0003] The NOx catalyst consists of a vanadium oxide (V 2 o 2 ) catalyst carrier, and purify NOx in an atmosphere filled with excess oxygen. [0004] The hydrolysis and pyrolysis of urea solution are represented by the following chemical formula. Hydrolyzed and pyrolyzed urea solu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/38F02D45/00F02B29/04F02D41/14F02D41/02F02M45/04F02D41/34F02D41/40F01N3/24B01D53/94F02M63/02F01N3/20F01N11/00F01N3/08F02B37/00
CPCF01N2610/02F01N3/0842F02M63/0225F01N11/00F02D41/1461Y02T10/24Y02T10/44F02D41/0235F02D41/1463F02M45/04F01N3/0814F01N3/2066F02D41/146F02D41/403F02D2200/0802F02B37/00F02B29/0425Y02A50/20Y02T10/12Y02T10/40F02D41/34
Inventor 川谷聖小野田直樹上瀧裕史篠嵜律子高橋嘉則武田好央佐佐木健次河合健二斎藤真一高橋政行
Owner MITSUBISHI FUSO TRUCK AND BUS CORPORATION