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Internal combustion engine

a combustion engine and combustion chamber technology, applied in the direction of machines/engines, non-mechanical valves, output power, etc., can solve problems such as difficult ignition, and achieve the effects of preventing or suppressing flame blowing, and reducing the flow rate of exhaust gas

Inactive Publication Date: 2013-02-14
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a control system for valves in a combustion engine. The system reduces the amount of exhaust gas that flows through the engine, which can help prevent flame blow-out and ensure sufficient ignition performance. The system achieves this by controlling the timing of the intake and exhaust valves to reduce the flow rate of exhaust gas when the amount of intake air is high. The system can also use negative pressure generated during the descent of the piston or prevent exhaust gas from flowing from certain cylinders to further reduce the flow rate of exhaust gas and ensure sufficient ignition performance.

Problems solved by technology

This is because at the increased flow rate, the exhaust gas may blow out the flame, making the ignition difficult.

Method used

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  • Internal combustion engine
  • Internal combustion engine
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Embodiment Construction

[0026]Preferred embodiments of the present invention will be described below in detail. However, it should be noted that the embodiments of the present invention are not limited to those which are described below and that the present invention includes any variations and applications embraced in the concepts of the present invention defined by the claims. The dimensions, materials, shapes, relative arrangements, and the like of components described in the embodiments are not intended to limit the technical scope of the present invention thereto unless otherwise specified.

[0027]FIG. 1 shows an engine main body 1 and an intake and exhaust system thereof according to an embodiment. The engine main body 1 is an onboard four-stroke diesel engine. An intake pipe 2 and an exhaust pipe 3 (exhaust passage) are connected to the engine main body 1. An air flow meter 4 is provided in the middle of the intake pipe 2 and outputs a signal corresponding to the flow rate of intake air flowing throug...

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Abstract

An internal combustion engine according to the present invention includes an exhaust treatment apparatus provided in an exhaust passage, and a burner apparatus provided upstream of the exhaust treatment apparatus to raise exhaust temperature. A valve driving state of at least one of an intake valve and an exhaust valve is controlled so as to reduce a flow rate of exhaust gas passing through the burner apparatus when the flow rate of the exhaust gas is equal to or larger than a predetermined value. Possible flame blow-out in the burner apparatus can be prevented or suppressed to ensure sufficient ignition performance.

Description

TECHNICAL FIELD[0001]The present invention relates to an internal combustion engine, and in particular, to an internal combustion engine with a burner apparatus provided in an exhaust passage and upstream of an exhaust treatment apparatus to raise exhaust temperature.BACKGROUND ART[0002]In some internal combustion engines, a burner apparatus is provided in an exhaust passage and upstream of an exhaust treatment apparatus (catalyst). Heated gas generated by the burner apparatus is utilized to raise exhaust temperature to heat the exhaust treatment apparatus, thus facilitating warm-up of the exhaust treatment apparatus.[0003]PTL1 discloses a catalyst temperature rise apparatus including an addition valve that allows fuel to be injected and ignition means with a heating section that allows the injected fuel to be ignited. The addition valve and the ignition means are disposed at such positions that allow the fuel injected through the addition valve to come into direct contact with the ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F01N3/10
CPCF01L9/02Y02T10/22F01L13/0005F01L2001/0537F01L2001/34496F01L2013/001F01L2800/00F01N3/0842F01N3/101F01N3/103F01N3/106F01N3/2066F01N2240/30F01N2610/102F01N3/2033F01N3/204F02D13/0219F02D13/06F01N2240/14Y02T10/18Y02T10/26F01L9/04Y02T10/12F01L9/10F01L9/20
Inventor UNO, KOKIHASHIMOTO, EIJIMORI, TAIICHIFUJIWARA, MASAHIROHANADA, SHUNICHIKANBA, CHIKA
Owner TOYOTA JIDOSHA KK