System and method for combustion control of duel fuel engine

A dual-fuel engine and control system technology, applied in engine control, combustion engine, fuel injection control and other directions, can solve the problems of low efficiency and high emissions of dual-fuel engines, and achieve the goal of improving engine efficiency, reducing fuel consumption, and avoiding knocking. Effect

Active Publication Date: 2012-07-11
BEIQI FOTON MOTOR CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of low efficiency and high emission of the existing dual-fuel engine, the present invention proposes a combustion control system and a combustion control method for the dual-fuel engine, which improves the working efficiency of the dual-fuel engine and reduces emissions

Method used

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  • System and method for combustion control of duel fuel engine
  • System and method for combustion control of duel fuel engine
  • System and method for combustion control of duel fuel engine

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Embodiment approach

[0014] According to one embodiment, the first fuel can be gasoline, and the second fuel can be CNG. In the following description, the technical solution of the present invention will be described in detail by taking the above two fuels as examples, but it needs to be understood Yes, the present invention does not intend to limit the fuel to the above two.

[0015] Wherein, the dual-fuel intake device can be communicated between the gas outlet of the air filter 7 and the intake port of the combustion chamber, that is, the gas outlet of the air filter 7 is communicated with the gas inlet of the air intake device, The gas outlet of the dual-fuel intake device is connected to the combustion chamber intake port throttle, so that the combustion mixture after passing through the air filter 7 is connected to the combustion chamber through the intake device provided by the present invention. The dual-fuel intake device can realize two intake modes of boosted intake and natural air inta...

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Abstract

The invention provides a system and a method for combustion control of a duel fuel engine. The combustion control system comprises a dual fuel air intake device, an electric control unit (100), and a wide-band oxygen sensor (200) arranged on an exhaust channel of a combustion chamber and connected to the electric control unit (100). The duel fuel air intake device comprises a non-boosting air intake channel (301), a boosting air intake channel (302) and a channel converting unit controlled by the electric control unit (100). The electric control unit is used for receiving fuel conversion signals and oxygen concentration signals from the wide-band oxygen sensor (200), controlling the channel converting unit according to the fuel conversion signals and determining target air-fuel ratio, and maintaining the combustion air-fuel ratio at the determined target air-fuel ratio based on the oxygen concentration signals. The combustion control system and the method provided by the invention can improve the working efficiency of the duel fuel engine and reduce exhaust.

Description

technical field [0001] The invention relates to an engine control system, in particular to a combustion control system and a combustion control method for a dual-fuel engine. Background technique [0002] In recent years, with people's increasing emphasis on environmental protection, natural gas (CNG) vehicles with good emission characteristics, especially CNG urban buses, are rapidly popularized across the country. CNG vehicles also have the advantages of saving fuel costs, high fuel safety, and good anti-knock performance. However, the lack of natural gas sources has always plagued the promotion of CNG vehicles, especially in winter when residents use more gas for heating, and the natural gas used for vehicles is seriously insufficient. Therefore, gasoline-natural gas dual-fuel engine vehicles are the most widely used at present. Once a gas shortage occurs in winter, vehicle systems such as urban buses can use gasoline for a short transition to prevent the paralysis of pu...

Claims

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Application Information

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IPC IPC(8): F02D41/04F02D19/06F02D23/02
CPCY02T10/36Y02T10/144Y02T10/12Y02T10/30
Inventor 陈瀚孙宁高景博李峰甄顺田
Owner BEIQI FOTON MOTOR CO LTD
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