Method and system for solving problem of difficulty in opening of compressed natural gas (CNG) nozzle under low-temperature environment

A low-temperature environment, nozzle technology, applied in the direction of charging system, fuel injection control, oil supply device, etc., can solve the problem of difficult opening of CNG nozzles

Active Publication Date: 2014-12-24
北京合升众成科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention also provides a system for solving the difficulty of opening CNG nozzles in low temperature environment

Method used

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  • Method and system for solving problem of difficulty in opening of compressed natural gas (CNG) nozzle under low-temperature environment
  • Method and system for solving problem of difficulty in opening of compressed natural gas (CNG) nozzle under low-temperature environment
  • Method and system for solving problem of difficulty in opening of compressed natural gas (CNG) nozzle under low-temperature environment

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Embodiment 1

[0025] This embodiment provides a method for solving the difficulty in opening the CNG nozzle in a low-temperature environment. The method is to add a CNG nozzle low-temperature drive function program to the original CNG engine control system, and the controller can judge the The ambient temperature of the current CNG engine, in the case of low temperature, the controller can drive the CNG nozzle with high frequency for a short time, so that the temperature rises rapidly, melts the ice, and improves the low-temperature starting performance of the CNG engine.

[0026] The procedure of this method is as follows image 3 As shown, the implementation steps are:

[0027] Step 1, the controller in the compressed natural gas engine judges whether the ambient temperature reaches the set low temperature condition according to the intake air temperature and the cooling water temperature of the compressed natural gas engine; if it reaches the set low temperature condition, then execute s...

Embodiment 2

[0037] This embodiment provides a system that solves the difficulty of opening CNG nozzles in low temperature environments, and is used in compressed natural gas engines. The system includes a controller, and the controller is used to judge according to the intake air temperature and cooling water temperature of the compressed natural gas engine. Ambient temperature, when the ambient temperature reaches the set low temperature condition, the CNG nozzle is driven at high frequency instantaneously to realize deicing. The set low temperature condition is equal to or lower than -5°C. The driving time is less than or equal to 1s.

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Abstract

The invention discloses a method and a system for solving the problem of difficulty in the opening of a compressed natural gas (CNG) nozzle under a low-temperature environment, which are applied to a CNG engine. The method comprises the following steps of: 1, judging whether an ambient temperature reaches a set low temperature or not by using a controller in the CNG engine according to the air inlet temperature and the cooling water temperature of the CNG engine, if the set low temperature is reached, performing a step 2, and if the set low temperature is not reached, continuously judging the ambient temperature; and 2, instantaneously driving the CNG nozzle at high frequency by using the controller, wherein driving time corresponds to the ambient temperature. In the invention, a low-temperature judgment method is added, and the CNG nozzle is instantaneously driven by the controller at the high frequency and the low temperature, so that the CNG nozzle is instantaneously heated, a deicing function is realized, and the normal operation of the CNG nozzle at a later stage is ensured; in addition, hardware is not required to be added in the method and the system.

Description

technical field [0001] The invention belongs to the field of engine electric control, and relates to a method and a system for solving the difficulty in opening a CNG nozzle in a low-temperature environment. Background technique [0002] CNG (Compressed Natural Gas, CNG) nozzle is the core component of the CNG engine, and its performance directly affects the function of the engine. The nozzles of CNG gas systems currently on the market are prone to freezing in low-temperature environments, which makes it difficult to open the nozzles and seriously affects the low-temperature start-up performance of CNG engines. When users encounter this kind of problem, they often heat the CNG nozzle with hot water before starting the engine until the ice on the nozzle melts. This has caused obstacles to the widespread use of CNG vehicles in cold regions, and has also limited the promotion of CNG vehicles in cold regions. Contents of the invention [0003] The technical problem to be sol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/06F02M21/02
CPCY02T10/32Y02T10/30
Inventor 张鹏王飞邓金滔
Owner 北京合升众成科技有限公司
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