玉柴CNG单燃料发动机原理与控制详解

需积分: 10 1 下载量 54 浏览量 更新于2024-07-09 收藏 1.93MB PDF 举报
玉柴CNG单燃料发动机资料详细介绍了玉柴机器股份有限公司的CNG发动机,该发动机采用先进的EControl系统进行电控管理。CNG发动机的工作原理主要包括以下几个关键组件和过程: 1. **高压天然气供应与过滤**: 高压压缩天然气从储气钢瓶出来,首先经过天然气滤清器进行过滤,确保燃气的清洁。 2. **高压减压与加热**: 高压天然气经过高压电磁阀进入高压减压器,减压器通过调节节流孔的流通面积和加热功能,将高压天然气降至6bar-9bar,避免减压过程中因膨胀而产生的结冰问题。 3. **电控调压器**: 电控调压器是发动机的核心部件之一,它根据发动机运行状态精确控制天然气的喷射量。通过与ECM(电子控制模块)的通信,确保混合气的空燃比处于理想状态。 4. **燃料供应与控制**: HDEPR系统(高效动态电子压力调节器)通过调整电控调压器出口的燃料压力,依据ECM的指令,实现燃料供应的闭环控制。通过监测氧传感器数据,ECM能够实时调整喷气量,确保最优的燃烧效率。 5. **主要部件介绍**: - **高压减压器**:利用压力膜片克服弹簧阻力,通过杠杆改变流通面积,控制天然气的压力并进行减压和加热。 - **安装要求**:高压减压器需遵循特定安装位置、角度以及气路连接的密封规范,以保证其正常运行。 6. **其他控制要素**: - EPR(电子气门定时器)中的芯片接收来自ECM的指令,并通过内部传感器监测实际压差,驱动电机调节膜片和杠杆,维持所需的燃料压力差。 - ECM监控排气中的氧浓度,通过调整天然气供应,确保空燃比准确,达到发动机性能优化。 玉柴CNG单燃料发动机依靠先进的电控技术,通过精密的高压减压、调压、燃烧管理和反馈机制,实现了在不同工况下的高效、稳定运行,充分体现了现代发动机技术对于清洁能源应用的掌控能力。

feScore - EPA Fuel Economy Score (负1 = Not available) fuelCost08 - annual fuel cost for fuelType1 ($) (7) fuelCostA08 - annual fuel cost for fuelType2 ($) (7) fuelType - fuel type with fuelType1 and fuelType2 (if applicable) fuelType1 - fuel type 1. For single fuel vehicles, this will be the only fuel. For dual fuel vehicles, this will be the conventional fuel. fuelType2 - fuel type 2. For dual fuel vehicles, this will be the alternative fuel (e.g. E85, Electricity, CNG, LPG). For single fuel vehicles, this field is not used ghgScore - EPA GHG score (负1 = Not available) ghgScoreA - EPA GHG score for dual fuel vehicle running on the alternative fuel (负1 = Not available) guzzler- if G or T, this vehicle is subject to the gas guzzler tax highway08 - highway MPG for fuelType1 (2) highway08U - unrounded highway MPG for fuelType1 (2), (3) highwayA08 - highway MPG for fuelType2 (2) highwayA08U - unrounded highway MPG for fuelType2 (2),(3) highwayCD - highway gasoline consumption (gallons/100miles) in charge depleting mode (4) highwayE - highway electricity consumption in kwhrs/100 miles highwayUF - EPA highway utility factor (share of electricity) for PHEV hlv - hatchback luggage volume (cubic feet) (8) hpv - hatchback passenger volume (cubic feet) (8) id - vehicle record id lv2 - 2 door luggage volume (cubic feet) (8) lv4 - 4 door luggage volume (cubic feet) (8) make - manufacturer (division) mfrCode - 3character manufacturer code model - model name (carline) mpgData - has Your MPG data; see yourMpgVehicle and yourMpgDriverVehicle phevBlended - if true, this vehicle operates on a blend of gasoline and electricity in charge depleting mode pv2 - 2door passenger volume (cubic feet) (8) pv4 - 4door passenger volume (cubic feet) (8) rangeA - EPA range for fuelType2 rangeCityA - EPA city range for fuelType2 rangeHwyA - EPA highway range for fuelType2 trans_dscr - transmission descriptor; see http://www.fueleconomy.gov/feg/findacarhelp.shtml#trany trany - transmission UCity - unadjusted city MPG for fuelType1; see the description of the EPA test procedures UCityA - unadjusted city MPG for fuelType2; see the description of the EPA test procedures UHighway - unadjusted highway MPG for fuelType1; see the description of the EPA test procedures UHighwayA - unadjusted highway MPG for fuelType2; see the description of the EPA test procedures VClass - EPA vehicle size class year - model year youSaveSpend - you save/spend over 5 years compared to an average car ($). Savings are positive; a greater amount spent yields a negative number. For dual fuel vehicles, this is the cost savings for gasoline. sCharger - if S, this vehicle is supercharged tCharger - if T, this vehicle is turbocharged翻译

2023-07-17 上传