| 步晨嘉,刘忠民,高建成.乘用车汽油机机油泵循环工况节能潜力试验研究[J].内燃机工程,2020,41(5):77-83. |
| 乘用车汽油机机油泵循环工况节能潜力试验研究 |
| Experiment of Oil Pump Energy Saving Potential in Passenger Car Driving Cycles |
| DOI：10.13949/j.cnki.nrjgc.2020.05.011 |
| 关键词:乘用车 循环工况 机油泵 节能 |
| Key Words:passenger car driving cycles oil pump energy saving |
| 基金项目:浙江省自然科学基金项目（Y1111044） |
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| 摘要:针对乘用车发动机在循环工况条件下机油泵与润滑系统匹配设计问题，建立机油泵循环工况试验系统，测量循环工况条件下机油泵性能，分析发动机润滑压力与流量要求，提出基于循环工况的发动机加速过程润滑压力与流量安全余量要求，以安全余量为基准评价机油泵节能区域与潜力。研究表明，在新欧洲驾驶循环(new European driving cycle, NEDC)工况下，与市区工况相比，郊区工况发动机转速提高，加速时间增加，对润滑安全余量要求更高；在发动机标定转矩至标定功率转速范围内，发动机润滑需求增加速度低于机油泵供油量增加速度，是最有节能潜力的区域；循环工况条件和润滑油温度条件对机油泵驱动功率具有重要影响；机油泵在NEDC市区工况具有32.1%节能潜力，在郊区工况具有8.9%节能潜力。 |
| Abstract:In order to study the matching of oil pump and lubricating system in driving cycles of a passage car, an oil bump testing system was set up. The performance of the oil pump in driving circles was tested, and the lubricating pressure and flow requirements were comparatively analyzed. The safe margins of oil pressure and flow during engine acceleration were deduced, and the oil pump driving energy saving potential based on the safe margins was proposed. The results showed that there was more acceleration in the extra urban cycle than in the urban cycle of the new European driving cycle(NEDC), requiring much more lubrication. The amount of demanded lubricating oil was less than what was supplied by the oil pump in the range between the peak torque and rated power, indicating the range was the most potential in energy saving. The driving condition had a great effect on the oil pump driving power. The excessive hydraulic power provided by the oil pump was approximately proportional to the engine speed in the range over piston spay cooling speed. The oil pump driving energy could be reduced by 8.9% by a fully variable displacement oil pump in the extra urban driving cycle, and by 32.1% in the urban driving cycle. |
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