Turbo-Discharging: Reducing CO2 Emissions from Current and Future Vehicles

涡轮放电：减少当前和未来车辆的二氧化碳排放

• 批准号: EP/H050353/1
• 负责人: Colin Garner
• 金额: $ 15.42万
• 依托单位: Loughborough University
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2010
• 资助国家: 英国
• 起止时间: 2010 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FH050353%2F1
• 关键词: Turbo; Discharging; Reducing; CO2; Emissions

Turbo-Discharging is a fundamentally new approach to using internal combustion (IC) engine air systems to improve fuel economy, reduce engine CO2 emissions and simultaneously increase engine torque. Using a novel divided exhaust flow arrangement, the blow-down flow and the associated energy usually lost as part of the exhaust flow is recovered by a turbine. During the main displacement flow the turbine is by-passed and the crankshaft does not have to do any work exhausting the burnt gases through the turbine. The result is the recovery of the blowdown energy without negatively impacting the engine crankshaft torque. This energy is then innovatively used to depressurise the exhaust system which generates extra crankshaft torque during the exhaust stroke giving a primary torque increase and CO2 emission reduction.Secondary benefits include increased energy availability from the blowdown pulse and potentially improved low speed torque (through increased pressure drop across the turbine). There will be less hot exhaust gas residuals within the cylinder which will extend the knock limit of turbocharged spark ignition engines allowing further downsizing than is currently possible.Importantly, the effect on the combustion system is negligible allowing the Turbo-Discharging approach to be used with all current and future IC engines without significant redesign. The impact on CO2 emissions could therefore be much larger than costly technologies offering larger CO2 reductions in only small niche markets.Turbo-Discharging requires the addition of a turbine and compressor (as used in a conventional turbocharging system) and does not require complexities such as wastegating or variable geometry turbines. The cost is therefore small, placing the technology in a very competitive position compared with many other CO2 reducing technologies. With engine manufacturers requiring combined technologies to meet future CO2 emission targets, this technology will be very attractive to industry. Initial contact with industrial has shown that experimental demonstration of this technology is needed before they will invest. This project will experimentally study, develop and demonstrate Turbo-Discharging as a feasible, cost effective and novel approach to reducing IC engine CO2 emissions, ultimately leading to industrial collaboration and implementation of Turbo-Discharging on-vehicle.

涡轮排气是一种全新的方法，使用内燃机（IC）空气系统来提高燃油经济性，减少发动机二氧化碳排放，同时增加发动机扭矩。使用新颖的分流排气流布置，通常作为排气流的一部分损失的泄放流和相关能量由涡轮机回收。在主排量流期间，涡轮机被旁通，并且曲轴不必做任何功，通过涡轮机排出燃烧气体。结果是在不负面影响发动机曲轴扭矩的情况下回收泄放能量。这些能量被创新性地用于降低排气系统的压力，从而在排气冲程期间产生额外的曲轴扭矩，从而增加主要扭矩并减少CO2排放。第二个好处包括增加了来自泄放脉冲的能量可用性，并可能改善低速扭矩（通过增加涡轮机的压降）。汽缸内的热废气残余物将减少，这将延长涡轮增压火花点火发动机的爆震极限，从而允许比目前可能的尺寸进一步减小。重要的是，对燃烧系统的影响可以忽略不计，从而允许涡轮放电方法用于所有当前和未来的IC发动机，而无需进行重大的重新设计。因此，对CO2排放的影响可能比仅在小的利基市场中提供更大CO2减排量的昂贵技术大得多。涡轮排放需要添加涡轮机和压缩机（如传统涡轮增压系统中所使用的），并且不需要复杂的废气门或可变几何涡轮机。因此，成本很低，与许多其他二氧化碳减排技术相比，该技术处于非常有竞争力的地位。由于发动机制造商需要综合技术来满足未来的CO2排放目标，因此这项技术对工业非常有吸引力。与工业界的初步接触表明，在他们投资之前，需要对这项技术进行实验演示。该项目将通过实验研究，开发和展示涡轮放电作为一种可行的，具有成本效益的和新颖的方法来减少内燃机二氧化碳排放，最终导致工业合作和涡轮放电车载实施。

项目成果

Turbo-discharging turbocharged internal combustion engines

涡轮增压内燃机

• DOI: 10.1177/0954407012455986
• 发表时间: 2012
• 期刊: Journal of Automobile Engineering
• 作者: Williams A

Turbo-Discharging: Predicted Improvements in Engine Fuel Economy and Performance

涡轮增压：预计发动机燃油经济性和性能的改进

• DOI: 10.4271/2011-01-0371
• 发表时间: 2011
• 作者: Williams A

Inlet Condition Dependency of Centrifugal Compressor Mapped Efficiency

离心压缩机映射效率的入口条件依赖性

• DOI: 10.4271/2014-01-2854
• 发表时间: 2014
• 作者: Park I