Dynamic Skip Fire
DSF® 技术可以使乘用车的效率提高5-15%
如何动态跳火(DSF)®) works
DSF skips or fires individual cylinders dynamically on an event-by-event basis to meet the requested torque from an engine. Through careful control of the number and sequence of combustion events using patented algorithms, 发动机在接近最高效率时运转, 创建一个软件控制的可变排量引擎. Tula’s algorithms avoid noise and vibration generation to give drivers expected levels of refinement under all driving conditions.
DSF® 在现实世界中
当需要高扭矩时，DSF® 激活所有气缸.
随着扭矩需求的缓和，气缸根据需求动态跳过.
At slower speeds, 通过跳过更多的气缸来保持最大的燃油效率, 甚至在减速时跳过所有气缸.
DSF是如何实现的
发动机控制模块软件
气瓶停用硬件
森林舞会游戏的DSF适用于大多数停用阀机构
DSF依赖于单个汽缸的停用. Each cylinder fire or skip needs to be controlled by deactivation capable intake and exhaust valves.
阀门的停用可以通过液压或机电方式实现.
DSF has an excellent value proposition as evidenced by more than two million vehicles with DSF on the road today
森林舞会游戏开发了一项“关键技术”
达到燃油效率的要求。”
点击了解更多关于森林舞会游戏和我们致力于更清洁的地球
柴油机动态箕斗火灾
Dynamic Skip Fire for Diesel Engines (dDSF™) enables diesel engines to be both clean and green
如何柴油机动态跳火(dDSF)™) works
Tula’s dDSF technology carefully controls the number and sequence of combustion events in a diesel engine using patented algorithms to ensure the engine operates near peak efficiency. 由于较高的气缸负载, dDSF also increases exhaust gas temperatures to continue keeping the aftertreatment system at operating temperature, 特别是在低负荷条件下.
dDSF™ 在现实世界中
当需要高扭矩时，dDSFTM 激活所有气缸.
随着扭矩需求的缓和，气缸根据需求动态跳过.
At slower speeds, 通过跳过更多的气缸来保持最大的燃油效率, 甚至在减速时跳过所有气缸.
Simultaneous CO2 and NOx 最佳燃烧带来的好处
以及更高的转换效率
Engine Controls
Temperatures
and NOx Reduction
Optimal Combustion
Reduced CO2
dDSF improves fuel efficiency by firing all events at the most efficient air to fuel ratio, 允许在所有发动机输出水平的最佳燃烧.
转换效率
Reduced NOX
Cylinder deactivation reduces excess engine airflow and increases exhaust temperatures. This allows for more efficient conversion of pollutants in the catalyst and reduced NOx -在相同的后处理系统成本.
测试结果显示74% NOx and 5% CO2 reduction
所显示的结果被映射为适当的射击密度. The improvement in turbine outlet temperature is dramatic, allowing effective aftertreament control.
柴油机气门机构停用机械化
Deactivation
Finger Follower
Deactivation
Rocker Arm
Deactivation
Pushrod Cartridge
Deactivation
Valve Bridge
Deactivation
Roller Lifter
Global regulations are becoming increasingly stringent for heavy-duty diesel NOX and CO2 emissions. dDSF同时降低NOX and CO2 低成本排放.
森林舞会游戏开发了一项关键技术
为了达到燃油效率的要求
点击了解更多关于森林舞会游戏和我们致力于更清洁的地球
Hybrid++
How Hybrid++ works
HYBRID++是一个简化的, 专利的全缸失活控制技术, that is applicable to P0 or P1 Mild Hybrid Vehicles to achieve synergistic fuel efficiency gains and significant toxic emissions reductions.
HYBRID++™ 在现实世界中
All cylinders fire during highway merging and the hybrid motor provides torque assist.
During low-speed cruise, the electric motor can propel the vehicle with all cylinders deactivated
Lifting off the accelerator pedal causes all cylinders to deactivate and enables more recuperation. 没有空气被抽进排气口.
Hybrid++消除了海岸和超限条件下的泵送损失. 因为熄火时空气不会被抽进排气口, Hybrid++ also significantly reduces the harmful emissions that otherwise come from purging the catalyst
CO2 reduction
森林舞会游戏对动态跳跃火的研究成果
用于混合动力系统
点击了解更多关于森林舞会游戏和我们致力于更清洁的地球
DSF和48V轻度混合动力协同作用，以更低的成本实现更好的燃油经济性
How eDSF works
eDSF synergystically combines cylinder deactivation with vehicle electrification to increase the operating range of DSF. 通过在适当的火灾和跳跃中用电机扭矩抵消发动机扭矩, eDSF使DSF飞行区域的操作和扩展更加平稳.
eDSF™ 在现实世界中
公路巡航时, the motor torque supplements the engine enabling it to fire on fewer cylinders
在低至中等负载, the expanded operating range due to torque smoothing and torque assist enables smooth and efficient eDSF operation.
Enhanced Energy Recovery: eDSF shuts off all cylinders (called DCCO for Deceleration Cut Off) allowing hybrid systems to fully capture kinetic energy through regeneration without engine braking loss.
电气化使扭矩更平稳
eDSF uses the existing hybrid motor to smooth torque pulses of skip fire operation
DSF工作范围增大
Electric motor torque smoothing and torque assist extend the range of useful firing densities.
将扭矩辅助组合成DSF, increased regeneration and torque smoothing enables eDSF to deliver gains beyond what DSF and mild-hybrid could individually provide. eDSF是一个真正的整体，大于其各部分的总和.
先进的技术
DSF works synergistically with multiple advanced engine and vehicle technologies such as Miller-cycle and Atkinson-cycle engines, compressed natural gas and other alternative fuels as well as connected and autonomous vehicles.
先进的燃烧
米勒循环发动机具有燃油经济性的前景, 但在独立的基础上，受到效率和性能权衡的限制
DSF® works synergistically with this advanced engine combustion strategy to strengthen its advantages while addressing its challenges.
mDSF more than doubles the fuel efficiency improvement of Miller-cycle engines on a stand-alone basis, 同时降低了百分之百的成本改进.
How mDSF works
mDSF couples DSF with Miller-cycle engines to further increase each cylinder’s firing options with high-fire, low-fire and skip to match torque demand always at optimum efficiency without sacrificing drivability.
Dynamic charge management using mDSF has synergistic benefits beyond those provided by DSF and Miller-cycle engines individually.
CO2 reduction
toxic emissions
噪音，振动，粗糙
森林舞会游戏的研究和发展出版物
使用DSF的高级应用程序®
点击了解更多关于森林舞会游戏和我们致力于更清洁的地球
就在几年前，无人驾驶汽车还被认为是科幻小说
如今，自动驾驶汽车是一项快速发展的技术. These vehicles are designed to be wirelessly connected to each other and the cloud infrastructure, 向发动机控制器提供有关车辆位置的可操作信息, traffic, terrain, obstacles, 交通灯变化, and more.
DSF如何与Autonomous协同工作
The blue curve in the graph illustrates a typical drive cycle of rapid accelerations, slowdowns, braking and stops. The orange curve is for an autonomous vehicle that anticipates traffic signals and other obstacles.
aDSF delivers significant fuel efficiency gains by not only optimizing for the autonomous drive cycle but also optimizing the drive cycle itself. Moreover, 自动驾驶汽车可以在不同时间完全无人驾驶, 不受噪音限制, 振动和粗糙问题, 从而进一步提高aDSF效率.
CO2 reduction
Drive Cycle
ARPA-E NEXTCAR项目
互联和自动驾驶汽车协作
森林舞会游戏的研究和发展出版物
使用Autonomous的高级应用程序
点击了解更多关于森林舞会游戏和我们致力于更清洁的地球
Alternative Fuels
Tula’s DSF control strategies can be applied to engines designed to use alternative fuels, 既能提高动力系统效率，又能减少有害气体排放
According to U.S. 能源情报署, alternative fuels are projected to grow much faster than petroleum in the transportation sector. 汽油用DSF, diesel, 以及替代燃料, 加上电动汽车的DMD技术, Tula is poised to further improve emission and cost benefits for decades into the future.
Transportation sector consumption of minor petroleum 以及替代燃料 (AEO2020 Reference case) quadrillion British thermal units
