Motronic MED7 for Gasoline Direct Injection Engines: Engine Management System and Calibration Procedures

Küsell, Matthias; Moser, Winfried; Philipp, Matthias

doi:10.4271/1999-01-1284

Cited by 24 publications

(10 citation statements)

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“…In experiments aimed for investigating lean burn, the engine speed was kept at 4000 rpm and load was in a medium range (IMEP 6.5 ∼ -9 Bar). Higher engine speed and load conditions may lead to unstable engine operation in lean burn as found by Küsell et al [37]. Conditions with EERs of 24% and 48% were tested.…”

Section: Effect Of Injection Timing On Lean Combustionmentioning

confidence: 99%

Effects of direct injection timing of ethanol fuel on engine knock and lean burn in a port injection gasoline engine

Zhuang

Hong

2014

Fuel

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Improving engine efficiency and reducing its emissions are the major tasks of recent development in internal combustion technology [1]. This is driven by the society concerns about the global warming and the depletion in supply of fossil fuels. One of the feasible short-to-midterm solutions for addressing the concerns is to use renewable fuels such as ethanol. Many countries and areas have enacted legislations [2] or incentive policies to promote the use of ethanol and other bio/renewable fuels [3,4]. The use of ethanol and other bio/renewable fuels has brought new challenges to automotive sector to develop new technologies. Ethanol direct injection plus gasoline port injection (EDI + GPI) is one of the new technologies in recent development.Previous studies on SI engines found that using ethanol fuel could help to reduce unburned emissions such as carbon monoxide (CO) and hydrocarbon (HC) [5][6][7], enhance engine anti-knock ability [8,9], and improve lean burn performance [10,11]. In the current applications, ethanol is externally blended with gasoline at a specific ratio. The applications of this method decreased pollutant emissions and increased engine efficiency in certain engine conditions [12,13]. However, the vehicles may face problems of reduced vehicle coverage, difficult cold start [14], corrosion and reduced lubrication [15]. Moreover, due to the fixed ethanol/gasoline ratio, the ethanol's potential in reducing engine emissions and improving thermal efficiency cannot be fully exploited. Research has already shown that the optimal ethanol/gasoline ratio for maximizing engine efficiency and minimizing emissions was varied with the engine operation condition [6,7]. EDI + GPI dual-fuel injection, on the other hand, provides an opportunity to solve the problems and meet the requirements. It offers greater flexibility of using ethanol fuel because the ethanol and gasoline mixing ratio can be instantly altered according to the engine operation Effects of direct injection timing of ethanol fuel on engine knock and lean burn in a port injection gasoline engine AbstractEthanol is a promising alternative fuel for internal combustion engines due to its renewable feature. To make the use of ethanol fuel more effective and efficient, ethanol direct injection plus gasoline port injection (EDI + GPI) has been investigated in recent years. By directly injecting ethanol into the engine, the advantages of ethanol fuel such as high latent heat of vaporization, fast laminar flame speed, wide flammability and better low temperature combustion stability can be well utilized to enhance engine anti-knock ability and improve lean burn performance. For an engine equipped with direct injection (DI) system, start of injection (SOI) timing is an important control parameter which directly affects the engine performance. This paper reports the investigation to the effect of ethanol fuel SOI timing on knock mitigation and lean burn. Experiments were conducted on a 250 cc single cylinder spark ignition (SI) engine equipped with EDI ...

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Section: Effect Of Injection Timing On Lean Combustionmentioning

confidence: 99%

Effects of direct injection timing of ethanol fuel on engine knock and lean burn in a port injection gasoline engine

Zhuang

Hong

2014

Fuel

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“…For this purpose, the engine switches briefly to rich homogeneous operation (λ < 0.8) to reduce NO X to nitrogen with the rich gas components H 2 and CO mainly, (Fig. 4) without emitting CO and HC in the process [1][2][3].…”

Section: No X Storage Catalystsmentioning

confidence: 99%

Engines and exhaust after treatment systems for future automotive applications

Alkemade¹,

Schümann²

2006

Solid State Ionics

115

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“…Coefficients ai are mainly influenced by engine load, crankshaft speed, ignition advance angle and air/fuel ratio, so we can assume a1 =fa(PIM, )o,;Adv) (2)(3)(4)(5). Where PIM is the manifold pressure, a) is the crankshaft angle speed, 2 is the equivalent air/fuel ratio coefficient, Adv is the ignition advance angle.…”

Section: Introductionmentioning

confidence: 99%

“…This is functional map of ai when the 2 is 1gimit. (2)(3)(4)(5)(6) and (2-7) denote open loop off-line estimations of ai . During the engine operating process, ai must be adapted in real time based on the engine speed ( Ne ) and the engine load ( Load ), the adaptation algorithm is shown in (2)(3)(4)(5)(6)(7)(8).…”

Section: Introductionmentioning

confidence: 99%

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The Lean Burn Control for LPG Engine Using Torque Estimation

Xiao

Luo

2007

2007 IEEE International Conference on Control and Automation

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Because of exhaust emission and fuel consumption request, ECU of modern gas engines usually use lean burn control techniques. Most of the engine lean burn control systems are based on linear oxygen sensor to measure air/fuel ratio. In this paper, a low-cost torque estimation for LPG engine control system has been developed. Lambda oxygen sensor is used instead of linear oxygen sensor. Algorithms suitable for real-time computation are employed for engine indicated torque estimation. The indicated torque is used as feedback variable for electronic throttle valve control, and used as feedforward compensation for fuel control. Although there is no linear oxygen sensor to measure air/fuel ratio, the LPG engines can be controlled to stable lean burn state, and satisfy output power, less fuel consumption and lower emission requirement simultaneously.

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Motronic MED7 for Gasoline Direct Injection Engines: Engine Management System and Calibration Procedures

Cited by 24 publications

References 1 publication

Effects of direct injection timing of ethanol fuel on engine knock and lean burn in a port injection gasoline engine

Effects of direct injection timing of ethanol fuel on engine knock and lean burn in a port injection gasoline engine

Engines and exhaust after treatment systems for future automotive applications

The Lean Burn Control for LPG Engine Using Torque Estimation

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