Comparative Analysis of Combustion Noise, Performance and Emission of LTC Diesel Engine with Multiple Injections

Biswas, Sanjoy; Mukhopadhyay, Achintya

doi:10.1007/978-981-15-7711-6_65

Cited by 3 publications

(8 citation statements)

References 28 publications

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“…The results of these effects are low combustion temperature and decrease NOx formation. 29 The increase in FIP quantity during pilot duration slightly increases the rate of NOx formation, but this rate of NOx formation suddenly increases for 45°CA SOPI.…”

Section: Nitrogen Oxides (Nox)mentioning

confidence: 96%

“…An increase in the mean effective pressure was significant as it can increase the brake power as well as thermal efficiency. 29 The following expressions ( 2) and ( 3) give the fuel injection rate and mass of fuel injected through a nozzle, respectively 18…”

Section: In-cylinder Pressurementioning

confidence: 99%

“…Such a retarded SOMI leads to a low mean gas temperature. 29 On the other hand, fuel injected with too advanced SOPI timing makes the combustion happen away from the top dead center. Such a type of combustion also decreases the MGT.…”

Section: Mean Gas Temperaturementioning

confidence: 99%

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Effect of injection system parameters on overall performance of a small diesel engine

Dond¹,

Gulhane²

2021

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Limited fuel capacity and pollution are major concerns in the automobile industry. The combustion, performance, and emission characteristics are important considering the engine's overall performance. In the present paper, an experimental investigation was carried out on a small diesel engine to analyze the effect of injection system parameters on all measurable characteristics. The conventional diesel engine injection system was retrofitted with a common rail diesel injection (CRDI) system. The injection system parameters such as injection pressure, start of pilot injection timing, the start of main injection timing, and quantity of fuel injection percentage during the pilot and the main injection period were considered in the study. With the use of the CRDI system, it was observed that mean effective pressure and cylinder pressure were increased compared to the conventional diesel engine. There was a decrease in the peak value of the HRR and RoPR curve and simultaneously an increase in the width of the curve. MGT inside the combustion cylinder was also decreased. The retrofitted CRDI system shows higher thermal efficiency with good fuel economy as well as found a considerable reduction in carbon monoxide (CO) and smoke percentage. Overall, the considered injection system parameters deliver a significant improvement to the overall attributes of the small diesel engine.

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Section: Nitrogen Oxides (Nox)mentioning

confidence: 96%

Section: In-cylinder Pressurementioning

confidence: 99%

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Effect of injection system parameters on overall performance of a small diesel engine

Dond¹,

Gulhane²

2021

Heat Trans

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“…On the other hand [12][13][14], the predictive model was developed based on quasi-dimensional (1D) or phenomenological and multi-dimensional (i.e., CFD) approach and validated for combustion and emissions of DI diesel engine with single and multiple injections (double, triple). A recent study [15][16][17][18] assessed the impact of multiple injections on the performance, CN, and emission characteristics of the modern diesel engine. The selective outcomes of these studies have been discussed subsequently.…”

Section: Introductionmentioning

confidence: 99%

“…In a previous study [17], the impact of epMa injection was assessed with respect to the performance, emissions and CN level of CRDI engine with variables, such as variable main injection timing and eight different speeds and loads, for better and smoother torque, BSFC and reduced CN than baseline pMa-E. In another study [18], the superiority of epMa injection over triple (pMa) and double (pM) injections was assessed with respect to noise, performance and emissions level with fixed main injection time.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Quadruple Injection Strategy Over Triple Injections to Improve Emissions, Performance and Noise of the Automotive Diesel Engine

Biswas

Mukhopadhyay

2022

FU Mech Eng

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The present study aims at investigating effectiveness of the quadruple (early-pilot-main-after [epMa]) injection strategy over three different triple [early-main-after (eMa), early-pilot-main (epM) and pilot-main-after (pMa)] injection scheduling in terms of emissions, performance [brake specific fuel consumption (BSFC), torque, brake thermal efficiency (BTE) and fuel economy] and noise. The experimentation was carried out on a heavy-duty BS-IV diesel engine with 45% EGR fraction and fixed main injection (Crank-angle) scheduling at eight different RPMs and three loads of engine (20%, 60% and 100%) using design of experiments(DOE). This comprehensive study showed that the quadruple injection strategy provides optimum results in both performance and emissions compared to the promising three triple injection strategy. The quadruple injection strategy exhibits the best BTE at all operating conditions and best BSFC at medium to high-speed zone around 0.5–1% inline to reduce combustion noise (CN) level, especially at low speeds and low to medium load of 0.2–2.2 dBA. Among triple injections, the pMa shows the best performance in BSFC, BTE, smoke and THC emissions. The epM is the best in the CO emissions and torque performance in the low-speed zone. Smoke value is marginally higher for the epMa at low to medium speed than the pMa, although average smoke emissions were the best. Taken together, the overall PM emission level was marginally better than Triple Injections, due to the impact of double pilots in combination with post-injection. In addition, NOx emissions were improved (around 3–6%) significantly with quadruple than with triple injections. The epMa injection scheduling also showed improvement in constant speed fuel economy and in pass-by-noise at the vehicle.

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Emission and performance characteristics of CRDI diesel engine using Quadruple injection strategy with different pilots and post injection timing

Biswas

Mukhopadhyay

2021

Eng. Res. Express

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Multiple injections in association with suitable (High/heavy) exhaust gas recirculation (EGR) is a promising technique to achieve low temperature combustion (LTC) regime in modern CRDI (common rail direct injection) diesel engine. This helps for simultaneous reduction of NOx and Soot to meet the stringent emission norms without penalizing the fuel efficiency and overcome the drawbacks of EGR-LTC. There are limited insights available which discuss about the potentiality of latest Quadruple injection (early-pilot-main-post/after; epMa) strategy in combination with high EGR and different injection timing over triple injections (pilot-main-after; pMa) at wide operating conditions. This paper deals with the study on the effect of Quadruple injection (epMa) startegy on performance, emissions and noise with different Pilot injection timing and post injection dwell combinations (8 Nos) on a CRDI diesel engine with high EGR and fixed main injection schedule at 4 operating loads and 5 speeds. The study shows that Quadruple injection strategy with retarded early and advanced pilot (early 35°and pilot 19°CA BTDC) and advanced post injection dwell timing 1100 ms is superior in providing optimum results in emissions (NOx, PM, THC, CO) and combustion noise (CN)[1.55-2 dBA @Rig level and 0.7 dBA @ Vehicle level Pass by Noise (PBN)]. This gives the best results in brake specific fuel consumption (BSFC)[0.2 to 1.31%], Torque and brake thermal efficiency (BTE) performance w.r.t other combinations and base triple injections (pMa). In contrary, the quadruple injection strategy having advanced double pilots with delayed post injection dwell (early-39°, Pilot-19°CA BTDC and DtA 1300 ms); shows the best CN reduction. Best smoke results found with the combination of retarded pilots and advanced post injection dwell. This study shows the importance of injection timing specially the twin pilots (early, pilot) along with post injection dwell. Furthermore, it indicates the potentiality of newest Quadruple injection strategy over triple injection.

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Comparative Analysis of Combustion Noise, Performance and Emission of LTC Diesel Engine with Multiple Injections

Cited by 3 publications

References 28 publications

Effect of injection system parameters on overall performance of a small diesel engine

Effect of injection system parameters on overall performance of a small diesel engine

Assessment of the Quadruple Injection Strategy Over Triple Injections to Improve Emissions, Performance and Noise of the Automotive Diesel Engine

Emission and performance characteristics of CRDI diesel engine using Quadruple injection strategy with different pilots and post injection timing

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