Honda 3.0 Liter, New V6 Engine

Fukuo, Koichi; Iwata, Takeshi; Sakamoto, Yasuhide; Imai, Yoshihiro; Nakahara, Kazuhiro; Lantz, Kenneth A.

doi:10.4271/970916

Cited by 24 publications

(4 citation statements)

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“…Most of this research has been driven by the automotive industry. Among the first developed arrangements are the cam phasers, often combined with profile switching systems, 15–17 in order to obtain some flexibility for both timing and lift variation demands. This technique is currently applied in more than one production engine.…”

Section: State Of Art Reviewmentioning

confidence: 99%

Required time response of a variable valve actuator equiping a hybrid pneumatic–combustion engine

Basbous

Younès

Ilinca

et al. 2012

International Journal of Engine Research

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This work is a part of a research program that aims to modify a conventional internal combustion engine and turn it into a hybrid pneumatic–combustion engine. The hybrid pneumatic–combustion engine should be able to convert mechanical energy into compressed air and convert compressed air back into mechanical energy. The potential application for the concept is any use of the internal combustion engine where the load oscillates between a negative and a positive value, such as automobiles and hybrid wind diesel systems for remote area power generation. In the first application, during vehicle decelerations, an excess of power occurs, and a negative load could be applied to the engine, whereas during vehicle accelerations, a positive load is applied. In the second application, if the generated wind power is higher than consumption demand, then the load applied to the engine could be negative, and if the generated wind power is lower than consumption demand, then the load is positive. In previous work, we exposed an optimization followed by a fuel-saving evaluation of a new hybrid pneumatic–combustion engine concept that uses a variable valve actuator system. The optimization of the valve actuation was based on ideal thermodynamic cycle modeling, assuming therefore an instant response of the variable valve actuator system. In the present work, a more realistic analysis of the system is provided by taking into consideration the dynamic response of the variable valve actuator system. Variable valve actuators have been widely studied for optimizing performance and fuel consumption of the internal combustion engine, especially in spark-ignition engines. For these engines, it is possible to reduce the pumping losses and to optimize the engine filling by controlling the intake and exhaust valve opening and closing angles, as well as their lifts. However, the variation of valve actuation crank angles required in a conventional internal combustion engine is significantly smaller than the one required in the hybrid pneumatic–combustion engine. This paper describes, through simulation, how the valve time response affects the performance of the hybrid pneumatic–combustion engine and recommends a required valve time response.

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Section: State Of Art Reviewmentioning

confidence: 99%

Required time response of a variable valve actuator equiping a hybrid pneumatic–combustion engine

Basbous

Younès

Ilinca

et al. 2012

International Journal of Engine Research

View full text Add to dashboard Cite

show abstract

“…Initially, valve actuation systems were only used to control the intake and/or exhaust valve phasing (valve variable timing (VVT)) [1][2][3] or to realize different cam profiles according to the engine speed. 4,5 Most recent systems are able to independently define valve opening, closing and maximum lift (variable valve actuation (VVA)). 6,7 This flexibility allows to adjust the engine load with a limited throttle closure, 8,9 which significantly reduces the pumping work at low/ medium load.…”

Section: Introductionmentioning

confidence: 99%

A numerical procedure for the calibration of a turbocharged spark-ignition variable valve actuation engine at part load

Bozza

Bellis

Teodosio

2016

International Journal of Engine Research

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Referring to spark-ignition engines, the downsizing, coupled to turbocharging and variable valve actuation systems are very common solutions to reduce the brake-specific fuel consumption at low-medium brake mean effective pressure. However, the adoption of such solutions increases the complexity of engine control and management because of the additional degrees of freedom, and hence results in a longer calibration time and higher experimental efforts. In this work, a twin-cylinder turbocharged variable valve actuation spark-ignition engine is numerically investigated by a one-dimensional model (GT-Power™). The considered engine is equipped with a fully flexible variable valve actuation system, realizing both a common full-lift strategy and a more advanced early intake valve closure strategy. Refined sub-models are used to describe turbulence and combustion processes. In the first stage, one-dimensional engine model is validated against the experimental data at full and part load. The validated model is then integrated in a multipurpose commercial optimizer (modeFRONTIER™) with the aim to identify the engine calibration that minimizes brake-specific fuel consumption at part load. In particular, the decision parameters of the optimization process are the early intake valve closure angle, the throttle valve opening, the turbocharger setting and the spark timing. Proper constraints are posed for intake pressure in order to limit the gas-dynamic noise radiated at the intake mouth. The adopted optimization approach shows the capability to reproduce with good accuracy the experimentally identified calibration. The latter corresponds to the numerically derived Pareto frontier in brake mean effective pressure–brake specific fuel consumption plane. The optimization also underlines the advantages of an engine calibration based on a combination of early intake valve closure strategy and intake throttling rather than a purely throttle-based calibration. The developed automatic procedure allows for a ‘virtual’ calibration of the considered engine on completely theoretical basis and proves to be very helpful in reducing the experimental costs and the engine time-to-market.

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“…[1][2][3][4][5][6][7][8] Both the results of experimental tests and the performance of the modern automotive engines on which they are currently employed show the good perspectives of the implementation of different strategies reachable by the use of VVA systems. [9][10][11][12][13][14] The main strategies currently used in automotive field are timing variation, duration variation, maximum lift variation, combined but not independent variation of timing, duration, and lift. 2,3 Timing variation is the rigid translation of the valve-lift curve.…”

Section: Introductionmentioning

confidence: 99%

New mechanical variable valve actuation systems for motorcycle engines

Abagnale

Migliaccio

Pennacchia

2014

Proceedings of the Institution of Mechanical Engineers, Part C:

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This paper summarizes the results of the design of new mechanical variable valve actuation systems, developed for highperformance motorcycle engines, at University of Napoli Federico II, Department of Industrial Engineering -Section Mechanics and Energy. After a synthetic recapitulation of the main variable valve-actuation methods and of the main beneficial effects on performance, emissions, and consumptions of the modern automotive engines on which they are currently employed, the paper presents the results of our mechanical variable valve actuation systems, born to be applied on a MotoMorini engine, as required by the company. The paper starts with the description of a first study concerning a very simple system, used just to set up a model to be used for further and more complex activities. The study has been conducted implementing a numerical procedure specifically designed to determine cam profile and kinematic and dynamic characteristics of the whole system, starting from some input data (as described later). The model has been validated against the conventional timing system using kinematic simulations. The work has evolved through three main steps leading to three types of variable valve actuation systems, all mechanical systems (as defined in literature and described later). Results of the numerical procedure verify the validity of the variable valve actuation systems, and particularly, the last one shows a complete performance in terms of lift, duration, and timing variation of valve-lift law. This paper reports results reachable with these simple systems that give good perspectives of use for a new two-wheel vehicle engine.

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Honda 3.0 Liter, New V6 Engine

Cited by 24 publications

References 0 publications

Required time response of a variable valve actuator equiping a hybrid pneumatic–combustion engine

Required time response of a variable valve actuator equiping a hybrid pneumatic–combustion engine

A numerical procedure for the calibration of a turbocharged spark-ignition variable valve actuation engine at part load

New mechanical variable valve actuation systems for motorcycle engines

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