Automotive emissions control

Buckland, Julia; Cook, J.A.

doi:10.1109/acc.2005.1470478

Cited by 9 publications

(4 citation statements)

References 29 publications

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“…The measurements are based on inlet air flow or intake manifold pressure, and injected into the intake port of each cylinder upstream of the intake valve. Emission control relies primarily on a three way catalyst system to convert the HC, CO2, CO and NOX emissions in the exhaust [6]. Figure 1 illustrates that high simultaneous conversion efficiencies for the three species occur only in a narrow band around stoichiometry, emphasizing the criticality of minimizing tailpipe emissions.…”

Section: A Gasoline Engine Controllermentioning

confidence: 98%

Design of power controller for hybrid vehicle

Chin

Jafari

2010

2010 42nd Southeastern Symposium on System Theory (SSST 2010)

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In this paper a new solution for the design of a control system of a hybrid vehicle is presented using game model approaches. Hybrid vehicles combined the benefits of a gasoline engine and an electric motor, which can be utilized in parallel through a mechanical transmission. Players are considered to be the electric motor and the gasoline engine. Payoff matrices of the bimatrix game are calculated by a power controller of the hybrid vehicle. The Lemke-Howson algorithm used to compute a Nash equilibrium point which is a pair of strategies for both players. The solution concept is to integrate torque for satisfying the driver pedal motion. The ratio of the power contribution between the gasoline engine and electric motor is the key point for efficient driving, whilst satisfying power demands. The main contribution of this paper is the development of a power controller which improves fuel economy and reduces charging cycles thus minimizing emissions.

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Section: A Gasoline Engine Controllermentioning

confidence: 98%

Design of power controller for hybrid vehicle

Chin

Jafari

2010

2010 42nd Southeastern Symposium on System Theory (SSST 2010)

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“…It is characteristic of the three-way catalytic converter that high simultaneous conversion efficiencies for the three species occur only in a narrow band around stoichiometry, emphasizing the criticality of A/F control to minimizing tailpipe emissions. An overview of the challenges related to emissions control in the design and development of powertrain control systems for modern passenger vehicles may be found in [7].…”

Section: Port Fuel Injection Engine Controlmentioning

confidence: 99%

Automotive Powertrain Control - A Survey

Cook

Sun²,

Buckland

et al. 2008

Asian Journal of Control

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This paper surveys recent and historical publications on automotive powertrain control. Control-oriented models of gasoline and diesel engines and their aftertreatment systems are reviewed, and challenging control problems for conventional engines, hybrid vehicles and fuel cell powertrains are discussed. Fundamentals are revisited and advancements are highlighted. A comprehensive list of references is provided.

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“…The ubiquitous architecture in [1] for the airfuel ratio control problem is shown in Figure 2 with some adjustments in detail. Controlling the closed-loop system such that the feedback measurement synchronizes to the oscillatory input is like the Phase-Lock Loop shown in section 2, with a controlled oscillator automatically synchronizing to a reference or carrier signal.…”

Section: Introductionmentioning

confidence: 99%

A phase and frequency locking loop for engine air-fuel ratio control

Liu¹,

Dudek²,

Shafto³

2008

2008 American Control Conference

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In the spirit of the recent articles in [5], featuring Classical Controls Revisited, a Phase-Lock Loop concept is applied to an automotive air-fuel ratio closed-loop control system. This classical solution is analyzed, simulated, and experimentally implemented in a vehicle. The results demonstrate that the automobile engine air-fuel ratio system can be controlled to robustly meet emissions and driving performance requirements by using a simple classical control methodology with feedback from the common switching oxygen sensor. IntroductionA comprehensive survey of automotive engine control systems is available as a tutorial from 2005, [14]. In particular, the tutorial exemplifies air-fuel ratio (A/F) control with torque control, reviewing a number of approaches used by different researchers. Due to the plethora of linear model-based control techniques, a good number of references from [14] and elsewhere, choose to employ wide-range oxygen sensors for the feedback measurement. For example, [11] facilitates the use of an H ∞ control law design by linearizing the system model and closing the loop with the linear wide-range oxygen sensor; [2] first demonstrates successful transient air-fuel ratio control with an estimator built in event space, using linear feedback measurements; [4] produced an impressively robust predictive observer air-fuel ratio control system requiring the linear oxygen sensor for feedback information; and [9] uses the linear oxygen sensor to venture into constructing semi-positive definite control lyapunov functions to nonlinearly control both the fuel and air such that torque and air-fuel ratio specifications can be met. There are potentially a variety of alternatives to the wide-range oxygen sensor measurement for closing the loop on the air-fuel ratio system, such as using individual cylinder pressure sensors to provide peak pressure and its associated crank angle per firing to sustain engine air-fuel ratio operations that may not be stoichiometric. But for gasoline automotive engines

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Automotive emissions control

Cited by 9 publications

References 29 publications

Design of power controller for hybrid vehicle

Design of power controller for hybrid vehicle

Automotive Powertrain Control - A Survey

A phase and frequency locking loop for engine air-fuel ratio control

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