Validation of a blowby model using experimental results in motoring condition with the change of compression ratio and engine speed

Model-based multi-parametric programming strategies towards the integration of design, control and operational optimization

“…3.11). Lubrication between the pistons and the cylinder walls is not taken into consideration here [3,271].…”

“…The constant M in the problem (D.14) represents a su ciently large number which bounds the auxiliary variable t to an upper bound 3 . This boundary is required for stability, as the variable indicates the lowest distance in a 2-norm sense from the constraint.…”

“…• Volume set-point: 2m 3 Note that in the case of the tank the set-point for the volume V SP is dynamically defined as the maximum value of the inlet flow rate (i.e. if…”

“…a dynamic 'high fidelity' process model of the CHP system (Chapter 3), 2. suitable approximate models that adequately capture its operation (Chapter 4), 3. a dynamic optimization formulation that simultaneously optimizes a conventional PI control scheme and the design of the system, 4. a multi-parametric model predictive control formulation based on the optimal design of the approximate model (Chapter 4) and 5. a simultaneous design and control optimization framework by multi-parametric programming (Chapter 6)…”

Cavitation induced starvation for piston-ring/liner tribological conjunction

“…However, in reality combustion gases do pass through several crevices, leading to blowby [27]. This affects engine performance and exhaust emissions [28,29]. For a gasoline engine running at 2000 rev/min, the pressure behind the top ring was measured as ≈ 25% of the combustion pressure [27], which (as a representative value) was also used in the current study.…”