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An engine has an exhaust control valve which is moved by a control system according to a predetermined control strategy. The control system obtains data from sensors that help the control system to identify certain characteristics of engine operating conditions. The control strategy involves cycling

An engine has an exhaust control valve which is moved by a control system according to a predetermined control strategy. The control system obtains data from sensors that help the control system to identify certain characteristics of engine operating conditions. The control strategy involves cycling the exhaust control valve under predetermined engine operating conditions to clean the surface of the valve while reducing the impact of the cycling on engine performance. The cycling generally occurs during engine start-up and following engine shutdown. The cycling may be aborted during periods of rapid acceleration.

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An engine has an exhaust control valve which is moved by a control system according to a predetermined control strategy. The control system obtains data from sensors that help the control system to identify certain characteristics of engine operating conditions. The control strategy involves cycling

An engine has an exhaust control valve which is moved by a control system according to a predetermined control strategy. The control system obtains data from sensors that help the control system to identify certain characteristics of engine operating conditions. The control strategy involves cycling the exhaust control valve under predetermined engine operating conditions to clean the surface of the valve while reducing the impact of the cycling on engine performance. The cycling generally occurs during engine start-up and following engine shutdown. The cycling may be aborted during periods of rapid acceleration. 2. The lightweight folding table of claim 1, wherein the tabletop is substantially hollow and is constructed of a plastic material formed by blow molding. 3. The lightweight folding table of claim 1, wherein the plurality of legs comprises at least three legs. 4. The lightweight folding table of claim 1, wherein each bracket of the plulraity of brackets are attached to the mounting surface without mechanical fasteners. 5. The lightweight folding table of claim 4, wherein the brackets are attached to the mounting surface by an adhesive applied between the brackets and the mounting surface. 6. The lightweight folding table of claim 5, wherein the fixturing mounts comprise a plurality of slots formed in the fixturing mounts, the slots being configured to receive the adhesive and to hold the adhesive against the brackets. 7. A lightweight folding table, comprising: a tabletop comprising a working surface and a mounting surface disposed opposite the working surface; a plurality of legs independently arranged in supportable relation to the tabletop; a plurality of brackets secured to the mounting surface, each bracket of the plurality of brackets being configured to provide pivotal coupling between a leg of the plurality of legs and the tabletop; and wherein the mounting surface comprises a plurality of fixturing mounts, each of which is configured to receive a bracket from the plurality of brackets during attachment of the bracket to the mounting surface and wherein each of the fixturing mounts comprises a plurality of fixturing protrusions positioned to restrain motion of a bracket from the plurality of brackets in a direction parallel to the table top. 8. The lightweight folding table of claim 7, wherein each bracket is further configured to be slidable in a direction substantially perpendicular to the table top to engage the fixturing protrusions. 9. A lightweight folding table, comprising: a tabletop comprising a working surface and a mounting surface disposed opposite the working surface; a plurality of legs independently arranged in supportable relation to the tabletop; a plurality of brackets secured to the mounting surface, each bracket of the plurality of brackets being configured to provide pivotal coupling between a leg of the plurality of legs and the tabletop; and wherein the mounting surface comprises a plurality of fixturing mounts, each of which is configured to receive a bracket from the plurality of brackets during attachment of the bracket to the mounting surface and wherein each of the fixturing mounts comprises at least a first gap, and wherein each of the brackets comprises at least a first tab protruding from the bracket, the first tab being configured to be engageable within the first gap. 10. A lightweight folding table, comprising: a tabletop comprising a working surface and a mounting surface disposed opposite the working surface; a plurality of legs independently arranged in supportable relation to the tabletop; a plurality of brackets secured to the mounting surface, each bracket being configured to pivotally attach a leg of the plurality of legs to the tabletop; and wherein the mounting surface comprises a plurality of fixturing protrusions configured to restrict lateral motion of the brackets. 11. The lightweight folding table of claim 10, wherein the plurality of fixturing protrusions further comprises a mounting shelf disposed proximate an outer edge of the mounting surface and positioned to restrict motion of each of the plurality of brackets toward the outer edge. 12. The lightweight folding table of claim 11, wherein the plurality of fixturing protrusions further comprises a plurality of abutments positioned proximate the mounting shelf, so as to restrict motion of each of the plurality of brackets away from the outer edge. 13. The lightweight folding table of claim 12, wherein the plurality of fixturing protrusions further comprises a securing member configured to engage