The Meta VVH System - A Continuously Variable Valve Timing System

Kreuter, Peter; Heuser, Peter; Reinicke-Murmann, Joachim

doi:10.4271/980765

Cited by 25 publications

(10 citation statements)

References 6 publications

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“…The relative wear for warm-compacted and sintered 7.1 g/cm 3 sprockets is greater than that for conventional sprockets. However, the relative wear for warm-compacted and sintered 7.2 g/cm 3 sprockets is less than that for conventional sprockets. Special alloys are unnecessary with warm compaction, which is an advantage in terms of recycling materials.…”

Section: Case Study 2: Warm Compactionmentioning

confidence: 82%

“…9) Figure 5 shows the relative wear of conventional P/M alloy steel sprockets and warm-compacted sprockets. The relative wear for warm-compacted and sintered 7.1 g/cm 3 sprockets is greater than that for conventional sprockets. However, the relative wear for warm-compacted and sintered 7.2 g/cm 3 sprockets is less than that for conventional sprockets.…”

Section: Case Study 2: Warm Compactionmentioning

confidence: 93%

“…The above-mentioned P/M alloy steel sprocket was used instead of heat-treated Fe-Cu-C P/M alloy sprockets. Therefore, warmcompacted and sintered high-density (7.2 g/cm 3 ) sprockets can be used in place of heat-treated conventional Fe-Cu-C P/M alloy sprockets. Although warm compaction consumes energy when heating both the powder and the dies/tools, the amount of energy that is consumed is much less than when heat treatment is used for P/M steels.…”

Section: Case Study 2: Warm Compactionmentioning

confidence: 99%

“…Fitting an engine with any of these systems reduces the fuel consumed and gases emitted. [1][2][3] Direct fuel injection systems further reduce fuel consumption. Several P/M parts are used in all of these systems, such as in fuel injector and air intake control systems.…”

Section: Introductionmentioning

confidence: 99%

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Environmentally Benign Manufacturing of Automotive Parts via Powder Metallurgy

2002

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Automotive parts produced using a powder metallurgy (P/M) process are commonly used in automobiles because they can be produced without the use of machining and with a special alloy design. This paper describes how the P/M process can be applied to the production of environmentally friendly automotive parts. The paper begins with a discussion on how the utilization of P/M for net-shape manufacturing makes it possible to conserve both energy and materials due to the fact that machining is unnecessary. Evidence is then presented that shows that it is possible to produce warm-compacted automotive P/M parts with sufficient strength even without the use of special alloy elements and/or heat treatments. As a final example, magnet materials made using spark-plasma sintering are described. This spark-plasma sintering process makes it possible to create high-performance magnet parts that are highly energy efficient. Finally, taking into consideration the above-mentioned example, the ideal P/M process is discussed from an environmentally benign point of view.

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Section: Case Study 2: Warm Compactionmentioning

confidence: 82%

Section: Case Study 2: Warm Compactionmentioning

confidence: 93%

Section: Case Study 2: Warm Compactionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Environmentally Benign Manufacturing of Automotive Parts via Powder Metallurgy

2002

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“…However, such devices can be complex, bulky, and relatively expensive, so their applications tend to be limited. Figure 1 [5, 14,25,37] lists the works known to the applicants with comparisons on features and capabilities. It is noted that the Ford design has more features than others, but has not advanced to full engine operations.…”

Section: Background and Technical Objectivesmentioning

confidence: 99%