Thermoplastic throttle body

• Main Authors: DUTMER GERRIT H, LIM JONG-EON
• Format: Patent
• Language: English
• Published: 03.06.2004
• Edition: 7
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; BLASTING; CHEMISTRY; COMBUSTION ENGINES; COMPOSITIONS BASED THEREON; CONTROLLING COMBUSTION ENGINES; GENERAL PROCESSES OF COMPOUNDING; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; LIGHTING; MECHANICAL ENGINEERING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WEAPONS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

The invention relates to a process of making a throttle body comprising injection-moulding of a reinforced thermoplastic composition, wherein a polyethylene terephthalate composition containing a nucleating agent and 25-60 mass % of glass-fibres is used as the reinforced thermoplastic composition. Advantages of the throttle body obtainable by the process according to the invention include excellent dimensional tolerances and stability, significant weight reduction of the body, and improved fuel efficiency of an internal combustion engine equipped with an air-intake assembly comprising a throttle body according to the invention.