Interactive process during engine idle stop mode

• Main Authors: DOURRA HUSSEIN, LEISING MAURICE
• Format: Patent
• Language: English
• Published: 04.05.2004
• Edition: 7
• Subjects: BLASTING; CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ENGINEERING ELEMENTS AND UNITS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; THERMAL INSULATION IN GENERAL; TRANSPORTING; VEHICLES IN GENERAL; WEAPONS

A process for regulating stopping of an engine during a typical traffic idling event in order to reduce fuel consumption. There is an interactive process between the engine and the transmission involving shutting down the engine when the driver has braked to a stop and restarting upon release of brake pressure. The transmission input elements are clamped during the engine shut down to minimize transient torque disturbance and the vehicle is restarted when motion is detected. The process involves pressurizing of first gear friction elements during the stop period using an auxiliary pump so that the transmission will be ready to transmit torque on restart. Restart surge is avoided by transmitting a limited amount of torque in a controlled manner during a restart.