Method and apparatus for controlling start-up of internal combustion engine

• Main Authors: SATOU KENICHI, ITOYAMA HIROYUKI, SHIMASAKI SUSUMU, MURAKI HIROTADA, TAKAHASHI HIDEAKI, YASUDA HAJIME, SHIBATA TOHRU
• Format: Patent
• Language: English
• Published: 15.09.2015
• Subjects: BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDEDFOR; STARTING OF COMBUSTION ENGINES; WEAPONS

The internal combustion engine (1) has a throttle (23) for controlling an intake air amount and performs start-up through cranking. As the cranking is initiated, an atmospheric pressure is detected and an initial opening is set accordingly. The controller (31) controls the throttle (23) to the initial opening when the cranking is initiated, and controls the throttle to start to increase the throttle opening from the initial opening at a predetermined timing after the cranking initiation. By setting the initial opening based on one or both of the atmospheric pressure and the temperature at the time of cranking initiation, the intake negative pressure and the intake air amount are optimized.