Invention Grant
- Patent Title: Method for estimating the crank angle at which 50% of the fuel mass has been burnt in a cylinder of an internal combustion engine with spontaneous mixture ignition
- Patent Title (中): 用于估计在具有自发混合点火的内燃机的气缸中已燃烧了50％燃料的曲柄角的方法
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Application No.: US12897968Application Date: 2010-10-05
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Publication No.: US08028568B2Publication Date: 2011-10-04
- Inventor: Gabriele Serra , Savino L Lupo
- Applicant: Gabriele Serra , Savino L Lupo
- Applicant Address: IT Corbetta
- Assignee: Magneti Marelli Powertrain S.p.A.
- Current Assignee: Magneti Marelli Powertrain S.p.A.
- Current Assignee Address: IT Corbetta
- Agency: FSP LLC
- Priority: EP07425457 20070725
- Main IPC: G01M15/06
- IPC: G01M15/06
Abstract:
A method for determining the angular speed of a drive shaft of an internal combustion engine at each tooth event of a phonic wheel presenting a number N of teeth includes detecting the angular amplitude for each tooth; detecting the time of each tooth; and determining the raw angular speed of each tooth according to the corresponding angular amplitude and time. For each tooth a compensation value is determined which represents the difference between the actual angular amplitude of the tooth and the theoretic angular amplitude of the tooth; and determining the angular speed of each tooth by correcting the raw angular speed based on the corresponding compensation value.
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