The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 03, 2003
Filed:
Jul. 28, 2000
Makoto Yamakado, Tsuchiura, JP;
Yoshiyuki Tanabe, Hitachinaka, JP;
Toshio Takahata, Atsugi, JP;
Hiromasa Kubo, Yokohama, JP;
Yasunaga Hamada, Hitachinaka, JP;
Yoshio Okamoto, Minori, JP;
Yuzo Kadomukai, Ishioka, JP;
Other;
Abstract
The target peak current value, where a current value is reduced in conformity to a drop in the voltage of a battery is stored in target peak current storage unit . ON-signals are sent from current control circuit to power transistor in response to the injection command pulse coming from engine controller so that current is applied to coil . Then, the current flowing to coil is detected by the current detecting resistor . Comparator compares this detected current and the target peak current value read from the target peak current storage unit conforming to the voltage of battery . If agreement is found between these two values, OFF-signals are sent to power transistor from current control circuit in response to the switching command coming from comparator . Then, On/Off signals to effect holding of the coil are sent from current control circuit to power transistor . The linearity of the injection volume despite changes in battery voltage can be maintained.