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:
Apr. 06, 1976
Filed:
Mar. 14, 1975
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JA;
Abstract
An automatic choke valve apparatus for an internal combustion engine comprising a choke valve mounted in an intake passage of an internal combustion engine and having an operation shaft connected to a driving shaft of an external pulse motor through an intermediate torsion spring and through circumferentially disposed front and rear pawls such that drive rotation from the motor can be effected only in the regular direction of rotation thereof. A driving pulse circuit is connected to the pulse motor to drive the same between first through fourth sequential operation conditions by respective detecting of the closure of an engine ignition switch, closure of an engine starter switch, beginning of complete firing of the engine, and continuing of the complete firing. The motor is driven in reverse direction of rotation in the first operation condition and in sequential regular direction of rotation in the second to forth operation conditions. In the first operation condition the motor is driven in predetermined high speed reverse direction of rotation, whereas in the second operation condition, it is driven in the regular direction of rotation for a predetermined constant time interval at a speed corresponding to engine temperature, whereas in the third operation condition, it is driven in regular direction of rotation at a predetermined high speed for a constant time interval, while in the fourth operation condition it is driven in the regular direction of rotation at a speed corresponding to engine temperature.