Title: Vacuum controlled ignition timing apparatus for internal combustion engine

Abstract: Ignition timing control apparatus for an internal combustion spark ignition engine employs a vacuum actuator having a movable element positioned between first and second vacuum chambers and arranged to advance or retard the spark timing. A single three-way control valve, electrically operated, serves to connect one of the vacuum chambers to engine intake vacuum pressure and to vent the other vacuum chamber to atmosphere, depending on speed of the vehicle driven by the engine. A temperature responsive valve cuts off engine intake vacuum pressure to the three-way control valve when the ambient temperature drops below a predetermined level.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Kurihara, Norimitsu (Wako, JP)

Application Number: 776354
Filing Date: 1977-03-10
Publication_date: 1979-04-17
Assignee: Honda Giken Kogyo Kabushiki Kaisha (Tokyo, JP)
Primary Class(es): 123/406.7
Other Classes:
US Patent Ref:

3272191	Sep, 1966	Walker	123/117.
3603298	Sep, 1971	Toda et al.	123/117.
3650253	Mar, 1972	Cooksey	123/117.
3687120	Aug, 1972	Lenz	123/146.
3704697	Dec, 1972	Weymann	123/117.
3804326	Apr, 1974	McIntire	123/117.
3885535	May, 1975	Walker	123/117.
3978831	Sep, 1976	Yoshikawa	123/117.
4027633	Jun, 1977	Otsubo et al.	123/117.
4051823	Oct, 1977	Mogi et al.	123/117.

Other Refs:
Primary Examiner: Myhre, Charles J.
Assistant Examiner: Dolinar, Andrew M.
Attorney: Lyon and Lyon