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. 20, 1989
Filed:
May. 10, 1988
Andre Brunel, St Genis Laval, FR;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
In a fuel injection pump for internal combustion engines having at least one pump piston defining a pump work chamber and set into reciprocating motion by a cam drive for executing an intake stroke and a supply stroke, and having an electrical switching valve controlling the duration of supply and disposed in a relief line leading from the pump work chamber to a pump interior, a non-return valve having an opening direction toward the pump work chamber is disposed in a fuel inflow line connecting the pump interior with the pump work chamber in order to attain an emergency stoppage of the engine in the event the switching valve malfunctions. The valve element of the non-return valve is acted upon on one side by a valve closing spring and on the other by a fuel-filled control chamber, with which the valve element is locked in its closing position during the closed position of the switching valve.