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. 07, 1977
Filed:
Feb. 03, 1975
Helmut Moder, Stuttgart, DT;
Robert Bosch G.m.b.H., Stuttgart, DT;
Abstract
A fuel injection control apparatus provides electrical pulses whose length determines the amount of fuel supplied to the injection valves of the engine. These pulses can be extended by a circuit including a temperature dependent resistor when the engine has not reached operational temperature. This same mechanism is utilized to lengthen the fuel delivery control pulses even when the engine is warmed up, i.e., under hot-start conditions, by connecting a switching transistor in series with the temperature-dependent resistor that monitors the engine temperature. If, while the engine is hot, the starter motor is being cranked longer than a predetermined length of time, the switching transistor turns off and causes the fuel injection pulse to be lengthened, thereby supplying additional fuel to the engine to overcome a possible fuel vapor lock.