Electronic injection system for Otto engines

Details Electronic injection system for Otto engines Electronic injection system for Otto engines

1991-02-14

1992-02-25

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Fuel injection system

123337, 123478, F02D 908, F02D 3302, F02D 4118, F02D 4114

Patent

active

050903900

ABSTRACT:
An electronic injection system for Otto engines with injection nozzle (4) has a displaceable throttle body disposed in the intake air flow (2), and includes intake air mass measurement. In order to assure optimal measurement and dosaging of the mass flow of air at minimum structural expense and within a minimum space, particularly in the case of rapidly varying engine loads and speeds of rotation, the injection system has a convergent/divergent nozzle (12) with narrowest cross section adjustable by the nozzle body. The system includes a position indicator (18) for the throttle body, measurement devices for the pressure p.sub.O in front of the nozzle, and the pressure p.sub.L at the narrowest point of the nozzle and the air temperature T.sub.O in front of the nozzle. Also included is an electronic controller device (19) operative with at least the input variables p.sub.O, p.sub.L, T.sub.O and position (x) of the throttle body to provide an output variable opening time t.sub.O of the injection nozzle.

REFERENCES:
patent: 4112879 (1978-09-01), Assenheimer et al.
patent: 4131088 (1978-12-01), Reddy
patent: 4579097 (1986-04-01), Yamamoto et al.
patent: 4683857 (1987-08-01), Yasuoka
patent: 4750464 (1988-06-01), Staerzl
patent: 4763626 (1988-08-01), Staerzl
patent: 4903649 (1990-02-01), Staerzl

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