Over-revolution preventing apparatus for internal combustion eng

Details Over-revolution preventing apparatus for internal combustion eng Over-revolution preventing apparatus for internal combustion eng

1983-10-03

1985-01-08

Nelli, Raymond A.

Internal-combustion engines

High tension ignition system

Safety device

123198DC, 123 48D, 123334, F02N 1510, F02P 100, F02D 3300

Patent

active

044921977

ABSTRACT:
An electronic revolution rate limiting apparatus is described which generally comprises a transducer for generating a tachometer signal which is indicative of the revolution rate of the internal combustion engine, a circuit for producing a control signal which is responsive to the tachometer signal and the operation state of the engine and which determines the maximum revolution rate for each of a plurality of operation states, and a switch for interacting with the ignition system of the engine to prevent a sparking voltage from being induced in the ignition system in response to the value of the control signal. When the revolution rate limiting apparatus is employed in a power plant in which the operation states comprise a plurality of drive states (e.g., forward, neutral, reverse), the circuit for producing the control signal is also responsive to which drive state the power plant is in, such that the maximum revolution rate may be individually controlled for each drive state.

REFERENCES:
patent: 3563219 (1971-02-01), Miearas
patent: 3703889 (1972-11-01), Bodig et al.
patent: 3863616 (1975-02-01), Wood
patent: 4144859 (1979-03-01), Ohki et al.
patent: 4171687 (1979-10-01), Coventry
patent: 4204490 (1980-05-01), Ohki et al.
patent: 4223657 (1980-09-01), Sato et al.
patent: 4366778 (1982-06-01), Howard
patent: 4403970 (1983-09-01), Dretzka et al.
patent: 4421082 (1983-12-01), Katayose et al.

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