초록 ▼

An engine shut down apparatus of an internal combustion engine having a magneto type ignition system comprises a magneto generator, a power source circuit, an engine stop switch, a fuel cut drive circuit, a fuel cut-off solenoid valve, an engine stop circuit and a fuel cut-off/ignition stop circuit.

An engine shut down apparatus of an internal combustion engine having a magneto type ignition system comprises a magneto generator, a power source circuit, an engine stop switch, a fuel cut drive circuit, a fuel cut-off solenoid valve, an engine stop circuit and a fuel cut-off/ignition stop circuit. When the engine stop switch is turned on, in the fuel cut-off/ignition stop circuit, an engine stop instruction signal is sent to the fuel cut-off drive circuit and then the fuel cut-off solenoid valve is operated so as to close the fuel supply to the engine. On the other hand, in the fuel cut-off/ignition stop circuit, the engine stop instruction signal is sent to the engine stop circuit after a specified time has elapsed so as to operate the engine stop circuit with a time lag. Then, the engine stop circuit short-circuits the ignition system so as to stop ignition. Further, the fuel cut-off/ignition stop circuit is electrically separated with respect to electric noises from the ignition system. Thus, the engine shut down apparatus enables the engine to stop smoothly and securely without causing running-on or after-burning under any operating condition.

대표청구항 ▼

[ What is claimed:] [1.] An engine shut down apparatus of an internal combustion engine having, a fuel system for supplying fuel to said engine, a fuel cut-off valve provided in said fuel system for stopping fuel supply to said engine, an ignition system for providing spark ignition and a magneto fo

[ What is claimed:] [1.] An engine shut down apparatus of an internal combustion engine having, a fuel system for supplying fuel to said engine, a fuel cut-off valve provided in said fuel system for stopping fuel supply to said engine, an ignition system for providing spark ignition and a magneto for supplying electric power to engine equipment including said ignition system, comprising:engine stop means for providing an engine stop instruction signal;fuel supply stopping means for stopping said fuel supply to said engine;ignition stopping means for stopping said spark ignition;control means responsive to said engine stop instruction signal for sending a fuel supply stopping signal to said fuel supply stopping means and for sending an ignition stopping signal to said ignition stopping means when a specified time has elapsed since said engine stop instruction signal is sent;a first power source provided in said magneto for supplying electric power to said ignition system and said ignition stopping means;a second power source provided in said magneto for supplying electric power to said fuel supply stopping means and said control means; andseparating means operatively disposed between said control means and said ignition stopping means for electrically separating said control means from said ignition stopping means such that said ignition stopping signal is unaffected by electrical noise.