US 10,837,387 B2Granted

Engine control device

AssigneeToyota Jidosha Kabushiki Kaisha

InventorsNaoki Hayashima, Masatomo Yoshihara, Koji Murakami

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Abstract

An engine control device includes an electronic control unit. The electronic control unit is configured to perform a spark discharge with an ignition plug for each cylinder by cutting off energization after elapse of a predetermined period from start of energization to an ignition coil for each cylinder of the engine, to stop the spark discharge caused by the ignition plug for each cylinder after supply of fuel to the engine is stopped when operation of the engine is stopped, and to control an ignition plug so as to stop the spark discharge caused by the ignition plug from a cylinder after a rotation speed of a crankshaft decreases gradually and the rotation speed of the crankshaft reaches a preset threshold value or less, after the stop of the supply of fuel to the engine.

Claims4

Dependent claims

An engine control device for an engine, comprising:

an electronic control unit configured to:
perform a spark discharge with an ignition plug for each cylinder of the engine by cutting off energization after elapse of a predetermined period from start of energization to an ignition coil for each cylinder of the engine, wherein the ignition plug is always directly electrically connected to the ignition coil, and the ignition coil is provided integrally with an ignitor,
continue the spark discharge caused by the ignition plug for each cylinder of the engine after supply of fuel to the engine is stopped when operation of the engine is stopped, and
immediately cut off the energization to the ignition coil even before the elapse of the predetermined period in response to a crankshaft becoming reversely operated after the start of energization to the ignition coil.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 16/274,486Filed 13 Feb 2019 · division
Priority: JP 2017-02660216 Feb 2017
Published: US 2019/0178222 A113 Jun 2019
Granted: 17 Nov 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification17 codes

F02D 41/042
Introducing corrections for particular operating conditions: for stopping the engine
F02D 41/009
Electrical control of supply of combustible mixture or its constituents: using means for generating position or synchronisation signals
F02P 3/0556
Opening or closing the primary coil circuit with semiconductor devices: protecting the coil when the engine is stopped
F02P 5/045
Automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions: combined with electronic control…