Engine control device

Patent metadata

Field	Value
Publication number	US-2016298558-A1
Application number	US-201615069624-A
Country	US
Kind code	A1
Filing date	Mar 14, 2016
Priority date	Apr 9, 2015
Publication date	Oct 13, 2016
Grant date	—

Abstract

There is provided an engine control device including (1) a regulator that regulates a flow rate per unit of time of exhaust gas discharged from an engine, and (2) a controller that, in cases in which an external temperature detection section detects an external temperature below freezing point, and a previous engine operation duration is shorter than a predetermined first duration, controls the regulator such that the flow rate rises to exceed a predetermined normal state, until a predetermined second duration has elapsed since the engine was started up.

First claim

What is claimed is:

1 . An engine control device comprising:
a regulator that regulates a flow rate per unit of time of exhaust gas discharged from an engine; and a controller that, in cases in which an external temperature detection section detects an external temperature below freezing point, and a previous engine operation duration is shorter than a predetermined first duration, controls the regulator such that the flow rate rises to exceed a predetermined normal state, until a predetermined second duration has elapsed since the engine was started up.

2 . The engine control device of claim 1 , wherein the regulator regulates the flow rate by regulating the number of engine revolutions.

3 . The engine control device of claim 2 , wherein
the regulator regulates the number of engine revolutions by regulating a throttle position that regulates an air intake amount to the engine.

4 . The engine control device of claim 1 , wherein
the controller starts to control the regulator in cases in which a vehicle speed is a predetermined vehicle speed indicating that travelling has started, or above.

5 . The engine control device of claim 1 , wherein
in cases in which the flow rate has risen and an air intake amount per unit of time has exceeded a predetermined amount of air, the controller further controls the regulator such that the raising of the flow rate is stopped and the flow rate becomes the normal state.

6 . The engine control device of claim 1 , wherein
in cases in which a position detection section detects that a shift position is a reverse position, the controller starts control of the regulator.

7 . The engine control device of claim 1 , wherein
when controlling the regulator, the controller controls the regulator such that the flow rate rises for a predetermined duration at predetermined intervals in time.

8 . The engine control device of claim 1 , wherein the controller is provided to a hybrid vehicle.

9 . The engine control device of claim 1 , further comprising an exhaust heat recovery unit that is provided at a downstream side of a catalyst for purifying exhaust gas and that recovers heat from exhaust gas.

Assignees

• Toyota Motor Co Ltd

Inventors

• Murata Toshio

Classifications

• F02D9/02

  concerning induction conduits (throttle valves, or arrangements thereof in conduits F02D9/08) · CPC title

• F02D41/0235 Primary

  in relation with the state of the exhaust gas treating apparatus (control of exhaust gas treating apparatus per se F01N) · CPC title

• B60W10/06 Primary

  including control of combustion engines · CPC title

• F01N3/005

  for draining or otherwise eliminating condensates or moisture accumulating in the apparatus (F01N3/02 takes precedence) · CPC title

• F02D33/02

  of combustion-air · CPC title