Control apparatus for internal combustion engine

• US 9,719,432 B2
• Filed: 09/12/2011
• Issued: 08/01/2017
• Est. Priority Date: 09/12/2011
• Status: Expired due to Fees

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Nakada, Hayato
• Primary Examiner(s): Cronin, Stephen K
• Assistant Examiner(s): SCHARPF, SUSAN E
• Application Number:
  US14/344,024
• Publication Number:
  US 20140236455A1
• Time in Patent Office: 2,150 Days
• Field of Search: 701102, 718100, 718101, 718102, 718103, 718104, 718105, 718107
• CPC Class Codes: F02D 2041/1433 using a model or simulation of the system
• CPC Class Codes: F02D 2200/0804 Estimation of the temperature of the exhaust gas treatment apparatus
• CPC Class Codes: F02D 28/00 Programme-control of engines
• CPC Class Codes: F02D 35/02 on interior conditions
• CPC Class Codes: F02D 41/047 Taking into account fuel evaporation or wall wetting; special correction after fuel cut-off F02D41/126
• CPC Class Codes: F02D 41/123 the fuel injection being cut-off
• CPC Class Codes: F02D 41/1447 with determination means using an estimation
• CPC Class Codes: F02D 41/26 using computer, e.g. microprocessor
• CPC Class Codes: G06F 9/5083 Techniques for rebalancing the load in a distributed system

Abstract

A control apparatus for the internal combustion engine has a multicore processor mounted with a plurality of the cores, calculates various tasks regarding an operation of the internal combustion engine, and distributes the tasks to the plurality of the cores respectively to perform a calculation, and a controller that makes the number of cores for use in the calculation smaller while fuel cutoff is carried out than before the fuel cutoff is carried out. The controller selects, as a designated core, at least one of the cores for use in a specific calculation associated with combustion of the internal combustion engine. The controller stops the designated core from being used while fuel cutoff is carried out. As the specific calculation associated with combustion, for example, it is possible to mention a combustion forecasting calculation of a cylinder model, a temperature forecasting calculation of a catalyst temperature estimation model, and a fuel adhesion amount forecasting calculation of a fuel adhesion model.

Claims

1. A control apparatus for an internal combustion engine that has a multicore processor mounted with a plurality of cores and performs a combustion forecasting calculation based on a cylinder model of the internal combustion engine, comprising:

a controller configured to;

distribute the tasks to the plurality of the cores respectively to perform the combustion forecasting calculation,

select, as a designated core, at least one of the cores of the plurality of cores for use in the combustion forecasting calculation, the designated core being associated with calculation of a fuel injection amount of the internal combustion engine,

decrease a number of cores for use in the combustion forecasting calculation while all cylinder fuel cutoff of the internal combustion engine is carried out than before the all cylinder fuel cutoff is carried out, and

stop the designated core from being used while all cylinder fuel cutoff of the internal combustion engine is carried out,

wherein the cylinder model of the internal combustion engine used for the combustion forecasting calculation uses a flow rate of air flowing into each of the cylinders, an amount of fuel, and an ignition timing as inputs, and forecasts outputs resulting from the combustion in the cylinders including torque and a temperature of gas discharged from the cylinders.

2. The control apparatus for the internal combustion engine according to claim 1, wherein the controller is configured to increase the number of cores for use in the calculation after a recovery from the all cylinder fuel cutoff is made than before the recovery is made.

3. The control apparatus for the internal combustion engine according to claim 1, wherein the controller is configured to use the designated core while all cylinder fuel cutoff of the internal combustion engine is not carried out.

4. A control apparatus for a diesel engine that is equipped with a post-treatment device in an exhaust system, the diesel engine has a multicore processor mounted with a plurality of cores and performs a temperature forecasting calculation of the post-treatment device based on a catalyst temperature estimation model, comprising:

a controller configured to;

distribute the tasks to the plurality of the cores respectively to perform the temperature forecasting calculation,

select, as a designated core, at least one of the cores of the plurality of cores for use in the temperature forecasting calculation, the designated core being associated with calculation of a fuel injection amount of the diesel engine,

decrease a number of cores for use in the temperature forecasting calculation while all cylinder fuel cutoff of the diesel engine is carried out than before the all cylinder fuel cutoff is carried out, and

stop the designated core from being used while all cylinder fuel cutoff of the diesel engine is carried out,

wherein the catalyst temperature estimation model of the diesel engine used for the temperature forecasting calculation uses properties of gas flowing into the post-treatment device including components, temperature, and flow rate as inputs, and forecasts a temperature of gas discharged from the post-treatment device.

5. A control apparatus for a spark ignition engine that is equipped with a port injector that injects fuel into an intake port, the spark ignition engine has a multicore processor mounted with a plurality of cores and performs a fuel adhesion amount forecasting calculation of the intake port based on a fuel adhesion model, comprising:

a controller configured to;

distribute the tasks to the plurality of the cores respectively to perform the fuel adhesion amount forecasting calculation,

select, as a designated core, at least one of the cores of the plurality of cores for use in the fuel adhesion amount forecasting calculation, the designated core being associated with calculation of a fuel injection amount of the spark ignition engine,

decrease a number of cores for use in the fuel adhesion amount forecasting calculation while all cylinder fuel cutoff of the spark ignition engine is carried out than before the all cylinder fuel cutoff is carried out, and

stop the designated core from being used while all cylinder fuel cutoff of the spark ignition engine is carried out,

wherein the fuel adhesion model of the spark ignition engine used in the fuel adhesion amount forecasting calculation uses an amount of fuel injection to the intake port, a port adhesion ratio, and a port residual ratio as inputs, and forecasts an amount of fuel adhered to the intake port.