Power output apparatus, vehicle equipped with power output apparatus, and control method of power output apparatus
First Claim
1. A power output apparatus that outputs power to a driveshaft, said power output apparatus comprising:
- an internal combustion engine that is operable independently of a rotating state of the driveshaft;
a motoring structure that is capable of motoring the internal combustion engine;
an oxygen concentration measurement unit that is located in an exhaust system of the internal combustion engine to measure an oxygen concentration in exhaust emission from the internal combustion engine;
a status detection module that detects a current status of the oxygen concentration measurement unit based on a measurement result of the oxygen concentration measurement unit, when a predetermined execution condition is satisfied in a fuel injection-stop engine rotation state where the internal combustion engine is rotated with stop of fuel injection; and
a status detection-time control module that controls the internal combustion engine and the motoring structure to maintain the fuel injection-stop engine rotation state upon satisfaction of a predetermined cancellation condition for canceling the fuel injection-stop engine rotation state during detection of the current status of the oxygen concentration measurement unit by said status detection module, said status detection-time control module controlling the internal combustion engine and the motoring structure to cancel the fuel injection-stop engine rotation state on completion of the detection of the current status.
1 Assignment
0 Petitions
Accused Products
Abstract
A vehicle is equipped with a planetary gear mechanism including a sun gear, a carrier, and a ring gear that are respectively connected to a first motor, an engine, and a driveshaft. A second motor is further linked to the driveshaft. An air-fuel ratio sensor located in an exhaust system of the engine detects the air-fuel ratio while the engine is rotated in a fuel cut state. Normality or abnormality of the air-fuel ratio sensor is identified, based on a result of determination whether the detected air-fuel ratio is out of a specified normal range. When engine stop conditions for stopping the operation (rotation) of the engine are satisfied during execution of failure detection of the air-fuel ratio sensor (steps S300 and S310), the drive control of the invention maintains the rotation of the engine in the fuel cut state until completion of the failure detection of the air-fuel ratio sensor and controls the first motor to motor the engine (step S330). The operation of the engine is stopped on completion of the failure detection (step S320).
-
Citations
16 Claims
-
1. A power output apparatus that outputs power to a driveshaft, said power output apparatus comprising:
-
an internal combustion engine that is operable independently of a rotating state of the driveshaft;
a motoring structure that is capable of motoring the internal combustion engine;
an oxygen concentration measurement unit that is located in an exhaust system of the internal combustion engine to measure an oxygen concentration in exhaust emission from the internal combustion engine;
a status detection module that detects a current status of the oxygen concentration measurement unit based on a measurement result of the oxygen concentration measurement unit, when a predetermined execution condition is satisfied in a fuel injection-stop engine rotation state where the internal combustion engine is rotated with stop of fuel injection; and
a status detection-time control module that controls the internal combustion engine and the motoring structure to maintain the fuel injection-stop engine rotation state upon satisfaction of a predetermined cancellation condition for canceling the fuel injection-stop engine rotation state during detection of the current status of the oxygen concentration measurement unit by said status detection module, said status detection-time control module controlling the internal combustion engine and the motoring structure to cancel the fuel injection-stop engine rotation state on completion of the detection of the current status. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A vehicle;
- said vehicle comprising;
an internal combustion engine that is operable independently of a rotating state of a driveshaft linked with an axle;
a motoring structure that is capable of motoring the internal combustion engine;
an oxygen concentration measurement unit that is located in an exhaust system of the internal combustion engine to measure an oxygen concentration in exhaust emission from the internal combustion engine;
a status detection module that detects a current status of the oxygen concentration measurement unit based on a measurement result of the oxygen concentration measurement unit, when a predetermined execution condition is satisfied in a fuel injection-stop engine rotation state where the internal combustion engine is rotated with stop of fuel injection; and
a status detection-time control module that controls the internal combustion engine and the motoring structure to maintain the fuel injection-stop engine rotation state upon satisfaction of a predetermined cancellation condition for canceling the fuel injection-stop engine rotation state during detection of the current status of the oxygen concentration measurement unit by said status detection module, said status detection-time control module controlling the internal combustion engine and the motoring structure to cancel the fuel injection-stop engine rotation state on completion of the detection of the current status. - View Dependent Claims (11, 12, 13)
- said vehicle comprising;
-
14. A control method of a power output apparatus, said power output apparatus comprising:
- an internal combustion engine that is operable independently of a rotating state of a driveshaft;
a motoring structure that is capable of motoring the internal combustion engine; and
an oxygen concentration measurement unit that is located in an exhaust system of the internal combustion engine to measure an oxygen concentration in exhaust emission from the internal combustion engine,said control method comprising the steps of;
(a) detecting a current status of the oxygen concentration measurement unit based on a measurement result of the oxygen concentration measurement unit, when a predetermined execution condition is satisfied in a fuel injection-stop engine rotation state where the internal combustion engine is rotated with stop of fuel injection; and
(b) controlling the internal combustion engine and the motoring structure to maintain the fuel injection-stop engine rotation state upon satisfaction of a predetermined cancellation condition for canceling the fuel injection-stop engine rotation state during detection of the current status of the oxygen concentration measurement unit in said step (a), and controlling the internal combustion engine and the motoring structure to cancel the fuel injection-stop engine rotation state on completion of the detection of the current status. - View Dependent Claims (15, 16)
- an internal combustion engine that is operable independently of a rotating state of a driveshaft;
Specification