Patent ID: 9663103
Date: 2017-05-30
CPC Classifications: B60W,F02D,F02N,Y02T,Y10S

Claim:
1. A vehicle comprising: an engine; a motor; a battery configured to store an electric power for driving the motor; and an electronic control unit (ECU) configured to control the engine and the motor in a selected one of the following modes: (i) a charge sustaining mode in which the engine is allowed to be driven to hold a state of charge of the battery within a predetermined range, and (ii) a charge depleting mode in which the engine is not allowed to be driven to hold the state of charge of the battery within the predetermined range, wherein the ECU is configured to determine whether a current mode is the charge sustaining mode or the charge depleting mode, the ECU being configured to execute a first determination to determine that an engine malfunction has occurred when the number of times of abnormal combustion occurring during a current trip is equal to or larger than a threshold, during the charge sustaining mode, and the ECU being configured to execute a second determination to determine that the engine malfunction has occurred when the cumulative number of times of abnormal combustion is equal to or larger than the threshold, the second determination being executed instead of the first determination during the charge depleting mode, the cumulative number of times of abnormal combustion being obtained by adding the number of times of abnormal combustion occurring during a past trip to the number of times of abnormal combustion occurring during the current trip, wherein the ECU resets the cumulative number of times of abnormal combustion when the cumulative number of times of rotation of the engine since the past trip reaches a predetermined number of times of rotation; the number of times of abnormal combustion occurring during the current trip is stored in the ECU, and the stored number of times of abnormal combustion is used as the number of times of abnormal combustion occurring during the past trip at a next trip; the number of times of abnormal combustion occurring during the current trip is reset by the ECU after being stored in the ECU.