Toyota Jidosha Kabushiki Kaisha

Takayuki Otsuka

Hiroki Ichinose

Nobuaki Kayanuma

Kouichi Osawa

Rentaro Kuroki

Kenji Harima

Tatsumasa Sugiyama

Katsuhiko Teraoka

Hironori Okamizu

Chikao Kunimasa

Toru Kidokoro

Nobuyuki Kobayashi

Takashi Kawai

Akinori Osanai

Yoshihiko Hyodo

Toshinari Nagai

Yasuyuki Irisawa

Yukio Kinugasa

Takashi Tsunooka

Hiroshi Kanai

Masaaki Tanaka

Hideo Kobayashi

Takaaki Itoh

Tadayuki Nagai

Yasuhiro Kuze

Michio Furuhashi

Noriyasu Kobashi

Yoshiaki Atsumi

Koji Okawa

Hiromasa Hashimoto

Toshihiro Fukumasu

Sigemitu Iisaka

Kenichi Uchida

Yuichi Goto

Hiroki Matuoka

In the present invention, a first regeneration process is executed as a process for oxidizing and removing PM accumulated on the particulate filter if a measured value of a differential pressure sensor is not more than a predetermined upper limit value, assuming that the measured value of the differential pressure sensor is a value to be provided in a state in which only PM is accumulated on the particulate filter, when a difference between an estimated PM accumulation amount estimated from an operation history of an internal combustion engine and a PM accumulation amount calculated from the measured value of the differential pressure sensor is not less than a predetermined threshold value, while a second regeneration process is executed without executing the first regeneration process if the measured value is larger than the predetermined upper limit value.

Control apparatus for exhaust gas purification system

A vehicular damping control system that executes damping control that suppresses sprung mass vibration in the vehicle by controlling a power source mounted in a vehicle changes the control mode of the damping control according to the operating range of the power source. Changing the control mode of the damping control according to the operating range of the power source enables the vehicular damping control system to improve coordination between the damping control and other control related to the power source, for example, and thus execute appropriate damping control.

Vehicular damping control system

A vehicle controlling apparatus that performs vehicle body vibration-damping control to suppress vibration occurring in a vehicle body by changing wheel torque of driving wheels by controlling output torque of an engine, wherein an electronic control unit is provided with a vehicle body vibration-damping control inhibiting unit that inhibits the vehicle body vibration-damping control such that a drive system of a vehicle, which transmits power of the engine, does not resonate with execution of the vehicle body vibration-damping control, or/and a vehicle body vibration-damping control adjusting unit that adjusts a control amount of the vehicle body vibration-damping control in a direction to suppress a vibration-damping suppression effect of the vehicle body vibration-damping control.

Vehicle controlling apparatus

An apparatus for detecting imbalance abnormality in an air-fuel ratio between cylinders in a multi-cylinder internal combustion engine comprises a turbocharger, a bypass passage, a waist gate valve, an air-fuel ratio sensor, and a stepless transmission. The imbalance abnormality is detected based upon a variation degree in output of the air-fuel ratio sensor. The internal combustion engine and the stepless transmission are controlled in such a manner that an actual operating point of the internal combustion engine moves on a predetermined operating line in a coordinate system defined by an engine rotational speed and engine torque. The operating line is changed in such a manner that, when the actual operating point is outside of a waist gate valve opening region at the time of detecting the imbalance abnormality, the actual operating point moves into the waist gate valve opening region.

Apparatus for detecting imbalance abnormality in air-fuel ratio between cylinders

A stop-start control apparatus for a port injection engine () including cylinders () stops the engine () by stopping fuel injection from each injector (), when a predetermined stop condition is fulfilled. An estimated position of a piston () in each cylinder () after the engine () is stopped is determined during a stop process period from when the predetermined stop condition is fulfilled until when the engine () is stopped, and a compression stroke cylinder in which the piston () is to be stopped in a compression stroke is identified. An amount of fuel to be injected from the injector () for the compression stroke cylinder during the stop process period is set based on the estimated position of the piston () in the compression stroke cylinder. The injector () injects the fuel in the set fuel amount so that the fuel is contained in the compression stroke cylinder when the engine is stopped.

Stop-start control apparatus and method for an internal combustion engine

The stop-start control apparatus () is applied to the spark ignition type internal combustion engine (), stops the internal combustion enginein a case that a prescribed stop condition is fulfilled, and restarts the internal combustion engine () in a case that a prescribed restart condition is fulfilled. The control apparatus cuts spark ignition for the internal combustion enginein response to the fulfillment of the stop condition, and carries on fuel supply to the internal combustion engine (). When a restart condition is fulfilled after the fulfillment of a stop condition and prior to a complete stop of the internal combustion engine (), the control apparatus restarts the internal combustion engine () by resuming spark ignition for the internal combustion engine () in order that fuel supplied after the fulfillment of the stop condition burns.

Stop-start control apparatus for internal combustion engine

An engine system with a thermal storage device is capable of efficiently supplying heat from a thermal storage device to an internal combustion engine. The engine system equipped with the thermal storage tank supplies the hot water stored in the thermal storage tank to a cylinder head of the internal combustion engine before the starting thereof. At this time, an electronic control unit sets a target value of the temperature of the internal combustion engine at the start of the hot water supply in such a manner that the lower the temperature of the internal combustion engine, the lower the target value becomes. As a result, a variation in combustion states between cylinders can be suppressed at the starting of the internal combustion engine.

Engine system with a thermal storage device, and engine temperature raising method

An engine system that includes an internal combustion engine and a heat accumulating device also includes a heat accumulator that accumulates heat by storing a heated cooling medium, a heat supplying device that supplies the cooling medium accumulated in the heat accumulating device to the engine, a cooling medium temperature detector that measures the temperature of the cooling medium, and a controller that carries out failure determination of the heat accumulating device according to various techniques.

Internal combustion engine with heat accumulating device and method of controlling same

An air-fuel ratio control device for an internal combustion engine of a vehicle is disclosed. The device controls the air-fuel ratio with a target value which is larger than the stoichiometric air-fuel ratio, as a control center, in an idle condition. The target value is changed to become small when an amount of intake air in an idle condition is larger than a predetermined value.

Air-fuel ratio control device for internal combustion engine

An onboard load control apparatus and a method for detecting a fault of an onboard electrical load with high accuracy are disclosed. The control apparatus comprises an onboard battery mounted on an automotive vehicle, an electrical heater for electrically heating an electrical load such as an electrically-heated catalyst supplied with power from the onboard battery, an auxiliary relay for turning on/off the power to the electrical heater from the onboard battery, and an ECU for controlling the on/off operation of the auxiliary relay. The apparatus further comprises an engine speed detector for detecting the engine speed of the internal combustion engine and a fault judgement unit for judging whether the electrical heater is normal or faulty on the basis of the fluctuation amount of the engine speed of the internal combustion engine detected by the engine speed detector before and after switching the auxiliary relay. A fault of the electrical load is judged by detecting the voltage across the onboard battery while taking the fluctuation amount of the same voltage into consideration. The apparatus further comprises a load condition holder for holding the load condition of a specific load while the engine speed or the battery voltage is detected.

Automotive onboard load control apparatus and method

A device for detecting leakage of fuel vapor including a pressure sensor which is arranged in a fuel vapor conduit connected to the fuel tank. The pressure sensor detects the pressure inside the fuel tank. It is judged that the fuel vapor has not leaked from the fuel tank or the fuel vapor conduit before the engine is stopped based on the pressure inside the fuel tank detected by the pressure sensor and it is judged that the reattachment of the fuel cap has been forgotten when it is judged that the fuel vapor is leaking from the fuel tank when the operation of the engine is restarted after stopping of the engine.

Device for detecting leakage of fuel vapor

A malfunction detecting apparatus of an evaporated fuel purge system includes: a negative pressure control part for switching on a purge control valve to open a purge line between a canister and an intake passage of an engine during a process time, and for switching off the purge control valve at the end of the process time, so that the purge line and a vapor line are subjected to a negative pressure of the intake passage; a pressure detecting part arranged in a line connected to the purge line and to the vapor line for measuring a purge line pressure within the system and for outputting the measured pressure; and a discriminating part for detecting whether or not a malfunction in the system has occurred, based on the measured pressure supplied from the pressure detecting part, for calculating a continuous time during which the measured pressure is continuously lower than a reference pressure value within the process time, and for detecting whether or not the continuous time exceeds a reference time value within the process time.

Apparatus for detecting a malfunction in an evaporated fuel purge system

In a diagnostic apparatus for an evaporative fuel purge system having a canister receiving fuel from a fuel tank via a vapor passage, the fuel being supplied to an intake air passage of an internal combustion engine via a purge passage from the canister, a pressure detecting unit detects a pressure in the evaporative fuel purge system. A decision making unit determines whether or not a failure has occurred in the evaporative fuel purge system on the basis of a relationship between the pressure detected by the pressure detecting unit and a decision value. A correction unit corrects the relationship on the basis of a value of a parameter having an influence on the pressure detected by the pressure detecting unit.

Diagnostic apparatus for evaporative fuel purge system

An apparatus for detecting a malfunction in an evaporated fuel purge system, includes a diagnosis control valve provided in an air inlet passage connecting an air inlet of a canister to the atmosphere, a pressure sensor provided at an intermediate portion of a vapor passage between a fuel tank and a purge control valve for sensing a pressure in the vapor passage, and a control part for controlling opening and closing operations of both the purge control valve and the diagnosis control valve. In this apparatus, the purge control valve is opened and the diagnosis control valve is closed by the control part under a predetermined operating condition of an engine, the purge control valve being closed after the vapor passage is subjected to a negative pressure in an intake passage of the engine, the negative pressure being maintained during a predetermined time period, the apparatus thus detecting whether or not a malfunction has occurred in the system, in response to a difference between pressures sensed by the pressure sensor respectively at a beginning of the predetermined time period and at an end thereof.

Apparatus for detecting malfunction in evaporated fuel purge system

A malfunction detection apparatus for detecting a malfunction in an evaporative fuel purge system, which malfunction detection apparatus is able to suppress a fluctuation of an air-fuel ratio. A negative pressure inside an intake passage is introduced into the evaporative fuel purge system. The existence/nonexistence of a malfunction in the evaporative fuel purge system is determined by using pressure values inside the evaporative fuel purge system which values are detected and supplied by a pressure detecting unit. The apparatus is provided with an air-fuel ratio fluctuation suppressing unit for suppressing a fluctuation of the air-fuel ratio of air suctioned into an engine when introducing the negative pressure into the evaporative fuel purge system.

Growing community of inventors

Susono, Japan

Takayuki Otsuka