Toyota Jidosha Kabushiki Kaisha

Tadayuki Nagai

Tooru Matsubara

Yoshio Hasegawa

Takashi Kawai

Toshinari Nagai

Masaaki Tanaka

Kenji Harima

Michio Furuhashi

Hiroki Matuoka

Masami Kondo

Sigemitu Iisaka

Yuichi Goto

Yuuichi Gotou

Shigemitu Iisaka

Kunio Morisawa

Zenichiro Mashiki

Hiroki Matsuoka

Makoto Ogiso

Hideyuki Nishida

Tadashi Tamura

Keiji Yoeda

Senji Kato

Takayuki Otsuka

Naoki Moriguchi

Toshinari Ogawa

Akio Murasugi

Katsumi Nakatani

Hirofumi Kamishima

Takanori Sakamoto

A vehicle control device includes: a change gear ratio changing circuit configured to execute an up-shift of a change gear ratio in an automatic transmission; a change gear ratio determination circuit configured to determine whether or not an up-shift condition is satisfied based on a change gear diagrammatic view; a combustion mode determination circuit configured to determine whether or not a switching condition for switching from a predetermined combustion mode, in which an air-fuel ratio of the engine is an air-fuel ratio on a rich side than a lean air-fuel ratio, to a supercharged lean combustion mode, in which the air-fuel ratio of an engine is made to the lean air-fuel ratio while executing supercharging by a supercharger, is satisfied; and a change regulating circuit configured to regulate the change gear ratio changing circuit to execute the up-shift at the time both conditions are satisfied.

Vehicle control device

A control apparatus for a vehicle, wherein the vehicle includes an engine having a turbocharger and an automatic transmission. The control apparatus includes at least one electronic control unit configured to: control an air-fuel ratio of the engine and an operating state of the turbocharger based on a parameter indicating a load of the engine; control the turbocharger to execute turbocharging and operate the engine in a turbocharging lean combustion mode when the parameter is within a predetermined range, an air-fuel ratio set in the turbocharging lean combustion mode being a predetermined lean air-fuel ratio; and operate the engine in a predetermined operation mode instead of the turbocharging lean combustion mode in at least a part of the predetermined range when a downshift is performed in the automatic transmission, an air-fuel ratio set in the predetermined operation mode being a richer air-fuel ratio than the predetermined lean air-fuel ratio.

Control apparatus for vehicle

A vehicle control apparatus () for controlling a vehicle () provided, as a drive system, with: an internal combustion engine () in which a compression ratio is variable; and a transmission () which has a torque converter () and a lockup mechanism () between an input shaft and an engine output shaft () of the internal combustion engine and which can change a ratio between a rotational speed of the input shaft and a rotational speed (Nout) of an output shaft coupled with an axle, is provided with: a first controlling device for changing an operating state of the lockup mechanism in accordance with an operating condition of the vehicle; and a second controlling device for changing the compression ratio in at least one portion of a case where the operating state is changed.

Vehicle control apparatus

A power control device includes: an engine control unit and a transmission control unit provided so as to control power of the engine, and configured such that if an actual operating point, which is an operating point indicating a combination of actual revolution speed and torque of the engine, is located in a non-supercharging region and a final target operating point, which serves as a target operating point during acceleration, is located in a supercharging region, the revolution speed of the engine is increased until the actual operating point is shifted into the supercharging region, and the revolution speed of the engine is decreased after the actual operating point has entered the supercharging region, thereby shifting the actual operating point into the final target operating point when accelerating the vehicle.

Power control device

A take-off control apparatus and method is provided for a vehicle equipped with an automatic transmission having an apply element that is applied when the vehicle takes off from a standstill, which executes a neutral control that releases the apply element when the automatic transmission is in a forward-drive range and the vehicle is stopped with a predetermined condition being satisfied, and executes a neutral cancellation control that cancels the neutral control when a different predetermined condition is satisfied. The take-off control apparatus and method detects an engine speed and calculates an apply hydraulic pressure of the apply element during cancellation of the neutral control based on a fluctuation in the engine speed.

Vehicle take-off control apparatus and method

A control apparatus and a control method for an automatic transmission installed in a vehicle, which detect an inclination of a road on which the vehicle is running; calculate actual torque of an engine installed in the vehicle; store reference torque of the engine; correct an inclination threshold value based on the actual torque and the reference torque and make a determination on whether ascending slope control or descending slope control needs to be performed in the vehicle based on the detected inclination of the road and the corrected inclination threshold value; and control the automatic transmission to perform the ascending slope control or the descending slope control based on the result of the determination. Thus, the control apparatus and the control method make an accurate determination on an ascending slope in a highland area, and accurately perform the ascending slope control or the descending slope control.

Control apparatus and control method for automatic transmission

The ECT_ECU performs a step of determining that an ON failure has occurred in a depressing force switch when the depressing force switch is turned ON while a brake lamp switch is OFF, and setting a flag F; a step of determining whether the brake lamp switch, which is turned OFF at a position on a release side with respect to a depressing force switch setting position, has been turned OFF, when the flag F has been set; and a step of increasing commanded pressure for engaging an input clutch as rapidly as possible, when the brake lamp switch has been turned OFF.

A control apparatus for a vehicle equipped with an automatic transmission having an apply element that is applied when the vehicle takes off from a standstill, which executes a neutral control which releases the apply element when the automatic transmission is in a forward-drive range and the vehicle is stopped with a predetermined condition being satisfied, includes a controller that detects a target idle speed of an engine and determines whether the neutral control can be executed based on the target idle speed.

Control apparatus and method for vehicle

A take-off control apparatus and method is provided for a vehicle equipped with an automatic transmission having an apply element that is applied when the vehicle takes off from a standstill, which executes a neutral control that releases the apply element when the automatic transmission is in a forward-drive range and the vehicle is stopped with a predetermined condition being satisfied, and executes a neutral cancellation control that cancels the neutral control when a different predetermined condition is satisfied. A braking state of the vehicle is detected, and completion of cancellation of the neutral control is determined based on the detected braking state.

In a control apparatus for an automatic transmission, a return control is executed to engage a clutch that has had its engagement pressure lowered and to disengage a brake so as to resume the state of the automatic transmission from the neutral state under a neutral control to the one where the forward speed is established. As the time for the neutral control becomes longer, the decrease in the torque of an output shaft of the automatic transmission becomes gentler. Accordingly an initial value of a control command value for the clutch pressure is decreased with the increase in the neutral control time such that the engagement of the clutch becomes gentler.

Control apparatus for automatic transmission

The invention relates to a control device for an engine able to control at least one of an intake valve and an exhaust valve via a driving mechanism actuated without a torque from an output shaft of the engine, and a transmission connected to the engine. The control device includes a torque transmitting device for reducing the torque from the engine while that torque is being transmitted to an output shaft of the transmission, and control means for controlling the torque transmitting device so as to reduce the torque transmitted from the engine to the output shaft of the transmission during an upshift, controlling a engine speed to a target speed after shifting during the unshift, and controlling the torque transmitting device so as to increase the torque transmitted to the output shaft of the transmission after the engine speed is synchronized with the speed after shifting.

Control device and method for engine and transmission

A fuel injection controller of a cylinder injection engine selects an injection mode from various fuel injection modes including an intake stroke injection mode, in which fuel is injected during an intake stroke, and a compression stroke injection mode, in which fuel is injected during a compression stroke. The controller includes a selector for selecting the compression stroke injection mode when the engine is cool if the temperature of the engine when the engine is started is within a predetermined temperature range and for selecting the intake stroke injection mode when the engine is cool if the temperature of the engine when the engine is started is higher than the predetermined temperature range.

Fuel injection controller for cylinder injection engine

An exhaust purifier for an internal combustion engine is capable of properly heating a catalyst in consideration of a deterioration with time and manufacturing variation in an electric heater that heats the catalyst. The exhaust purifier has the catalyst 4 disposed in an exhaust pipe, the electric heater for forcibly heating the catalyst 4, a power source for supplying power to the heater, an estimate unit for estimating the temperature that the catalyst 4 will reach, a comparator for providing the difference between the estimated temperature and a target temperature, and an operation controller for controlling the operating conditions of the engine according to the temperature difference. The estimate unit measures the voltage and current of the heater, calculates the resistance or power of the heater according to the voltage and current, and estimates the temperature. The operation controller adjusts the quantity of intake air and ignition timing, or adjusts ignition timing and then the quantity of intake air to maintain an engine speed, or, if a battery 6 is abnormal, adjusts the quantity of intake air and ignition timing to increase the temperature of exhaust gas.

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Toyota, Japan

Tadayuki Nagai