Toyota Jidosha Kabushiki Kaisha

Toyota Jidosha Kabushiki

Masashi Takagi

Yuki Minase

Michihito Shimada

Shinya Kodama

Motonari Ohbayashi

Toshihiro Takagi

Hiroshi Shimada

Akihiro Kida

Toshiya Oishi

Tsutomu Miyazaki

Kenichi Okaya

Takamasa Kitamura

Motonari Obayashi

Akito Oonishi

Masato Kaigawa

Akira Nagae

Yasuhiro Saito

Toshio Takaoka

Akito Onishi

Tatsuaki Yokoyama

Hiroyuki Hanamura

Kazushi Hosomi

Masami Aga

Haruhiko Katsumata

Hirotada Ohtake

Mitsuyoshi Yokokawa

A vehicle is equipped with an auxiliary that is driven by the output of an internal combustion engine and which is capable of obtaining drive force by transmitting the output of the internal combustion engine to driving wheels. If an air conditioning compressor is being driven during engine idling of the internal combustion engine, an electronic control apparatus implements output-increase control for increasing the output of the internal combustion engine in comparison to when the air conditioning compressor is not being driven. If the force applied to the accelerator pedal (Pac) is equal to or more than a prescribed value (Pth), output-reduction control for reducing the output of the internal combustion engine by initiating engine idling of the internal combustion engine, and prohibiting the drive of the air conditioning compressor, is implemented.

Vehicle control apparatus

A brake override system (BOS) () prioritizes braking when both an accelerator and a brake are operated simultaneously by reducing the required accelerator operation amount value that is used to control drive force so that it is lower than the actual accelerator operation amount. The BOS () thus achieves a balance between hill-start performance after operation by the BOS () is cancelled and stopping performance during operation of the BOS () by increasing the required accelerator operation amount value at the time at which the return of the required accelerator operation amount value to the actual accelerator operation amount is initiated when the simultaneous operation of the accelerator and the brake ends.

An electronic control unit performs a reduction control for reducing vehicle drive force when the accelerator and the brake are operated simultaneously. The electronic control unit also varies the amount of decrease in the vehicle drive force during the reduction control and conditions under which the reduction control is implemented depending on the order of the accelerator operation and brake operation resulting in the above-noted simultaneous operation. For example, the amount of decrease in the vehicle drive force is less when the brake is operated first in comparison with when the accelerator is operated first. Thus, it is possible to operate the vehicle drive force in accordance with the intention of the driver.

Vehicle control device

An electronic control unit reduces output of an engine using a detection value of an acceleration sensor such that acceleration of a vehicle does not exceed a predetermined threshold value. In a case where there is an abnormality in the acceleration sensor, the electronic control unit sets the acceleration threshold value to be greater than that in a case where there is no abnormality, and the electronic control unit limits the vehicle speed to a predetermined value or slower.

Apparatus for controlling vehicle

An electronic control unit () stops output suppression control for an engine () at the time of simultaneous depression of an accelerator pedal () and a brake pedal () when the depression of the brake pedal () is erroneously detected due to an ON-failure of a stop lamp switch () even if the brake pedal is not depressed.

Vehicle drive control in response to brake detection errors

Disclosed is a vehicle control apparatus which can prevent drivability from being deteriorated. The ECU is operative to determine whether the previously depressed brake is in the 'ON' or 'OFF' state when the vehicle is determined as being not travelling on a bad road, the accelerator being in the &#x201c;ON&#x201d; state, and the brake being in the &#x201c;ON&#x201d; state. When the ECU is operative to determine that the previously depressed brake is in the &#x201c;OFF&#x201d; state, and the vehicle is in the reduced speed state, the ECU is operative to perform the reduction process of the engine output under the condition that the simultaneous depressions of the accelerator and brake pedals are held for less than 10 seconds, and the vehicle speed is 7 km/hr or more. When, on the other hand, the ECU determines that the vehicle is travelling on the bad road, the ECU is operative not to perform the reduction process.

An electronic control unit adjusts drive force generated by an engine in accordance with the amount of manipulation of an accelerator pedal. When the manipulation amount of the accelerator pedal meets a predetermined condition, the electronic control unit executes drive force limiting control for limiting the drive force generated by the engine and changes the degree of limiting of the drive force during the execution of the drive force limiting process according the gradient of the road surface.

Vehicle driving force control device

A drive control apparatus for a vehicle includes: a control unit that controls drive force output from an engine in accordance with operation of an accelerator pedal; and a shift mechanism capable of selectively switching a shift position to a driving position or a non-driving position. The shift mechanism transmits the drive force to wheels when the shift position is in the driving position, and interrupts transmission of the drive force when the shift position is in the non-driving position. The control unit executes a drive force restriction process of reducing the drive force when the shift position is switched from the non-driving position to the driving position while the accelerator pedal is in an on state, and, when the switching is from a neutral position, the control unit changes a mode of reducing the drive force in accordance with a continuation time of the neutral position.

Drive control apparatus for vehicle

Disclosed is a vehicle control apparatus which can prevent the deterioration of drivability. The ECU can set a control accelerator opening degree to be converted when a control permission condition is established. The control accelerator opening degree is equal to or larger than an accelerator lower limit which is larger than an idle determination value for determining an automatic stopping of an engine by an eco-run. The control accelerator opening degree thus set can prevent the drivability from being deteriorated without the automatic stopping of the engine being caused even if the accelerator opening degree is converted to reduce the torque of the engine with the establishment of the control permission condition.

When simultaneous depression of an accelerator pedal () and a brake pedal () is detected, an electronic control unit () inhibits a downshift of an automatic transmission () and performs output suppression control for an engine (), thereby making it possible to suppress the increase of vehicle drive force caused by the downshift and maintain a constant vehicle deceleration rate by an easier operation.

Control device for vehicle

When a driver attempts to hurriedly start driving a stopped vehicle, for example, the driver may, without realizing it, begin operating an accelerator pedal before shifting a shift lever from a non-drive position to a drive position. In such a situation, when the shift lever is shifted from a non-drive position to a drive position while the accelerator pedal is being operated, a drive power limiting process is implemented for limiting the drive power when the drive power is output from a drive source in accordance with the amount that the accelerator is being operated. As a result, when the shift lever is shifted from a non-drive position to a drive position in the abovementioned manner, it is possible to restrict starting of the vehicle, which is caused by the transmission of drive power from the drive source to the wheels. This reduces the strange sensation experienced by the driver.

Vehicle drive control device

When an ECU determines that an accelerator is 'ON' and a brake is 'ON', the ECU determines whether or not the brake previously depressed is &#x201c;OFF&#x201d;. When the ECU determines that the brake previously depressed is &#x201c;OFF&#x201d; and that the vehicle is in the reduced speed state, the vehicle control apparatus is configured to execute an engine output reduction control process under the condition that the simultaneous depressions of the accelerator and brake pedals continues for less than 10 seconds and the vehicle speed is not less than 7 km/hr. When the simultaneous depressions of the accelerator and brake pedals continues for no less than 10 seconds, the ECU is configured to make an output reduction prohibition flag &#x201c;ON&#x201d; and not to execute the engine output reduction control process until a predetermined time elapses.

Provided is a vehicle control apparatus that can prevent the deterioration of drivability. An ECU executes a reduction control when speed reduction of a vehicle is determined as a control permit condition is established, and does not execute the reduction control when the speed reduction is not determined as the condition is not established. Additionally, when determined that a vehicle behavior stabilization control that stabilizes behavior of the vehicle is being executed, the ECU determines the speed reduction of the vehicle by changing a speed reduction threshold value for determining the speed reduction. This makes it possible to adequately determine the speed reduction of the vehicle even when a drive state of the vehicle is changed by the execution of the vehicle behavior stabilization control, thereby allowing the execution and non-execution of the reduction control to be switched reflecting a driver's intention and thus preventing the drivability from being deteriorated.

Vehicle control apparatus for controlling the output reduction of a power source

A brake override system detects a brake operation based on master cylinder pressure when the brake operation followed by an accelerator operation results in simultaneous performance of the accelerator operation and the brake operation. The brake override system detects the brake operation by a brake switch when the accelerator operation followed by the brake operation results in the simultaneous performance of the accelerator operation and the brake operation. Thus, the system may accurately detect the brake operation regardless of the order of the accelerator operation and the brake operation.

A vehicle control apparatus includes a controller that performs control such that an engine output does not increase when a control mechanism and a brake override are operated simultaneously, wherein the control mechanism controls the engine output independently of an accelerator operation amount, and wherein the brake override system reduces the engine output in response to simultaneous operations of an accelerator and a brake.

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Nagoya, Japan

Masashi Takagi