Honda Motor Co., Ltd.

Yoshiyuki Nagayama

Shinichi Nishio

Kazuyoshi Wakita

Hiroyuki Takeo

Takehiro Katakura

Kenji Nakajima

Hiroyuki Kushiyama

Hiroshi Terayama

When a select lever is in a drive range, a microcomputer reads a value of an output voltage by a switch-operation-signal output circuit after detecting that both shift-up switch and shift-down switch are substantially simultaneously turned on, checks whether or not the output voltage by the switch-operation-signal output circuit is the output voltage indicating that the switch after a predetermined time has elapsed is in a normal condition, and only when the output voltage is such an output voltage, permits a manual mode of an automatic transmission and when the output voltage is not such an output voltage, cancels the manual mode.

Control device for automatic transmission

A control device for a hydraulic automatic transmission for a vehicle, including start control device for supplying a hydraulic pressure to a first hydraulic engaging element for a low-speed position and a second hydraulic engaging element for a high-speed position in performing in-gear control by a select operation from a nonforward range to a forward range, thereby first setting a shift position to the high-speed position and next switching the high-speed position to the low-speed position; temperature detecting device for detecting the temperature of a power train; and high-speed position setting operation inhibiting device for inhibiting a high-speed position setting operation by the start control device in the case that the temperature detected by the temperature detecting device is greater than or equal to a predetermined value.

Control device for hydraulic automatic transmission for vehicle

In a system for controlling an internal combustion engine having a plurality of cylinders and connected to the automatic transmission and mounted on a vehicle and the operation of the engine is switched between full-cylinder operation during which all of the cylinders are operative and cutoff-cylinder operation during which some of the cylinders are non-operative, based on at least the load of the engine, a gradient of road on which the vehicle runs is estimated and the cutoff-cylinder operation is prohibited when the estimated gradient is equal to or greater than a threshold value. With this, it becomes possible to generate sufficient deceleration, when the vehicle runs a downhill during cutoff-cylinder operation, while ensuring to prevent the operator to feel excessive acceleration.

Control system for cylinder cutoff internal combustion engine

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Wako, Japan

Yoshiyuki Nagayama