Honda Giken Kogyo Kabushiki Kaisha

Honda Motor Co., Ltd.

Hideki Machino

Hiroyuki Tokunaga

Yorihisa Yamamoto

Takashi Nishimori

Yutaka Nishi

Shinichi Nishio

Hiroyuki Takeo

Toshiyuki Suzuki

Osahide Miyamoto

Masatoshi Nishina

Yoshirou Tashiro

Hideki Takamatsu

A control apparatus of a vehicular automatic transmission includes a control device designed to control gear changes of the transmission on the basis of operation or control signals from a first manual gearshifting part and a second manual gearshifting part. When it determines a multiple operation of the first and second manual gearshifting parts, the control device executes the operation signal from the first manual gearshifting part.

Control apparatus of vehicular automatic transmission

A data storage apparatus includes a sampling device for sampling data in a predetermined cycle, and a storage device for storing a plurality of items of the data sampled by said sampling device. The data storage apparatus also includes an updating device for updating the plurality of items of the data stored in said storage device to respective ones of the plurality of items of the data, which were sampled at later times than the plurality of items of the data were stored, in respective predetermined updating cycles which are shorter than the updating cycles of the plurality of items of the data which were sampled at respective earlier times.

Data storage apparatus

A vehicular automatic transmission TM has a torque converter TC connected to the engine E and an automatic transmission mechanism (gear trains ) connected to the output side of the torque converter, the drive power from the engine for which gear shifting is performed via the torque converter and the automatic transmission mechanism is transmitted to the wheels and the vehicle is driven. The control apparatus for this automatic transmission mechanism has a towing state presumption device that presumes based on the driving conditions that the vehicle is in a towing state, and a lockup engagement increase mechanism that increases the degree of engagement of the lockup clutch of the torque converter when it is determined via the towing state determination device that the vehicle is in a towing state.

Vehicular automatic transmission apparatus

In a vehicle steering control system, a manual steering input is assisted by a powered actuating steering torque which is given by K(.gamma.-t.sub.d .multidot.d .gamma./dt), where y is a detected yaw rate, K and t.sub.d are coefficients which depend on a vehicle speed, and d/dt denotes a time derivative. The detected yaw rate contributes to reducing the yaw rate of the vehicle. In particular, the coefficient t.sub.d is positive in value in a low speed range, and substantially linearly decreases with the vehicle speed, becoming negative at a certain intermediate vehicle speed. Thus, in a high speed range, when the vehicle is steered in one direction either by external disturbances or by a manual steering input, the detected yaw rate and the change rate of the yaw rate both contribute to the reduction of the yaw rate. However, in a low speed range, when the vehicle is steered in one direction, the detected yaw rate contributes to the reduction of the yaw rate but the change rate of the yaw rate contributes to the increase of the yaw rate. Thus, in a high speed range, the vehicle is made highly immune against external disturbances and the effort required for the manual steering of the vehicle is increased with the increase in the change rate of the yaw rate. Conversely, in a low speed range, the stability of the vehicle is of no concern, and the effort required for the manual steering of the vehicle is decreased with the increase in the change rate of the yaw rate.

Vehicle steering control system

Measurement is made of a time of lapse from the time at which the hydraulic pressure of the hydraulic engaging element on engaging side to be engaged at the time of speed changing has increased to a predetermined pressure. Even if an input and output speed ratio of the transmission does not fall within a predetermined range, i.e., a range between YG(N+1)L and YG(N+1)H, which serves as a basis for judging whether the speed changing has been completed or not, a processing of speed change completion is performed when the above-described value TMSTB-TM has reached a predetermined value YTMUP4, to boost the ON pressure to the line pressure.

Control apparatus for hydraulically operated vehicular transmission

In a vehicle steering control system, an actuating torque is applied to steerable wheels according to a steering torque applied to a steering wheel in a conventional manner, and an additional actuating torque is applied to the steering wheel by an electric motor according to lateral dynamic conditions of the vehicle so as to control the lateral stability of the vehicle even in the presence of external interferences such as crosswind. Such external interferences are detected as a lateral dynamic condition of the vehicle such as the yaw rate of the vehicle, and the steering control system produces a steering reaction which counteracts such a lateral dynamic condition by applying the additional actuating torque to the steerable wheels so that the vehicle may maintain a straight course in spite of such external interferences without requiring any intentional efforts by the vehicle operator. A torque steer arising from the drive force applied to power driven steerable wheels can be also controlled as one form of external disturbances. In particular, by amplifying the steering reaction torque when the drive force is great, it is possible to favorably control the influences of a torque steer under any operation conditions.

In a vehicle steering control system, an actuating torque is applied to steerable wheels according to a steering torque applied to a steering wheel in a conventional manner, and an additional actuating torque is applied to the steering wheel by an electric motor according to lateral dynamic conditions of the vehicle so as to control the lateral stability of the vehicle even in the presence of external interferences such as crosswind. Such external interferences are detected as a lateral dynamic condition of the vehicle such as the yaw rate of the vehicle, and the steering control system produces a steering reaction which counteracts such a lateral dynamic condition by applying the additional actuating torque to the steerable wheels so that the vehicle may maintain a straight course in spite of such external interferences without requiring any intentional efforts by the vehicle operator. In particular, by suppressing the additional actuating torque in an understeer condition, the handling of the vehicle can be improved.

In a vehicle steering control system, an actuating torque is applied to steerable wheels according to a steering torque applied to a steering wheel in a conventional manner, and an additional actuating torque is applied to the steering wheel by an electric motor according to lateral dynamic conditions of the vehicle so as to control the lateral stability of the vehicle even in the presence of external interferences such as crosswind. Such external interferences are detected as a lateral dynamic condition of the vehicle such as the yaw rate of the vehicle, and the steering control system produces a steering reaction which counteracts such a lateral dynamic condition by applying the additional actuating torque to the steerable wheels so that the vehicle may maintain a straight course in spite of such external interferences without requiring any intentional efforts by the vehicle operator. By representing the vehicle with a first-order delay transfer function in regards to its lateral dynamic response for each given steering input, the vehicle operator can handle the vehicle without encountering any substantial resistance even when the steering wheel is turned briskly or at high speed.

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Wako, Japan

Hideki Machino