Abstract: A remote-control unit for vehicles in which an immobilizer facility and keyless entry facility are united to enable bidirectional transmission. Further, a cost reduction is achieved by decreasing the number of parts, and labor required for maintenance is diminished. A remote-control unit for vehicles includes a circuit 16 for receiving a cryptographic code CR from a vehicle when a key 10 is fitted into a key cylinder 21, a circuit 17 for storing a cryptographic code, a control circuit for producing a first cipher system code CS1 in response to a cryptographic code, and producing a second cipher system code CS2 in response to actuation of a manual switch 12, and a transmission circuit 15 for transmitting the cipher system codes in the form of radio waves to the vehicle.

Abstract: An antitheft apparatus for a motor vehicle can allow operation of an internal combustion engine of a motor vehicle to be started notwithstanding of decision of discrepancy in an engine start enabling signal ascribable to transient error in communication between a code collating means and an engine start decision means. An identification code stored in an engine key (1) is read out upon every starting of operation of the motor vehicle to be collated with a preset identification code to thereby make decision as to whether or not both of the identification codes coincide with each other. Upon decision of coincidence, the identification code as read out is affixed with a rolling code which is updated every time the engine of the motor vehicle is operated, to thereby generate an engine start enabling signal. Means are provided for sending the engine start enabling signal and for generating the rolling code. The rolling code as generated is sent to the rolling code adding means (30b).

Abstract: An antitheft apparatus for an automobile includes an engine starting key storing an identification code allocated inherently, a code reading circuit for reading out the identification code from the engine starting key inserted in a key cylinder installed on the automobile, a code collating circuit for collating the identification code supplied from the code reading circuit with a verification code stored previously, and an engine start decision circuit for enabling engine starting operation when the identification code coincides with the verification code, while upon occurrence of a discrepancy between the identification code and the verification code, for enabling the engine starting operation only when a door or accelerator pedal of the automobile is actuated in a predetermined manner. The automobile can be operated even when the key is lost or damaged and the identification code is unavailable.

Abstract: A vehicle cruise control system includes a voice instruction inputting element 11. A driver inputs a desired voice instruction, which is digitally compared with several previously recorded voice instructions to identify the input instruction and alter the vehicle speed, cancel or resume the cruise control, etc. Manual control switch manipulation is thus avoided.

Abstract: A constant speed running device controls a vehicle speed, which includes a running condition setting member for setting an aimed vehicle speed for at least one of the constant speed control, an acceleration condition and a deceleration condition. The device further includes control member to calculate controlled variables for controlling the vehicle speed in accordance with a deviation between the actual running speed detected by a vehicle speed sensor and the aimed vehicle speed. The running condition setting member sets the aimed vehicle speed to the actual running speed when a predetermined period of time elapses after at least one of operations of the acceleration condition and deceleration condition.

Abstract: A cruise control apparatus for a vehicle can control an automatic transmission such that gear shifting is carried out in accordance with a running resistance of the vehicle while taking account of the slope of a road and the weight of the vehicle, thereby allowing proper and desired speed control. A speed deviation calculator 24 calculates, based on a speed signal and a target speed signal, a deviation between the target speed and the actual vehicle speed and generates a corresponding speed deviation signal. A control quantity calculator 25 calculates a control quantity Tn for controlling a driving force of the vehicle based on the acceleration signal and the speed deviation signal. A throttle valve actuator 11 drives the throttle valve 29 based on the control quantity Tn. A control quantity integrator 27 integrates the control quantity Tn with respect to time based on an output signal from a gear change determiner 26 to thereby simulate a change in the driving force of the vehicle.

Abstract: A running control apparatus for an automobile prevents an abnormal running state by depressing a brake pedal even when a fault takes place in the component(s) of the control apparatus. When a detected brake pedal depression stroke exceeds a predetermined value, an electric power supply to a throttle actuator is interrupted to thereby allow a throttle valve to assume a fully closed position.

Abstract: In a constant speed driving device in which an amount of control of a throttle actuator for driving a throttle valve is calculated by using a control constant so that an actual vehicle speed reaches an aimed vehicle speed, the control constant is changed according to parameters corresponding to the effective operation and non-effective operation of a pressure-charger. Thus, with the device, the constant speed driving operation is achieved suitably independently of the operating conditions of the pressure-charger.

Abstract: A cruise control apparatus for a vehicle includes an automatic transmission with a predetermined gear shift characteristic for automatically shifting a gear ratio based on a relationship between the speed of the vehicle and the opening degree of a throttle valve. The apparatus is able to prevent an unwanted gear shift in the automatic transmission during cruise control without requiring a throttle sensor output indicative of the opening degree of a throttle valve. A vehicle speed sensor senses the actual speed of the vehicle and generates a corresponding output signal. A cruise control instructor generates an instruction signal for instructing a specific one among various cruise control modes. A cruise controller performs cruise control on the vehicle based on the actual vehicle speed as sensed by a vehicle speed sensor and the output signal from the cruise control instructor.

Abstract: A constant-speed driving control device having an output abnormality detection means in a control unit which detects any output abnormality of command switches from the changed state of the switches.

Abstract: A vehicle constant-speed cruising device, in which, with respect to the pulse width of a pulse signal for an actuator adapted to operate an engine throttle valve, acceleration and deceleration signals given during a predetermined past period of time are stored, to estimate cable-layout hysteresis and correct it. Thereby, the vehicle speed is improved in maintenance and in convergence, thus making it comfortable to ride in the vehicle.

Abstract: A cruise control apparatus for a vehicle is effective to prevent hunting in the vehicle speed and resultant shocks which are apt to occur when the vehicle is travelling on a down slope under cruise control. A cruise control unit is adapted to be actuated by a driver of the vehicle for automatically controlling the opening degree of a throttle valve so that the speed of the vehicle is maintained at a predetermined target speed. A fuel control unit controls the fuel supply to the vehicle engine such that the fuel supply is cut off when the throttle valve is moved to a fully closed or idling position thereof with the number of revolutions per minute of the engine being equal to or greater than a predetermined value during cruise control. In one aspect, the fuel cut-off is cancelled when the speed of the vehicle decreases below a predetermined lower limit for the target speed during cruise control, and at the same time, the cruise control is temporarily interrupted for a predetermined length of time.

Abstract: A cruise control apparatus for a vehicle periodically adjusts the opening of a throttle valve based on the function K..epsilon.+G..alpha., wherein .epsilon. is the deviation of the vehicle speed from a target value, .alpha. is the vehicle acceleration, K is a constant, and G is a variable control coefficient. G increases with an increase in the length of time since a change in the sign of acceleration or the length of time since a change in the sign of the rate of change of acceleration.

Abstract: A cruise control apparatus for a vehicle is disclosed which is free from influences resulting from variations in the ground voltage level as well as variations in the voltage in the power supply so as to effectively prevent malfunctions of the apparatus and hence enhance reliability in operation. To this end, the cruise control apparatus includes cruise control switches such as a cancellation switch, a set/coast switch, a resume/acceleration switch, etc., which are provided on the steering wheel of the vehicle and which are connected in parallel with each other. The cruise control switches have an output terminal and an input terminal, the switches being selectively operated to change the output voltage at the output terminal so as to provide a plurality of command signals for cruise control. A control unit is connected to the output terminal of the cruise control switches through the intermediary of a slip ring for performing a cruise control operation in response to the cruise control command signals.

Abstract: An improved cruise control apparatus for a vehicle having a fail-safe function is provided in which indefinite operations of the apparatus at the time of failure in the power supply thereof can be avoided. A cruise control switch has a plurality of switch elements connected in parallel with each other, the switch elements being selectively operated to change the output voltage at the output terminal of the cruise control switch so as to provide a plurality of command signals for setting and cancelling cruise control. A control unit is connected to the output terminal of the cruise control switch for performing a plurality of different cruise control operations in response to the cruise control command signals from the cruise control switch. The control unit includes a plurality of comparators each having a first input terminal connected to the output terminal of the cruise control switch and a second input terminal supplied with a reference voltage.

Abstract: An improved fail-safe device for a motor vehicle speed governor of the type having a control system to switch a supply of power to an actuator ON and OFF for the control of the traveling speed of a motor vehicle to keep a constant speed. A latch is connected to power supply control circuit which controls the power supply to an actuator. The actuator actuates a throttle valve in an intake manifold of an engine for providing constant speed travel by turning the throttle valve ON and OFF in accordance with an output of the latch. The latch is set with a command signal and reset with a cancel signal or a reset signal. The resetting of the latch is executed if an absence of a watch dog signal is detected or a change of output generating status of the latch is detected under certain conditions. The state of the latch can be maintained if the conduction of a switching circuit for the actuator is detected regardless of a command signal to start up the constant speed traveling.

Abstract: A cruise control apparatus for a vehicle is disclosed which is highly reliable in operation and in which a target speed stored can be checked, and if there is any error in the stored target speed, cruise control is automatically inhibited or cancelled. In one embodiment, the vehicle speed sensed by a speed sensor is stored in a first area of a RAM as a first target speed and in a second area as a second target speed. A comparator compares the first target speed and the second target speed and outputs either one of the target speeds as a final target speed if the target speeds are equal to each other but outputs the lower one of the target speeds as the final target speed if there is disagreement therebetween. A cruise controller connected to receive the output of the comparator is adapted to be externally set into operation for controlling a throttle actuator in such a manner that a throttle valve is moved to a target degree of opening which corresponds to the final target speed.

Abstract: A constant-speed running apparatus for a vehicle comprising a throttle-valve actuator for activating a throttle-valve opening angle of a vehicle engine, a constant-speed running controller for controlling the throttle-speed running, a continuously variable transmission (CVT) which is constructed in a power transmission path of the vehicle engine, and a CVT controller for controlling a transmission-ratio of the CVT; further comprising a detecting element constructed in the constant-speed running controller for a control efficiency of the constant-speed running for detecting an acceleration demand of a driver and for informing the CVT controller of the demand; and further comprising a correction element for calculating a corrected transmission-ratio as a corrected vehicle acceleration corresponding to a target vehicle accelerating force on the basis of the acceleration demand detected by the detecting element.

Abstract: A constant speed holding apparatus which, once a vehicle speed is set, maintains the cruise of the vehicle at constant speed by both variable speed control and throttle control. The difference between the set speed and actual speed is detected during vehicle cruise, and if the difference is smaller than a predetermined minute value, the variable speed ratio at the time of the detection is maintained by a correction means so that any possible speed vibration due to mutual interference between variable speed control and throttle control is effectively prevented.

Abstract: A constant speed holding apparatus for maintaining constant vehicle speed by both variable speed control and throttle control, when setting the vehicle speed, wherein, upon detection of a point of time at which set vehicle speed is stored or a specified period of time thereafter, correction is made so that the variable speed ratio at the time immediately prior to the detection is taken as a target variable speed ratio, whereby any possible trouble of overshoot and undershoot with the vehicle speed at the time of speed setting or at a point of time thereafter is prevented so that stable cruise of the vehicle at constant speed is made possible.