A driving/braking force manipulation control input of a k-th wheel, which denotes one or more specific wheels among a plurality of wheels of a vehicle, is determined such that a required condition concerning a relationship among a road surface reaction force that may act from a road surface on the k-th wheel on the basis of the detected values or estimated values of a side slip angle and a friction characteristic of the k-th wheel, a feedback control input related to the driving/braking force of the k-th wheel for bringing a difference between a state amount of the vehicle and a reference state amount close to zero, a driving/braking force feedforward control input based on a drive manipulated variable supplied by a driver of the vehicle, and a k-th wheel driving/braking force manipulation control input is satisfied. This arrangement makes it possible to properly control a motion of an actual vehicle to a desired motion while properly considering the characteristics of a road surface reaction force acting from a road surface on a wheel.

Vehicle Control Device

A vehicle disc brake includes pad retainers. The pad retainer includes retainer portions disposed on torque bearing faces, pad spring-back pieces projected from radially inner sides of the retainer portions and disposed on lug piece movably supporting faces, and a connecting piece connecting radially outer sides of the retainer portions. The pad spring-back piece includes a spring-back portion extended from a base end portion thereof and inclined gradually radially inwards from the base end portion towards a distal end portion, so that the distal end portion is allowed to be brought into abutment with the lug piece movably supporting face, in such a state that the lug piece is assembled to the pad guide portion via the pad retainer and a pad abutment portion extended radially outwards from the spring-back portion to be brought into abutment with a radially inner face of the lug piece.

Vehicle disc brake

A vehicle control system reduces vehicle rollback upon brake release. The control system includes a brake system, a vehicle grade measurement device and a controller that modulates applied brake pressure of the brake system based on a grade measurement of the grade measurement device. The controller actuates brake-hold device communicating with the brake system based on the grade measurement through pulse width modulation. The control system communicates with a motor generator and an engine to provide a start power to the engine upon brake release based on the grade measurement. Fuel injectors of the engine are enabled upon brake release based on the grade measurement. The control system further communicates with a transmission forward clutch to provide selective rotational communication between the transmission and the engine based on the grade measurement.

Anti-rollback control via grade information for hybrid and conventional vehicles

An engine control device capable of accurately detecting the missing of crank pulses and the erroneous detection of the crank pulses due to generation of noise, wherein a tooth-less part on the outer periphery of a toothed crankshaft for feeding the crank pulses, the erroneous detection of the crank pulses is detected by using the instantaneous value of the rotational speed of the crankshaft calculated by using the crank pulses from the tooth-less part and the teeth across the tooth-less part, and since the instantaneous value of the rotational speed of the crankshaft calculated by using the crank pulses is suddenly decreased and then suddenly increased when the crank pulses are less detected erroneously, the number of the crank pulses less detected is detected by using the number of the crank pulses during that time and, since the instantaneous value of the rotational speed of the crankshaft is suddenly increased and then suddenly decreased when the number of the crank pulses is more detected erroneously, the number of the crank pulses more detected is detected by using the number of the crank pulses during that time.

Engine control device

PROBLEM TO BE SOLVED: To provide a means capable of fully scavenging the interior of a cylinder during an idle stop and enhancing startability on an engine restart for an idle stop engine. SOLUTION: An engine E making an idle stop is automatically stopped when an engine stop condition is satisfied. When an engine restart condition is satisfied, a fuel/air mixture in the cylinder 3 stopped at a compression stroke is burned to reversely rotating a crankshaft 6, and afterwards, the fuel is injected into the other cylinder 3 stopped at an expansion stroke to be ignited, and the engine E is automatically restarted. At the time of a temporary stop or the like of a vehicle, when vehicle speed falls down to the speed to start increasing idle revolution or below before the engine stop condition is satisfied, the engine speed is corrected to be increased for promoting scavenging. When a brake liquid pressure is low, correction of the engine speed to increase is restrained comparing to the condition where it is high so as to prevent an occupant from feeling an incongruity with an increase of the engine speed. COPYRIGHT: (C)2008,JPO&INPIT

Stop control device for engine

PROBLEM TO BE SOLVED: To hold braking force for preventing the movement of a vehicle in stopping the vehicle and solve problems with abnormal noises to be generated when reducing the held braking force in starting the vehicle. SOLUTION: Solenoid valves 80, 90 are provided in brake hydraulic passages 74, 75 joining a master cylinder to wheel cylinders, namely, a plurality of calipers 76, 76. The solenoid valves 80, 90 are put into closed conditions at stopping the vehicle 1 to hold the braking force in the brake hydraulic pressure passages 74, 75 on the sides of the wheel cylinders for preventing the movement of the vehicle 1. On the other hand, when the solenoid valves 80, 90 are put into opened conditions at starting the vehicle 1 to reduce the held braking force, controlled variables for the solenoid valves 80, 90 are preset at values allowable for suppressing the movement of the vehicle 1 with creeping force at starting the stop of the vehicle 1 so that braking pressure reduced with the braking pressure releasing operation of a driver is not braking pressure or lower allowable for suppressing the movement of the vehicle 1 with the creeping force. Thus, unpleasant abnormal noises are suppressed or avoided, which are possibly generated in the vehicle constructed to be kept from movement even during unexpectedly slacking braking operation of the driver when reducing the braking force being held at the time of starting the vehicle. COPYRIGHT: (C)2004,JPO&NCIPI

Braking force holding device for vehicle

PROBLEM TO BE SOLVED: To fully secure functions of a brake booster and fully achieve an aim of idle stop by varying a reference pressure in the brake booster used for determining whether idle stop should be forcibly released or not in accordance with the road gradient SOLUTION: In an idle stop vehicle 1, an engine 10 is automatically stopped when an engine stop condition is established at stop of the vehicle, and the engine 10 is automatically started when the engine start condition is established after that The brake booster 72 with the usage of an intake negative pressure of the engine 10 is provided between a brake pedal 71 and a master cylinder 73, and the engine 10 is forcibly started when the negative pressure introduced into the brake booster 72 at automatic stop of the engine 10 exceeds a predetermined reference pressure The reference pressure is lowered when the road gradient is steep compared to the one when the load gradient is gentle COPYRIGHT: (C)2004,JPO&NCIPI

Automatic engine stopping and starting device for vehicle

PROBLEM TO BE SOLVED: To stably suppress brake noise regardless of the magnitude of braking force while upsizing of a device is inhibited. SOLUTION: A disk brake device 100 is equipped with an annular disk rotor 10 fixed to an axle, a pad member 20 which makes contact with the disk rotor 10 in the axle direction, and a caliper 30 which movably supports the pad member 20 in the axle direction and suppresses circumferential and radial movements of the disk rotor 10, wherein the caliper 30 is equipped with a fixing section 31 for fixing the caliper 30 to car body side and a cylinder mechanism 32 pressing the pad member 20 to the disk rotor 10 from the axle direction, the pad member 20 is equipped with a projection section 23 projected in radial inner direction, and the caliper 30 is equipped with a groove section 35 housing the projection section 23 and restricting the movement of the projection section 23 toward a trailing side or a leading side and a radial restricting section restricting the movement of the pad member 20 toward the radial outer direction. COPYRIGHT: (C)2010,JPO&INPIT

Disk brake device

Provided is an electric brake system which is capable of stopping a vehicle at the will of a driver, even if one brake device among left and right brake devices is in a failed state. The electric brake system is provided with: at least one pair of brake devices which are provided to the left and right sides of a vehicle, are configured so as to propel pistons for pressing, against rotational members that rotate in conjunction with wheels, frictional members, and are configured such that the frictional members are pressed against the rotational members by electric mechanisms in accordance with braking request signals, and the pressing force of the frictional members is maintained; and a control device which controls the respective electric mechanisms of the brake devices, and diagnoses a failed state, i.e. a state in which an abnormality has occurred, in the respective brake devices corresponding to the braking request signals. The control device is configured such that, when it is diagnosed that one brake device among the left and right brake devices is in a failed state, operation of the one brake device by the electric mechanism is prohibited during travel.

Electric brake system

PROBLEM TO BE SOLVED: To provide an automatic stopping/starting of a vehicular engine for releasing stopping of the engine according to a vehicle stopping state without arranging a road surface gradient sensor. SOLUTION: In this automatic stopping/starting of the vehicular engine, when stopping a vehicle, the engine is automatically stopped when a prescribed engine stopping condition is realized, and after automatically stopping the engine, the engine is started by releasing automatic stopping of the engine when a prescribed engine starting condition is realized. A value smaller by a prescribed quantity than a reference value is set as a threshold value as the engine starting condition with a stepping operation quantity of a brake pedal detected at vehicle stopping time as the reference value. COPYRIGHT: (C)2004,JPO&NCIPI

Michiharu Okada

Papers

Braking force holding device for vehicle

Automatic engine stopping and starting device for vehicle

Disk brake device

Electric brake system

Automatic stopping/starting of vehicular engine