摘要:
Vehicle braking system including a vacuum booster for transmitting a boosted brake operating force to a master cylinder such that the boosting ratio is reduced at a fixed transition point before the boosting limit point is reached, a brake having a wheel brake cylinder connected through a fluid passage to a master cylinder serving as a first hydraulic pressure source, for braking a wheel, and a pressure increasing device having a second hydraulic pressure source connected to the fluid passage, and wherein the pressure increasing device initiating a pressure increasing operation, when the brake operating force has increased to the transition point, to increase the wheel cylinder pressure to be higher than the master cylinder pressure, by using the second hydraulic pressure source.
摘要:
A vacuum booster apparatus used for a brake apparatus positively decreases a degree of opening of a throttle valve when it is required while an unnecessary decrease in the degree of opening of the throttle valve is positively prevented. A first pressure chamber of a vacuum booster is connected to an intake pipe of the engine on a downstream side of a throttle valve. A second pressure chamber of the vacuum booster is selectively connectable to one of the first pressure chamber and atmosphere. The vacuum booster boosts an operating force applied to a brake operating member based on a pressure difference between the first pressure chamber and the second pressure chamber. A throttle-opening-degree control device controls a negative pressure in the first pressure chamber by controlling the degree of opening of the throttle valve. The throttle-opening-degree control device decreases the degree of opening of the throttle valve only for a limited time when the negative pressure in the first pressure chamber is smaller than a predetermined necessary negative pressure determined by an operating-force relating amount related to the operating force applied to the brake operating member.
摘要:
A vacuum booster apparatus used for a brake apparatus positively decreases a degree of opening of a throttle valve when it is required while an unnecessary decrease in the degree of opening of the throttle valve is positively prevented. A first pressure chamber of a vacuum booster is connected to an intake pipe of the engine on a downstream side of a throttle valve. A second pressure chamber of the vacuum booster is selectively connectable to one of the first pressure chamber and atmosphere. The vacuum booster boosts an operating force applied to a brake operating member based on a pressure difference between the first pressure chamber and the second pressure chamber. A throttle-opening-degree control device controls a negative pressure in the first pressure chamber by controlling the degree of opening of the throttle valve. The throttle-opening-degree control device decreases the degree of opening of the throttle valve only for a limited time when the negative pressure in the first pressure chamber is smaller than a predetermined necessary negative pressure determined by an operating-force relating amount related to the operating force applied to the brake operating member.
摘要:
A vacuum booster apparatus used for a brake apparatus positively decreases a degree of opening of a throttle valve when it is required while an unnecessary decrease in the degree of opening of the throttle valve is positively prevented. A first pressure chamber of a vacuum booster is connected to an intake pipe of the engine on a downstream side of a throttle valve. A second pressure chamber of the vacuum booster is selectively connectable to one of the first pressure chamber and atmosphere. The vacuum booster boosts an operating force applied to a brake operating member based on a pressure difference between the first pressure chamber and the second pressure chamber. A throttle-opening-degree control device controls a negative pressure in the first pressure chamber by controlling the degree of opening of the throttle valve. The throttle-opening-degree control device decreases the degree of opening of the throttle valve only for a limited time when the negative pressure in the first pressure chamber is smaller than a predetermined necessary negative pressure determined by an operating-force relating amount related to the operating force applied to the brake operating member.
摘要:
A vacuum booster apparatus used for a brake apparatus positively decreases a degree of opening of a throttle valve when it is required while an unnecessary decrease in the degree of opening of the throttle valve is positively prevented. A first pressure chamber of a vacuum booster is connected to an intake pipe of the engine on a downstream side of a throttle valve. A second pressure chamber of the vacuum booster is selectively connectable to one of the first pressure chamber and atmosphere. The vacuum booster boosts an operating force applied to a brake operating member based on a pressure difference between the first pressure chamber and the second pressure chamber. A throttle-opening-degree control device controls a negative pressure in the first pressure chamber by controlling the degree of opening of the throttle valve. The throttle-opening-degree control device decreases the degree of opening of the throttle valve only for a limited time when the negative pressure in the first pressure chamber is smaller than a predetermined necessary negative pressure determined by an operating-force relating amount related to the operating force applied to the brake operating member.
摘要:
Method of diagnosing a booster of a braking system including a brake operating member operated with a brake operating force, a master cylinder for producing a hydraulic pressure on the basis of an input force received from the booster as a result of boosting of the brake operating force by said booster, and a wheel brake cylinder which is activated by the hydraulic pressure produced by the master cylinder, to brake a vehicle wheel, wherein the booster is determined to be abnormal if the detected input and output of the booster do not meet a predetermined nominal relationship therebetween. Also disclosed is a diagnosing device capable of practicing the method.
摘要:
The momentum control apparatus includes: an optimal feedback gain obtaining part for obtaining a plurality of optimal feedback gains used when each of the plurality of actuators is independently actuated to feedback control the momentum of the controlled object; and a feedback gain setting part for extracting a minimum feedback gain out of the plurality of optimal feedback gains obtained by the optimal feedback gain obtaining part as a feedback gain of a control system.
摘要:
The lateral motion control apparatus calculates lateral motion control amounts for a plurality of control targets that operate cooperatively in order to change the lateral motion amount of the vehicle based on a target value for the lateral motion amount of the vehicle, and control the plurality of control targets based on the calculated lateral motion control amounts. Meanwhile, it is determined whether or not the control of the plurality of control targets is to be stopped. When it has been determined that the control of the plurality of control targets is to be stopped, lateral motion degeneration control amounts are determined for each of the plurality of control targets so that the lateral motion control amounts of the plurality of control targets degenerate starting at that time, and the plurality of control targets are controlled based on the determined lateral motion degeneration control amounts.
摘要:
A vehicle dynamic control apparatus is designed to control a plurality of controlled objects according to a request value of a first parameter from an application associated with motion of a vehicle in a same direction to fulfill the request value of the first parameter. An availability obtainer obtains an availability corresponding to a controllable range of a second parameter of each of the plurality of controlled objects, the second parameter being associated with motion of the vehicle in the same direction. A selector determines an order of the plurality of controlled objects to be controlled based on the availability of the second parameter of each of the plurality of controlled objects, and selects at least one of the plurality of controlled objects to be controlled in accordance with the determined order.
摘要:
The lateral motion control apparatus calculates lateral motion control amounts for a plurality of control targets that operate cooperatively in order to change the lateral motion amount of the vehicle based on a target value for the lateral motion amount of the vehicle, and control the plurality of control targets based on the calculated lateral motion control amounts. Meanwhile, it is determined whether or not the control of the plurality of control targets is to be stopped. When it has been determined that the control of the plurality of control targets is to be stopped, lateral motion degeneration control amounts are determined for each of the plurality of control targets so that the lateral motion control amounts of the plurality of control targets degenerate starting at that time, and the plurality of control targets are controlled based on the determined lateral motion degeneration control amounts.