84results about How to "Reduced braking effect" patented technology

A cylinder cutoff control apparatus of an engine initiates a cylinder cutoff mode only when two conditions, namely a low load condition such as a vehicle cruising condition and an intake valve closure timing controlled to a given timing value before a bottom dead center, are both satisfied. A fuel cutoff mode is executed prior to the cylinder cutoff mode. During a transition to the cylinder cutoff mode, the control apparatus holds an intake valve open timing at a given timing value substantially corresponding to a top dead center, simultaneously with reducing an intake valve lift amount of each intake valve, subjected to cylinder cutoff control, to a zero lift. Immediately when the intake valve lift amount is reduced to below a lift threshold value, an exhaust valve lift amount of each exhaust valve, subjected to the cylinder cutoff control, is controlled to a zero lift.

An aircraft landing gear arrangement comprises a nose landing gear assembly and at least one main landing gear assembly. The nose landing gear assembly has a nose landing gear wheel with a high energy brake apparatus therein. The main landing gear assembly has a main landing gear wheel with a high energy brake apparatus therein and a main landing gear wheel with a motor therein. The motor is used for driving the main landing wheel during taxiing of the aircraft.

This invention relates to a rubber composition and a method of manufacturing the same, and particularly to a technique of improving a fracture resistance in a silica-containing rubber composition by improving dispersion of the silica.

A method for braking a vehicle in the context of an emergency stop with the aid of a service braking system and a second braking system. The braking operation can be carried out uniformly and continuously if a positioning member of the service braking system and a positioning member of the second braking system are actuated simultaneously, the braking pressure exerted by the positioning member of the service braking system being reduced in the course of the braking operation, and the braking pressure exerted by the positioning member of the second braking system being increased.

The present invention provides a rubber composition for a tire tread and a tire manufactured with the same. The rubber composition comprises 100 by weight parts of crude rubber and 60-90 by weight parts of silicon dioxide, wherein the crude rubber comprises 30-50 by weight parts of solution polymerization type styrene-butadiene (S-SBR) rubber and 10-30 by weight parts of butadiene rubber (BR). The content of the styrene in the solution polymerization type styrene-butadiene is 15-25% by weight, and the content of the ethenyl in butadiene is 60-65% by weight. According to the solution polymerization type styrene-butadiene rubber, each module end is modified to a hydrophilic group, and the modules are coupled with each other through tin. The rubber composition for the tire tread has the following advantages: reduced lag loss, maximized low combustion consumption performance, excellent braking performance which is normally reduced because of maximization of low combustion consumption performance, improved machining performance in an unvulcanized state, improved bracking performance in the vulcanized state, improved wearing resistance, improved rolling resistance, etc.

Some embodiments of the present invention provide a system comprising: a first controller operable to assume one of a plurality of respective states, in a first state the first controller being configured to generate a first controller powertrain signal in order to cause a powertrain to develop drive torque, and a first controller brake signal in order to cause application of a brake to one or more wheels, the first controller being configured to generate the first controller powertrain signal and first controller brake signal to cause a vehicle to operate in accordance with the target speed value, wherein when the first controller is in a predetermined one or more states the first controller is configured automatically to perform a brake wipe operation in which the first controller generates the first controller brake signal in dependence on one or more predetermined conditions whilst continuing to cause a vehicle to operate in accordance with the target speed value.

The invention discloses an automobile gear-engaging sliding fuel saving device which comprises a rockshaft and a camshaft. A primary rocker arm and a secondary rocker arm are rotationally mounted on the rockshaft, and a primary cam and a secondary cam are arranged on the camshaft. The other end of the primary rocker arm abuts against an inlet valve or an exhaust valve, and a rocker arm connectingand disconnecting device is arranged between the primary rocker arm and the secondary rocker arm and has a sliding connecting state and a non-sliding disconnecting state. The rocker arm connecting anddisconnecting device is connected with an automobile electric control unit, and a protruding part of the secondary cam jacks the secondary rocker arm in an engine compression stroke and power stroke.According to the automobile gear-engaging sliding fuel saving device, when an automobile enters in a gear-engaging sliding state, the secondary cam can drive the primary rocker arm to act in the engine compression stroke to enable the primary rocker arm to open the inlet valve or the exhaust valve, resistance in the engine compression stroke is greatly reduced, the gear-engaging sliding process is effectively prolonged, and the good fuel saving effect is achieved; and an engine still keeps in power connection with wheels, the braking state of the engine can be restored at any time, and the driving safety is improved.

The invention discloses a brake integrating a rotary barrel type eddy current retarder and a drum brake, wherein the brake is used for braking and speed reduction of an automobile. A retarder outer rotor, a brake drum and a coil support are coaxial, and the coil support is located between the retarder outer rotor and the brake drum. A plurality of magnet exciting coils provided with iron cores are fixed on the coil support and are evenly distributed along the circumferential direction of the outer circle of the brake drum, the axial leads of the magnet exciting coils are located in the radial direction of the brake drum, and first gas intervals are formed between the magnet exciting coils and the retarder outer rotor, and second gas intervals are formed between the magnet exciting coils and the brake drum. Two adjacent magnet exciting coils provided with the iron cores, facing to the same gas interval, are opposite in polarity. When the automobile speed is low, a brake shoe enables a friction liner to be pressed towards the brake drum to achieve friction braking; when the automobile runs at a normal automobile speed, the magnet exciting coils are powered on to produce electromagnetic braking torque to reduce the automobile speed, and then the automobile is braked through friction. When the automobile speed is high, electromagnetic braking and friction braking act in a combined mode. Braking thermal failure is avoided, and safety performance of automobile braking is improved.

A friction material for brake including reinforcing fibers, a friction modifier, a lubricant, and a binder, characterized by containing, as a part of the component of the friction modifier, 2 to 5 wt % zeolite, 0.8 to 2 wt % antimony oxide and 0.2 to 1 wt % fluorine based polymer.

The invention discloses an electromagnetic retarder arranged on autocar wheel side and a control method thereof. A shaft coupling is arranged on a transmission shaft; the shaft coupling is connected with a semi shaft of an autocar; a rotatable slewing journal and a brake disc are sleeved outside the transmission shaft; an iron core winded with a winding and a friction detent provided with an ABS are fixed on the slewing journal; a rotation disc face of the brake disc is positioned in the iron core; and the winding is connected with an operation handle by a controller. The controller receives brake signals of the operation handle and speed signals fed back by a sensor, judges that whether the autocar has an emergency brake or a non-emergency brake, emits signals to control the size of current led to the winding during the non-emergency brake, and emits signals to control the size of current led to the winding and the size of liquid pressure of the friction detent during the emergency brake. The brake disc generates brake force opposite to the rotation direction when rotating in the winding. The invention can reduce action times of the detent, reduces temperature rise of the friction detent, and enhances the performance of a brake system and the road security.

A method for slowing transfer of a heavy work machine on a sloping base using a transportation device equipped with wheels, the work machine including a body, a crawler chassis fitted beneath the

• • body, a set of booms having at least one operating cylinder, a first end and a second end, said set of booms being pivoted at the first end to the work machine and a selected auxiliary device is pivoted at the second end, and a brake surface connected to the auxiliary device, in which method includes the steps of
  • transferring the work machine by supporting the work machine on the crawler chassis at least partly on top of the transportation device,
  • towing the work machine using a transfer vehicle with the aid of the transportation device,
  • using said operating cylinder of the set of booms to press the brake surface against the sloping base to create friction to slow transfer speed of the transportation device on the sloping base, and
  • adjusting pressing of the brake surface taking place through the auxiliary device using the operating cylinder or one set of booms. An arrangement in connection with a heavy work machine for transferring the work machine on a sloping base is also described.

The invention relates to a rubber composition for a tire tread and a tire manufactured using the same, and provides a rubber composition for a tire tread which comprises 100 parts by weight of rubber raw materials containing emulsion polymerized styrene-butadiene rubber, 7-13 parts by weight of environmental friendly softeners, 73-79 parts by weight of fillers, 1.6-1.9 parts by weight of vulcanizing agents, and 0.15-0.25 parts by weight of thiuram vulcanization accelerators. The rubber composition for a tire tread minimizes the release amounts of polycyclic aromatic hydrocarbons (PAH) and nitrosamines, so the composition not only is environmental friendly but also has excellent low fuel consumption, braking performance, and abrasion resistance.

A motor vehicle fitted with a control system for applying braking effect to foundation brakes acting on each wheel of the vehicle, when the braking effect provided by auxiliary brakes, acting on the driven wheels, is lost or significantly reduced is described. Sudden loss of auxiliary brake force can be felt as very bad drivability of the vehicle, a situation that typically occurs in case of low friction between road and tires or if the auxiliary brakes are down controlled to avoid engine stop. By use of a control system, these situations can be avoided. The control system includes a sensor, and a computer for computing and applying the braking effect to the foundation brakes to compensate for the loss of auxiliary braking force. Disclosed is also a method for applying braking effect to the foundation brakes of a motor vehicle.

There is described a method for detecting the ambient pressure by means of a pressure sensor in the intake pipe of an internal combustion engine. A throttle flap is opened so that the pressure drop via the throttle flap can be neglected. The dethrottling of the internal combustion engine is compensated by the appropriate adjustment of the cam shaft in accordance with the operating state of the internal combustion engine, so that the measuring method is not being felt by the driver.