CN-224211047-U - Linear control braking system with double simulator isolation valves

CN224211047UCN 224211047 UCN224211047 UCN 224211047UCN-224211047-U

Abstract

The utility model relates to the technical field of vehicle line control and movement, and discloses a line control and movement system with double simulator isolation valves, which comprises a simulator unit; the simulator unit adopts a double-valve design and comprises a first simulator isolation valve and a second simulator isolation valve, wherein the first simulator isolation valve and the second simulator isolation valve are arranged in parallel. The high opening pressure of the electromagnetic valve is guaranteed, the overcurrent area of the loop is increased, the foot feeling of a driver is effectively improved, and meanwhile, the reliability of the system is improved, and the service life of the system is prolonged.

Inventors

CHENG YI
TENG HAIHUA
Yi Jiaman
TAO FEN
ZHANG MENGYU

Assignees

武汉瑞立科德斯汽车电子有限责任公司

Dates

Publication Date: 20260508
Application Date: 20250724

Claims (1)

1. A line control system with double simulator isolation valves comprises a simulator unit and is characterized in that the simulator unit comprises a first simulator isolation valve and a second simulator isolation valve, wherein the first simulator isolation valve and the second simulator isolation valve are arranged in parallel, oil outlets of TVS valves are respectively connected with oil inlets of the first simulator isolation valve and the second simulator isolation valve, and the oil outlets of the first simulator isolation valve and the second simulator isolation valve are connected in parallel to form one path and connected with a simulator.

Description

Linear control braking system with double simulator isolation valves Technical Field The utility model relates to the technical field of vehicle brake-by-wire, in particular to a brake-by-wire system with double simulator isolation valves. Background The isolating valve of the existing brake-by-wire upper pedal simulator of the automobile is usually in a single valve scheme, and the scheme is used on a passenger car and basically has no problem. However, if the displacement of the master cylinder is increased, on the one hand, if the cross-sectional area of the orifice of the isolation valve is unchanged, the driver feels very hard and does not step on, and therefore, the cross-sectional area of the orifice of the isolation valve must be increased in order to obtain good foot feel, and on the other hand, if the cross-sectional area of the orifice is increased, which means that the opening pressure that the valve can withstand is reduced, so that, during emergency braking, the pressure of the mechanical master cylinder rises extremely fast at this time, exceeding the opening pressure that the isolation valve can withstand. In this case, although the braking system is allowed to brake by the pressure fed back from the master cylinder pressure sensor, since the isolation valve cannot be opened, the driver does not operate the brake pedal, which may cause the driver to panic, and other accidents caused by the tension of the driver may occur. Therefore, for a large-displacement master cylinder, the selection scheme of the isolation valve ensures that the cross-sectional area of the through hole is enough to allow the pressure oil of the master cylinder to flow through quickly, and the sustainable opening pressure is also enough to be large. However, if a single isolation valve solution is employed, increasing the cross-sectional area of the flow-through orifice and increasing the cracking pressure are inherently contradictory. Therefore, the isolating valve adopts a double-valve scheme, so that the sectional area of the overflow hole can be increased, the opening pressure can be maintained or increased, and the isolating valve is a good design for a large-displacement master cylinder. Disclosure of Invention In order to overcome the defects of the prior art, the utility model provides a wire control and actuation system with double simulator isolation valves, which adopts the technical scheme that the wire control and actuation system with the double simulator isolation valves comprises a simulator unit, wherein the simulator unit comprises a first simulator isolation valve and a second simulator isolation valve; the first simulator isolation valve and the second simulator isolation valve are arranged in parallel, the oil outlets of the TVS valves are respectively connected with the oil inlets of the first simulator isolation valve and the second simulator isolation valve, and the oil outlets of the first simulator isolation valve and the second simulator isolation valve are connected in parallel to form one path and connected with the simulator. Compared with the prior art, the utility model has the beneficial effects that: (1) The experience of a driver is improved, and for a main cylinder with large discharge capacity, the requirement of flow rate and the requirement of opening pressure can be met, so that the foot feel of the driver is more comfortable; (2) The design of the double isolation valves, under the condition that one valve is broken, the other valve can work independently, redundancy is realized, and the reliability of the system can be improved; (3) The service life of the system is prolonged, namely the design of the double isolation valves can effectively reduce the control current of the single isolation valve and prolong the service life of the electromagnetic valve. Drawings FIG. 1 is a schematic diagram of a brake-by-wire system of the present utility model; Wherein the device comprises a 1-TVS valve, a 2-first simulator isolation valve, a 3-second simulator isolation valve, a 4-simulator and a 5-simulator unit. Detailed Description In some large passenger cars and light trucks, the liquid demand of the calipers is 2-3 times that of a common passenger car, so that in these applications, the displacement of the mechanical master cylinder is 2-3 times that of the master cylinder of the common passenger car. Therefore, in order to obtain the same feel as a general passenger car in these vehicle models, the simulator isolation valve flow area for controlling the pressure oil flow rate between the master cylinder and the simulator must also be increased. The problem is that when the driver encounters an emergency and steps on the brake pedal quickly, the pressure in the master cylinder rises very quickly and can reach more than 10 Mpa. On the one hand, to solve the flow problem, on the other hand, to open the valve at high pressure. Both are inherently contradictory in that for a single valve co