Chinese carmaker patents voice-controlled ‘in-vehicle toilet’

Seres unveils innovation for roadside bathroom convenience

A Chinese automaker, Seres, has secured a patent for a novel vehicle feature it refers to as an “in-vehicle toilet.” The system, designed to extend beneath a passenger seat, allows drivers to use it during travel. Engineers noted in the patent filing that this innovation aims to address the need for bathroom facilities during extended drives, outdoor excursions, or overnight stays in vehicles.

While Seres has not yet revealed a car equipped with this feature, the patent suggests future plans. The device includes a fan and exhaust system to manage odors, as detailed in the filing. Waste is collected in a manually emptied tank, and a rotating heating element is used to evaporate urine and dry other materials. When inactive, the toilet remains hidden under the seat, optimizing interior space without additional room requirements.

“This design enables users to fulfill toilet needs during long journeys, while camping or staying in the car,” the patent document stated.

Seres, based in Chongqing, produces electric sport utility vehicles, known for their height and cargo capacity. These models are primarily sold in mainland China, though the company has expanded to Europe, the Middle East, and Africa. In the 1950s, a Rolls-Royce Silver Wraith featured a built-in television and a toilet beneath the passenger seat, according to auction records.

China’s electric vehicle market is highly competitive, with brands introducing unusual amenities like massage seats, karaoke systems, and fridges. Despite this, Seres has managed to turn a profit, unlike many rivals. Analysts warn that the market’s saturation has led to intense price competition, threatening the viability of several firms.

While in-vehicle toilets are uncommon in regular cars, they are more prevalent in long-distance coaches. Seres’ proposal could position it as a pioneer in integrating such features into everyday vehicles. However, whether this concept will reach production remains unclear.