Team boss Eric Boullier has called on the Lotus Renault GP team to raise its game and halt a tough run of results this weekend in the Hungarian Grand Prix.

Podium finishes in the opening two races of the season left the team with 30 points following the Malaysian Grand Prix but since then, Vitaly Petrov and Nick Heidfeld have only added an additional 36 in the last eight races.

A tally of just six points from the past three races has seen Renault drop behind Mercedes in the constructors' championship and Boullier insisted there was work to do to try and regain the kind of form displayed earlier in the year.

"Well, I've made no secret of the fact that I'm not satisfied with where we are, no one in the team is," he said. "We started the season well, but that feels like a while ago now and we have to face the facts, which are that we've been off the pace and we are trying hard to put that right. We brought some developments to the car in Germany, which didn't produce nearly enough so we are now all eyes forward to Hungary to ensure we have the opportunity to head on our summer breaks on a high.

"I've expected improvement from our car for a number of races now, and we are making improvement, but we have got to get our heads down and make bigger strides. It's a competitive field out there, with Force India and Sauber also competing in higher positions, so we've got to raise our game starting in Hungary."

Technical chief James Allison insisted that Renault was heading to Hungary confident that it would perform better than in Monaco, where the R31 struggled on the high-downforce layout of the Monte Carlo streets, as the team prepares to switch its focus towards 2012.

"We were not too special at Monaco this year, another high downforce track," he said, "but I think we have resolved some of the issues that bedevilled us there and we are hopeful of a better outing in Hungary.

"We have quite lot of improvements to deliver over the next five races. These developments are largely as a result of research work that is already complete, leaving us with the task of designing and manufacturing them for use in the races. By the time the summer break is complete, most of our factory research resource and around half of our manufacturing capacity will have transferred to next year's car."